WO2006101233A1 - Radiation image acquisition system, console, and program executed in console - Google Patents

Radiation image acquisition system, console, and program executed in console Download PDF

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Publication number
WO2006101233A1
WO2006101233A1 PCT/JP2006/306149 JP2006306149W WO2006101233A1 WO 2006101233 A1 WO2006101233 A1 WO 2006101233A1 JP 2006306149 W JP2006306149 W JP 2006306149W WO 2006101233 A1 WO2006101233 A1 WO 2006101233A1
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WO
WIPO (PCT)
Prior art keywords
console
communication
force set
unit
radiation
Prior art date
Application number
PCT/JP2006/306149
Other languages
French (fr)
Japanese (ja)
Inventor
Yasuaki Tamakoshi
Original Assignee
Konica Minolta Medical & Graphic, Inc.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Konica Minolta Medical & Graphic, Inc. filed Critical Konica Minolta Medical & Graphic, Inc.
Priority to JP2007509368A priority Critical patent/JPWO2006101233A1/en
Publication of WO2006101233A1 publication Critical patent/WO2006101233A1/en

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Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B42/00—Obtaining records using waves other than optical waves; Visualisation of such records by using optical means
    • G03B42/02—Obtaining records using waves other than optical waves; Visualisation of such records by using optical means using X-rays
    • G03B42/021—Apparatus for direct X-ray cinematography
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/30—Cameras or camera modules comprising electronic image sensors; Control thereof for generating image signals from X-rays

Definitions

  • the present invention relates to a radiographic imaging system, a console, and a program executed by the console, and more particularly, to a radiographic imaging system equipped with wireless communication means, a console, and a program executed by the console.
  • a radiation image is an image obtained by irradiating a subject with radiation such as X-rays and detecting the intensity distribution of the radiation transmitted through the subject.
  • a radiographic imaging system using an FPD that detects radiation transmitted through a subject, converts it into an electrical signal, and stores it as radiographic image information.
  • FPD Full Panel Detector
  • This radiographic imaging system using FPD can confirm an image taken in a short time, such as several seconds, after being irradiated with radiation.
  • a force set technology in which a connector that can be connected to either a wireless module or a cable is disclosed in a force set provided with a wireless communication unit and an internal power supply (for example, patents). (Ref. 2). This allows the operator to connect to the wireless module It is possible to select whether radiographic imaging is performed in a state that is easy to handle, or whether multiple imaging is performed continuously without considering the capacity of the internal power supply by connecting to a cable. Yes.
  • Patent Document 1 JP 2004-180931 A
  • Patent Document 2 Japanese Patent Laid-Open No. 2004-173907
  • Patent Document 1 is incapable of communicating wirelessly between the force set and the console due to the arrangement of the subject and the force set as compared with cable communication. Has a problem that tends to be defective.
  • radio wave output of radio communication is due to the subject.
  • large-capacity data such as X-ray image data
  • optical communication that is, tera waves, infrared waves, visible light, or ultraviolet rays
  • high-frequency radio waves such as microwaves
  • the radiographic image acquisition device and the subject are arranged with fine adjustments, so the subject is considered to be an obstacle due to the relationship between the radiographic image acquisition device and the subject arrangement.
  • Communication failure occurs, or due to the relationship between the radiographic image acquisition device and other objects such as the imaging table, other objects such as the imaging table become obstacles or reflections, resulting in poor communication, or radiographic images. Communication failure may occur depending on the directivity of the radiographic image acquisition device communication unit of the acquisition device.
  • X-ray imaging imaging is performed by adjusting the arrangement of the force set and the subject, and the subject becomes an obstacle due to the arrangement, resulting in poor communication.
  • a metallic X-ray shielding member that prevents the influence of X-ray scattering on the captured image
  • a conductive member such as aluminum
  • radio wave absorption and reflection will occur there. It happens.
  • a wireless communication antenna is provided on the force set
  • these metal X-ray shielding members are used for wireless communication with a conductive housing so that the antenna does not hit the subject or the antenna is broken by the subject. When placed close to the antenna, strong directivity occurs in the wireless communication on the force set side. Then, coupled with the fact that the subject becomes an obstacle, communication failure and communication failure are likely to occur.
  • Patent Document 2 includes a force set type X-ray image detector having a connector that can be connected to a wireless module or a cable for communicating with a system control unit. Since it can be selected by attaching / detaching a wireless module or cable to / from the connector, it is assumed that the wireless module will be forgotten to be attached and the total shooting efficiency will be lower than the frequency of occurrence of communication failure. To do. In other words, the power console cannot be determined because the wireless module is connected to the cassette connector and wireless communication is impossible, or the wireless module is connected to the power set. When the console learns that it cannot communicate with the force set, it is necessary to take account of both possibilities.
  • An object of the present invention is to provide a radiographic imaging system that is capable of efficiently capturing images by preventing unnecessary irradiation of radiation to a subject.
  • FIG. 1 is a diagram showing a schematic configuration of an X-ray imaging system according to a first embodiment of the present invention.
  • FIG. 2 is a perspective view showing a schematic configuration of a force set according to an embodiment of the present invention.
  • FIG. 3 is a cross-sectional view of a force set centering on a panel according to an embodiment of the present invention.
  • FIG. 4 is a circuit diagram showing a configuration of a circuit centered on a photodetector according to an embodiment of the present invention.
  • FIG. 5 is a flowchart for performing X-ray interlock in one embodiment of the present invention. is there.
  • FIG. 6 is a diagram showing a schematic configuration of an X-ray imaging system according to a second embodiment of the present invention.
  • Radiation is an electromagnetic wave or particle beam that has a strong ionizing or fluorescent action, and includes X-ray, y-ray, j8-ray, ⁇ -ray, proton beam, deuteron beam and other heavy charged particle beam and neutron beam. .
  • electron rays, X rays, and ⁇ rays are preferred as radiation, and X rays are particularly preferred.
  • the console is a device for the operator to communicate with the force set, and a separate display device or operation device can be connected, or the display device or operation device can be integrated.
  • X-rays are a type of radiation.
  • an X-ray imaging system 1000 is a system that assumes X-ray imaging performed in a hospital. For example, X-ray imaging is performed on a subject.
  • the X-ray room R1 and the X-ray room R2 that controls the X-rays irradiated by the X-ray engineer and processes the X-ray images obtained by irradiating the X-rays. Is.
  • a console 1 is provided in the X-ray control room R2. This console 1 controls the entire X-ray imaging system, and console 1 controls X-ray imaging. It controls image processing of acquired X-ray images.
  • Console 1 may be a mobile terminal.
  • the console 1 is connected to an operation input unit 2 through which an operator inputs a shooting preparation instruction, a shooting instruction, and the content of the instruction.
  • an operation input unit 2 for example, an X-ray irradiation request switch, a touch panel, a mouse, a keyboard, a joystick, or the like can be used, and an operator inputs an X-ray tube voltage or an X-ray tube via the operation input unit 2.
  • X-ray imaging conditions such as current and X-ray irradiation time
  • X-ray imaging control conditions such as imaging timing, imaging region, and imaging method, image processing conditions, image output conditions, force set selection information, order selection information, subject ID, etc. Instructions are entered into console 1.
  • a display unit 3 for displaying an X-ray image or the like is connected to the console 1, and the display 1 of the display unit 3 is controlled by the display control unit 11 constituting the console 1.
  • a liquid crystal monitor, a monitor such as a CRT (Cathode Ray Tube) monitor, an electronic paper, an electronic film, or the like can be used as the display unit 3.
  • the display unit 3 displays characters such as X-ray imaging conditions and image processing conditions, and X-ray images.
  • the console 1 includes a display control unit 11, an input unit 12, a console control unit 13, a console communication unit 14, an image processing unit 15, an image storage unit 16, a console power supply unit 17, and a network communication unit 18.
  • Display control unit 11, input unit 12, console control unit 13, console communication unit 14, image processing unit 15, image storage unit 16, console power supply unit 17, and network communication unit 18 are each connected to a bus. Data exchange is possible.
  • the input unit 12 receives the instruction content from the operation input unit 2.
  • the console control unit 13 determines the imaging conditions based on the instruction content received by the input unit 12 from the operation input unit 2 and the order information received by the network communication unit 18 from the HISZRIS 71. Then, the console control unit 13 transmits the imaging condition information regarding the imaging conditions to the X-ray source 4 and the force set 5 by the console communication unit 14, and controls the X-ray source 4 and the force set 5 to perform X-ray imaging. To do. Further, the console control unit 13 temporarily stores the X-ray image data received by the console communication unit 14 from the force set 5 in the image storage unit 16. The console control unit 13 controls the image processing unit 15 to create thumbnail image data from the X-ray image data temporarily stored in the image storage unit 16. The display control unit 11 displays the created thumbnail.
  • the display unit 3 displays thumbnail images based on the image data.
  • the console control unit 13 performs image processing based on the order information received by the input unit 12 in the X-ray image data in the image processing unit 15 based on the order information of the HISZRIS71, and the image processing is performed.
  • the X-ray image data is controlled to be stored in the image storage unit 16.
  • the console control unit 13 controls the display control unit 11 so that the display unit 3 displays the thumbnail image of the processing result based on the X-ray image data obtained as a result of the image processing by the image processing unit 15.
  • the console control unit 13 then performs re-image processing of the X-ray image data to the display control unit 11 based on the instruction content received by the input unit 12 from the operation input unit 2 and then to the image processing unit 15.
  • the display control unit 11 is controlled so that the display unit 3 displays the image processing result, and the X-ray image data is transferred, stored, and displayed to an external device on the network.
  • the console control unit 13 has a function of managing channels transmitted by the force set 5 and channels transmitted by other devices using microwaves. In other words, the console control unit 13 performs control so that when the force set 5 transmits by radio of a predetermined channel, other devices do not transmit and interfere with each other by radio of the channel.
  • the console control unit 13 performs radio communication that can obtain the antenna power of the radio repeater 6 when a new device is introduced or always through the radio repeater 6 connected to the console communication unit 14 via a communication cable.
  • Channel information is acquired, and the channel used by other devices is confirmed and stored. If the channel of the other device and the channel used in the force set 5 are the same, the console control unit 13 changes the channel of the force set 5 if possible, and if possible. Control to change the channel of other devices.
  • the console control unit 13 does not use other devices when transmitting radiation X-ray image data. Controls the display control unit 11 to display a warning.
  • console control unit 13 it is possible to apply a mother board on which a CPU (Central Processing Unit), a RAM (Random Access Memory), a ROM (Read Only Memory) and other memories are mounted.
  • CPU Central Processing Unit
  • RAM Random Access Memory
  • ROM Read Only Memory
  • the CPU reads the program stored in the ROM or hard disk, expands the program on the RAM, and in accordance with the expanded program, each part of the console 1, the X-ray source 4, Force set 5, control external devices.
  • the CPU reads various processing programs including system programs stored in the ROM or the hard disk, develops them on the RAM, and executes various processes described later.
  • the RAM is a volatile memory that temporarily stores various programs, input or output data, etc. that can be read and executed by the CPU in various processes controlled by the CPU of the console control unit 13. Form a work area.
  • the ROM is a non-volatile memory, for example, and stores a system program executed by the CPU, various programs corresponding to the system program, and the like. These various programs are stored in the form of readable program code, and the CPU sequentially executes operations according to the program code.
  • a hard disk may be used instead of the ROM.
  • the hard disk stores a system program executed by the CPU and various application programs.
  • the hard disk receives and stores various application programs such as the program of the present invention from the console communication unit 14 via a transmission medium of another device power network line such as a server, part or all of the hard disk. It may be.
  • the CPU receives a storage device such as a hard disk of a server provided on the network, and receives various application programs such as the program of the present invention, expands it on the RAM, and performs various processes such as the processing of the present invention. You can do it!
  • the display control unit 11 controls the display unit 3 to display images, characters, and the like based on image data, character data, and the like based on the control of the console control unit 13.
  • a graphic board or the like can be used for the display control unit 11.
  • the console communication unit 14 is connected to the X-ray source 4 and the wireless repeater 6 via a communication cable.
  • the console communication unit 14 can communicate with the force set 5 via the wireless repeater 6.
  • the console communication unit 14 can transmit a control signal based on the instruction content to the X-ray source 4 and the force set 5 by analog communication or digital communication, while transmitting X-ray image data from the force set 5. It can be received.
  • the console communication unit 14 detects a communication state of wireless communication between the force set communication unit 52 and the wireless repeater 6.
  • the communication status of wireless communication is the decrease in received radio field strength of wireless communication or wireless communication. It can be detected by the amount of noise in the transmission band.
  • the wireless repeater 6 transmits information on the communication state of the wireless communication between the force set communication unit 52 and the wireless repeater 6 detected by the wireless repeater 6 to the console communication unit 14, and the console communication unit
  • the console control unit 13 detects the communication state of wireless communication. Further, the console control unit 13 may detect the communication state of the wireless communication by detecting the execution communication speed. In this case, the execution communication speed may be detected by the wireless repeater 6 or may be detected by the console communication unit 14. Then, the console control unit 13 detects the communication state of the wireless communication from the information on the execution communication speed.
  • console control unit 13 When the console control unit 13 detects that wireless communication between the force set communication unit 52 and the wireless repeater 6 is impossible, that is, the console control unit 13 detects that wireless communication is not possible. Then, the console control unit 13 controls the display control unit 11 so as to display that the display unit 3 is in a communication disabled state.
  • console control unit 13 detects that the console communication unit 14 is receiving X-ray image data from the force set 5, that is, the console communication unit 14 receives X-ray image data from the force set 5. If the display unit 3 is in the middle, the power to display the X-ray image data being received on the display unit 3 is displayed.
  • Console control unit 13 controls display control unit 11 so that display unit 3 stops displaying that X-ray image data is being received. .
  • the console control unit 13 detects that the wireless communication between the force set communication unit 52 and the wireless repeater 6 is in a poor state, that is, the wireless communication is in a poor communication state and the console control unit 13 When this is detected, the console control unit 13 controls the display control unit 11 to display that the display unit 3 is in a communication failure state.
  • the display indicating that the communication is poor may be a display indicating that the communication is poor, or the absolute value, relative value, level, etc. of the communication speed or the strength of the radio communication wave (such as the radio wave intensity or the received light intensity). May be displayed, an absolute value, a relative value, or a level of the SZN ratio may be displayed, or any other form of display may be used.
  • the reception status of the mobile phone is displayed with three antenna symbols and indicators, and the indication of poor communication is displayed with two or one antenna symbols and indicators depending on the degree of communication.
  • the console communication unit 14 generates an analog signal for wireless transmission and converts it into an analog signal force digital signal received wirelessly.
  • the wireless repeater 6 is connected to the console communication unit 14. It is also possible to wirelessly transmit an analog signal for wireless transmission from the console communication unit 14 and transmit the wirelessly received analog signal to the console communication unit 14.
  • the communication state of the wireless communication can be detected by the console communication unit 14 based on a decrease in received radio wave intensity of the wireless communication or a noise amount in the wireless communication band.
  • the communication state information of the wireless communication between the force set communication unit 52 and the wireless repeater 6 detected by the console communication unit 14 is transmitted to the console control unit 13, and the console control unit 13 performs the wireless communication. Detect communication status.
  • the console control unit 13 allows the console control unit 13 to cause interference when other devices transmit by radio of the channel when the force set 5 transmits by radio of the predetermined channel.
  • console control unit 13 can change the channel of force set 5 if possible. If so, control the other device's channel to be changed, and then detect the wireless communication state. However, if it is impossible to change each channel, the console control unit 13 prevents the display unit 3 from using other devices when transmitting radiation X-ray image data.
  • the display control unit 11 is controlled so as to display a warning, and the state of wireless communication under the state is detected.
  • console controller 13 when the console controller 13 transmits the force set 5 wirelessly on a predetermined channel, other devices may transmit and interfere with each other wirelessly on the channel. There is one that simply detects the state of wireless communication on a predetermined channel without performing such control. For example, when force set 5 transmits wirelessly on a predetermined channel, it is clear that other devices will not transmit wirelessly on that channel. Or the case where the cost for providing such control is reduced.
  • the console control unit 13 detects that the communication state of the wireless communication between the force set communication unit 52 and the wireless repeater 6 is impossible in this way, the X-ray tube 42 emits X-rays.
  • the X-ray interlock is controlled so that it is not irradiated.
  • the X-ray interlock is a control that prevents X-rays from being irradiated from the X-ray tube 42 even when an operator inputs an imaging instruction.
  • an X-ray irradiation prohibition signal is transmitted from the console control unit 11 to the X-ray source control unit 43 via the console communication unit 14, and an X-ray irradiation prohibition signal is received.
  • the method that the radiation source control unit 43 prohibits X-ray irradiation the method that prevents the operation input unit 2 from moving even if the operator tries to input a shooting instruction from the operation input unit 2, and the operator
  • a communication cable connecting the console communication unit 14, the X-ray source 4 and the wireless repeater 6 is detachable.
  • image transfer can be performed at high speed, so X-ray image acquisition, X-ray image processing, X-ray image confirmation, etc. can be performed in a shorter time.
  • the image processing unit 15 performs image processing on the X-ray image data received from the force set 5 by the console communication unit 14.
  • the image processing unit 15 performs image data correction processing, enlargement compression processing, spatial filtering processing, recursive processing, gradation processing, scattered radiation correction processing, grid correction processing, frequency enhancement processing, dynamic range (DR) based on the instruction content.
  • Image processing such as compression processing is performed.
  • the image storage unit 16 has a storage device for storing X-ray image data.
  • the X-ray image data received by the console communication unit 14 from the force set 5 is temporarily stored, and the image processed X Save line image data.
  • the console power supply unit 17 is supplied with power from an external power source (not shown) such as an AC power source or an internal power source (not shown) such as a knotter or battery, and constitutes the console 1. each Power is supplied to the department.
  • an external power source such as an AC power source or an internal power source (not shown) such as a knotter or battery
  • the external power supply of the console power supply unit 17 is detachable.
  • the console power supply 17 is supplied with power from an external power supply, it is not necessary to charge, so it is possible to shoot for a long time.
  • the network communication unit 18 communicates various types of information between the console 1 and an external device via a LAN (Local Area Network).
  • a LAN Local Area Network
  • an external device for example, HIS / RI S (Hospital Information by system / Raaioiogy Information Information System;;) ⁇ ⁇ ⁇ 3 ⁇ 4 "Sungsam Z Radiology Information System" terminal 71, imager 72, image processor 73, view ⁇ 74, file It is possible to connect a server 75 etc.
  • the network communication unit 18 outputs X-ray image data to an external device according to a predetermined protocol such as DICOM (Digital Imaging and Communications in Medicine).
  • DICOM Digital Imaging and Communications in Medicine
  • the HISZRIS terminal 71 obtains information on the subject, imaging region and imaging method from the HISZRIS and provides them to the console 1.
  • the imager 72 records an X-ray image on an image recording medium such as a film based on the X-ray image data output from the console 1.
  • the image processing device 73 performs processing for X-ray image data output from the console 1 and processing for CAD (Computer Aided Diagnosis), and stores it in the file server 75.
  • View IV 74 displays an X-ray image based on the X-ray image data output from console 1.
  • the file server 75 is a file server that stores X-ray image data that has undergone processed image processing.
  • the network communication unit 18 outputs predetermined floor control such as DICOM (Digital Imaging and Communications in Medicine) X image data to an external device.
  • DICOM Digital Imaging and Communications in Medicine
  • the display control unit 11 and the console control unit 13 are provided separately, but the display control unit and the console control unit may be separate bodies.
  • a mother board having a CPU and a memory mounted as a console control unit is used, and a graphic subsystem incorporated in the mother board is used as a display control unit.
  • the console control unit 13 may also serve as a display control unit.
  • the image processing unit 15 may be a force console control unit 13 that is a separate body from the console control unit 13 and also serves as the image processing unit.
  • an X-ray source 4 for irradiating the subject with X-rays and a force set 5 for detecting the X-rays applied to the subject and acquiring X-ray image data are arranged.
  • the X-ray room R1 is a room covered with an X-ray shielding member so that X-rays from the X-ray source 4 do not leak outside the X-ray room R1.
  • an X-ray shielding member is a metal member such as a lead plate, that is, a conductive member, and has a property of suppressing transmission of radio waves and a property of reflecting radio waves.
  • the force set 5 is portable and can be taken out of the X-ray room R1.
  • a radio repeater 6 is installed in the X-ray imaging room R1.
  • the wireless repeater 6 performs wireless communication with the cassette 5.
  • the wireless repeater 6 communicates with the console 1 via a communication cable.
  • the image data obtained by the force set 5 is transmitted to the console S via the wireless repeater 6, and control signals and various information are communicated between the console 1 and the force set 5.
  • the console 1 and the wireless repeater 6 are connected by the cable, and the radio repeater 6 is arranged in the X-ray imaging room R1, so that the X-ray imaging separated from the console 1 by the radiation shielding member. Even if the force set 5 is used in the room R1, the console 1 and the force set 5 can perform good wireless communication.
  • wireless communication methods include, but are not limited to, a method of communicating using radio waves, a method of communicating using light such as infrared rays, visible light, and ultraviolet rays.
  • 156Mbps full-duplex (3 12Mbps) wireless LAN standard (ARIB STD-T74) using 60GHz band and high-speed (25Mbps) communication using 19GHz band are possible.
  • a method using a wireless LAN compliant with the RCR STD-34 standard a method using FWA (Fixed Wireless Access) using the 18 GHz band and 19 GHz band, 1. 4 GHz band, 2 GHz band and 2.1 GHz Next-generation mobile phone methods using bands such as IEEE802.11a, 802.l ib, 802.l lg, etc., which are wireless LAN standards using 2.4GHz and 5.2GHz bands, etc.
  • Wireless LAN This method, 2.
  • a wireless communication standard such as Bluetooth using 45 GHz band, or UWB (Ultra Wide Band)
  • UWB Ultra Wide Band
  • a wireless communication standard such as Bluetooth using 45 GHz band, or UWB (Ultra Wide Band)
  • ISM industrial, scientific and medical band
  • There is a method of transmitting by radio waves with a frequency exceeding 1 GHz such as a method of using the communication band for medical or industrial use.
  • radio waves with a frequency of 3 X 10 2 GHz or less are preferred.
  • methods for communication using radio waves with a frequency of 1 GHz or less include, for example, a method using a specific low power radio using a 7 X 10 MHz band or 4 X 10 2 MHz band, a method using PHS, an 8 X 10 2 MHz band, Examples include a method using a mobile phone using the 9 X 10 2 MHz band.
  • radio waves with a frequency of 3 X 10 MHz or higher are preferred.
  • Examples of the communication method using light include, but are not limited to, a method using an optical wireless LAN and a method using near infrared rays according to the IrDA standard.
  • a method using an optical wireless LAN there is a method of connecting a repeater to a wired LAN and communicating via an optical communication hub.
  • the wireless repeater 6 has a function of a charger of the force set 5 and a function of a holder when the force set 5 is not used.
  • the wireless repeater 6 is provided with a connector, and when this connector and the force set 5 are connected, the internal power source 51 of the force set 5 is charged.
  • the wireless repeater 6 is preferably formed so that the force set 5 can be easily attached and detached.
  • the wireless repeater 6 has a shape that holds the force set 5 while being charged, so that the force set 5 can function as a charger while functioning as a holder when not in use.
  • the X-ray source 4 is provided with a high-voltage generation source 41 that generates a high-voltage and an X-ray tube 42 that generates X-rays when a high-voltage is applied by the high-voltage generation source 41.
  • An X-ray diaphragm device (not shown) for adjusting the X-ray irradiation range is provided at the X-ray irradiation port of the X-ray tube 42. X Since the X-ray irradiation device controls the X-ray irradiation direction according to the console force control signal, the X-ray irradiation range is adjusted according to the imaging region.
  • the X-ray source 4 is provided with an X-ray source control unit 43, and the X-ray source control unit 43 is connected to the high-pressure generation source 41 and the X-ray tube 42, respectively.
  • the X-ray source control unit 43 drives and controls each unit of the X-ray source 4 based on the control signal transmitted from the console communication unit 14. That is, the X-ray source control unit 43 controls the high pressure generation source 41 and the X-ray tube 42.
  • the force set includes a housing 55 as shown in FIG. 2, and the inside is protected by the housing 55 and is portable.
  • the casing 55 is made of a light metal such as aluminum or magnesium. By using light metal for the housing 55, the strength of the housing 55 can be maintained.
  • the force set 5 and the position and orientation of the subject are adjusted and arranged by the operator so that X-rays transmitted at the desired position and orientation of the subject are photographed. (In some cases, the position and orientation of the X-ray source 6 are also adjusted and arranged.) Thereafter, the X-ray source 4 generates X-rays according to instructions from the console 1. Then, X-rays that have passed through the subject in the desired position 'are incident on the force set 5 from the X-ray source 4.
  • the force set 5 is provided with an internal power supply 51, a force set communication unit 52, a force set control unit 53, and a panel 54.
  • the internal power supply 51, the force set communication unit 52, the force set control unit 53, and the panel 54 are each connected to a bus in the force set 5.
  • the power source of the force set 5 may be an external power source that supplies external force power such as a power unit connected to the force set 5 via a power line or an AC power source, but an internal power source provided in the force set 5 51 Is preferable because it is easy to handle.
  • the internal power supply 51 provided in the force set 5 may be a power supply unit provided externally to the force set 5, but is preferably the internal power supply 51 provided in the force set 5.
  • the force set 5 has an internal power supply 51 for supplying power
  • a power supply state it is preferable to have, for example, a shootable state and a state of lower power consumption than the shootable state.
  • the state under shooting standby mode control and It is preferable to have a state under sleep mode control with low power consumption.
  • the imaging operation is an operation necessary for obtaining radiographic image data by radiography. For example, in the case of the panel 54 shown in the embodiment, initialization of the panel 54 and electrical energy generated by radiation irradiation are performed. These operations are storage of image data, reading of electrical signals, and image data conversion.
  • the radiographable state is a state in which radiation image data can be obtained immediately by this radiographing operation.
  • the internal power supply 51 supplies power to each unit arranged in the force set 5.
  • the internal power supply 51 is provided with a capacitor that can be charged and can handle the power consumed during photographing.
  • a capacitor an electrolytic double layer capacitor can be applied.
  • As the internal power source 51 it is possible to apply a primary battery such as a manganese battery, a nickel-cadmium battery, a mercury battery, or a lead battery that requires battery replacement, or a rechargeable secondary battery.
  • the capacity of the internal power supply 51 is preferably 4 or more (especially 7 or more) when converted to the maximum number of X-ray images that can be taken continuously.
  • the capacity of the internal power supply 51 is 100 or less (especially 50 or less) when converted to the maximum number of X-ray images that can be taken continuously from the viewpoint of miniaturization and weight reduction and low cost. It is preferable that it exists.
  • the force set communication unit 52 is configured to be able to wirelessly communicate with the console communication unit 14 via the wireless repeater 6, and a signal is transmitted between the force set communication unit 52 and the console communication unit 14.
  • the X-ray image data can be transmitted from the force set communication unit 52 to the console communication unit 14.
  • the force set control unit 53 controls each unit disposed in the cassette 5 based on the control signal received by the force set communication unit 52.
  • the panel 54 outputs X-ray image data based on the X-rays transmitted through the subject.
  • the panel 5 of the present embodiment is an indirect flat panel detector (FPD).
  • Fig. 2 is a perspective view showing a schematic configuration of the force cassette 5
  • Fig. 3 is a cassette centered on the panel 54. A cross-sectional view of TE 5 is shown.
  • the present invention is not limited to this example, and the scintillator has a different thickness or type or a different panel area that is the area of the imaging region. It is also applicable to use. The thicker the scintillator, the higher the sensitivity, and the thinner the scintillator, the higher the spatial resolution. Spectral sensitivity varies depending on the type of scintillator.
  • the panel 54 is provided with a scintillator 541 that detects X-rays transmitted through the subject and converts the detected X-rays into fluorescence in the visible region (hereinafter referred to as “visible light”) in layers.
  • a scintillator 541 that detects X-rays transmitted through the subject and converts the detected X-rays into fluorescence in the visible region (hereinafter referred to as “visible light”) in layers.
  • the scintillator 541 includes a phosphor as a main component.
  • the scintillator 541 is a layer that emits visible light by the recombination energy when the host substance of the phosphor is excited (absorbed) by the irradiated X-rays.
  • this phosphor for example, a matrix such as CaWO, CdWO, etc.
  • a protective layer is provided above the scintillator 541.
  • the protective layer protects the scintillator 541 and completely covers the upper part and the edge of the scintillator 541.
  • any material may be used as long as it has an effect of protecting the scintillator 541 from moisture.
  • a phosphor having hygroscopicity in particular, a columnar crystal phosphor made of alkali halide and further alkali halide
  • a polycrystal formed by the CVD method disclosed in US Pat. No. 6,469,305 is used.
  • organic films made of laxylylene organic films formed from polymers containing silazane or siloxazane type polymer compounds such as polysilazane, polysiloxazan, or organic films formed by plasma polymerization. I like it.
  • a photodetector 542 formed of amorphous silicon is laminated and extends under the scintillator 541, and the visible light emitted from the scintillator 541 is converted into electric energy by the photodetector 542. Is output.
  • the panel 54 is preferably composed of pixels of 1000 X 1000 pixels or more (especially 2000 X 2000 pixels or more) from the viewpoint of diagnostic performance of X-ray images!
  • the panel 54 has 10,000 X 1 from the viewpoint of human visibility limit and X-ray image processing speed. It is preferred to be composed of pixels of 10,000 pixels or less (especially 6000 x 6000 pixels or less)!
  • the size of the imaging area of the panel 54 is preferably 10 cm X 10 cm or more (especially, 20 cm X 20 cm or more) from the viewpoint of diagnostic properties by X-ray images!
  • the size of the shooting area of the panel 54 is preferably an area of 70 cm x 70 cm or less (especially 50 cm x 50 cm or less)!
  • the size of one pixel of the panel 54 is preferably 40 m X 40 m or more (especially 70 m X 70 m or more) from the viewpoint of reducing X-ray exposure!
  • the size of one pixel of the panel 54 is preferably 200 m x 200 m or less (especially 160 m x 160 m or less) from the viewpoint of the diagnostic property of the X-ray image!
  • the panel 54 is composed of 4096 ⁇ 3072 pixel covers, the area power of the imaging region is S430 mm ⁇ 320 mm, and the size of one pixel is 105 m ⁇ 105 ⁇ m.
  • the photodetector 542 is two-dimensionally provided with a collection electrode 5421 for reading out the electric energy stored in accordance with the intensity of the irradiated X-rays.
  • the collecting electrode 5421 is one electrode of a capacitor 5424 so that electric energy can be stored in the capacitor 5424.
  • one collecting electrode 5421 corresponds to one pixel of X-ray image data.
  • a scanning line 5422 and a signal line 5423 are disposed between the collecting electrodes 5421 adjacent to each other.
  • the scanning line 5422 and the signal line 5423 are orthogonal to each other.
  • a switching thin film transistor 5425 (TFT: Thin Film Transistor, hereinafter referred to as a transistor) for controlling storage and reading of electric energy is connected.
  • the transistor 5425 has a drain electrode or a source electrode connected to the collecting electrode 54 21, and a gate electrode connected to the scanning line 5422.
  • the drain electrode is connected to the scanning line 5422, the source electrode is connected to the signal line 5423, and when the source electrode is connected to the collection electrode 5421, the drain electrode is connected to the signal line 5423.
  • the signal line 5423 is provided with an initialization transistor 5427 to which, for example, a drain electrode is connected.
  • the source electrode of the transistor 5427 is grounded.
  • the gate electrode is connected to the reset line 5426.
  • the transistor 5425 and the transistor 5427 are preferably formed using a silicon stacked structure or an organic semiconductor.
  • a reset line 5426 to which a reset signal RT is transmitted from the scan drive circuit 543 is connected to the scan drive circuit 543 at right angles to the signal line 5423.
  • the reset line 5426 is connected to the gate electrode of the initialization transistor 5427 that is turned on by the reset signal RT.
  • the initialization transistor 5427 has a gate electrode connected to the reset line 5426, a drain electrode connected to the signal line 5423, and a source electrode grounded. When the source electrode is connected to the signal line 5423, the drain electrode is grounded.
  • the scan drive circuit 543 supplies the reset signal RT to the initialization transistor 5427 via the reset line 5426 to turn on the initialization transistor 5427, and the scan drive circuit 543 turns on the transistor 5425 via the scan line 5422.
  • the transistor 5425 is turned on by supplying the read signal RS to the transistor 5425, the electric energy force stored in the capacitor 5424 is discharged to the outside of the photodetector 542 through the S transistor 5425. That is, the electric energy released from the photodetector 542 is released to the ground electrode through the signal line 5423 and the initialization transistor 5427.
  • reset initialization
  • a scanning drive circuit 543 that supplies a readout signal RS to the scanning line 5422 is connected to the scanning line 5422.
  • the transistor 5425 connected to the scan line 5422 to which the read signal RS is supplied is turned on, and the electric energy accumulated in the capacitor 5424 connected to the transistor 5425 is read and supplied to the signal line 5423.
  • the scan driving circuit 543 can generate a signal for each pixel of the X-ray image data by driving the transistor 5425.
  • a signal reading circuit 544 is connected to the signal line 5423. This signal reading circuit 544 is supplied with the electrical energy stored in the capacitor 5424 and read out to the force signal line 5423.
  • the signal reading circuit 544 includes a signal converter 544 that supplies a voltage signal SV proportional to the amount of electrical energy supplied to the signal reading circuit 544 to the AZD converter 5442. 1 and an AZD conversion 5442 that converts the voltage signal SV from the signal converter 5441 into a digital signal and supplies the digital signal to the data conversion unit 545.
  • a data conversion unit 545 is connected to the signal reading circuit 544.
  • the data converter 545 generates X-ray image data based on the digital signal supplied from the signal reading circuit 544.
  • the console control unit 13 When high-resolution image data is not necessary or when the image data is acquired quickly, the console control unit 13 sometimes receives the thinning-out, pixel average, region, and the like depending on the imaging method selected by the operator. A control signal such as extraction is transmitted to the force setting control unit 53.
  • the force setting control unit 53 executes the following thinning, pixel averaging, region extraction, and the like according to the received control signals such as thinning, pixel averaging, region extraction, and the like.
  • Thinning is performed by reading out only odd-numbered columns or even-numbered columns and thinning out the number of pixels to be read out to 1Z4 of the total number of pixels, or by thinning out to 1Z9, 1Z16, etc. in the same way. Note that the thinning method is not limited to this method.
  • the pixel average can be calculated by simultaneously driving a plurality of scanning lines 5422 and performing analog addition of two pixels in the same column direction.
  • the pixel average is not limited to being calculated by adding two pixels, but can be easily obtained by performing analog addition of a plurality of pixels in the column signal wiring direction.
  • the addition value of square pixels such as 2 X 2 can be obtained in combination with the above-described analog addition. As a result, it is possible to read data at high speed without making the irradiated X-rays useless.
  • the area extraction has means for limiting the image data capture area. This means specifies an acquisition area of image data that requires force such as the instruction content of the imaging method, and the force setting control unit 53 changes the data acquisition range of the scanning drive circuit 543 based on the specified acquisition area.
  • the panel 54 drives the changed capture range.
  • a memory 546 is connected to the data conversion unit 545.
  • the X-ray image data generated by the data conversion unit 545 is stored. Further, the memory 546 memory stores gain correction data in advance.
  • the memory 546 is composed of RAM (Random Access Memory) and nonvolatile memory. ing.
  • the memory 546 can batch write the X-ray image data sequentially generated by the data conversion unit 545 to the nonvolatile memory after sequentially writing to the RAM.
  • Non-volatile memory is composed of two or more memory parts such as EEPROM and flash memory, and one of the memory parts can be written while the other is being erased.
  • the force set 5 includes the memory 546 for temporarily storing X-ray image data in order to temporarily store the X-ray image data.
  • X-ray image data saved in the memory 546 can be stored in the memory 546 without the need to delay X-ray imaging until the communication status improves even if the communication is poor or communication is impossible. It is possible to transmit from force set 5 to console 1 at a communication speed according to the communication state between force set 5 and console 1.
  • the capacity of the memory 546 is preferably 4 or more (especially 10 or more) in terms of the number of images that can be stored with the maximum data size from the viewpoint of shooting efficiency.
  • the capacity of the memory 546 is preferably 1000 or less (particularly 100 or less) in terms of the number of images that can store images of the maximum data size from the viewpoint of low cost.
  • a support 547 on a flat plate formed of a glass substrate is provided below the photodetector 542, and the stacked structure of the scintillator 541 and the photodetector 542 is supported by the support 547. .
  • An X-ray dose sensor 548 is provided on the lower surface of the support 547 (that is, the surface opposite to the X-ray irradiation direction of the support 547).
  • the X-ray dose sensor 548 detects the X-ray dose transmitted through the light detector 542, and transmits a predetermined X-ray dose signal to the force set control unit 53 when the X-ray dose reaches a predetermined amount.
  • an amorphous silicon light-receiving element is used as the X-ray dose sensor 548.
  • the X-ray dose sensor is not limited to this, and an X-ray sensor that directly detects X-rays using a light-receiving element made of crystalline silicon or a sensor that detects fluorescence using a scintillator may be used.
  • the force set 5 is driven by the power from the internal power supply 51 and is portable, and the force set communication unit 52 and the console communication unit 14 communicate via wireless communication. Therefore, while maintaining the linkage with the console 1, it is not necessary to shoot with care so that the cable does not get tangled with the subject.
  • the power shown in the example in which the panel 54 is configured by one panel having 4096 ⁇ 3072 pixels is not limited to this, and for example, four panels having nonel 54 force S2048 ⁇ 1536 pixels are provided. Those composed of small panels can also be used. In this way, when the panel 54 is composed of a plurality of small panels, the force required to combine four small panels into one panel 54 improves the yield of each panel 54, so the overall yield There is an advantage that the cost is improved and the cost is reduced.
  • the force shown in the example of reading the electric energy of the X-rays irradiated using the scintillator 541 and the photodetector 542 is not limited to this, and the X-rays can be directly converted into electric energy. It is possible to apply a photodetector.
  • an X-ray detector composed of an X-ray electrical energy converter using amorphous Se or PbI2 and an amorphous silicon TFT may be used.
  • the number of AZD converters is preferably 4 or more, particularly 8 or more in order to shorten the image reading time and obtain a desired SZN ratio.
  • the number of AZD converters is preferably 64 or less, particularly 32 or less, in order to reduce cost and reduce size. As a result, the analog signal band and the AZD conversion rate are not increased unnecessarily.
  • the force shown in the example of the support 547 formed of glass is not limited to this, and a support formed of a resin or the like can be applied.
  • the console 1 is installed in the X-ray control room R2.
  • the console 1 may be a portable terminal capable of wireless communication.
  • a radio repeater is also installed in the X-ray control room R2, and the console communication unit 14 can communicate with both the radio repeater 6 in the X-ray radiographing room R1 and the radio repeater in the X-ray control room R2.
  • it is preferable that communication with the force set 5 is possible in both the X-ray imaging room R1 and the X-ray control room R2.
  • the operator can shoot the subject in the X-ray room R1 just as in the conventional X-ray room R2.
  • the X-ray image can be confirmed on the console 1 while instructing the position, etc., and image processing of X-ray image data can be started.
  • the X-ray room R1 and the X-ray control room You can check the X-ray image during the travel time between R2 and start image processing of the X-ray image data, and repeat the cycle to check the X-ray image from the X-ray image. Total shooting efficiency can be improved.
  • the wireless repeater 6 can detect the communication state of the wireless communication between the force set 5 and the wireless repeater 6 from a decrease in the received radio wave strength of the wireless communication or the amount of noise in the wireless communication band. is there.
  • the wireless repeater 6 sends the information on the communication state of the wireless communication between the force set communication unit 52 and the wireless repeater 6 detected by the wireless repeater 6 to the console communication unit 14, and the console communication
  • the console control unit 13 detects the communication state of the wireless communication.
  • the communication state of the wireless communication between the console communication unit 14 and the wireless repeater 6 can be detected by the console communication unit 14 such as a decrease in the received radio wave intensity of the wireless communication and the amount of noise in the wireless communication band.
  • the communication state of wireless communication may be detected by detecting the execution communication speed.
  • the wireless repeater 6 separately detects the effective communication speed of the wireless communication between the force set 5 and the wireless repeater 6 and the effective communication speed of the wireless communication between the wireless repeater 6 and the console communication unit 14.
  • the wireless repeater 6 determines the total communication speed of the wireless communication between the force set 5 and the wireless repeater 6 and the wireless communication between the wireless repeater 6 and the console communication unit 14. It may be detected, and from force set 5 to console communication unit 14 including wireless communication between force set 5 and wireless repeater 6 and wireless communication between wireless repeater 6 and console communication unit 14
  • the console communication unit 14 may detect the total execution communication speed. Based on the information on the execution communication speed, the console control unit 13 detects the communication state of the wireless communication.
  • console control unit 13 When the console control unit 13 detects that the wireless communication between the force set communication unit 52 and the wireless repeater 6 cannot be performed, that is, the wireless communication cannot be performed and the console control is performed. When the console control unit 13 detects that the wireless communication between the console communication unit 14 and the wireless repeater 6 is not possible, the console control unit 13 performs display control. Control unit 11 to confirm that communication with display unit 3 is disabled indicate.
  • console communication unit 14 detects that X-ray image data is being received from the force set 5, that is, when the console communication unit 14 is receiving X-ray image data from the force set 5, the console The control unit 13 controls the display control unit 11 to display on the display unit 3 that X-ray image data is being received.
  • the console control unit 13 detects that wireless communication is not possible when the display unit 3 displays that X-ray image data is being received, the console control unit 13 performs display control. Control unit 11 to display on display 3 that X-ray image data is being received.
  • console control unit 13 when the console control unit 13 detects that the wireless communication between the force set communication unit 52 and the wireless repeater 6 is in a poor state, the wireless communication between the console communication unit 14 and the wireless repeater 6 is performed.
  • the console control unit 13 may control the display control unit 11 so that the display unit displays another display when the console control unit 13 detects that the communication is poor! ,.
  • the force setting control unit 53 controls the scan driving circuit 543 to be kept in the OFF state.
  • the force set control unit 52 keeps the scanning line 5422, the signal line 5423, and the reset line 5 426 at the same potential so that no bias is applied to the collecting electrode 5421.
  • the force setting control unit 53 controls the scanning drive circuit 543.
  • the power supply of the signal reading circuit 544 may be kept off, and the potentials of the scanning line 5422, the signal line 5423, and the reset line 5426 may be set to the GND potential.
  • the state in which no bias is applied to the scanning drive circuit 543 and the signal reading circuit 544 includes a photographing standby mode and a sleep mode.
  • the force setting communication unit 52 does not apply a bias potential to the photodiode, and the scanning drive circuit 543 and the signal reading circuit 544 rise quickly, so the scanning drive circuit 543 and the signal reading circuit 544
  • the power set communication unit 52 does not supply power to the data conversion unit 545. This is preferable because it can further reduce costs.
  • the scanning drive circuit 543 and the signal reading circuit 544 it is preferable to provide a sleep mode that consumes less power than the imaging standby mode. It is preferable to shift to the sleep mode after completely transmitting the captured image to the console 1. In the sleep mode, it is possible to stop the power supply to the power set communication unit 52 and the entire high speed transmission function or the entire transmission function and the memory, leaving only the functions necessary to start the shooting standby mode by an instruction from the console 1. Like U ⁇ .
  • the bias potential to the photodiode is not applied, and the high-speed transmission function or transmission of the scanning drive circuit 543, the signal reading circuit 544, the data conversion unit 545, the memory 546, and the force set communication unit 52 is performed. It is preferable not to supply power to the entire function. This can further reduce unnecessary power consumption.
  • the force set communication unit 52 detects the potentials of the scanning line 5422, the signal line 5423, and the reset line 5426. Is not applied to the collecting electrode 5421, that is, a voltage is not substantially applied to a plurality of pixels, and is deteriorated by substantially applying a voltage to a photodiode or a transistor. That is, deterioration of a plurality of pixels can be suppressed. In addition, useless power consumption can be suppressed.
  • Console control unit 13 determines the shooting conditions based on the instruction contents of the operator and powerful order information such as HISZRIS71. Based on these shooting conditions!
  • the obtained radiography preparation instruction signal is transmitted to the X-ray source control unit 43 and the force setting control unit 53 via the console communication unit 14 to shift to a radiographable state.
  • the imaging preparation instruction is an instruction that the operator inputs via the operation input unit 2 such as the 1st switch of the X-ray irradiation switch.
  • input of predetermined items such as subject information and shooting information may be used as a shooting preparation instruction.
  • the X-ray source control unit 43 drives and controls the high-voltage generation source 41. Then, the X-ray tube 42 is shifted to a state where a high pressure is applied.
  • the force setting control unit 53 When the force setting control unit 53 receives the shooting preparation instruction signal, the force setting control unit 53 shifts to a shooting ready state. That is, all pixels are reset at predetermined intervals until a shooting instruction is input in a shooting enabled state, thereby preventing electrical energy from being accumulated in the capacitor 5424 due to dark current. In addition, since the time during which the photographing enabled state is continued is unknown, the predetermined interval is set longer than that at the time of photographing, and the ON time of the transistor 5425 is set shorter than that at the time of photographing. As a result, in a state where photographing can be performed, the reading operation with a load applied to the transistor 5425 is reduced.
  • the force setting control unit 53 transmits a shooting enabled state shift signal to the console 1.
  • the console control unit 13 receives the shooting ready state transition signal
  • the display control unit 11 controls the display unit 3 so that the display unit 3 displays the cassette shooting ready state display indicating that the force set has shifted to the shooting ready state. To do.
  • the console control unit 13 determines the imaging condition based on the instruction content of the operator or the order information from the HISZRIS 71, etc., and the imaging condition information regarding this imaging condition Is transmitted to the X-ray source control unit 43 and the force set control unit 53 via the console communication unit 14.
  • the console control unit 13 When the console control unit 13 receives an X-ray irradiation instruction from the operator such as turning on the 2nd switch of the X-ray irradiation switch, for example, the console communication unit 14 sends an imaging instruction signal to the force setting control unit 53 of the force set 53. When the console communication unit 14 receives a preparation end signal from the cassette 5, the console communication unit 14 controls the X-ray irradiation signal to be transmitted to the X-ray source 4. Then, after the X-ray irradiation instruction is input to the console control unit 13, the console control unit 13 controls the X-ray source 4 and the force set 5 and performs imaging while synchronizing them.
  • the force setting control unit 53 When the force setting control unit 53 receives the imaging instruction signal, the force setting control unit 53 initializes the panel 54 and shifts to a state in which the panel 54 can store electric energy. Specifically, refreshing is performed, and all pixels dedicated for the imaging sequence are reset a predetermined number of times and all pixels dedicated to the electric energy storage state are reset to transit to the electric energy storage state. The required force of exposure The period until the preparation for imaging is completed is required for practical use. Perform an elementary reset. In addition, if an exposure request occurs for any state force of driving in the imaging enabled state, the operation can be performed by shortening the period until the imaging preparation is completed by entering the immediate imaging sequence driving. To improve performance.
  • the force set control unit 53 transmits a preparation completion signal for the force set 5 to the console communication unit 14.
  • the console communication unit 14 transmits an X-ray irradiation signal to the X-ray source 4 and simultaneously transmits a force set preparation completion signal to the console control unit 13.
  • the console control unit 13 When the console control unit 13 receives the force set preparation end signal, the console control unit 13 controls the display control unit 11 so that the display unit 3 displays an X-ray radiographing display indicating that X-ray radiography is being performed.
  • the X-ray source control unit 43 drives and controls the high-pressure generation source 41 to apply a high pressure to the X-ray tube 42 to generate X-rays from the X-ray source 4.
  • X-rays generated from the X-ray source 4 are irradiated to the subject after the X-ray irradiation range is adjusted by an X-ray aperture device provided at the X-ray irradiation port.
  • the X-ray that has passed through the subject enters the force set 5.
  • X-rays incident on the force set 5 are converted into visible light by the scintillator 541.
  • the X-ray dose sensor 548 detects the X-ray dose irradiated to the force set 5.
  • the detected X-ray dose is detected by an X-ray dose sensor 548.
  • the X-ray dose sensor 548 transmits a predetermined X-ray dose signal to the force set control unit 53.
  • the force set control unit 53 receives the predetermined X-ray dose signal, the force set control unit 53 transmits an X-ray end signal to the console communication unit 14 via the wireless repeater 6.
  • the console communication unit 14 When receiving the X-ray end signal, the console communication unit 14 transmits the X-ray end signal to the console control unit 13 and transmits the X-ray irradiation stop signal to the X-ray source control unit 43.
  • the X-ray source control unit 43 receives this X-ray irradiation stop signal, the X-ray source control unit 43 drives and controls the high-pressure generation source 41, and the high-pressure generation source 41 stops applying high pressure to the X-ray tube 42. This stops X-ray generation.
  • the force setting control unit 53 controls the scanning drive circuit 543 and the signal reading circuit 544 based on the X-ray end signal.
  • the scanning drive circuit 543 reads the electrical energy acquired by the photodetector 542 and inputs the acquired electrical energy to the signal reading circuit 544. For example, a predetermined time from the start or end of transmission of the X-ray end signal Thereafter, the electrical energy acquired by the photodetector 542 may be read out, or the electrical energy acquired by the photodetector 542 may be read out simultaneously with the end of transmission.
  • the signal reading circuit 544 converts the input electric energy into a digital signal.
  • the data conversion unit 545 converts the digital signal into image data.
  • the memory 546 temporarily stores the image data converted by the data conversion unit 545.
  • the force setting control unit 53 acquires the correction image data after acquiring the image data.
  • the image data for correction is dark image data that is not irradiated with X-rays, and is used for correcting X-ray images in order to obtain high-quality X-ray images.
  • the correction image data acquisition method is the same as the image data acquisition method except that X-rays are not irradiated.
  • the electrical energy storage time is set to be equal when image data is acquired and when correction image data is acquired.
  • the electric energy storage time is the time from when the reset operation is completed, that is, after turning off the transistor 5425 at the time of resetting until the next time the transistor 5425 is turned on to read out electric energy. It is. Therefore, the timing at which electrical energy storage starts and the electrical energy storage time differ for each scanning line 5422.
  • the data conversion unit 545 performs offset correction on the configured image data based on the acquired correction image data, and then, based on the gain correction data acquired in advance and stored in the memory 546. Correct the gain. And in the case of a panel composed of insensitive pixels and multiple small panels, the image is continuously interpolated so as not to cause a sense of incongruity at the joints of the small panels, and the correction process derived from the panel is completed. To do.
  • the data conversion unit 545 may be configured such that the force setting control unit 53, which is a separate body from the force setting control unit 53, also serves as the data conversion unit 545.
  • the force set control unit 53 transmits the X-ray image via the force set communication unit 52, the wireless repeater 6, and the console communication unit 14. Send image data.
  • the force set 5 includes the memory 546 that functions by receiving power from the internal power supply 51, and temporarily obtains X-ray image data obtained by the panel 54 and transmitted by the force set communication unit 52. Data generation from panel 54, and the power set and console It functions as an accumulator for communication, and the force setting force can be transferred to the console according to the communication state between the force setting and the console.
  • the memory is RAM, the force set 5 can store data even when the data generation speed from the panel 54 is high.
  • the console control unit 13 When receiving the X-ray image data, the console control unit 13 causes the image storage unit 16 to temporarily store the X-ray image data. Then, the console control unit 13 controls the image processing unit 15 so that the X-ray image data force temporarily stored in the image storage unit 16 also creates thumbnail image data. The display control unit 11 controls the display unit 3 to display thumbnail images based on the created thumbnail image data.
  • the image processing unit 15 performs image processing on the image data based on the instruction content of the operator or order information from the HISZRIS 71 or the like.
  • This image processed image data is displayed on the display unit 3 and simultaneously transmitted to the image storage unit 16 to be stored as image data. Further, based on the operator's instruction, the image processing unit 15 re-images the image data, and the display unit 3 displays the image processing result of the image data.
  • the network communication unit 18 also transfers the image data to an imager 72, an image processing terminal 73, a view screen 74, a file server 75, etc., which are external devices on the network. When image data is transferred from console 1, the transferred external device functions correspondingly.
  • the imager 72 records this X-ray image data on an image recording medium such as a film.
  • the image processing terminal 73 performs image processing of the X-ray image data and processing for CAD (Computer Aided Diagnosis), and stores the processed X-ray image data in the file server 75.
  • the view 74 displays an X-ray image based on this X-ray image data.
  • the file server 75 stores this X-ray image data.
  • the force setting control unit 53 is in a shooting ready state, in a state under control of one or a plurality of shooting standby modes in which the power consumption is lower than in the shooting ready state, and further in a low power consumption.
  • the force set control unit 53 sends the power supply state information indicating the power supply state of the force set 5 to the force set communication unit 52 in accordance with the control timing for changing the power supply state of the force set 5.
  • Control to send Since the console control unit 13 can control the force set 5 using the power supply state information indicating the power supply state of the force set 5 received by the console communication unit 14, it can control good shooting and can improve the shooting efficiency.
  • console control unit 13 can display on the display unit 3 according to the power supply state information, the operator determines whether the force set 5 can immediately perform X-ray imaging, for example, Shooting with other cassette modalities can be done first or later to improve shooting efficiency.
  • FIG. 5 shows a flowchart when the X-ray interlock is performed.
  • the console control unit 13 detects the communication state of the wireless communication between the force set communication unit 52 and the wireless repeater 6 using the detection result of the console communication unit 14 or the wireless repeater 6.
  • the console control unit 13 indicates that the display unit 3 is wirelessly connected.
  • the display control unit 11 is controlled to display that the communication is impossible (step Sl l).
  • the console control unit 13 turns on the X-ray interlock and performs control so that X-ray irradiation cannot be performed (step S12).
  • step S10 determines that communication between the force set communication unit 52 and the wireless repeater 6 is not impossible (step S10: No)
  • the console control unit 13 determines that the force set communication unit 52 and the wireless repeater 6 It is determined whether or not communication with 6 is poor (step S13). If the console control unit 13 determines that the wireless communication between the force set communication unit 52 and the wireless repeater 6 is poor (step S13: Yes), the console control unit 13 indicates that the display unit 3 is in a poor wireless communication state.
  • the display control unit 11 is controlled so as to display that it is (Step S14), and if it is determined that the communication between the force set communication unit 52 and the wireless repeater 6 is not bad (Step S13: No), the S Proceed to 15.
  • Step S 15 using the power supply state information indicating the power supply state of the cassette 5 received by the console communication unit 14, the console control unit 13 determines whether or not the force cassette 5 is in a photographing enabled state (Step S 15). . If the console control unit 13 determines that the imaging is not possible (step S15: No), the console control unit 13 turns on the X-ray interlock and controls so that X-ray irradiation cannot be performed (step S12). On the other hand, the console control unit 13 determines that shooting is possible. Then (step S15: No), the X-ray interlock is turned off and control is performed so that X-ray irradiation can be performed (step S12).
  • the console communication unit 14 detects the inability to communicate between the console communication unit 14 and the force set communication unit 52, and the X-ray source 4 Since X-rays can be prevented from being irradiated, a radiographic image cannot be acquired, and radiation can be performed efficiently by preventing unnecessary irradiation of radiation to the subject.
  • the force set 5 is provided with an encryption means for encrypting the X-ray image data to be transmitted
  • the console 1 is provided with an encryption / decryption means for decrypting the encrypted X-ray image data.
  • Such a cipher key means may be used by the force set control unit 53 or the force set communication unit 52, or a cipher key unit may be provided separately from these.
  • Such encryption / decryption means may also serve as the wireless repeater 6, the console communication unit 14 or the console control unit 13, or may be provided with a decryption unit.
  • WEP Wired Equivalent Privacy: ⁇ using a common key with a key length of 64 bits or 128 bits
  • IEEE802.il, IEEE802.il, etc. 11i TKIP Temporal Key Integrity Protocol: Encryption that automatically changes the key for encryption
  • WPA Wi-Fi Protected Access: Encryption using TKIP and IE EE802.1x together
  • AES Advanced Encryption Standard
  • access restriction functions include, for example, SSID (Service Set Identifier: ID that is unique to the connected device and ignores packets that do not match the SSID included in the packet header), MAC (Media Access Control, media Access control) address (address unique to the LAN card) filtering function (allows connection only to the terminal with the registered MAC address), ANY connection denial function (function set on the access point, client SSID A function that denies connection to the access point when the setting power is “ANY.” Normally, the client SSID setting is “ANY”.
  • SSID Service Set Identifier: ID that is unique to the connected device and ignores packets that do not match the SSID included in the packet header
  • MAC Media Access Control, media Access control address
  • filtering function allows connection only to the terminal with the registered MAC address
  • ANY connection denial function function set on the access point
  • RA DIUS authentication
  • the force set 5 compresses the X-ray image data
  • the console 1 side performs the decoding decoding. That is, it is preferable that the force set 5 is provided with a compression means for compressing the X-ray image data to be transmitted, and the console 1 is provided with a compression decoding means for decoding the compressed X-ray image data.
  • a compression key means may be combined with the force set control unit 53 or the force set communication unit 52, or a compression key unit may be provided separately from these.
  • a compression / decryption means may be served by the wireless repeater 6, the console communication unit 14 or the console control unit 13, or a compression / decoding unit may be provided separately from these.
  • the encryption process is performed, the encryption decryption process is performed, and then the compression decryption process is performed. That is, the X-ray image data compressed by the compression means is encrypted by the encryption means, and the X-ray image data encrypted by the encryption / decryption means is compressed and decrypted by the compression / decryption means. Is preferred.
  • the present invention is not limited to this, and the force set and console are in one pair M, N pairs. It can be used in correspondence with 1, N to M (N and M are natural numbers of 2 or more).
  • a network between the force set and the console is provided, the correspondence between the force set and the console is stored in the correspondence information holding unit, and the correspondence information holding unit is provided on the network or in the console. It is preferable to control the force set.
  • a storage medium storing a software program that realizes the functions of the above-described embodiments is supplied to a system or an apparatus. It goes without saying that this can also be achieved by the computer (or CPU or MPU) of the device reading and executing the program stored in the storage medium.
  • Storage media for storing programs, etc. include non-volatile memory, power-backed volatile memory, ROM memory, optical disks, and hard disks. Any storage media such as magnetic disk and magneto-optical disk can be applied! /.
  • an OS (basic system or operating system) that runs on a computer based on the instructions of the program that not only realizes the functions of the above-described embodiments by executing the program read by the computer. Needless to say, a part or all of the actual processing is performed, and the case where the functions of the above-described embodiment are realized by the processing.
  • the function expansion is performed based on the instruction of the program code. It goes without saying that the CPU or the like provided in the board or function expansion unit performs part or all of the actual processing and the functions of the above-described embodiments are realized by the processing.
  • Such a program may be provided from outside via a network or a line. Even when an externally supplied program is used, the program is stored in a non-volatile memory, a power-backed up volatile memory, a magnetic disk such as an optical disk or a hard disk, or a storage medium such as a magneto-optical disk. Well, ...
  • the operation input unit includes an X-ray irradiation switch, an X-ray source instruction content input unit, and a console instruction content input unit.
  • the X-ray irradiation switch and X-ray source instruction content input section are connected to the X-ray source control section, and the console instruction content input section is connected to the console input section.
  • the console communication unit is connected to the wireless repeater, but is not connected to the X-ray source control unit. Other configurations are the same as those in the first embodiment.
  • FIG. 6 shows a schematic configuration of an X-ray imaging system 1000 according to the second embodiment.
  • the operation input unit 2 has an X-ray irradiation switch 21 for inputting an imaging preparation instruction and an imaging instruction by an operator, and an X-ray source for inputting an instruction content to an X-ray source control unit by an operator.
  • a source instruction content input unit 22 and a console instruction content input unit 23 for inputting the instruction content to the console by an operator are provided.
  • the instructions include X-ray imaging conditions such as X-ray tube voltage, X-ray tube current, and X-ray irradiation time, X-ray imaging control conditions such as imaging timing, imaging region, and imaging method, image processing conditions, and images. Output conditions, force set selection information, order selection information, subject ID, etc.
  • the X-ray irradiation switch 21 is connected to the X-ray source control unit 43 and the input unit 12, respectively.
  • the X-ray irradiation switch 21 is provided with a first switch for inputting an imaging preparation instruction and a second switch for inputting an imaging instruction.
  • the instruction by the X-ray irradiation switch 21 is input to the X-ray source control unit 43 and the input. Input to part 12.
  • the X-ray irradiation switch 21 is structured such that it can be input to the second switch after being input to the first switch.
  • An X-ray source control unit 43 is connected to the X-ray source instruction content input unit 22.
  • the X-ray source control unit 43 controls driving of the high-pressure source 41 and the X-ray tube 42 based on the instruction content input from the X-ray source instruction content input unit 22.
  • An input unit 12 is connected to the console instruction content input unit 23.
  • the instruction content input to the input unit 12 is transmitted to the console control unit 13.
  • the console control unit 13 drives and controls the console 1 and the force set 5 based on the received instruction content.
  • the console control unit 13 Based on the fact that the console communication unit 14 detects that the communication state of the wireless communication between the force set communication unit 52 and the wireless repeater 6 is incommunicable or poor communication, the console control unit 13 detects the X-ray irradiation switch. 21 is controlled so that the imaging instruction is not transmitted to the X-ray tube 42 even if the operator presses the second switch and inputs the imaging instruction.
  • the console control unit 13 controls the X-ray source control unit 43 when the console communication unit 14 detects that the communication state of the wireless communication with the force set communication unit 52 is incommunicable or poor communication, and controls the operator Even if the user presses the first varnish switch and inputs an imaging instruction, the X-ray source control unit 43 may not receive the imaging instruction.
  • the X-ray source control unit 43 drives and controls the high-pressure generation source 41 based on an imaging preparation instruction by the first switch to shift to a state in which a high pressure is applied to the X-ray tube 42.
  • the console control unit 13 Based on the imaging preparation instruction by the first switch input to the input unit 12, the console control unit 13 transmits an imaging preparation instruction to the force set 5 via the console communication unit 14 and the wireless repeater 6.
  • the cassette control unit 53 repeats reset at a predetermined interval based on the received imaging preparation instruction until the imaging instruction is input, and prevents electric energy from being accumulated in the capacitor 5424 due to dark current.
  • the X-ray source control unit 43 drives and controls the high-pressure generation source 41 based on an imaging instruction by the second switch to apply a high pressure to the X-ray tube 42 to generate radiation.
  • the console control unit 13 Based on the imaging preparation instruction by the first switch input to the input unit 12, the console control unit 13 drives and controls the force set 5, and performs imaging with radiation emitted from the X-ray source 4.
  • X-rays irradiated from the X-ray source 4 pass through the subject and enter the force set 5. Based on the X-rays incident on the cassette 5, image data is acquired and transmitted to the console 1 via the wireless repeater 6 and the console communication unit 14.
  • the console communication unit 14 detects the inability to communicate between the console communication unit 14 and the force set communication unit 52, and the X-ray source 4 Since X-rays can be prevented from being irradiated, a radiographic image cannot be acquired, and radiation can be performed efficiently by preventing unnecessary irradiation of radiation to the subject.
  • force set communication means for communicating with the console via wireless communication
  • radiation image acquisition means for obtaining radiation image data by radiography
  • radiation image data obtained from the radiation image acquisition means are used for the force set communication.
  • a force set having a cassette control means to be transmitted by the communication means, and a console that communicates with the force set via wireless communication.
  • a radiographic imaging system comprising: a radio communication means; and a console control means for controlling a radiation interlock so as to prevent radiation irradiation of the radiation source when the wireless communication is detected to be in an incommunicable state.
  • the radiation interlock is controlled to prevent radiation irradiation. Occurrence of extra exposure to the subject can be suppressed.
  • the force set control means causes the force set communication means to transmit power supply state information indicating a state of power supply to the radiation image acquisition means to the console
  • the console control means includes the console control means, Since the radiation interlock is controlled according to the power supply information received by the console communication means, the radiation interlock can be controlled according to the state of power supply to the radiation image acquisition means, and the radiation image acquisition means It is possible to suppress the occurrence of excessive exposure to the subject by irradiating radiation when the power supply state of the camera is inappropriate for radiography.
  • the console control unit controls the display unit to display the power supply state to the radiation image acquisition unit according to the power supply information received by the console communication unit.
  • the operator can confirm whether or not it takes a while to perform radiography by checking the display on the display means, and can appropriately select the order with other radiographing operations, improving the total radiography efficiency.
  • the force set has an internal power supply for supplying power to the radiation image acquisition means, the force set communication means, and the force set control means, and is a portable cableless.
  • An operator who does not need to carefully handle the cable so that the cable does not get tangled with the subject can concentrate on the radiography, reducing the number of imaging errors and causing an additional exposure to the subject. While being suppressed, the overall shooting efficiency is improved.
  • the force set is often installed in a radiography room covered with a radiation shielding member, while the console is often installed outside the radiography room.
  • the console communication unit can communicate with the wireless repeater via a communication cable.
  • the wireless repeater By installing the wireless repeater in the radiation imaging room, wireless communication performed between the force set communication unit and the wireless repeater can be satisfactorily performed.
  • the console is a portable terminal in which the console communication means communicates with the wireless repeater via wireless communication
  • the console is instructed to the subject in the radiation imaging room about the imaging position and the like. You can check the radiation image and start image processing of the radiation image data. Therefore, it is possible to improve the total imaging efficiency of the entire radiography that repeats the cycle of radiography, confirmation of the radiographic image, and image processing.
  • the force set is equipped with a memory for temporarily storing radiation image data
  • the acquired radiation image data can be temporarily stored in the memory, and even if communication is poor or communication is not possible, It is not necessary to delay radiography until the quality improves, and the radiographic image data stored in the memory can be transmitted to the console at the communication speed according to the communication status between the force set and the console. .
  • the console is a force set communication unit that communicates with the console via wireless communication, a radiological image acquisition unit that acquires radiographic image data by radiography, and the radiographic image acquisition unit.
  • Console communication means that communicates via wireless communication with a force set having force set control means for transmitting radiation image data by the force set communication means; and
  • the console has a console control unit that controls the radiation interlock so as to prevent radiation from the source. Because the radiation interlock is controlled to prevent radiation exposure, the subject is irradiated with radiation even though wireless communication is not possible. It is suppressed the occurrence of a situation that makes the Do not exposure.
  • the force set control means causes the force set communication means to transmit power supply state information indicating a state of power supply to the radiation image acquisition means to the console, and the console control means Since the radiation interlock is controlled according to the power supply information received by the console communication means, the radiation interlock can be controlled according to the state of power supply to the radiation image acquisition means, and the radiation image acquisition means It is possible to suppress the occurrence of excessive exposure to the subject by irradiating radiation when the power supply state of the camera is inappropriate for radiography.
  • the console control unit controls the display unit to display the power supply state to the radiation image acquisition unit according to the power supply information received by the console communication unit.
  • the console control unit can display the power supply status of the power set power supply on the display unit, so that the operator can confirm whether or not a certain time is required for radiography by displaying on the display means. Therefore, it is possible to appropriately select the order with other shooting tasks, and the total shooting efficiency is improved.
  • a program executed by a console computer which is a force set communication unit that communicates with the console via wireless communication, a radiation image acquisition unit that obtains radiation image data by radiography, and the radiation
  • the computer of the console having console communication means for communicating via wireless communication with a cassette having force set control means for transmitting the radiation image data obtained from the image acquisition means by the force set communication means.
  • a communication state detecting step for detecting a force or a force of a state in which the wireless communication cannot be performed; and an interface for controlling a radiation interlock so as to prevent radiation irradiation of the radiation source when the wireless communication is detected to be in a state in which communication is not possible.
  • This is a program that realizes the lock control step.
  • the radiation interlock is controlled so as to prevent radiation exposure. It is possible to suppress the occurrence of a situation where the subject is exposed to radiation and causes the subject to be exposed further.
  • the force set control means causes the force set communication means to transmit power supply state information indicating a state of power supply to the radiation image acquisition means to the console. Further, the console communication Evaluating the power supply information received by the means And a second interlock control step for controlling the radiation interlock according to the evaluation result of the power supply information. Because the radiation interlock is controlled according to the state of power supply to the radiation image acquisition means, the radiation supply to the radiation image acquisition means is unsuitable for radiation imaging, and radiation is applied to the subject. The occurrence of an accidental exposure is suppressed.
  • the computer of the console controls the display means, and further, according to the result of evaluation of the power supply information, the display showing the state of power supply to the radiation image acquisition means
  • This is a program that realizes the display control step that is controlled by the means, so that the power supply status of the cassette power supply can be displayed on the display unit when it is executed by the console computer, and radiation imaging is performed. Therefore, the operator can confirm whether or not the status is necessary for a while by checking the display on the display means, so that the order with other shooting tasks can be selected appropriately, and the total shooting efficiency is improved.
  • the present invention can be used in the field of radiographic imaging, particularly in the medical field.

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  • General Physics & Mathematics (AREA)
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Abstract

A radiation image acquisition system includes: a cassette having cassette communication means for communication with a console via radio communication, radiation image acquisition means for obtaining radiation image data by radiation imaging, and cassette control means causing the cassette communication means to transmit the radiation image data obtained from the radiation image acquisition means; and the console having console communication means for communication with the cassette via radio communication, and console control means for controlling radiation interlock so as to prevent radiation application of the radiation source if the radio communication is detected to be in a communication-disabled state.

Description

明 細 書  Specification
放射線画像撮影システム、コンソール、コンソールで実行されるプログラム 技術分野  Radiation imaging system, console, program executed by console
[0001] 本発明は、放射線画像撮影システム、コンソール、コンソールで実行されるプロダラ ムに係り、特に、無線通信手段を備えた放射線画像撮影システム、コンソール、コン ノールで実行されるプログラムに関する。 背景技術  The present invention relates to a radiographic imaging system, a console, and a program executed by the console, and more particularly, to a radiographic imaging system equipped with wireless communication means, a console, and a program executed by the console. Background art
[0002] 従来より、医療診断には、 X線画像に代表される放射線画像が広く用いられている 。放射線画像とは、被写体に X線等の放射線を照射し、この被写体を透過した放射 線の強度分布を検出することによって得られる画像のことである。  Conventionally, radiation images represented by X-ray images have been widely used for medical diagnosis. A radiation image is an image obtained by irradiating a subject with radiation such as X-rays and detecting the intensity distribution of the radiation transmitted through the subject.
[0003] この放射線画像を得るために、 CR (Computed Radiography)やフィルムを用いた撮 影装置が知られている。しかし、 CRを用いた放射線画像撮影システムは、放射線を 照射して力 撮影した画像を確認するまでに数十秒力 数分という長時間を要する ため、撮影した画像の不良を確認したときには、撮影室外にいる被写体を呼び戻し、 再撮影を行う必要が生ずるおそれがある。  In order to obtain this radiation image, an imaging apparatus using CR (Computed Radiography) or a film is known. However, the radiographic imaging system using CR requires a long time of several tens of seconds and several minutes to confirm the captured image by irradiating radiation. It may be necessary to recall the subject outside the room and re-shoot.
[0004] このため、近年では、放射線画像を得るために、被写体を透過した放射線を検出し て電気信号に変換し、放射線画像情報として蓄積する FPD (Flat Panel Detector)を 用いた放射線画像撮影システムが提案されて 、る。この FPDを用いた放射線画像撮 影システムは、放射線を照射してから撮影した画像を数秒と 、う短時間で画像を確 認することができる。  [0004] Therefore, in recent years, in order to obtain a radiographic image, a radiographic imaging system using an FPD (Flat Panel Detector) that detects radiation transmitted through a subject, converts it into an electrical signal, and stores it as radiographic image information. Has been proposed. This radiographic imaging system using FPD can confirm an image taken in a short time, such as several seconds, after being irradiated with radiation.
[0005] また、 FPDを内蔵して無線通信部と内部電源とが設けられた力セッテの技術が開 示されている（例えば、特許文献 1参照)。この配線がされていない力セッテは、コンソ ールと無線通信により通信することや力セッテ内部の内部電源力 電力を供給するこ とが可能であり、また、力セッテの取り扱い性が高ぐ自由に運搬できる利点がある。  [0005] In addition, a force set technology in which an FPD is incorporated and a wireless communication unit and an internal power source are provided has been disclosed (for example, see Patent Document 1). The force set that is not wired can communicate with the console by wireless communication, supply internal power from the force set, and can be easily handled. Has the advantage of being transportable.
[0006] 更に、無線通信部と内部電源とが設けられた力セッテに無線モジュール又はケー ブルのいずれかと接続することのできるコネクタが設けられた力セッテの技術が開示 されている（例えば、特許文献 2参照)。これにより、操作者が無線モジュールと接続 して取り扱い性の高い状態で放射線画像撮影を行うか、又は、ケーブルと接続して 内部電源の容量を考慮することなく連続して多数の撮影を行うかを、選択できること ができるようになつている。 [0006] Further, a force set technology in which a connector that can be connected to either a wireless module or a cable is disclosed in a force set provided with a wireless communication unit and an internal power supply (for example, patents). (Ref. 2). This allows the operator to connect to the wireless module It is possible to select whether radiographic imaging is performed in a state that is easy to handle, or whether multiple imaging is performed continuously without considering the capacity of the internal power supply by connecting to a cable. Yes.
特許文献 1 :特開 2004— 180931号公報  Patent Document 1: JP 2004-180931 A
特許文献 2：特開 2004— 173907号公報  Patent Document 2: Japanese Patent Laid-Open No. 2004-173907
発明の開示  Disclosure of the invention
発明が解決しょうとする課題  Problems to be solved by the invention
[0007] し力しながら、特許文献 1に記載されて 、る技術は、ケーブル通信と比較すると、被 写体や力セッテとの配置によって、力セッテとコンソールとの無線通信が通信不能や 通信不良になりやすい問題を有して 、る。  [0007] However, the technique described in Patent Document 1 is incapable of communicating wirelessly between the force set and the console due to the arrangement of the subject and the force set as compared with cable communication. Has a problem that tends to be defective.
[0008] 無線通信には、様々な種類があるが、放射線画像取得装置 (特にカセッテ）のよう に人体に近接又は密着させて用いる機器の場合、電波通信の電波出力は被写体の ために、また、法律上の制約により制限される。 X線画像データ等の大容量データを 高速に通信する手段としては、例えば、光通信 (すなわち、テラ波、赤外波、可視光 又は紫外線)や、マイクロ波など高周波数の電波を用いたものがある。  [0008] There are various types of wireless communication, but in the case of a device that is used close to or in close contact with the human body, such as a radiographic image acquisition device (particularly a cassette), the radio wave output of radio communication is due to the subject. Limited by legal restrictions. As means for high-speed communication of large-capacity data such as X-ray image data, for example, optical communication (that is, tera waves, infrared waves, visible light, or ultraviolet rays), or those using high-frequency radio waves such as microwaves There is.
しかし、光通信では、通信経路上に障害物があると、通信不能となるし、マイクロ波 などの高周波数の電波は、直進性、指向性が強ぐ通信経路上に障害物があると、 障害物によって信号が遮断され障害物の陰には届き難い「シャドウイング (Shadowing) 」や、様々な反射が合成されることにより信号が弱められる「マルチパスフェージング（ Multi Pass Fading)」等の問題がある。  However, in optical communication, if there are obstacles on the communication path, communication will be disabled, and high-frequency radio waves such as microwaves will have straight lines and directivity, and if there are obstacles on the communication path, Problems such as “Shadowing”, where the signal is blocked by an obstacle and difficult to reach behind the obstacle, and “Multi Pass Fading”, where the signal is weakened by combining various reflections There is.
特に、放射線画像取得装置を用いた X線撮影では、放射線画像取得装置と被写 体の配置を微妙に調整して撮影するので、放射線画像取得装置と被写体の配置の 関係により被写体が障害物となって通信障害が生じたり、放射線画像取得装置と撮 影台等の他の物の配置の関係により撮影台等の他の物が障害物や反射物となって 通信不良が生じたり、放射線画像取得装置の放射線画像取得装置通信部の指向性 によって通信不良が生じたりする。  In particular, in X-ray imaging using a radiographic image acquisition device, the radiographic image acquisition device and the subject are arranged with fine adjustments, so the subject is considered to be an obstacle due to the relationship between the radiographic image acquisition device and the subject arrangement. Communication failure occurs, or due to the relationship between the radiographic image acquisition device and other objects such as the imaging table, other objects such as the imaging table become obstacles or reflections, resulting in poor communication, or radiographic images. Communication failure may occur depending on the directivity of the radiographic image acquisition device communication unit of the acquisition device.
[0009] すなわち、 X線撮影では、力セッテと被写体との配置を調整して撮影するので、その 配置により被写体が障害物となって通信不良が生じる。特に、力セッテの内部には、 X線散乱の撮影画像への影響を防止する金属製の X線遮蔽部材が設けられたり、力 セッテ内部の筐体として、アルミなどの導電性部材が設けられたりすると、そこで電波 吸収や反射が生じたりする。また、力セッテに無線通信用アンテナを設ける場合、ァ ンテナが被写体に当ったり、被写体によってアンテナが折れたりしないように、これら の金属製の X線遮蔽部材ゃ導電性の筐体と無線通信のアンテナとは近接して配置さ れると、力セッテ側の無線通信に強い指向性が生じる。すると、被写体が障害物とな ることと相まって、通信不良や通信不能が発生しやすくなる。 That is, in X-ray imaging, imaging is performed by adjusting the arrangement of the force set and the subject, and the subject becomes an obstacle due to the arrangement, resulting in poor communication. In particular, inside the force sette, If a metallic X-ray shielding member that prevents the influence of X-ray scattering on the captured image is provided, or if a conductive member such as aluminum is provided as a housing inside the force set, radio wave absorption and reflection will occur there. It happens. In addition, when a wireless communication antenna is provided on the force set, these metal X-ray shielding members are used for wireless communication with a conductive housing so that the antenna does not hit the subject or the antenna is broken by the subject. When placed close to the antenna, strong directivity occurs in the wireless communication on the force set side. Then, coupled with the fact that the subject becomes an obstacle, communication failure and communication failure are likely to occur.
[0010] また、特許文献 2に記載されて 、る技術は、力セッテ型 X線画像検出器が、システム 制御部と通信するための無線モジュール又はケーブルと接続可能なコネクタを有し、 ユーザがコネクタに無線モジュール又はケーブルを着脱することにより選択できるた めに、却って、通信不能な状態の発生頻度とは比較にならない程、無線モジュール の着け忘れが生じ、トータルとしての撮影効率が低くなると推量する。すなわち、カセ ッテのコネクタに無線モジュールが接続されて 、て無線通信が通信不能なの力、力 セッテに無線モジュールが接続されて ヽな 、の力コンソール側では判断できな 、の で、操作者は、コンソール側で力セッテと通信できないことを知った際に、両方の可能 性があることを考慮して対応することが必要である。  [0010] In addition, the technique described in Patent Document 2 includes a force set type X-ray image detector having a connector that can be connected to a wireless module or a cable for communicating with a system control unit. Since it can be selected by attaching / detaching a wireless module or cable to / from the connector, it is assumed that the wireless module will be forgotten to be attached and the total shooting efficiency will be lower than the frequency of occurrence of communication failure. To do. In other words, the power console cannot be determined because the wireless module is connected to the cassette connector and wireless communication is impossible, or the wireless module is connected to the power set. When the console learns that it cannot communicate with the force set, it is necessary to take account of both possibilities.
[0011] そこで、本発明は、以上のような課題を解決するためになされたものであり、カセッ テとコンソールとの通信が不能なときに撮影の実施を阻止することにより、放射線撮 影画像を取得することができず、かつ被写体に不必要な放射線の照射を防止し、効 率的に撮影を行うことができる放射線画像撮影システムを提供することを目的とする。 図面の簡単な説明 [0011] Therefore, the present invention has been made to solve the above-described problems, and radiographic images are obtained by preventing the imaging from being performed when communication between the cassette and the console is impossible. An object of the present invention is to provide a radiographic imaging system that is capable of efficiently capturing images by preventing unnecessary irradiation of radiation to a subject. Brief Description of Drawings
[0012] [図 1]本発明の第一の実施形態の X線画像撮影システムの概略構成を示す図である  FIG. 1 is a diagram showing a schematic configuration of an X-ray imaging system according to a first embodiment of the present invention.
[図 2]本発明の一実施形態の力セッテの概略構成を示す斜視図である。 FIG. 2 is a perspective view showing a schematic configuration of a force set according to an embodiment of the present invention.
[図 3]本発明の一実施形態のパネルを中心とした力セッテの断面図である。  FIG. 3 is a cross-sectional view of a force set centering on a panel according to an embodiment of the present invention.
[図 4]本発明の一実施形態の光検出器を中心とした回路の構成を示す回路図である  FIG. 4 is a circuit diagram showing a configuration of a circuit centered on a photodetector according to an embodiment of the present invention.
[図 5]本発明の一実施形態において X線インターロックをするときのフローチャートで ある。 FIG. 5 is a flowchart for performing X-ray interlock in one embodiment of the present invention. is there.
[図 6]本発明の第二の実施形態の X線画像撮影システムの概略構成を示す図である 発明を実施するための最良の形態  FIG. 6 is a diagram showing a schematic configuration of an X-ray imaging system according to a second embodiment of the present invention. BEST MODE FOR CARRYING OUT THE INVENTION
[0013] 以下、用語につ!、て説明する。 [0013] Hereinafter, terms will be explained.
放射線は、強い電離作用や蛍光作用を有する電磁波や粒子線のことで、 X線、 y 線、 j8線、 α線、陽子線、重陽子線その他の重荷電粒子線及び中性子線が挙げら れる。本発明においては、放射線として、電子線、 X線、 γ線が好ましぐ特に X線が 好ましい。  Radiation is an electromagnetic wave or particle beam that has a strong ionizing or fluorescent action, and includes X-ray, y-ray, j8-ray, α-ray, proton beam, deuteron beam and other heavy charged particle beam and neutron beam. . In the present invention, electron rays, X rays, and γ rays are preferred as radiation, and X rays are particularly preferred.
コンソールとは、操作者が力セッテと交信を行うための装置で、別体の表示装置や 操作装置が接続可能であってもよ 、し、表示装置や操作装置が一体であってもよ ヽ  The console is a device for the operator to communicate with the force set, and a separate display device or operation device can be connected, or the display device or operation device can be integrated.
[0014] 以下、図面を参照しながら本発明の実施形態について説明する。なお、本発明が これらの実施形態に限られな 、ことは、述べるまでもな 、。 Hereinafter, embodiments of the present invention will be described with reference to the drawings. Needless to say, the present invention is not limited to these embodiments.
発明の実施の形態欄の記載は、発明を実施するために発明者が最良と認識してい る形態を示すものであり、発明の範囲や、特許請求の範囲に用いられている用語を 一見、断定又は定義するような表現もあるが、これらは、あくまで、発明者が最良と認 識している形態を特定するための表現であり、発明の範囲や、特許請求の範囲に用 V、られて 、る用語を特定又は限定するものではな!/、。  The description in the embodiment column of the invention shows the form that the inventor recognizes as the best for carrying out the invention. At first glance, the terminology used in the scope of the invention and the claims There are also expressions that are asserted or defined, but these are only expressions that specify the form that the inventor recognizes as the best, and are used in the scope of the invention and in the claims. It is not intended to identify or limit the terms! /.
[0015] [第一の実施形態]  [0015] [First embodiment]
図 1〜図 5を参照しながら本発明に係る X線画像撮影システムの第一の実施形態に ついて説明する。なお、 X線は放射線の一種である。  A first embodiment of an X-ray imaging system according to the present invention will be described with reference to FIGS. X-rays are a type of radiation.
[0016] 図 1に示すように、第一の実施形態に係る X線画像撮影システム 1000は、病院内 で行われる X線画像撮影を想定したシステムであり、例えば、被写体に X線を照射す る X線撮影室 R1と、 X線技師が被写体に照射する X線の制御や、 X線を照射して取 得した X線画像の画像処理等を行う X線制御室 R2とに配置されるものである。  As shown in FIG. 1, an X-ray imaging system 1000 according to the first embodiment is a system that assumes X-ray imaging performed in a hospital. For example, X-ray imaging is performed on a subject. The X-ray room R1 and the X-ray room R2 that controls the X-rays irradiated by the X-ray engineer and processes the X-ray images obtained by irradiating the X-rays. Is.
[0017] X線制御室 R2には、コンソール 1が設けられている。このコンソール 1は、 X線画像 撮影システム全体を制御するようになっており、コンソール 1が X線画像撮影の制御 や取得した X線画像の画像処理の制御を行うようになっている。コンソール 1は、携帯 端末であってもよい。 [0017] A console 1 is provided in the X-ray control room R2. This console 1 controls the entire X-ray imaging system, and console 1 controls X-ray imaging. It controls image processing of acquired X-ray images. Console 1 may be a mobile terminal.
コンソール 1には、操作者が撮影準備指示や撮影指示、指示内容を入力する操作 入力部 2が接続されている。操作入力部 2としては、例えば、 X線照射要求スィッチや タツチパネノレ、マウス、キーボード、ジョイスティック等を用いることが可能であり、操作 者が操作入力部 2を介して、 X線管電圧や X線管電流、 X線照射時間等の X線撮影 条件、撮影タイミング、撮影部位、撮影方法等の X線撮影制御条件、画像処理条件、 画像出力条件、力セッテ選択情報、オーダ選択情報、被写体 ID等の指示内容がコ ンソール 1に入力される。  The console 1 is connected to an operation input unit 2 through which an operator inputs a shooting preparation instruction, a shooting instruction, and the content of the instruction. As the operation input unit 2, for example, an X-ray irradiation request switch, a touch panel, a mouse, a keyboard, a joystick, or the like can be used, and an operator inputs an X-ray tube voltage or an X-ray tube via the operation input unit 2. X-ray imaging conditions such as current and X-ray irradiation time, X-ray imaging control conditions such as imaging timing, imaging region, and imaging method, image processing conditions, image output conditions, force set selection information, order selection information, subject ID, etc. Instructions are entered into console 1.
更に、コンソール 1には、 X線画像などを表示する表示部 3が接続されており、コンソ ール 1を構成して 、る表示制御部 11により表示部 3の表示が制御される。表示部 3と しては、例えば、液晶モニタ、 CRT (Cathode Ray Tube)モニタ等のモニタ、電子べ ーパ、電子フィルム等を用いることができる。表示部 3には、 X線撮影条件や画像処 理条件等の文字及び X線画像が表示される。  Further, a display unit 3 for displaying an X-ray image or the like is connected to the console 1, and the display 1 of the display unit 3 is controlled by the display control unit 11 constituting the console 1. For example, a liquid crystal monitor, a monitor such as a CRT (Cathode Ray Tube) monitor, an electronic paper, an electronic film, or the like can be used as the display unit 3. The display unit 3 displays characters such as X-ray imaging conditions and image processing conditions, and X-ray images.
[0018] また、コンソール 1は、表示制御部 11、入力部 12、コンソール制御部 13、コンソ一 ル通信部 14、画像処理部 15、画像保存部 16、コンソール電源部 17、ネットワーク通 信部 18等を備えている。表示制御部 11、入力部 12、コンソール制御部 13、コンソ一 ル通信部 14、画像処理部 15、画像保存部 16、コンソール電源部 17、ネットワーク通 信部 18は、それぞれバスに接続しており、データ交換可能である。  [0018] The console 1 includes a display control unit 11, an input unit 12, a console control unit 13, a console communication unit 14, an image processing unit 15, an image storage unit 16, a console power supply unit 17, and a network communication unit 18. Etc. Display control unit 11, input unit 12, console control unit 13, console communication unit 14, image processing unit 15, image storage unit 16, console power supply unit 17, and network communication unit 18 are each connected to a bus. Data exchange is possible.
[0019] 入力部 12は、操作入力部 2からの指示内容を受信する。  The input unit 12 receives the instruction content from the operation input unit 2.
[0020] コンソール制御部 13は、入力部 12が操作入力部 2から受信した指示内容やネット ワーク通信部 18が HISZRIS 71から受信したオーダ情報に基づ!/、て撮影条件を決 定する。そしてコンソール制御部 13は、コンソール通信部 14が X線源 4と力セッテ 5と に撮影条件に関する撮影条件情報を送信し、 X線源 4と力セッテ 5とを制御して X線 画像撮影をする。また、コンソール制御部 13は、力セッテ 5からコンソール通信部 14 が受信した X線画像データを画像保存部 16に一時保存する。また、コンソール制御 部 13は、画像保存部 16に一時保存した X線画像データからサムネイル画像データ を画像処理部 15が作成するように制御する。表示制御部 11は、作成されたサムネィ ル画像データに基づいて、表示部 3がサムネイル画像を表示させる。そして、コンソ ール制御部 13は、画像処理部 15で X線画像データに入力部 12が受信した指示内 容ゃ HISZRIS71のオーダ情報に基づ 、た画像処理を行、、この画像処理された X線画像データを画像保存部 16に保存するように制御する。そして、コンソール制御 部 13は、画像処理部 15が画像処理した結果の X線画像データに基づいて、処理結 果のサムネイル画像を表示部 3が表示するように、表示制御部 11を制御する。更に、 コンソール制御部 13は、その後に入力部 12が操作入力部 2から受信した指示内容 に基づ!/ヽて、表示制御部 11に X線画像データの再画像処理を画像処理部 15に行 わせたり、その画像処理結果の表示を表示部 3が表示するように表示制御部 11を制 御したり、又、 X線画像データをネットワーク上の外部装置に転送、保存、表示する。 また、コンソール制御部 13は、力セッテ 5が送信するチャンネルと、他の機器がマイ クロ波で送信するチャンネルを管理する機能を有している。すなわち、コンソール制 御部 13は、力セッテ 5が所定のチャンネルの無線で送信する際に、他の機器が当該 チャンネルの無線で送信して混信することがないように制御する。例えば、コンソール 制御部 13は、コンソール通信部 14と通信ケーブルで接続された無線中継器 6を介し て、新しい機器が導入されたとき又は常時、無線中継器 6のアンテナ力も得られる無 線通信のチャンネル情報を取得し、他の機器がどのチャンネルを使用して 、るかを 確認して記憶するようになっている。そして、当該他の機器のチャンネルと力セッテ 5 で使用するチャンネルが同じとなってしまう場合には、コンソール制御部 13は、可能 であれば力セッテ 5のチャンネルを変更し、また可能であれば他の機器のチャンネル を変更するように制御する。また、ぞれぞれのチャンネルの変更が不可能である場合 には、コンソール制御部 13は、放射線 X線画像データの送信時等に、他の機器を使 用しな 、ように表示部 3が警告表示をするように表示制御部 11を制御する。 The console control unit 13 determines the imaging conditions based on the instruction content received by the input unit 12 from the operation input unit 2 and the order information received by the network communication unit 18 from the HISZRIS 71. Then, the console control unit 13 transmits the imaging condition information regarding the imaging conditions to the X-ray source 4 and the force set 5 by the console communication unit 14, and controls the X-ray source 4 and the force set 5 to perform X-ray imaging. To do. Further, the console control unit 13 temporarily stores the X-ray image data received by the console communication unit 14 from the force set 5 in the image storage unit 16. The console control unit 13 controls the image processing unit 15 to create thumbnail image data from the X-ray image data temporarily stored in the image storage unit 16. The display control unit 11 displays the created thumbnail. The display unit 3 displays thumbnail images based on the image data. Then, the console control unit 13 performs image processing based on the order information received by the input unit 12 in the X-ray image data in the image processing unit 15 based on the order information of the HISZRIS71, and the image processing is performed. The X-ray image data is controlled to be stored in the image storage unit 16. Then, the console control unit 13 controls the display control unit 11 so that the display unit 3 displays the thumbnail image of the processing result based on the X-ray image data obtained as a result of the image processing by the image processing unit 15. Further, the console control unit 13 then performs re-image processing of the X-ray image data to the display control unit 11 based on the instruction content received by the input unit 12 from the operation input unit 2 and then to the image processing unit 15. The display control unit 11 is controlled so that the display unit 3 displays the image processing result, and the X-ray image data is transferred, stored, and displayed to an external device on the network. In addition, the console control unit 13 has a function of managing channels transmitted by the force set 5 and channels transmitted by other devices using microwaves. In other words, the console control unit 13 performs control so that when the force set 5 transmits by radio of a predetermined channel, other devices do not transmit and interfere with each other by radio of the channel. For example, the console control unit 13 performs radio communication that can obtain the antenna power of the radio repeater 6 when a new device is introduced or always through the radio repeater 6 connected to the console communication unit 14 via a communication cable. Channel information is acquired, and the channel used by other devices is confirmed and stored. If the channel of the other device and the channel used in the force set 5 are the same, the console control unit 13 changes the channel of the force set 5 if possible, and if possible. Control to change the channel of other devices. In addition, when it is impossible to change each channel, the console control unit 13 does not use other devices when transmitting radiation X-ray image data. Controls the display control unit 11 to display a warning.
コンソール制御部 13としては、 CPU (Central Processing Unit)及び RAM (Random Access Memory)や ROM (Read Only Memory)等のメモリが搭載されているマザ一 ボードを適用することが可能である。  As the console control unit 13, it is possible to apply a mother board on which a CPU (Central Processing Unit), a RAM (Random Access Memory), a ROM (Read Only Memory) and other memories are mounted.
CPUは、 ROM又はハードディスクに記憶されているプログラムを読み出し、 RAM 上にプログラムを展開し、展開したプログラムに従ってコンソール 1の各部、 X線源 4、 力セッテ 5、外部装置を制御する。また、 CPUは、 ROM又はハードディスクに記憶さ れているシステムプログラムをはじめとする各種処理プログラムを読み出して RAM上 に展開し、後述する各種処理を実行する。 The CPU reads the program stored in the ROM or hard disk, expands the program on the RAM, and in accordance with the expanded program, each part of the console 1, the X-ray source 4, Force set 5, control external devices. In addition, the CPU reads various processing programs including system programs stored in the ROM or the hard disk, develops them on the RAM, and executes various processes described later.
RAMは、揮発性のメモリであり、コンソール制御部 13の CPUにより実行制御される 各種処理において、 ROM力 読み出されて CPUで実行可能な各種プログラム、入 力もしくは出力データ等を一時的に記憶するワークエリアを形成する。  The RAM is a volatile memory that temporarily stores various programs, input or output data, etc. that can be read and executed by the CPU in various processes controlled by the CPU of the console control unit 13. Form a work area.
ROMは、例えば、不揮発性のメモリであり、 CPUで実行されるシステムプログラム、 システムプログラムに対応する各種プログラムなどを記憶する。これらの各種プロダラ ムは、読取可能なプログラムコードの形態で格納され、 CPUは、当該プログラムコー ドに従った動作を逐次実行する。  The ROM is a non-volatile memory, for example, and stores a system program executed by the CPU, various programs corresponding to the system program, and the like. These various programs are stored in the form of readable program code, and the CPU sequentially executes operations according to the program code.
また、 ROMの代わりにハードディスクを用いてもよい。この場合、ハードディスクは、 CPUで実行されるシステムプログラムと各種アプリケーションプログラムを記憶する。 また、ハードディスクは、その一部もしくは全部をサーバ等の他の機器力 ネットヮー ク回線の伝送媒体を介してコンソール通信部 14から、本発明のプログラムなどの各 種アプリケーションプログラムを受信して記憶するようにしてもよい。更に、 CPUは、ネ ットワーク上に設けられたサーバのハードディスクなどの記憶装置力 本発明のプロ グラム等の各種アプリケーションプログラムを受信し、 RAM上に展開して、本発明の 処理などの各種処理をするようにしてもよ!、。  A hard disk may be used instead of the ROM. In this case, the hard disk stores a system program executed by the CPU and various application programs. In addition, the hard disk receives and stores various application programs such as the program of the present invention from the console communication unit 14 via a transmission medium of another device power network line such as a server, part or all of the hard disk. It may be. Further, the CPU receives a storage device such as a hard disk of a server provided on the network, and receives various application programs such as the program of the present invention, expands it on the RAM, and performs various processes such as the processing of the present invention. You can do it!
[0021] 表示制御部 11は、コンソール制御部 13の制御に基づいて、画像データや文字デ ータなどに基づいた画像や文字などが表示部 3に表示されるように制御する。表示制 御部 11には、グラフィックボード等を用いることができる。  The display control unit 11 controls the display unit 3 to display images, characters, and the like based on image data, character data, and the like based on the control of the console control unit 13. For the display control unit 11, a graphic board or the like can be used.
[0022] コンソール通信部 14は、 X線源 4及び無線中継器 6にそれぞれ通信ケーブルを介 して接続されている。コンソール通信部 14は、無線中継器 6を介して力セッテ 5と通信 可能である。詳細には、コンソール通信部 14は、指示内容に基づいた制御信号をァ ナログ通信又はデジタル通信により X線源 4及び力セッテ 5に送信可能である一方、 力セッテ 5からの X線画像データを受信可能である。  [0022] The console communication unit 14 is connected to the X-ray source 4 and the wireless repeater 6 via a communication cable. The console communication unit 14 can communicate with the force set 5 via the wireless repeater 6. Specifically, the console communication unit 14 can transmit a control signal based on the instruction content to the X-ray source 4 and the force set 5 by analog communication or digital communication, while transmitting X-ray image data from the force set 5. It can be received.
[0023] コンソール通信部 14は、力セッテ通信部 52と無線中継器 6との無線通信の通信状 態を検出する。無線通信の通信状態は、無線通信の受信電波強度の低下や無線通 信帯域でのノイズ量などで検出可能である。この場合、無線中継器 6で検出された力 セッテ通信部 52と無線中継器 6との間の無線通信の通信状態の情報を、無線中継 器 6がコンソール通信部 14に送信し、コンソール通信部 14が無線通信の通信状態 の情報を受信すると、コンソール制御部 13が無線通信の通信状態を検知する。 また、実行通信速度を検出することにより、コンソール制御部 13が無線通信の通信 状態を検出してもよい。この場合、実行通信速度を、無線中継器 6で検出しても良い し、また、コンソール通信部 14で検出しても良い。そして、実行通信速度の情報から コンソール制御部 13が無線通信の通信状態を検知する。 The console communication unit 14 detects a communication state of wireless communication between the force set communication unit 52 and the wireless repeater 6. The communication status of wireless communication is the decrease in received radio field strength of wireless communication or wireless communication. It can be detected by the amount of noise in the transmission band. In this case, the wireless repeater 6 transmits information on the communication state of the wireless communication between the force set communication unit 52 and the wireless repeater 6 detected by the wireless repeater 6 to the console communication unit 14, and the console communication unit When 14 receives information on the communication state of wireless communication, the console control unit 13 detects the communication state of wireless communication. Further, the console control unit 13 may detect the communication state of the wireless communication by detecting the execution communication speed. In this case, the execution communication speed may be detected by the wireless repeater 6 or may be detected by the console communication unit 14. Then, the console control unit 13 detects the communication state of the wireless communication from the information on the execution communication speed.
[0024] 力セッテ通信部 52と無線中継器 6との無線通信が不能な状態であるとコンソール制 御部 13が検出したとき、すなわち、無線通信が通信不能な状態とコンソール制御部 13が検出したとき、コンソール制御部 13は、表示部 3が通信不能な状態であることを 示す表示をするように表示制御部 11を制御する。  [0024] When the console control unit 13 detects that wireless communication between the force set communication unit 52 and the wireless repeater 6 is impossible, that is, the console control unit 13 detects that wireless communication is not possible. Then, the console control unit 13 controls the display control unit 11 so as to display that the display unit 3 is in a communication disabled state.
[0025] また、コンソール制御部 13がコンソール通信部 14が力セッテ 5から X線画像データ を受信中と検出したとき、すなわち、コンソール通信部 14が力セッテ 5から X線画像デ ータを受信中の場合、表示部 3に X線画像データを受信中であることを示す表示をさ せる力 表示部 3に X線画像データを受信中であることを示す表示をさせている時に 、無線通信が通信不能な状態とコンソール制御部 13が検知した場合、表示部 3に X 線画像データを受信中であることを示す表示を止めさせるようにコンソール制御部 13 は、表示制御部 11を制御する。  [0025] Further, when the console control unit 13 detects that the console communication unit 14 is receiving X-ray image data from the force set 5, that is, the console communication unit 14 receives X-ray image data from the force set 5. If the display unit 3 is in the middle, the power to display the X-ray image data being received on the display unit 3 is displayed. Console control unit 13 controls display control unit 11 so that display unit 3 stops displaying that X-ray image data is being received. .
[0026] また、コンソール制御部 13が力セッテ通信部 52と無線中継器 6との無線通信が不 良な状態であると検出したとき、すなわち、無線通信が通信不良な状態とコンソール 制御部 13が検出したとき、コンソール制御部 13は、表示部 3が通信不良状態である ことを示す表示をするように表示制御部 11を制御する。通信不良状態であることを示 す表示は、通信不良の状態である旨の表示でも良いし、通信速度や無線通信波の 強度 (電波強度ゃ受光強度など）の絶対値、相対値、レベルなどの表示でもよいし、 SZN比の絶対値、相対値、レベルなどの表示でもよいし、他の形態の表示のいず れであっても良い。  [0026] Further, when the console control unit 13 detects that the wireless communication between the force set communication unit 52 and the wireless repeater 6 is in a poor state, that is, the wireless communication is in a poor communication state and the console control unit 13 When this is detected, the console control unit 13 controls the display control unit 11 to display that the display unit 3 is in a communication failure state. The display indicating that the communication is poor may be a display indicating that the communication is poor, or the absolute value, relative value, level, etc. of the communication speed or the strength of the radio communication wave (such as the radio wave intensity or the received light intensity). May be displayed, an absolute value, a relative value, or a level of the SZN ratio may be displayed, or any other form of display may be used.
例えば、 Windows (登録商標）のタスクバーの通知領域にて、携帯電話の受信状態 を示す表示にならって、通信良好状態の表示をアンテナ記号とインジケータが 3本立 つている表示とし、通信不良状態の表示をその程度によって、アンテナ記号とインジ ケータが 2本又は 1本立っている表示とし、通信不能状態の表示をアンテナ記号とィ ンジケータが全く立っていない表示とする方法が挙げられる力 適宜、わかりやすい 表示方法を用いるとよい。 For example, in the notification area of the Windows (registered trademark) taskbar, the reception status of the mobile phone The indication of good communication is displayed with three antenna symbols and indicators, and the indication of poor communication is displayed with two or one antenna symbols and indicators depending on the degree of communication. In addition, it is possible to use a display method in which the antenna symbol and the indicator are not standing at all.
また、変形例として、コンソール通信部 14がデジタル信号力も無線送信用のアナ口 グ信号を生成し、無線受信したアナログ信号力 デジタル信号に変換するものであり 、無線中継器 6がコンソール通信部 14のアンテナであって、コンソール通信部 14か らの無線送信用のアナログ信号で無線送信し、無線受信したアナログ信号をコンソ ール通信部 14に送信するようにしてもよい。この場合、無線通信の通信状態を、コン ソール通信部 14が、無線通信の受信電波強度の低下や無線通信帯域でのノイズ量 などで検出可能である。この場合、コンソール通信部 14で検出された力セッテ通信 部 52と無線中継器 6との間の無線通信の通信状態の情報を、コンソール制御部 13 に伝達し、コンソール制御部 13が無線通信の通信状態を検知する。  As a modification, the console communication unit 14 generates an analog signal for wireless transmission and converts it into an analog signal force digital signal received wirelessly. The wireless repeater 6 is connected to the console communication unit 14. It is also possible to wirelessly transmit an analog signal for wireless transmission from the console communication unit 14 and transmit the wirelessly received analog signal to the console communication unit 14. In this case, the communication state of the wireless communication can be detected by the console communication unit 14 based on a decrease in received radio wave intensity of the wireless communication or a noise amount in the wireless communication band. In this case, the communication state information of the wireless communication between the force set communication unit 52 and the wireless repeater 6 detected by the console communication unit 14 is transmitted to the console control unit 13, and the console control unit 13 performs the wireless communication. Detect communication status.
なお、本実施形態では、コンソール制御部 13は、コンソール制御部 13は、力セッテ 5が所定のチャンネルの無線で送信する際に、他の機器が当該チャンネルの無線で 送信して混信することがな！ヽように、当該他の機器のチャンネルと力セッテ 5で使用す るチャンネルが同じとなってしまう場合には、コンソール制御部 13は、可能であれば 力セッテ 5のチャンネルを変更し、また可能であれば他の機器のチャンネルを変更す るように制御した上で、無線通信の通信状態を検知する。しかし、ぞれぞれのチャン ネルの変更が不可能である場合には、コンソール制御部 13は、放射線 X線画像デ ータの送信時等に、他の機器を使用しないように表示部 3が警告表示をするように表 示制御部 11を制御すると共に、その状態下での無線通信の状態を検知する。  In the present embodiment, the console control unit 13 allows the console control unit 13 to cause interference when other devices transmit by radio of the channel when the force set 5 transmits by radio of the predetermined channel. Yeah!ヽ If the channel of the other device and the channel used in force set 5 are the same, console control unit 13 can change the channel of force set 5 if possible. If so, control the other device's channel to be changed, and then detect the wireless communication state. However, if it is impossible to change each channel, the console control unit 13 prevents the display unit 3 from using other devices when transmitting radiation X-ray image data. The display control unit 11 is controlled so as to display a warning, and the state of wireless communication under the state is detected.
また、変更例として、コンソール制御部 13は、コンソール制御部 13は、力セッテ 5が 所定のチャンネルの無線で送信する際に、他の機器が当該チャンネルの無線で送 信して混信することがな 、ように制御せずに、単に所定チャンネルでの無線通信の 状態を検知するものが挙げられる。例えば、力セッテ 5が所定のチャンネルの無線で 送信する際に、他の機器が当該チャンネルの無線で送信しないことが明らかな場合 や、このような制御を設ける為のコストを削減した 、場合などである。 Further, as an example of change, when the console controller 13 transmits the force set 5 wirelessly on a predetermined channel, other devices may transmit and interfere with each other wirelessly on the channel. There is one that simply detects the state of wireless communication on a predetermined channel without performing such control. For example, when force set 5 transmits wirelessly on a predetermined channel, it is clear that other devices will not transmit wirelessly on that channel. Or the case where the cost for providing such control is reduced.
[0027] また、コンソール制御部 13は、このようにして、力セッテ通信部 52と無線中継器 6と の無線通信の通信状態が通信不能であると検知すると、 X線管 42から X線が照射さ れな 、ように X線インターロックを制御する。  [0027] In addition, when the console control unit 13 detects that the communication state of the wireless communication between the force set communication unit 52 and the wireless repeater 6 is impossible in this way, the X-ray tube 42 emits X-rays. The X-ray interlock is controlled so that it is not irradiated.
ここで、 X線インターロックとは、操作者が撮影指示を入力しても X線管 42から X線 が照射されないようにする制御のことである。 X線インターロックの具体例としては、例 えば、コンソール制御部 11からコンソール通信部 14を介して X線照射禁止信号を X 線源制御部 43に送信し、 X線照射禁止信号を受信した X線源制御部 43が X線照射 を禁止する方法や、操作者が操作入力部 2から撮影指示を入力しょうとしても操作入 力部 2が動かないようにする方法や、操作者が操作入力部 2から撮影指示を入力し ても入力部 12が受けないようにする方法や、コンソール通信部 14に X線照射信号を 送信することを禁止する方法などがあるが、これらに限らない。  Here, the X-ray interlock is a control that prevents X-rays from being irradiated from the X-ray tube 42 even when an operator inputs an imaging instruction. As a specific example of the X-ray interlock, for example, an X-ray irradiation prohibition signal is transmitted from the console control unit 11 to the X-ray source control unit 43 via the console communication unit 14, and an X-ray irradiation prohibition signal is received. The method that the radiation source control unit 43 prohibits X-ray irradiation, the method that prevents the operation input unit 2 from moving even if the operator tries to input a shooting instruction from the operation input unit 2, and the operator There are a method of preventing the input unit 12 from receiving an imaging instruction from 2 and a method of prohibiting the X-ray irradiation signal from being transmitted to the console communication unit 14, but not limited thereto.
[0028] コンソール通信部 14と X線源 4及び無線中継器 6を接続して 、る通信ケーブルは、 着脱可能である。通信ケーブルが接続されているときは、画像転送が高速に行える ので X線撮影による X線画像取得、 X線画像処理、 X線画像確認等をより短時間で行 うことが可能である。  [0028] A communication cable connecting the console communication unit 14, the X-ray source 4 and the wireless repeater 6 is detachable. When the communication cable is connected, image transfer can be performed at high speed, so X-ray image acquisition, X-ray image processing, X-ray image confirmation, etc. can be performed in a shorter time.
[0029] 画像処理部 15は、コンソール通信部 14が力セッテ 5から受信した X線画像データを 画像処理する。画像処理部 15では、指示内容に基づいて画像データの補正処理、 拡大圧縮処理、空間フィルタリング処理、リカーシブ処理、階調処理、散乱線補正処 理、グリッド補正処理、周波数強調処理、ダイナミックレンジ (DR)圧縮処理等の画像 処理が行われる。  The image processing unit 15 performs image processing on the X-ray image data received from the force set 5 by the console communication unit 14. The image processing unit 15 performs image data correction processing, enlargement compression processing, spatial filtering processing, recursive processing, gradation processing, scattered radiation correction processing, grid correction processing, frequency enhancement processing, dynamic range (DR) based on the instruction content. ) Image processing such as compression processing is performed.
[0030] 画像保存部 16は、 X線画像データを記憶する記憶装置を有しており、コンソール通 信部 14が力セッテ 5から受信した X線画像データの一時保存や、画像処理された X 線画像データの保存を行う。画像保存部 16としては、大容量かつ高速の記憶装置 であるハードディスク、 RAID (Redundant Array of Independent Disks)等のハードデ イスクアレー、シリコンディスク等を用いることが可能である。  [0030] The image storage unit 16 has a storage device for storing X-ray image data. The X-ray image data received by the console communication unit 14 from the force set 5 is temporarily stored, and the image processed X Save line image data. As the image storage unit 16, it is possible to use a hard disk that is a large-capacity and high-speed storage device, a hard disk array such as a RAID (Redundant Array of Independent Disks), a silicon disk, or the like.
[0031] コンソール電源部 17は、 AC電源等の外部電源（図示せず）、又は、ノ ッテリー、電 池等の内部電源（図示せず)から電力を供給されており、コンソール 1を構成する各 部に電力を供給している。 [0031] The console power supply unit 17 is supplied with power from an external power source (not shown) such as an AC power source or an internal power source (not shown) such as a knotter or battery, and constitutes the console 1. each Power is supplied to the department.
コンソール電源部 17の外部電源は、着脱可能である。コンソール電源部 17が外部 電源より電力を供給されるときは、充電の必要がないため長時間撮影を行うことが可 能である。  The external power supply of the console power supply unit 17 is detachable. When the console power supply 17 is supplied with power from an external power supply, it is not necessary to charge, so it is possible to shoot for a long time.
ネットワーク通信部 18は、 LAN (Local Area Network)によりコンソール 1と外部装 置との間で各種情報の通信を行うものである。外部装置としては、例えば、 HIS/RI S (Hospital Information bystem/ Raaioiogy Information System : ;)丙院内†¾ "報ンスアム Z放射線科情報システム)端末 71、イメージャ 72、画像処理装置 73、ビューヮ 74、 ファイルサーバ 75等を接続することが可能である。ネットワーク通信部 18は、 DICO M (Digital Imaging and Communications in Medicine)等所定のプロトコノレに従って X 線画像データを外部装置に出力する。  The network communication unit 18 communicates various types of information between the console 1 and an external device via a LAN (Local Area Network). As an external device, for example, HIS / RI S (Hospital Information by system / Raaioiogy Information Information System;;) 丙 院内 † ¾ "Sungsam Z Radiology Information System" terminal 71, imager 72, image processor 73, view ヮ 74, file It is possible to connect a server 75 etc. The network communication unit 18 outputs X-ray image data to an external device according to a predetermined protocol such as DICOM (Digital Imaging and Communications in Medicine).
HISZRIS端末 71は、 HISZRISから、被写体の情報や撮影部位及び撮影方法 などの情報を取得し、コンソール 1に提供する。イメージャ 72は、コンソール 1から出 力された X線画像データに基づいて X線画像をフィルムなどの画像記録媒体に記録 する。画像処理装置 73は、コンソール 1から出力された X線画像データの画像処理 や CAD (Computer Aided Diagnosis :コンピュータ診断支援）のための処理をして、フ アイルサーバ 75に保存する。ビューヮ 74は、コンソール 1から出力された X線画像デ ータに基づいて X線画像を表示する。ファイルサーバ 75は、処理画像処理された X 線画像データを保存するファイルサーバである。ネットワーク通信部 18は、 DICOM ( Digital Imaging and Communications in Medicine)等所定のフ—ロ卜コノレ【こ つて X 画像データを外部装置に出力する。  The HISZRIS terminal 71 obtains information on the subject, imaging region and imaging method from the HISZRIS and provides them to the console 1. The imager 72 records an X-ray image on an image recording medium such as a film based on the X-ray image data output from the console 1. The image processing device 73 performs processing for X-ray image data output from the console 1 and processing for CAD (Computer Aided Diagnosis), and stores it in the file server 75. View IV 74 displays an X-ray image based on the X-ray image data output from console 1. The file server 75 is a file server that stores X-ray image data that has undergone processed image processing. The network communication unit 18 outputs predetermined floor control such as DICOM (Digital Imaging and Communications in Medicine) X image data to an external device.
なお、本実施形態では、表示制御部 11とコンソール制御部 13とが別体に設けられ た例であるが、表示制御部とコンソール制御部とがー体であってもよい。例えば、コン ソール制御部として CPU及びメモリが搭載されて 、るマザ一ボードを用い、表示制御 部としてこのマザ一ボードに内蔵されたグラフィックサブシステムを用いることが挙げ られる。また、コンソール制御部 13が表示制御部を兼ねても良い。また、本実施形態 では、画像処理部 15は、コンソール制御部 13と別体である力 コンソール制御部 13 が画像処理部を兼ねても良 ヽ。 [0033] X線撮影室 Rlには、被写体に X線を照射する X線源 4と、被写体に照射された X線 を検出して X線画像データを取得する力セッテ 5とが配置されて 、る。 X線撮影室 R1 は、 X線源 4の X線が当該 X線撮影室 R1の外部に漏出しな ヽように X線遮蔽部材で 覆われた室となっている。通常、このような X線遮蔽部材は、例えば鉛板のような金属 製部材すなわち導電性部材であり、電波の透過を抑える性質や電波を反射する性 質を有している。 In the present embodiment, the display control unit 11 and the console control unit 13 are provided separately, but the display control unit and the console control unit may be separate bodies. For example, a mother board having a CPU and a memory mounted as a console control unit is used, and a graphic subsystem incorporated in the mother board is used as a display control unit. The console control unit 13 may also serve as a display control unit. In this embodiment, the image processing unit 15 may be a force console control unit 13 that is a separate body from the console control unit 13 and also serves as the image processing unit. [0033] In the X-ray imaging room Rl, an X-ray source 4 for irradiating the subject with X-rays and a force set 5 for detecting the X-rays applied to the subject and acquiring X-ray image data are arranged. RU The X-ray room R1 is a room covered with an X-ray shielding member so that X-rays from the X-ray source 4 do not leak outside the X-ray room R1. Usually, such an X-ray shielding member is a metal member such as a lead plate, that is, a conductive member, and has a property of suppressing transmission of radio waves and a property of reflecting radio waves.
本実施形態において、力セッテ 5は携帯可能なもので、 X線撮影室 R1の外部にも 持ち出せるようになつている。  In the present embodiment, the force set 5 is portable and can be taken out of the X-ray room R1.
更に、 X線撮影室 R1には、無線中継器 6が設置されている。無線中継器 6は、カセ ッテ 5との間で無線通信をする。また、無線中継器 6は、通信ケーブルを介してコンソ ール 1と通信する。そして、無線中継器 6を介して、力セッテ 5が取得した画像データ 力 Sコンソール丄に送信され、又、コンソール 1と力セッテ 5の間で、制御信号や各種情 報が通信される。このように、コンソール 1と無線中継器 6とがケーブルにより接続され ていて、 X線撮影室 R1に無線中継器 6を配置することにより、コンソール 1とは放射線 遮蔽部材で隔てられた X線撮影室 R1で力セッテ 5が用いられても、コンソール 1と力 セッテ 5とが良好な無線通信をすることができる。  Further, a radio repeater 6 is installed in the X-ray imaging room R1. The wireless repeater 6 performs wireless communication with the cassette 5. The wireless repeater 6 communicates with the console 1 via a communication cable. Then, the image data obtained by the force set 5 is transmitted to the console S via the wireless repeater 6, and control signals and various information are communicated between the console 1 and the force set 5. As described above, the console 1 and the wireless repeater 6 are connected by the cable, and the radio repeater 6 is arranged in the X-ray imaging room R1, so that the X-ray imaging separated from the console 1 by the radiation shielding member. Even if the force set 5 is used in the room R1, the console 1 and the force set 5 can perform good wireless communication.
[0034] 無線通信の方法としては、電波を用いて通信する方法、赤外線、可視光、紫外線 などの光を用いて通信する方法などがあるが、これらに限られない。 [0034] Examples of wireless communication methods include, but are not limited to, a method of communicating using radio waves, a method of communicating using light such as infrared rays, visible light, and ultraviolet rays.
電波を用いて通信する方法には、例えば、 60GHz帯を利用した 156Mbps全二重 (3 12Mbps)の無線 LAN規格 (ARIB STD- T74)や 19GHz帯を利用した高速 (25Mbps)通 信が可能な RCR STD-34規格に適合した無線 LANによる方法や、 18GHz帯や 19G Hz帯を利用した FWA (Fixed Wireless Access,固定無線アクセス）を用いた方法や 、 1. 4GHz帯や 2GHz帯や 2. 1GHz帯などを利用した次世代携帯電話による方法 、例えば 2. 4GHz帯や 5. 2GHz帯を用いた無線 LANの規格である IEEE802. 11 a、 802. l ib, 802. l lg等【こ適合した無線 LAN【こよる方法や、 2. 45GHz帯を禾 lj 用した Bluetoothなどの無線通信規格に基づく方法や、 UWB (Ultra Wide Band)すな わち超広帯域の電波を利用した通信方法や、 2. 4GHz帯や 5. 8GHz帯などを利用 した産業科学医療用周波数帯（ISM : Industrial, Scientific and Medical band)を利用 する方法や、その他の医療用又は産業用の通信帯域を利用する方法などの 1GHz 超の周波数の電波により送信する方法がある。そして、通信回路の低コスト化'小型 化の観点から 3 X 102GHz以下 (特に 3 X 10GHz以下）の周波数の電波が好ま ヽ また、 X線撮影に関する各種信号や情報の通信には、上記以外に、 1GHz以下の 周波数の電波を用いて通信する方法として、例えば 7 X 10MHz帯や 4 X 102MHz 帯を利用した特定小電力無線による方法、 PHSによる方法、 8 X 102MHz帯や 9 X 1 02MHz帯を利用した携帯電話による方法なども挙げられる。そして、アンテナの小型 化の観点から、 3 X 10MHz以上（特に、 1 X 102MHz以上）の周波数の電波が好ま しい。 For example, 156Mbps full-duplex (3 12Mbps) wireless LAN standard (ARIB STD-T74) using 60GHz band and high-speed (25Mbps) communication using 19GHz band are possible. A method using a wireless LAN compliant with the RCR STD-34 standard, a method using FWA (Fixed Wireless Access) using the 18 GHz band and 19 GHz band, 1. 4 GHz band, 2 GHz band and 2.1 GHz Next-generation mobile phone methods using bands such as IEEE802.11a, 802.l ib, 802.l lg, etc., which are wireless LAN standards using 2.4GHz and 5.2GHz bands, etc. Wireless LAN [This method, 2. A method based on a wireless communication standard such as Bluetooth using 45 GHz band, or UWB (Ultra Wide Band), that is, a communication method using ultra-wideband radio waves, 2 . Utilize industrial, scientific and medical band (ISM) using 4GHz band and 5.8GHz band. There is a method of transmitting by radio waves with a frequency exceeding 1 GHz, such as a method of using the communication band for medical or industrial use. From the viewpoint of cost reduction and miniaturization of communication circuits, radio waves with a frequency of 3 X 10 2 GHz or less (especially 3 X 10 GHz or less) are preferred. In addition to the above, methods for communication using radio waves with a frequency of 1 GHz or less include, for example, a method using a specific low power radio using a 7 X 10 MHz band or 4 X 10 2 MHz band, a method using PHS, an 8 X 10 2 MHz band, Examples include a method using a mobile phone using the 9 X 10 2 MHz band. From the viewpoint of antenna miniaturization, radio waves with a frequency of 3 X 10 MHz or higher (especially 1 X 10 2 MHz or higher) are preferred.
また、同一チャンネルを用いて他の機器が通信をして 、な 、ときは大容量の画像デ ータを高速に送信できる力 同一チャンネルを用いて他の機器が通信をしているとき は画像データを送信できな!/、ので、複数のチャンネル力 用いるチャンネルを選択 できる方法であることが好まし 、。  In addition, when other devices communicate with each other using the same channel, the ability to transmit large-capacity image data at high speed. When other devices communicate with each other using the same channel, Because it is not possible to send data! /, It is preferable to be able to select a channel that uses multiple channel powers.
光を用いて通信する方法としては、光無線 LANを用いた方法、 IrDA規格による近 赤外線を用いた方法などが挙げられるが、これに限らない。また、光無線 LANを用 いた方法として、有線 LANにリピータを接続し、光通信ハブを介して通信する方法な どがある。  Examples of the communication method using light include, but are not limited to, a method using an optical wireless LAN and a method using near infrared rays according to the IrDA standard. In addition, as a method using an optical wireless LAN, there is a method of connecting a repeater to a wired LAN and communicating via an optical communication hub.
[0035] また、無線中継器 6は、力セッテ 5の充電器の機能と、力セッテ 5の未使用時におけ るホルダの機能とを具備して 、ることが好ま 、。  [0035] Further, it is preferable that the wireless repeater 6 has a function of a charger of the force set 5 and a function of a holder when the force set 5 is not used.
例えば、無線中継器 6にはコネクタが備えられており、このコネクタと力セッテ 5とが 接続されると力セッテ 5の内部電源 51が充電される。無線中継器 6は、力セッテ 5の着 脱が容易なように形成されていることが好ましい。また、無線中継器 6は、力セッテ 5を 充電しながら保持する形状であることが好ましぐこれにより、力セッテ 5が未使用時に おけるホルダとして機能しつつ、充電器としても機能することが好ま 、。  For example, the wireless repeater 6 is provided with a connector, and when this connector and the force set 5 are connected, the internal power source 51 of the force set 5 is charged. The wireless repeater 6 is preferably formed so that the force set 5 can be easily attached and detached. In addition, it is preferable that the wireless repeater 6 has a shape that holds the force set 5 while being charged, so that the force set 5 can function as a charger while functioning as a holder when not in use. Favored ,.
[0036] X線源 4には、高圧電圧を発生する高圧発生源 41及び高圧発生源 41により高圧 電圧が印加されると X線を発生する X線管 42が、配設されている。 X線管 42の X線照 射口には、 X線照射範囲を調整する X線絞り装置（図示せず)が設けられている。 X 線絞り装置は、コンソール力 の制御信号に従って X線照射方向を制御するので、 X 線照射範囲が撮影領域に応じて調整される。更に、 X線源 4には、 X線源制御部 43 が配設されており、高圧発生源 41及び X線管 42には、 X線源制御部 43がそれぞれ 接続されている。 X線源制御部 43は、コンソール通信部 14から送信された制御信号 に基づいて、 X線源 4の各部を駆動制御する。すなわち、 X線源制御部 43は、高圧 発生源 41及び X線管 42を制御する。 The X-ray source 4 is provided with a high-voltage generation source 41 that generates a high-voltage and an X-ray tube 42 that generates X-rays when a high-voltage is applied by the high-voltage generation source 41. An X-ray diaphragm device (not shown) for adjusting the X-ray irradiation range is provided at the X-ray irradiation port of the X-ray tube 42. X Since the X-ray irradiation device controls the X-ray irradiation direction according to the console force control signal, the X-ray irradiation range is adjusted according to the imaging region. Further, the X-ray source 4 is provided with an X-ray source control unit 43, and the X-ray source control unit 43 is connected to the high-pressure generation source 41 and the X-ray tube 42, respectively. The X-ray source control unit 43 drives and controls each unit of the X-ray source 4 based on the control signal transmitted from the console communication unit 14. That is, the X-ray source control unit 43 controls the high pressure generation source 41 and the X-ray tube 42.
力セッテは、図 2に示すように筐体 55を備えており、筐体 55により内部が保護され て携帯可能なものである。筐体 55には、アルミニウム、マグネシウムのような軽金属が 用いられている。筐体 55に軽金属を用いたことにより、筐体 55の強度を保持すること ができるようになつている。  The force set includes a housing 55 as shown in FIG. 2, and the inside is protected by the housing 55 and is portable. The casing 55 is made of a light metal such as aluminum or magnesium. By using light metal for the housing 55, the strength of the housing 55 can be maintained.
なお、 X線撮影前に、被写体の所望の位置 ·向きで透過した X線を撮影するよう〖こ 操作者により力セッテ 5と被写体の位置と向きが調整されて配置される。（場合により、 X線源 6の位置と向きも調整されて配置される。）その後、コンソール 1からの指示で X 線源 4が X線を発生させる。すると、力セッテ 5には、 X線源 4から所望の位置'向きの 被写体を透過した X線が入射する。  Before the X-ray imaging, the force set 5 and the position and orientation of the subject are adjusted and arranged by the operator so that X-rays transmitted at the desired position and orientation of the subject are photographed. (In some cases, the position and orientation of the X-ray source 6 are also adjusted and arranged.) Thereafter, the X-ray source 4 generates X-rays according to instructions from the console 1. Then, X-rays that have passed through the subject in the desired position 'are incident on the force set 5 from the X-ray source 4.
力セッテ 5には、内部電源 51、力セッテ通信部 52、力セッテ制御部 53、パネル 54 が配設されている。内部電源 51、力セッテ通信部 52、力セッテ制御部 53、パネル 54 は、それぞれ力セッテ 5内のバスに接続されている。  The force set 5 is provided with an internal power supply 51, a force set communication unit 52, a force set control unit 53, and a panel 54. The internal power supply 51, the force set communication unit 52, the force set control unit 53, and the panel 54 are each connected to a bus in the force set 5.
また、力セッテ 5の電源は、力セッテ 5と電力線を介して接続された電源ユニットや交 流電源など外部力 電力を供給する外部電源でも良いが、力セッテ 5に設けられた内 部電源 51が取り回し易く好ましい。また、力セッテ 5に設けられた内部電源 51として、 力セッテ 5に外接して設けられた電源ユニットでも良いが、力セッテ 5内に設けられた 内部電源 51である事が好ましい。  The power source of the force set 5 may be an external power source that supplies external force power such as a power unit connected to the force set 5 via a power line or an AC power source, but an internal power source provided in the force set 5 51 Is preferable because it is easy to handle. The internal power supply 51 provided in the force set 5 may be a power supply unit provided externally to the force set 5, but is preferably the internal power supply 51 provided in the force set 5.
力セッテ 5は、電力を供給する内部電源 51を有する場合、電力の供給状態が異な る複数の電力供給の状態を有し、適切なタイミングで力セッテの電力供給の状態を変 えることが好ましい。このような電力の供給状態としては、例えば、撮影可能状態と、 撮影可能状態より電力消費の低い状態を有することが好ましぐ特に、撮影可能状態 より電力消費の低い状態として、 1又は複数の撮影待機モード制御下の状態と、更に 消費電力の低いスリープモード制御下の状態を有することが好ましい。 なお、撮影動作とは、放射線撮影により放射線画像データを得るのに必要な動作 のことで、例えば、実施形態で示すパネル 54であれば、パネル 54の初期化、放射線 照射によって生成された電気エネルギーの蓄積、電気信号の読み取り、及び、画像 データ化の各動作が該当する。 When the force set 5 has an internal power supply 51 for supplying power, it is preferable to have a plurality of power supply states with different power supply states and to change the power supply state of the force setter at an appropriate timing. . As such a power supply state, it is preferable to have, for example, a shootable state and a state of lower power consumption than the shootable state. The state under shooting standby mode control, and It is preferable to have a state under sleep mode control with low power consumption. The imaging operation is an operation necessary for obtaining radiographic image data by radiography. For example, in the case of the panel 54 shown in the embodiment, initialization of the panel 54 and electrical energy generated by radiation irradiation are performed. These operations are storage of image data, reading of electrical signals, and image data conversion.
そして、撮影可能状態とは、直ちにこの撮影動作により放射線画像データを得るこ とができる状態のことである。  The radiographable state is a state in which radiation image data can be obtained immediately by this radiographing operation.
[0038] 内部電源 51は、力セッテ 5内に配設された各部に電力を供給する。内部電源 51に は、充電可能でかつ撮影時に消費する電力に対応可能なコンデンサが設けられて いる。コンデンサとしては、電解二重層コンデンサを適用することが可能である。また 、内部電源 51としては、電池交換が必要なマンガン電池、ニッケル ·カドミウム電池、 水銀電池、鉛電池などの一次電池や、充電可能な二次電池を適用することが可能で ある。 The internal power supply 51 supplies power to each unit arranged in the force set 5. The internal power supply 51 is provided with a capacitor that can be charged and can handle the power consumed during photographing. As the capacitor, an electrolytic double layer capacitor can be applied. As the internal power source 51, it is possible to apply a primary battery such as a manganese battery, a nickel-cadmium battery, a mercury battery, or a lead battery that requires battery replacement, or a rechargeable secondary battery.
内部電源 51の容量は、撮影効率の観点から、最大サイズの X線画像を連続して撮 影可能な枚数で換算して 4枚以上 (特に 7枚以上)であることが好ま U、。  From the viewpoint of imaging efficiency, the capacity of the internal power supply 51 is preferably 4 or more (especially 7 or more) when converted to the maximum number of X-ray images that can be taken continuously.
また、内部電源 51の容量は、小型化 ·軽量化'低コストィ匕の観点から、最大サイズ の X線画像を連続して撮影可能な枚数で換算して 100枚以下 (特に 50枚以下)であ ることが好ましい。  In addition, the capacity of the internal power supply 51 is 100 or less (especially 50 or less) when converted to the maximum number of X-ray images that can be taken continuously from the viewpoint of miniaturization and weight reduction and low cost. It is preferable that it exists.
[0039] 力セッテ通信部 52は、無線中継器 6を介してコンソール通信部 14と無線通信が可 能なように構成されており、力セッテ通信部 52とコンソール通信部 14との間で信号を 送受信したり、力セッテ通信部 52からコンソール通信部 14に X線画像データを送信 したりすることが可能である。  [0039] The force set communication unit 52 is configured to be able to wirelessly communicate with the console communication unit 14 via the wireless repeater 6, and a signal is transmitted between the force set communication unit 52 and the console communication unit 14. The X-ray image data can be transmitted from the force set communication unit 52 to the console communication unit 14.
[0040] 力セッテ制御部 53は、力セッテ通信部 52が受信した制御信号に基づ 、て、カセッ テ 5に配設された各部を制御する。  The force set control unit 53 controls each unit disposed in the cassette 5 based on the control signal received by the force set communication unit 52.
[0041] パネル 54は、被写体を透過した X線に基づ 、て X線画像データを出力する。また、 本実施形態のパネル 5は、間接型フラットパネルディテクタ（FPD : Flat Panel Detecto r)である。  [0041] The panel 54 outputs X-ray image data based on the X-rays transmitted through the subject. Further, the panel 5 of the present embodiment is an indirect flat panel detector (FPD).
[0042] 図 2に力セッテ 5の概略構成を示す斜視図を、図 3にパネル 54を中心としたカセッ テ 5の断面図を示す。 [0042] Fig. 2 is a perspective view showing a schematic configuration of the force cassette 5, and Fig. 3 is a cassette centered on the panel 54. A cross-sectional view of TE 5 is shown.
なお、本実施形態では、図 2及び図 3に示した例を説明するが、これに限定されず 、シンチレータの厚さや種類が異なるものや、撮像領域の面積であるパネルの面積 が異なるものを用いることも適用可能である。シンチレータの厚さが厚いほど感度が 高くなり、シンチレータの厚さが薄いほど空間分解能が高くなる。また、シンチレータ の種類によって分光感度が異なる。  In the present embodiment, the examples shown in FIGS. 2 and 3 will be described. However, the present invention is not limited to this example, and the scintillator has a different thickness or type or a different panel area that is the area of the imaging region. It is also applicable to use. The thicker the scintillator, the higher the sensitivity, and the thinner the scintillator, the higher the spatial resolution. Spectral sensitivity varies depending on the type of scintillator.
[0043] パネル 54には、被写体を透過した X線を検出し、検出した X線を可視領域の蛍光（ 以下「可視光」と称す）に変換するシンチレータ 541が層状に設けられている。 The panel 54 is provided with a scintillator 541 that detects X-rays transmitted through the subject and converts the detected X-rays into fluorescence in the visible region (hereinafter referred to as “visible light”) in layers.
シンチレータ 541は、蛍光体を主たる成分としている。シンチレータ 541は、照射さ れた X線により蛍光体の母体物質が励起（吸収）し、その再結合エネルギーにより可 視光を発光する層である。この蛍光体としては、例えば、 CaWO、 CdWO等の母体  The scintillator 541 includes a phosphor as a main component. The scintillator 541 is a layer that emits visible light by the recombination energy when the host substance of the phosphor is excited (absorbed) by the irradiated X-rays. As this phosphor, for example, a matrix such as CaWO, CdWO, etc.
4 4 物質により蛍光を発光するものや、 CsI :Tl、 ZnS :Ag等の母体物質内に付加された 発光中心物質により蛍光を発光するものなどを用いることが可能である。  It is possible to use a substance that emits fluorescence by a substance or a substance that emits fluorescence by an emission center substance added in a base substance such as CsI: Tl or ZnS: Ag.
[0044] シンチレータ 541の上層には、保護層が設けられている。保護層は、シンチレータ 5 41を保護するもので、シンチレータ 541の上部及び辺縁を完全に覆っている。保護 層としては、シンチレータ 541の防湿保護の効果を有するものであればいずれの材 料を用いてもよい。そして、シンチレータ 541として、吸湿性を有する蛍光体 (特に、 アルカリハライド、更に、アルカリハライドからなる柱状結晶蛍光体）が用いられる場合 、例えば USP 6469305号において開示された、 CVD法によって形成されたポリパ ラキシリレン製有機膜や、ポリシラザン、ポリシロキサザンなどのシラザン又はシロキサ ザンタイプのポリマー化合物を含むポリマーから形成される有機膜や、プラズマ重合 法によって形成された有機膜などの防湿性有機膜を用いることが好ま ヽ。  A protective layer is provided above the scintillator 541. The protective layer protects the scintillator 541 and completely covers the upper part and the edge of the scintillator 541. As the protective layer, any material may be used as long as it has an effect of protecting the scintillator 541 from moisture. In the case where a phosphor having hygroscopicity (in particular, a columnar crystal phosphor made of alkali halide and further alkali halide) is used as the scintillator 541, for example, a polycrystal formed by the CVD method disclosed in US Pat. No. 6,469,305 is used. It is possible to use organic films made of laxylylene, organic films formed from polymers containing silazane or siloxazane type polymer compounds such as polysilazane, polysiloxazan, or organic films formed by plasma polymerization. I like it.
[0045] シンチレータ 541の下層には、アモルファスシリコンにより形成された光検出器 542 が積層して延在しており、この光検出器 542によりシンチレータ 541から発光する可 視光が電気エネルギーに変換されて出力される。  A photodetector 542 formed of amorphous silicon is laminated and extends under the scintillator 541, and the visible light emitted from the scintillator 541 is converted into electric energy by the photodetector 542. Is output.
そして、パネル 54は、 X線画像による診断の診断性の観点から、 1000 X 1000画 素以上（特に 2000 X 2000画素以上）の画素で構成されて!ヽることが好まし!/、。 また、パネル 54は、人の視認限界と X線画像の画像処理速度の観点から、 1万 X 1 万画素以下（特に 6000 X 6000画素以下）の画素で構成されて!ヽることが好まし!/ヽ。 また、パネル 54の撮影領域のサイズは、 X線画像による診断の診断性の観点から、 10cm X 10cm以上（特に、 20cm X 20cm以上）の面積であることが好まし!/、。 The panel 54 is preferably composed of pixels of 1000 X 1000 pixels or more (especially 2000 X 2000 pixels or more) from the viewpoint of diagnostic performance of X-ray images! In addition, the panel 54 has 10,000 X 1 from the viewpoint of human visibility limit and X-ray image processing speed. It is preferred to be composed of pixels of 10,000 pixels or less (especially 6000 x 6000 pixels or less)! In addition, the size of the imaging area of the panel 54 is preferably 10 cm X 10 cm or more (especially, 20 cm X 20 cm or more) from the viewpoint of diagnostic properties by X-ray images!
また、パネル 54の撮影領域のサイズは、力セッテとしての取り扱いやすさの観点か ら、 70cm X 70cm以下（特に 50cm X 50cm以下）の面積であることが好まし!/、。 また、パネル 54の一画素のサイズは、 X線被爆量低減の観点力も 40 m X 40 m以上（特に 70 m X 70 m以上）であることが好まし!/、。  In addition, from the viewpoint of ease of handling as a force set, the size of the shooting area of the panel 54 is preferably an area of 70 cm x 70 cm or less (especially 50 cm x 50 cm or less)! In addition, the size of one pixel of the panel 54 is preferably 40 m X 40 m or more (especially 70 m X 70 m or more) from the viewpoint of reducing X-ray exposure!
また、パネル 54の一画素のサイズは、 X線画像による診断の診断性の観点から 20 0 m X 200 m以下（特に 160 m X 160 m以下）であることが好まし!/ヽ。  In addition, the size of one pixel of the panel 54 is preferably 200 m x 200 m or less (especially 160 m x 160 m or less) from the viewpoint of the diagnostic property of the X-ray image!
本実施形態では、パネル 54が 4096 X 3072の画素カゝら構成されており、撮影領域 の面積力 S430mm X 320mmであり、 1画素のサイズが 105 m X 105 μ mである。  In the present embodiment, the panel 54 is composed of 4096 × 3072 pixel covers, the area power of the imaging region is S430 mm × 320 mm, and the size of one pixel is 105 m × 105 μm.
[0046] ここで、光検出器 542を中心とした回路構成について説明する。 Here, a circuit configuration centering on the photodetector 542 will be described.
[0047] 図 4に示すように、光検出器 542には、照射された X線の強度に応じて蓄積された 電気工ネルギーを読み出すための収集電極 5421が二次元配設されている。この収 集電極 5421には、コンデンサ 5424の一方の電極とされて、電気エネルギーがコン デンサ 5424に蓄えられるようになつている。ここで、 1つの収集電極 5421は、 X線画 像データの 1画素に対応するものである。 [0047] As shown in FIG. 4, the photodetector 542 is two-dimensionally provided with a collection electrode 5421 for reading out the electric energy stored in accordance with the intensity of the irradiated X-rays. The collecting electrode 5421 is one electrode of a capacitor 5424 so that electric energy can be stored in the capacitor 5424. Here, one collecting electrode 5421 corresponds to one pixel of X-ray image data.
[0048] 互いに隣接する収集電極 5421の間には、走査線 5422と信号線 5423とが配設さ れている。走査線 5422と信号線 5423とは、直交している。 A scanning line 5422 and a signal line 5423 are disposed between the collecting electrodes 5421 adjacent to each other. The scanning line 5422 and the signal line 5423 are orthogonal to each other.
[0049] コンデンサ 5424には、電気エネルギーの蓄電及び読み取りを制御するスィッチン グ薄膜トランジスタ 5425 (TFT: Thin Film Transistor,以下トランジスタと称す）が接 続されている。トランジスタ 5425は、ドレイン電極あるいはソース電極が収集電極 54 21〖こ接続されるととも〖こ、ゲート電極は、走査線 5422に接続される。ドレイン電極が 走査線 5422に接続されるときには、ソース電極が信号線 5423に接続され、ソース 電極が収集電極 5421に接続されるときには、ドレイン電極が信号線 5423に接続さ れる。また、パネル 21では、信号線 5423〖こは、例えばドレイン電極が接続された初 期化用のトランジスタ 5427が設けられている。このトランジスタ 5427のソース電極は 、接地されている。また、ゲート電極は、リセット線 5426と接続される。 なお、トランジスタ 5425とトランジスタ 5427は、シリコン積層構造あるいは有機半導 体で構成されて ヽることが好まし 、。 [0049] To the capacitor 5424, a switching thin film transistor 5425 (TFT: Thin Film Transistor, hereinafter referred to as a transistor) for controlling storage and reading of electric energy is connected. The transistor 5425 has a drain electrode or a source electrode connected to the collecting electrode 54 21, and a gate electrode connected to the scanning line 5422. When the drain electrode is connected to the scanning line 5422, the source electrode is connected to the signal line 5423, and when the source electrode is connected to the collection electrode 5421, the drain electrode is connected to the signal line 5423. In the panel 21, the signal line 5423 is provided with an initialization transistor 5427 to which, for example, a drain electrode is connected. The source electrode of the transistor 5427 is grounded. The gate electrode is connected to the reset line 5426. Note that the transistor 5425 and the transistor 5427 are preferably formed using a silicon stacked structure or an organic semiconductor.
[0050] また、走査駆動回路 543には、走査駆動回路 543からリセット信号 RTが送信される リセット線 5426が、信号線 5423と直交して接続されて 、る。 Further, a reset line 5426 to which a reset signal RT is transmitted from the scan drive circuit 543 is connected to the scan drive circuit 543 at right angles to the signal line 5423.
リセット線 5426には、リセット信号 RTによりオン状態となる初期化用トランジスタ 54 27のゲート電極が接続されている。初期化用トランジスタ 5427には、ゲート電極がリ セット線 5426に接続されているとともに、ドレイン電極が信号線 5423と接続され、ソ ース電極が接地されている。ソース電極が信号線 5423に接続されるときには、ドレイ ン電極が接地されている。  The reset line 5426 is connected to the gate electrode of the initialization transistor 5427 that is turned on by the reset signal RT. The initialization transistor 5427 has a gate electrode connected to the reset line 5426, a drain electrode connected to the signal line 5423, and a source electrode grounded. When the source electrode is connected to the signal line 5423, the drain electrode is grounded.
走査駆動回路 543がリセット信号 RTをリセット線 5426を介して初期化用トランジス タ 5427に供給して初期化用トランジスタ 5427をオン状態とするとともに、走査駆動 回路 543が走査線 5422を介してトランジスタ 5425に読み出し信号 RSを供給してト ランジスタ 5425をオン状態とすると、コンデンサ 5424に蓄積された電気エネルギー 力 Sトランジスタ 5425を介して光検出器 542外に放出される。即ち、光検出器 542から 放出された電気エネルギーが信号線 5423及び初期化用トランジスタ 5427を介して グランド電極に放出される。以下、リセット信号 RTが供給されてコンデンサ 5424に蓄 積された電気工ネルギ一が光検出器 542外に放出されることを、光検出器 542のリ セット (初期化)と称する。  The scan drive circuit 543 supplies the reset signal RT to the initialization transistor 5427 via the reset line 5426 to turn on the initialization transistor 5427, and the scan drive circuit 543 turns on the transistor 5425 via the scan line 5422. When the transistor 5425 is turned on by supplying the read signal RS to the transistor 5425, the electric energy force stored in the capacitor 5424 is discharged to the outside of the photodetector 542 through the S transistor 5425. That is, the electric energy released from the photodetector 542 is released to the ground electrode through the signal line 5423 and the initialization transistor 5427. Hereinafter, the release of the electrical energy stored in the capacitor 5424 to the outside of the photodetector 542 when the reset signal RT is supplied is referred to as reset (initialization) of the photodetector 542.
また、走査線 5422には、走査線 5422に読み出し信号 RSを供給する走査駆動回 路 543が接続されている。読み出し信号 RSが供給された走査線 5422に接続されて いるトランジスタ 5425は、オン状態となり、トランジスタ 5425と接続するコンデンサ 54 24に蓄積された電気エネルギーを読み出して信号線 5423に供給する。すなわち、 走査駆動回路 543は、トランジスタ 5425を駆動することで、 X線画像データの画素毎 の信号を生成することができる。  In addition, a scanning drive circuit 543 that supplies a readout signal RS to the scanning line 5422 is connected to the scanning line 5422. The transistor 5425 connected to the scan line 5422 to which the read signal RS is supplied is turned on, and the electric energy accumulated in the capacitor 5424 connected to the transistor 5425 is read and supplied to the signal line 5423. In other words, the scan driving circuit 543 can generate a signal for each pixel of the X-ray image data by driving the transistor 5425.
[0051] 信号線 5423には、信号読取回路 544が接続されている。この信号読取回路 544 には、コンデンサ 5424に蓄電されて力 信号線 5423に読み出された電気工ネルギ 一が供給される。信号読取回路 544には、信号読取回路 544に供給された電気エネ ルギー量に比例する電圧信号 SVを AZD変換器 5442に供給する信号変換器 544 1と、信号変換器 5441からの電圧信号 SVをデジタル信号に変換してデータ変換部 545に供給する AZD変翻 5442とが設けられている。 A signal reading circuit 544 is connected to the signal line 5423. This signal reading circuit 544 is supplied with the electrical energy stored in the capacitor 5424 and read out to the force signal line 5423. The signal reading circuit 544 includes a signal converter 544 that supplies a voltage signal SV proportional to the amount of electrical energy supplied to the signal reading circuit 544 to the AZD converter 5442. 1 and an AZD conversion 5442 that converts the voltage signal SV from the signal converter 5441 into a digital signal and supplies the digital signal to the data conversion unit 545.
[0052] 信号読取回路 544には、データ変換部 545が接続されている。このデータ変換部 5 45は、信号読取回路 544から供給されたデジタル信号に基づ 、て X線画像データを 生成する。 A data conversion unit 545 is connected to the signal reading circuit 544. The data converter 545 generates X-ray image data based on the digital signal supplied from the signal reading circuit 544.
[0053] 高分解能の画像データが必要でな 、ときや画像データを速く取得した 、ときには、 操作者が選択した撮影方法に応じて、コンソール制御部 13は、受信した間引き、画 素平均、領域抽出などの制御信号を力セッテ制御部 53に送信する。力セッテ制御部 53は、受信した間引き、画素平均、領域抽出などの制御信号に応じて、以下の間引 き、画素平均、領域抽出などを実行する。  [0053] When high-resolution image data is not necessary or when the image data is acquired quickly, the console control unit 13 sometimes receives the thinning-out, pixel average, region, and the like depending on the imaging method selected by the operator. A control signal such as extraction is transmitted to the force setting control unit 53. The force setting control unit 53 executes the following thinning, pixel averaging, region extraction, and the like according to the received control signals such as thinning, pixel averaging, region extraction, and the like.
間引きは、奇数列又は偶数列のみ読み出すことにより、読み出す画素数を全画素 数の 1Z4に間引いたり、同様にして 1Z9、 1Z16などに間引いたりすることにより行 われる。なお、間引きの方法は、この方法に限られるものではない。  Thinning is performed by reading out only odd-numbered columns or even-numbered columns and thinning out the number of pixels to be read out to 1Z4 of the total number of pixels, or by thinning out to 1Z9, 1Z16, etc. in the same way. Note that the thinning method is not limited to this method.
また、画素平均は、同時に複数の走査線 5422を駆動し、同じ列方向の 2画素のァ ナログ加算を行うことにより算出することが可能である。画素平均は、 2画素の加算に より算出することに限らず、列信号配線方向の複数画素のアナログ加算を行うことに より容易に得ることができる。更に、行方向の加算については、 AZD変換出力後に 隣り合う画素をデジタル加算することにより、上述のアナログ加算と合わせて、 2 X 2 等の正方形画素の加算値を得ることができる。これらによって、照射された X線を無 駄にすることなぐ高速にデータを読み出すことが可能である。  The pixel average can be calculated by simultaneously driving a plurality of scanning lines 5422 and performing analog addition of two pixels in the same column direction. The pixel average is not limited to being calculated by adding two pixels, but can be easily obtained by performing analog addition of a plurality of pixels in the column signal wiring direction. Furthermore, with respect to the addition in the row direction, by adding the adjacent pixels after the AZD conversion output, the addition value of square pixels such as 2 X 2 can be obtained in combination with the above-described analog addition. As a result, it is possible to read data at high speed without making the irradiated X-rays useless.
また、領域抽出は、画像データの取込領域を制限する手段を有している。この手段 は、撮影方法の指示内容など力 必要な画像データの取得領域を特定し、この特定 された取得領域に基づいて力セッテ制御部 53が走査駆動回路 543のデータ取込範 囲を変更し、この変更した取込範囲をパネル 54が駆動するものである。  The area extraction has means for limiting the image data capture area. This means specifies an acquisition area of image data that requires force such as the instruction content of the imaging method, and the force setting control unit 53 changes the data acquisition range of the scanning drive circuit 543 based on the specified acquisition area. The panel 54 drives the changed capture range.
[0054] データ変換部 545には、メモリ 546が接続されている。このメモリ 546には、データ 変換部 545により生成された X線画像データが保存される。また、メモリ 546〖こは、予 めゲイン補正用データが保存されている。 A memory 546 is connected to the data conversion unit 545. In this memory 546, the X-ray image data generated by the data conversion unit 545 is stored. Further, the memory 546 memory stores gain correction data in advance.
メモリ 546は、 RAM (Random Access Memory)及び不揮発性メモリにより構成され ている。このメモリ 546は、データ変換部 545により逐次生成された X線画像データを RAMに逐次書き込みをした後に不揮発性メモリに一括書き込みすることができる。 不揮発性メモリは、 EEPROM、フラッシュメモリ等のメモリ部品 2つ以上により構成さ れており、このメモリ部品の一方を消去している間に他方に書き込みをすることができ る。 The memory 546 is composed of RAM (Random Access Memory) and nonvolatile memory. ing. The memory 546 can batch write the X-ray image data sequentially generated by the data conversion unit 545 to the nonvolatile memory after sequentially writing to the RAM. Non-volatile memory is composed of two or more memory parts such as EEPROM and flash memory, and one of the memory parts can be written while the other is being erased.
[0055] このように、力セッテ 5は、 X線画像データを一時的に保存するために、 X線画像デ ータを一時的に記憶するメモリ 546を備えて 、るので、取得した X線画像データを一 且メモリ 546に保存でき、通信不良や通信不能な状態であっても、通信状態が良くな るまで X線撮影を遅らせる必要がなぐそのメモリ 546に保存した X線画像データを、 力セッテ 5とコンソール 1との間の通信状態に応じた通信速度で、力セッテ 5からコンソ ール 1に送信することが可能である。なお、メモリ 546の容量は、撮影の効率性の観 点から、最大データサイズの画像の保存できる画像数で換算して 4以上 (特に 10以 上）が好ましい。また、メモリ 546の容量は、低コストィ匕の観点から、最大データサイズ の画像の保存できる画像数で換算して 1000以下 (特に 100以下）が好ましい。  As described above, the force set 5 includes the memory 546 for temporarily storing X-ray image data in order to temporarily store the X-ray image data. X-ray image data saved in the memory 546 can be stored in the memory 546 without the need to delay X-ray imaging until the communication status improves even if the communication is poor or communication is impossible. It is possible to transmit from force set 5 to console 1 at a communication speed according to the communication state between force set 5 and console 1. The capacity of the memory 546 is preferably 4 or more (especially 10 or more) in terms of the number of images that can be stored with the maximum data size from the viewpoint of shooting efficiency. In addition, the capacity of the memory 546 is preferably 1000 or less (particularly 100 or less) in terms of the number of images that can store images of the maximum data size from the viewpoint of low cost.
[0056] 光検出器 542の下層には、ガラス基板により形成された平板上の支持体 547が設け られており、支持体 547によりシンチレータ 541及び光検出器 542の積層構造が支 持されている。  [0056] A support 547 on a flat plate formed of a glass substrate is provided below the photodetector 542, and the stacked structure of the scintillator 541 and the photodetector 542 is supported by the support 547. .
[0057] 支持体 547の下面 (即ち、支持体 547の X線照射方向と反対側の面）には、 X線量 センサ 548が設けられている。 X線量センサ 548は、光検出器 542を透過した X線量 を検出し、 X線量が所定量に達すると、所定 X線量信号を力セッテ制御部 53に送信 する。また、本実施形態では、 X線量センサ 548として、アモルファスシリコン受光素 子を用いている。だが、 X線量センサは、これに限られず、結晶シリコンによる受光素 子等を用いて直接 X線を検出する X線センサや、シンチレータにより蛍光を検出する センサを用いてもよい。  An X-ray dose sensor 548 is provided on the lower surface of the support 547 (that is, the surface opposite to the X-ray irradiation direction of the support 547). The X-ray dose sensor 548 detects the X-ray dose transmitted through the light detector 542, and transmits a predetermined X-ray dose signal to the force set control unit 53 when the X-ray dose reaches a predetermined amount. In this embodiment, an amorphous silicon light-receiving element is used as the X-ray dose sensor 548. However, the X-ray dose sensor is not limited to this, and an X-ray sensor that directly detects X-rays using a light-receiving element made of crystalline silicon or a sensor that detects fluorescence using a scintillator may be used.
[0058] 上述のように、力セッテ 5は、内部電源 51からの電力で駆動し、可搬型のケーブル レスであり、力セッテ通信部 52とコンソール通信部 14とが無線通信を介して通信する ので、コンソール 1との連動性を維持しつつ、ケーブルが被写体に絡まらないように 注意しながら撮影する必要が無ぐ操作性が良ぐ撮影効率を向上させることができ る。 [0058] As described above, the force set 5 is driven by the power from the internal power supply 51 and is portable, and the force set communication unit 52 and the console communication unit 14 communicate via wireless communication. Therefore, while maintaining the linkage with the console 1, it is not necessary to shoot with care so that the cable does not get tangled with the subject. The
なお、本実施形態では、パネル 54が 4096 X 3072画素を持つ 1枚のパネルで構 成された例を示した力 これに限定されず、例えば、ノネル 54力 S2048 X 1536画素 を持つ 4枚の小パネルで構成されたものを用いることもできる。このように複数枚の小 パネルからパネル 54を構成した場合、 4つの小パネルを組みあわせて 1枚のパネル 54とする手間が発生する力 各パネル 54の歩留まりが向上するので、全体としても 歩留まりが向上し低コストィ匕するという利点がある。  In the present embodiment, the power shown in the example in which the panel 54 is configured by one panel having 4096 × 3072 pixels is not limited to this, and for example, four panels having nonel 54 force S2048 × 1536 pixels are provided. Those composed of small panels can also be used. In this way, when the panel 54 is composed of a plurality of small panels, the force required to combine four small panels into one panel 54 improves the yield of each panel 54, so the overall yield There is an advantage that the cost is improved and the cost is reduced.
更に、本実施形態では、シンチレータ 541と光検出器 542とを用いて照射された X 線の電気エネルギーを読み出す例を示した力 これに限定されず、 X線を電気エネ ルギ一に直接変換できる光検出器を適用することが可能である。例えば、ァモルファ ス Seや PbI2等を用いた X線電気エネルギー変換部とアモルファスシリコン TFT等と により構成された X線検出器を用いるようにしてもょ 、。  Further, in the present embodiment, the force shown in the example of reading the electric energy of the X-rays irradiated using the scintillator 541 and the photodetector 542 is not limited to this, and the X-rays can be directly converted into electric energy. It is possible to apply a photodetector. For example, an X-ray detector composed of an X-ray electrical energy converter using amorphous Se or PbI2 and an amorphous silicon TFT may be used.
また、本実施形態では、信号読取回路 544に 1つの AZD変翻5442が設けられ た例を示したが、これに限定されず、複数の AZD変 を適用することが可能であ る。  In the present embodiment, an example in which one AZD modification 5442 is provided in the signal reading circuit 544 is shown, but the present invention is not limited to this, and a plurality of AZD modifications can be applied.
そして、 AZD変換器の数は、画像読取時間を短くして所望の SZN比を得るため に、 4以上、特に 8以上であることが好ましい。  The number of AZD converters is preferably 4 or more, particularly 8 or more in order to shorten the image reading time and obtain a desired SZN ratio.
また、 AZD変換器の数は、低コスト化'小型化のために、 64以下、特に 32以下で あることが好ましい。これにより、アナログ信号帯域及び AZD変換レートを不必要に 大きくすることがない。  Further, the number of AZD converters is preferably 64 or less, particularly 32 or less, in order to reduce cost and reduce size. As a result, the analog signal band and the AZD conversion rate are not increased unnecessarily.
また、本実施形態では、ガラスにより形成された支持体 547の例を示した力 これに 限定されず、榭脂ゃ金属等によって形成された支持体を適用することが可能である。 なお、上述では、コンソール 1は、 X線制御室 R2に設置されている旨を記載したが 、コンソール 1は、無線通信可能な携帯端末であってもよい。この場合、 X線制御室 R 2にも無線中継器を設置し、コンソール通信部 14は、 X線撮影室 R1内の無線中継器 6とも X線制御室 R2内の無線中継器とも無線通信可能で、その結果、 X線撮影室 R1 内でも X線制御室 R2内でも力セッテ 5と通信できることが好ましい。これにより、操作 者は、従来のように X線制御室 R2内だけでなぐ X線撮影室 R1内で被写体に撮影 位置等にっ 、て指示をしながら当該コンソール 1で X線画像を確認したり、 X線画像 データの画像処理を開始させたりすることができ、また、 X線撮影室 R1と X線制御室 R2の間の移動時間で X線画像を確認したり、 X線画像データの画像処理を開始させ たりすることもでき、 X線撮影から X線画像を確認するサイクルを繰り返す X線撮影全 体のトータルの撮影効率を向上させることができる。 Further, in the present embodiment, the force shown in the example of the support 547 formed of glass is not limited to this, and a support formed of a resin or the like can be applied. In the above description, it has been described that the console 1 is installed in the X-ray control room R2. However, the console 1 may be a portable terminal capable of wireless communication. In this case, a radio repeater is also installed in the X-ray control room R2, and the console communication unit 14 can communicate with both the radio repeater 6 in the X-ray radiographing room R1 and the radio repeater in the X-ray control room R2. As a result, it is preferable that communication with the force set 5 is possible in both the X-ray imaging room R1 and the X-ray control room R2. As a result, the operator can shoot the subject in the X-ray room R1 just as in the conventional X-ray room R2. The X-ray image can be confirmed on the console 1 while instructing the position, etc., and image processing of X-ray image data can be started. The X-ray room R1 and the X-ray control room You can check the X-ray image during the travel time between R2 and start image processing of the X-ray image data, and repeat the cycle to check the X-ray image from the X-ray image. Total shooting efficiency can be improved.
この場合、無線中継器 6は、力セッテ 5と無線中継器 6との間の無線通信の通信状 態を、無線通信の受信電波強度の低下や無線通信帯域でのノイズ量などから検出 可能である。この場合、無線中継器 6で検出された力セッテ通信部 52と無線中継器 6 との間の無線通信の通信状態の情報を、無線中継器 6がコンソール通信部 14に送 信し、コンソール通信部 14が受信すると、コンソール制御部 13が無線通信の通信状 態を検知する。一方、コンソール通信部 14と無線中継器 6との間の無線通信の通信 状態を、コンソール通信部 14が無線通信の受信電波強度の低下や無線通信帯域で のノイズ量など力も検出可能である。  In this case, the wireless repeater 6 can detect the communication state of the wireless communication between the force set 5 and the wireless repeater 6 from a decrease in the received radio wave strength of the wireless communication or the amount of noise in the wireless communication band. is there. In this case, the wireless repeater 6 sends the information on the communication state of the wireless communication between the force set communication unit 52 and the wireless repeater 6 detected by the wireless repeater 6 to the console communication unit 14, and the console communication When the unit 14 receives the data, the console control unit 13 detects the communication state of the wireless communication. On the other hand, the communication state of the wireless communication between the console communication unit 14 and the wireless repeater 6 can be detected by the console communication unit 14 such as a decrease in the received radio wave intensity of the wireless communication and the amount of noise in the wireless communication band.
[0060] また、実行通信速度を検出することにより、無線通信の通信状態を検出してもよい。  [0060] Further, the communication state of wireless communication may be detected by detecting the execution communication speed.
この場合、力セッテ 5と無線中継器 6との間の無線通信の実行通信速度と無線中継 器 6とコンソール通信部 14との間の無線通信の実行通信速度を無線中継器 6が別々 に検出しても良いし、力セッテ 5と無線中継器 6との間の無線通信と無線中継器 6とコ ンソール通信部 14との間の無線通信のトータルとしての実行通信速度を無線中継器 6が検出しても良いし、また、力セッテ 5と無線中継器 6との間の無線通信と無線中継 器 6とコンソール通信部 14との間の無線通信を含む力セッテ 5からコンソール通信部 14までのトータルとしての実行通信速度をコンソール通信部 14が検出しても良い。 そして、実行通信速度の情報に基づきコンソール制御部 13が無線通信の通信状態 を検知する。  In this case, the wireless repeater 6 separately detects the effective communication speed of the wireless communication between the force set 5 and the wireless repeater 6 and the effective communication speed of the wireless communication between the wireless repeater 6 and the console communication unit 14. Alternatively, the wireless repeater 6 determines the total communication speed of the wireless communication between the force set 5 and the wireless repeater 6 and the wireless communication between the wireless repeater 6 and the console communication unit 14. It may be detected, and from force set 5 to console communication unit 14 including wireless communication between force set 5 and wireless repeater 6 and wireless communication between wireless repeater 6 and console communication unit 14 The console communication unit 14 may detect the total execution communication speed. Based on the information on the execution communication speed, the console control unit 13 detects the communication state of the wireless communication.
[0061] 力セッテ通信部 52と無線中継器 6との無線通信が通信することができない状態であ るとコンソール制御部 13が検出したとき、すなわち、無線通信が通信不能な状態とコ ンソール制御部 13が検出したときだけでなく、コンソール通信部 14と無線中継器 6と の間の無線通信が通信不能な状態とコンソール制御部 13が検出したとき、コンソ一 ル制御部 13は、表示制御部 11を制御して表示部 3に通信不能な状態であることを 表示する。 [0061] When the console control unit 13 detects that the wireless communication between the force set communication unit 52 and the wireless repeater 6 cannot be performed, that is, the wireless communication cannot be performed and the console control is performed. When the console control unit 13 detects that the wireless communication between the console communication unit 14 and the wireless repeater 6 is not possible, the console control unit 13 performs display control. Control unit 11 to confirm that communication with display unit 3 is disabled indicate.
[0062] また、コンソール通信部 14が力セッテ 5から X線画像データを受信中と検出している 間、すなわち、コンソール通信部 14が力セッテ 5から X線画像データを受信中の場合 、コンソール制御部 13は、表示制御部 11を制御し、表示部 3に X線画像データを受 信中であることを表示する。表示部 3に X線画像データを受信中であることが表示さ れている時に、コンソール制御部 13がこれらの無線通信が通信不能な状態と検知し た場合、コンソール制御部 13は、表示制御部 11を制御して表示部 3に X線画像デー タを受信中であることを表示する。  Further, while the console communication unit 14 detects that X-ray image data is being received from the force set 5, that is, when the console communication unit 14 is receiving X-ray image data from the force set 5, the console The control unit 13 controls the display control unit 11 to display on the display unit 3 that X-ray image data is being received. When the console control unit 13 detects that wireless communication is not possible when the display unit 3 displays that X-ray image data is being received, the console control unit 13 performs display control. Control unit 11 to display on display 3 that X-ray image data is being received.
[0063] また、力セッテ通信部 52と無線中継器 6との無線通信が不良な状態であるとコンソ ール制御部 13が検出したときと、コンソール通信部 14と無線中継器 6との無線通信 が不良な状態であるとコンソール制御部 13が検出したときとでは、別の表示を表示 部がするように、コンソール制御部 13が表示制御部 11を制御するようにしても良！、。  [0063] Further, when the console control unit 13 detects that the wireless communication between the force set communication unit 52 and the wireless repeater 6 is in a poor state, the wireless communication between the console communication unit 14 and the wireless repeater 6 is performed. The console control unit 13 may control the display control unit 11 so that the display unit displays another display when the console control unit 13 detects that the communication is poor! ,.
[0064] 次に、本発明の第一の実施形態による X線画像撮影システムによる動作について 説明する。  Next, the operation of the X-ray imaging system according to the first embodiment of the present invention will be described.
[0065] コンソール制御部 13から撮影準備指示信号を受信するまで、力セッテ制御部 53は 、走査駆動回路 543をオフ状態に保つように制御する。力セッテ通信部 52は、オフ 状態に保っために、力セッテ制御部 52は、走査線 5422、信号線 5423、リセット線 5 426の電位を同電位にし、収集電極 5421にバイアスを印加しないように、走査駆動 回路 543を力セッテ制御部 53が制御する。また、信号読取回路 544の電源をオフ状 態に保ち、走査線 5422、信号線 5423、リセット線 5426の電位を GND電位にしても よい。  [0065] Until the imaging preparation instruction signal is received from the console control unit 13, the force setting control unit 53 controls the scan driving circuit 543 to be kept in the OFF state. In order to keep the force set communication unit 52 in the OFF state, the force set control unit 52 keeps the scanning line 5422, the signal line 5423, and the reset line 5 426 at the same potential so that no bias is applied to the collecting electrode 5421. The force setting control unit 53 controls the scanning drive circuit 543. Alternatively, the power supply of the signal reading circuit 544 may be kept off, and the potentials of the scanning line 5422, the signal line 5423, and the reset line 5426 may be set to the GND potential.
[0066] 走査駆動回路 543及び信号読取回路 544にバイアスが印加されていない状態に は、撮影待機モードとスリープモードとがある。  [0066] The state in which no bias is applied to the scanning drive circuit 543 and the signal reading circuit 544 includes a photographing standby mode and a sleep mode.
なお、撮影待機モードでは、力セッテ通信部 52は、フォトダイオードにバイアス電位 を印加しないだけでなぐ走査駆動回路 543及び信号読取回路 544の立ち上がりが 早いので、走査駆動回路 543及び信号読取回路 544にも電力を供給しないと、電力 消費を更に抑えることができ好ましい。更に、撮影待機モードでは、信号が発生しな いので、力セッテ通信部 52は、データ変換部 545にも電力供給しないことが、電力消 費を更に抑えることができ好ま 、。 Note that, in the imaging standby mode, the force setting communication unit 52 does not apply a bias potential to the photodiode, and the scanning drive circuit 543 and the signal reading circuit 544 rise quickly, so the scanning drive circuit 543 and the signal reading circuit 544 However, if power is not supplied, power consumption can be further suppressed, which is preferable. Further, since no signal is generated in the shooting standby mode, the power set communication unit 52 does not supply power to the data conversion unit 545. This is preferable because it can further reduce costs.
また、走査駆動回路 543及び信号読取回路 544にバイアスが印加されていない状 態として、撮影待機モードよりも更に消費電力の少ないスリープモードを設けることが 好ましい。そして、撮影済み画像をコンソール 1に完全に送信後、スリープモードに移 行することが好ましい。そして、スリープモードでは、コンソール 1から指示により撮影 待機モードに立ち上がるのに必要な機能のみ残して、力セッテ通信部 52の高速送 信機能又は送信機能全体やメモリへの電力供給を停止することが好ま Uヽ。すなわ ち、スリープモードでは、フォトダイオードへのバイアス電位を印加せず、走査駆動回 路 543、信号読取回路 544、データ変換部 545、メモリ 546、及び力セッテ通信部 52 の高速送信機能又は送信機能全体に電力供給しないことが好ましい。これにより、無 駄な電力消費をより抑えることができる。  In addition, as a state where no bias is applied to the scanning drive circuit 543 and the signal reading circuit 544, it is preferable to provide a sleep mode that consumes less power than the imaging standby mode. It is preferable to shift to the sleep mode after completely transmitting the captured image to the console 1. In the sleep mode, it is possible to stop the power supply to the power set communication unit 52 and the entire high speed transmission function or the entire transmission function and the memory, leaving only the functions necessary to start the shooting standby mode by an instruction from the console 1. Like U ヽ. That is, in the sleep mode, the bias potential to the photodiode is not applied, and the high-speed transmission function or transmission of the scanning drive circuit 543, the signal reading circuit 544, the data conversion unit 545, the memory 546, and the force set communication unit 52 is performed. It is preferable not to supply power to the entire function. This can further reduce unnecessary power consumption.
[0067] このように、単位時間当たりの消費電力が撮影可能状態より低い撮影待機モードと スリープモード制御下の状態では、力セッテ通信部 52が走査線 5422、信号線 5423 、リセット線 5426の電位を同電位にし、収集電極 5421にバイアスを印加しない状態 、すなわち、複数の画素に電圧が実質的に印加されない状態であるので、フォトダイ オードやトランジスタに電圧が実質的に印可されることにより劣化、すなわち、複数の 画素の劣化を抑えることができる。また、無駄な電力の消費も抑えられる。  [0067] In this manner, in the shooting standby mode and the sleep mode control state in which the power consumption per unit time is lower than that in the shooting enabled state, the force set communication unit 52 detects the potentials of the scanning line 5422, the signal line 5423, and the reset line 5426. Is not applied to the collecting electrode 5421, that is, a voltage is not substantially applied to a plurality of pixels, and is deteriorated by substantially applying a voltage to a photodiode or a transistor. That is, deterioration of a plurality of pixels can be suppressed. In addition, useless power consumption can be suppressed.
[0068] そして、例えば、 X線照射スィッチの 1stスィッチが ONされたり、操作入力部 2を介 して、被写体情報や撮影情報等、所定の項目が入力されるなどの入力部 12が撮影 のための指示内容を受信したり、また、 HISZRIS71からオーダ情報を受信したりす ると、コンソール制御部 13は、操作者の指示内容や HISZRIS71など力ものオーダ 情報に基づ ヽて撮影条件を決定し、この撮影条件に基づ！ヽた撮影準備指示信号を 、 X線源制御部 43及び力セッテ制御部 53にコンソール通信部 14を介して送信し、撮 影可能状態に移行させる。  [0068] Then, for example, when the 1st switch of the X-ray irradiation switch is turned on or a predetermined item such as subject information or imaging information is input via the operation input unit 2, the input unit 12 performs imaging. Console control unit 13 determines the shooting conditions based on the instruction contents of the operator and powerful order information such as HISZRIS71. Based on these shooting conditions! The obtained radiography preparation instruction signal is transmitted to the X-ray source control unit 43 and the force setting control unit 53 via the console communication unit 14 to shift to a radiographable state.
ここで、撮影準備指示は、例えば X線照射スィッチの 1stスィッチのように操作者が 操作入力部 2を介して入力する指示である。また、被写体情報や撮影情報等、所定 の項目が入力されたことを、撮影準備指示としてもよい。  Here, the imaging preparation instruction is an instruction that the operator inputs via the operation input unit 2 such as the 1st switch of the X-ray irradiation switch. In addition, input of predetermined items such as subject information and shooting information may be used as a shooting preparation instruction.
[0069] X線源制御部 43は、撮影準備指示信号を受信すると、高圧発生源 41を駆動制御 して、 X線管 42に高圧を印加する状態に移行させる。 [0069] Upon receiving the imaging preparation instruction signal, the X-ray source control unit 43 drives and controls the high-voltage generation source 41. Then, the X-ray tube 42 is shifted to a state where a high pressure is applied.
[0070] 力セッテ制御部 53は、撮影準備指示信号を受信すると、撮影可能状態に移行する 。すなわち、撮影可能状態において撮影指示が入力されるまで全ての画素のリセット を所定間隔で繰り返し、暗電流によりコンデンサ 5424に電気エネルギーが蓄積され ることを防止する。また、撮影可能状態が継続する時間は不明なため、この所定間隔 は、撮影時よりも長ぐまた、トランジスタ 5425のオン時間が撮影時よりも短く設定さ れる。これにより撮影可能状態では、トランジスタ 5425に負荷の力かる読み出し動作 が少なくなる。そして、撮影可能状態に移行した後、力セッテ制御部 53は、コンソ一 ル 1に撮影可能状態移行信号を送信する。コンソール制御部 13は、撮影可能状態 移行信号を受信すると、表示部 3が力セッテが撮影可能状態に移行した旨のカセッ テ撮影可能状態表示を表示部 3がするように表示制御部 11を制御する。  When the force setting control unit 53 receives the shooting preparation instruction signal, the force setting control unit 53 shifts to a shooting ready state. That is, all pixels are reset at predetermined intervals until a shooting instruction is input in a shooting enabled state, thereby preventing electrical energy from being accumulated in the capacitor 5424 due to dark current. In addition, since the time during which the photographing enabled state is continued is unknown, the predetermined interval is set longer than that at the time of photographing, and the ON time of the transistor 5425 is set shorter than that at the time of photographing. As a result, in a state where photographing can be performed, the reading operation with a load applied to the transistor 5425 is reduced. Then, after shifting to the shooting enabled state, the force setting control unit 53 transmits a shooting enabled state shift signal to the console 1. When the console control unit 13 receives the shooting ready state transition signal, the display control unit 11 controls the display unit 3 so that the display unit 3 displays the cassette shooting ready state display indicating that the force set has shifted to the shooting ready state. To do.
[0071] 撮影指示がコンソール制御部 13に入力されると、コンソール制御部 13は、操作者 の指示内容や HISZRIS71などからのオーダ情報に基づいて撮影条件を決定し、 この撮影条件に関する撮影条件情報を、 X線源制御部 43及び力セッテ制御部 53に コンソール通信部 14を介して送信する。  [0071] When the imaging instruction is input to the console control unit 13, the console control unit 13 determines the imaging condition based on the instruction content of the operator or the order information from the HISZRIS 71, etc., and the imaging condition information regarding this imaging condition Is transmitted to the X-ray source control unit 43 and the force set control unit 53 via the console communication unit 14.
[0072] コンソール制御部 13は、例えば X線照射スィッチの 2ndスィッチ ONなどの操作者 力もの X線照射指示を受けると、コンソール通信部 14が撮影指示信号を力セッテ 5の 力セッテ制御部 53に送信するように制御すると同時に、コンソール通信部 14にカセ ッテ 5から準備終了信号を受信すると、コンソール通信部 14が X線照射信号を X線源 4に送信するように制御する。そして、コンソール制御部 13に X線照射指示が入力さ れた後、コンソール制御部 13は、 X線源 4と力セッテ 5とを制御し、同期をとりながら撮 影をする。  [0072] When the console control unit 13 receives an X-ray irradiation instruction from the operator such as turning on the 2nd switch of the X-ray irradiation switch, for example, the console communication unit 14 sends an imaging instruction signal to the force setting control unit 53 of the force set 53. When the console communication unit 14 receives a preparation end signal from the cassette 5, the console communication unit 14 controls the X-ray irradiation signal to be transmitted to the X-ray source 4. Then, after the X-ray irradiation instruction is input to the console control unit 13, the console control unit 13 controls the X-ray source 4 and the force set 5 and performs imaging while synchronizing them.
[0073] 力セッテ制御部 53は、撮影指示信号を受信すると、パネル 54を初期化し、パネル 5 4が電気エネルギーを蓄積することができる状態に移行させる。具体的には、リフレツ シュを行い、そして、撮像シーケンスの為の専用の全画素のリセットを所定回数及び 電気工ネルギー蓄積状態専用の全画素のリセットを行って電気工ネルギー蓄積状態 に遷移させる。曝射要求力 撮影準備完了までの期間は所定時間が短いことが実使 用上要求されるので、力セッテ制御部 53は、そのために撮像シーケンス専用の全画 素のリセットを行う。更に、撮影可能状態の駆動のいかなる状態力もも曝射要求が発 生した場合は、即時撮像シーケンス駆動に入ることにより曝射要求カゝら撮影準備完 了までの期間を短くすることにより、操作性の向上を図る。 When the force setting control unit 53 receives the imaging instruction signal, the force setting control unit 53 initializes the panel 54 and shifts to a state in which the panel 54 can store electric energy. Specifically, refreshing is performed, and all pixels dedicated for the imaging sequence are reset a predetermined number of times and all pixels dedicated to the electric energy storage state are reset to transit to the electric energy storage state. The required force of exposure The period until the preparation for imaging is completed is required for practical use. Perform an elementary reset. In addition, if an exposure request occurs for any state force of driving in the imaging enabled state, the operation can be performed by shortening the period until the imaging preparation is completed by entering the immediate imaging sequence driving. To improve performance.
[0074] パネル 54が電気エネルギーを蓄積できる状態に移行すると、力セッテ制御部 53は 、コンソール通信部 14に力セッテ 5の準備終了信号を送信する。コンソール通信部 1 4は、この準備終了信号を受信すると、 X線照射信号を X線源 4に送信すると同時に コンソール制御部 13に力セッテの準備終了信号を伝達する。  When the panel 54 shifts to a state in which electrical energy can be stored, the force set control unit 53 transmits a preparation completion signal for the force set 5 to the console communication unit 14. When receiving the preparation completion signal, the console communication unit 14 transmits an X-ray irradiation signal to the X-ray source 4 and simultaneously transmits a force set preparation completion signal to the console control unit 13.
[0075] コンソール制御部 13は、この力セッテの準備終了信号を受信すると、 X線撮影中で あることを示す X線撮影中表示を表示部 3がするように表示制御部 11を制御する。一 方、 X線源制御部 43は、 X線照射信号を受信すると、高圧発生源 41を駆動制御して X線管 42に高圧を印加し、 X線源 4から X線を発生させる。 X線源 4から発生した X線 は、 X線照射口に設けられた X線絞り装置により X線照射範囲を調整され、被写体を 照射する。  When the console control unit 13 receives the force set preparation end signal, the console control unit 13 controls the display control unit 11 so that the display unit 3 displays an X-ray radiographing display indicating that X-ray radiography is being performed. On the other hand, when receiving the X-ray irradiation signal, the X-ray source control unit 43 drives and controls the high-pressure generation source 41 to apply a high pressure to the X-ray tube 42 to generate X-rays from the X-ray source 4. X-rays generated from the X-ray source 4 are irradiated to the subject after the X-ray irradiation range is adjusted by an X-ray aperture device provided at the X-ray irradiation port.
[0076] 被写体を透過した X線は、力セッテ 5に入射する。この力セッテ 5に入射した X線は、 シンチレータ 541によって可視光に変換される。  The X-ray that has passed through the subject enters the force set 5. X-rays incident on the force set 5 are converted into visible light by the scintillator 541.
[0077] X線量センサ 548は、力セッテ 5に照射された X線量を検出する。そして、検出した X線量は、 X線量センサ 548により検出される。その X線照射量が所定量に達すると、 X線量センサ 548が所定 X線量信号を力セッテ制御部 53に送信する。力セッテ制御 部 53は、所定 X線量信号を受信すると、無線中継器 6を介してコンソール通信部 14 に X線終了信号を送信する。コンソール通信部 14は、この X線終了信号を受信する と、コンソール制御部 13に X線終了信号を伝達するとともに、 X線源制御部 43に X線 照射停止信号を送信する。 X線源制御部 43は、この X線照射停止信号を受信すると 、高圧発生源 41を駆動制御し、高圧発生源 41が X線管 42への高圧の印加を停止 する。これにより X線の発生が停止する。  [0077] The X-ray dose sensor 548 detects the X-ray dose irradiated to the force set 5. The detected X-ray dose is detected by an X-ray dose sensor 548. When the X-ray irradiation amount reaches a predetermined amount, the X-ray dose sensor 548 transmits a predetermined X-ray dose signal to the force set control unit 53. When the force set control unit 53 receives the predetermined X-ray dose signal, the force set control unit 53 transmits an X-ray end signal to the console communication unit 14 via the wireless repeater 6. When receiving the X-ray end signal, the console communication unit 14 transmits the X-ray end signal to the console control unit 13 and transmits the X-ray irradiation stop signal to the X-ray source control unit 43. When the X-ray source control unit 43 receives this X-ray irradiation stop signal, the X-ray source control unit 43 drives and controls the high-pressure generation source 41, and the high-pressure generation source 41 stops applying high pressure to the X-ray tube 42. This stops X-ray generation.
[0078] 力セッテ制御部 53は、 X線終了信号を送信すると、 X線終了信号に基づいて走査 駆動回路 543と信号読取回路 544とを駆動制御する。走査駆動回路 543は、光検出 器 542が取得した電気エネルギーを読み出し、取得した電気エネルギーを信号読取 回路 544に入力する。例えば、 X線終了信号の送信の開始又は終了から所定時間 後、光検出器 542が取得した電気エネルギーを読み出すようにしてもよいし、送信の 終了と同時に光検出器 542が取得した電気エネルギーを読み出すようにしてもよい。 信号読取回路 544は、入力された電気エネルギーをデジタル信号に変換する。そし て、データ変換部 545は、デジタル信号を画像データに変換する。メモリ 546は、デ ータ変換部 545により変換された画像データを一時保存する。 When the force set control unit 53 transmits the X-ray end signal, the force setting control unit 53 controls the scanning drive circuit 543 and the signal reading circuit 544 based on the X-ray end signal. The scanning drive circuit 543 reads the electrical energy acquired by the photodetector 542 and inputs the acquired electrical energy to the signal reading circuit 544. For example, a predetermined time from the start or end of transmission of the X-ray end signal Thereafter, the electrical energy acquired by the photodetector 542 may be read out, or the electrical energy acquired by the photodetector 542 may be read out simultaneously with the end of transmission. The signal reading circuit 544 converts the input electric energy into a digital signal. Then, the data conversion unit 545 converts the digital signal into image data. The memory 546 temporarily stores the image data converted by the data conversion unit 545.
[0079] 続いて力セッテ制御部 53は、画像データを取得した後に、補正用画像データを取 得する。補正用画像データは、 X線照射をしない暗画像データであり、高品質の X線 画像を取得するために X線画像の補正に使用するものである。補正用画像データの 取得方法は、 X線を照射しない点以外は、画像データの取得方法と同じである。電 気エネルギー蓄積時間は、画像データを取得するときと補正用画像データを取得す るときとで等しくなるように設定する。ここで、電気エネルギー蓄積時間とは、リセット動 作が完了したとき、即ちリセット時のトランジスタ 5425をオフにしてから、次に電気工 ネルギ一読み出しを行うためにトランジスタ 5425をオンにするまでの時間である。よ つて、各走査線 5422により電気エネルギー蓄積が始まるタイミングや電気工ネルギ 一蓄積時間が異なる。 Subsequently, the force setting control unit 53 acquires the correction image data after acquiring the image data. The image data for correction is dark image data that is not irradiated with X-rays, and is used for correcting X-ray images in order to obtain high-quality X-ray images. The correction image data acquisition method is the same as the image data acquisition method except that X-rays are not irradiated. The electrical energy storage time is set to be equal when image data is acquired and when correction image data is acquired. Here, the electric energy storage time is the time from when the reset operation is completed, that is, after turning off the transistor 5425 at the time of resetting until the next time the transistor 5425 is turned on to read out electric energy. It is. Therefore, the timing at which electrical energy storage starts and the electrical energy storage time differ for each scanning line 5422.
[0080] データ変換部 545は、構成した画像データを、取得した補正用画像データに基づ いてオフセット補正し、続いて、予め取得してメモリ 546に保存されているゲイン補正 用データに基づいてゲイン補正する。そして、不感画素や複数の小パネルで構成さ れたパネルの場合、小パネルのつなぎ目部などに違和感を生じな ヽように画像を連 続的に補間して、パネルに由来する補正処理を完了する。本実施形態では、データ 変換部 545は、力セッテ制御部 53と別体である力 力セッテ制御部 53がデータ変換 部 545を兼ねていても良い。  The data conversion unit 545 performs offset correction on the configured image data based on the acquired correction image data, and then, based on the gain correction data acquired in advance and stored in the memory 546. Correct the gain. And in the case of a panel composed of insensitive pixels and multiple small panels, the image is continuously interpolated so as not to cause a sense of incongruity at the joints of the small panels, and the correction process derived from the panel is completed. To do. In the present embodiment, the data conversion unit 545 may be configured such that the force setting control unit 53, which is a separate body from the force setting control unit 53, also serves as the data conversion unit 545.
[0081] そして、補正処理されメモリ 546に X線画像データが一時保存されると、力セッテ制 御部 53は、力セッテ通信部 52、無線中継器 6、コンソール通信部 14を介して X線画 像データを送信する。  [0081] Then, when the X-ray image data is temporarily stored in the memory 546 after correction processing, the force set control unit 53 transmits the X-ray image via the force set communication unit 52, the wireless repeater 6, and the console communication unit 14. Send image data.
[0082] このように、力セッテ 5は、内部電源 51から電力の供給を受けて機能するメモリ 546 を備え、パネル 54により得られて力セッテ通信部 52により送信される X線画像データ を一時的に保存するので、パネル 54からのデータ生成と、力セッテとコンソールとの 通信との間のアキュームレータとして機能し、 X線画像データを、力セッテとコンソ一 ルとの通信状態に応じて、力セッテ力もコンソールに転送することができる。特に、メ モリが RAMであるので、力セッテ 5は、パネル 54からのデータ生成速度が高くても良 好にデータを保存することができる。 As described above, the force set 5 includes the memory 546 that functions by receiving power from the internal power supply 51, and temporarily obtains X-ray image data obtained by the panel 54 and transmitted by the force set communication unit 52. Data generation from panel 54, and the power set and console It functions as an accumulator for communication, and the force setting force can be transferred to the console according to the communication state between the force setting and the console. In particular, since the memory is RAM, the force set 5 can store data even when the data generation speed from the panel 54 is high.
[0083] コンソール制御部 13は、 X線画像データを受信すると、画像保存部 16に X線画像 データを一時保存させる。そして、コンソール制御部 13は、画像処理部 15を制御し て画像保存部 16に一時保存した X線画像データ力もサムネイル画像データを作成さ せる。表示制御部 11は、作成されたサムネイル画像データに基づいて、表示部 3を 制御してサムネイル画像を表示させる。  When receiving the X-ray image data, the console control unit 13 causes the image storage unit 16 to temporarily store the X-ray image data. Then, the console control unit 13 controls the image processing unit 15 so that the X-ray image data force temporarily stored in the image storage unit 16 also creates thumbnail image data. The display control unit 11 controls the display unit 3 to display thumbnail images based on the created thumbnail image data.
[0084] その後、画像処理部 15は、画像データを操作者の指示内容や HISZRIS71など からのオーダ情報に基づいて画像処理する。この画像処理された画像データは、表 示部 3に画像表示されると同時に画像保存部 16に送信され、画像データとして保存 される。更に、操作者の指示に基づいて、画像処理部 15は、画像データを再画像処 理し、画像データの画像処理結果は、表示部 3が表示する。また、ネットワーク通信 部 18は、画像データをネットワーク上の外部装置であるイメージャ 72、画像処理端末 73、ビューヮ 74、ファイルサーバ 75等に転送する。コンソール 1から画像データが転 送されると、転送された外部装置は、対応して機能する。すなわち、イメージャ 72は、 この X線画像データをフィルムなどの画像記録媒体に記録する。画像処理端末 73は 、この X線画像データの画像処理や CAD (Computer Aided Diagnosis :コンピュータ 診断支援）のための処理をし、処理した X線画像データをファイルサーバ 75に保存 する。ビューヮ 74は、この X線画像データに基づいて X線画像を表示する。ファイル サーバ 75は、この X線画像データを保存する。  Thereafter, the image processing unit 15 performs image processing on the image data based on the instruction content of the operator or order information from the HISZRIS 71 or the like. This image processed image data is displayed on the display unit 3 and simultaneously transmitted to the image storage unit 16 to be stored as image data. Further, based on the operator's instruction, the image processing unit 15 re-images the image data, and the display unit 3 displays the image processing result of the image data. The network communication unit 18 also transfers the image data to an imager 72, an image processing terminal 73, a view screen 74, a file server 75, etc., which are external devices on the network. When image data is transferred from console 1, the transferred external device functions correspondingly. That is, the imager 72 records this X-ray image data on an image recording medium such as a film. The image processing terminal 73 performs image processing of the X-ray image data and processing for CAD (Computer Aided Diagnosis), and stores the processed X-ray image data in the file server 75. The view 74 displays an X-ray image based on this X-ray image data. The file server 75 stores this X-ray image data.
[0085] このように、力セッテ制御部 53は、適切なタイミングで、撮影可能状態、撮影可能状 態より消費電力の低い 1又は複数の撮影待機モード制御下の状態、更に消費電力 の低 、スリープモード制御下の状態と!/、うように、力セッテ 5の電力供給の状態を変 更する制御をする。そして、力セッテ制御部 53は、力セッテ 5の電力供給の状態を変 更する制御をするタイミングに合わせて、力セッテ 5の電力供給の状態を示す電力供 給状態情報を力セッテ通信部 52が送信するように制御する。 コンソール制御部 13は、コンソール通信部 14が受信した力セッテ 5の電力供給の 状態を示す電力供給状態情報を用いて力セッテ 5を制御できるので、良好な撮影を 制御でき、かつ、撮影効率を向上させることができる。また、コンソール制御部 13は、 電力供給状態情報に応じて表示部 3に表示をさせることができるので、力セッテ 5が 直ちに X線撮影を行えるカゝ否かを操作者が判断して、例えば、他のカセッテゃモダリ ティでの撮影を先にする、後にするなどして、撮影効率を向上させることができる。 In this manner, the force setting control unit 53, at an appropriate timing, is in a shooting ready state, in a state under control of one or a plurality of shooting standby modes in which the power consumption is lower than in the shooting ready state, and further in a low power consumption. Control to change the power supply state of the force set 5 as in the state under sleep mode control. Then, the force set control unit 53 sends the power supply state information indicating the power supply state of the force set 5 to the force set communication unit 52 in accordance with the control timing for changing the power supply state of the force set 5. Control to send. Since the console control unit 13 can control the force set 5 using the power supply state information indicating the power supply state of the force set 5 received by the console communication unit 14, it can control good shooting and can improve the shooting efficiency. Can be improved. Further, since the console control unit 13 can display on the display unit 3 according to the power supply state information, the operator determines whether the force set 5 can immediately perform X-ray imaging, for example, Shooting with other cassette modalities can be done first or later to improve shooting efficiency.
[0086] 次に、本発明の第一の実施形態における X線インターロックをするときの動作につ いて説明する。 Next, the operation when performing X-ray interlock in the first embodiment of the present invention will be described.
[0087] 図 5に、 X線インターロックをするときのフローチャートを示す。  FIG. 5 shows a flowchart when the X-ray interlock is performed.
[0088] コンソール制御部 13は、コンソール通信部 14又は無線中継器 6の検出結果を用い て、力セッテ通信部 52と無線中継器 6との無線通信の通信状態を検出する。コンソ一 ル通信部 14が、力セッテ通信部 52と無線中継器 6との無線通信状態が通信不能で あると判断すると (ステップ S10 :Yes)、コンソール制御部 13は、表示部 3が無線通 信が不能状態であることを示す表示をするように表示制御部 11を制御する (ステップ Sl l)。そして、コンソール制御部 13は、 X線インターロックをオンにして、 X線照射で きな 、ように制御する (ステップ S 12)。 The console control unit 13 detects the communication state of the wireless communication between the force set communication unit 52 and the wireless repeater 6 using the detection result of the console communication unit 14 or the wireless repeater 6. When the console communication unit 14 determines that the wireless communication state between the force set communication unit 52 and the wireless repeater 6 is not communicable (step S10: Yes), the console control unit 13 indicates that the display unit 3 is wirelessly connected. The display control unit 11 is controlled to display that the communication is impossible (step Sl l). Then, the console control unit 13 turns on the X-ray interlock and performs control so that X-ray irradiation cannot be performed (step S12).
[0089] コンソール通信部 14が、力セッテ通信部 52と無線中継器 6との通信が不能でない と判断すると (ステップ S10 :No)、コンソール制御部 13は、力セッテ通信部 52と無線 中継器 6との通信が不良であるか否かを判断する (ステップ S13)。コンソール制御部 13が、力セッテ通信部 52と無線中継器 6との無線通信が不良であると判断すると (ス テツプ S13 : Yes)、コンソール制御部 13は、表示部 3が無線通信が不良状態である ことを示す表示をするように表示制御部 11を制御し (ステップ S14)、力セッテ通信部 52と無線中継器 6との通信が不良でないと判断すると (ステップ S13 :No)、そのまま S 15に進む。そして、コンソール制御部 13は、コンソール通信部 14が受信したカセッ テ 5の電力供給の状態を示す電力供給状態情報を用いて、力セッテ 5が撮影可能状 態か否か判断する (ステップ S15)。コンソール制御部 13は、撮影可能状態でないと 判断すると (ステップ S15 :No)、 X線インターロックをオンにして、 X線照射できないよ うに制御する (ステップ S 12)。一方、コンソール制御部 13は、撮影可能状態と判断 すると (ステップ S 15 : No)、 X線インターロックをオフにして、 X線照射できるように制 御する (ステップ S 12)。 [0089] When the console communication unit 14 determines that communication between the force set communication unit 52 and the wireless repeater 6 is not impossible (step S10: No), the console control unit 13 determines that the force set communication unit 52 and the wireless repeater 6 It is determined whether or not communication with 6 is poor (step S13). If the console control unit 13 determines that the wireless communication between the force set communication unit 52 and the wireless repeater 6 is poor (step S13: Yes), the console control unit 13 indicates that the display unit 3 is in a poor wireless communication state. The display control unit 11 is controlled so as to display that it is (Step S14), and if it is determined that the communication between the force set communication unit 52 and the wireless repeater 6 is not bad (Step S13: No), the S Proceed to 15. Then, using the power supply state information indicating the power supply state of the cassette 5 received by the console communication unit 14, the console control unit 13 determines whether or not the force cassette 5 is in a photographing enabled state (Step S 15). . If the console control unit 13 determines that the imaging is not possible (step S15: No), the console control unit 13 turns on the X-ray interlock and controls so that X-ray irradiation cannot be performed (step S12). On the other hand, the console control unit 13 determines that shooting is possible. Then (step S15: No), the X-ray interlock is turned off and control is performed so that X-ray irradiation can be performed (step S12).
[0090] 以上のように、第一の実施形態における X線画像撮影システム 1000は、コンソール 通信部 14がコンソール通信部 14と力セッテ通信部 52との通信不能を検出し、 X線源 4から X線を照射しな ヽようにすることができるので、放射線撮影画像が取得できず、 かつ被写体に本来不要な放射線の照射を防止して、効率的に撮影を行うことができ る。  As described above, in the X-ray imaging system 1000 according to the first embodiment, the console communication unit 14 detects the inability to communicate between the console communication unit 14 and the force set communication unit 52, and the X-ray source 4 Since X-rays can be prevented from being irradiated, a radiographic image cannot be acquired, and radiation can be performed efficiently by preventing unnecessary irradiation of radiation to the subject.
[0091] また、 X線画像データを無線送信する際は、 X線画像データを暗号化して送信する ことが好ましい。すなわち、力セッテ 5に、送信する X線画像データを暗号化する暗号 化手段を設け、また、コンソール 1に暗号化された X線画像データを復号化する暗号 復号ィ匕手段を設けることが好ましい。このような暗号ィ匕手段は、力セッテ制御部 53又 は力セッテ通信部 52が兼ねてもよいし、これらとは別に暗号ィ匕部を設けても良い。ま た、このような暗号復号化手段は、無線中継器 6、コンソール通信部 14又はコンソ一 ル制御部 13が兼ねてもよいし、これらとは別に復号ィ匕部を設けてもよい。  [0091] Further, when X-ray image data is wirelessly transmitted, it is preferable to encrypt the X-ray image data and transmit it. That is, it is preferable that the force set 5 is provided with an encryption means for encrypting the X-ray image data to be transmitted, and the console 1 is provided with an encryption / decryption means for decrypting the encrypted X-ray image data. . Such a cipher key means may be used by the force set control unit 53 or the force set communication unit 52, or a cipher key unit may be provided separately from these. Such encryption / decryption means may also serve as the wireless repeater 6, the console communication unit 14 or the console control unit 13, or may be provided with a decryption unit.
そして、このような暗号ィ匕に適する技術としては、例えば、 IEEE802.ilで規定された WEP(Wired Equivalent Privacy: 64bit又は 128bitのキー長の共通鍵を用いた喑号ィ匕） や、 IEEE802.11iで規定された TKIP(Temporal Key Integrity Protocol:キーを自動的 に変更して暗号化を行うようにした暗号化)、 WPA(Wi-Fi Protected Access :TKIPと IE EE802.1xを併用した暗号化)、 IEEE802.11iに規定される AES(Advanced Encryption S tandard)などが挙げられる力 これらに限らない。  As a technique suitable for such encryption, for example, WEP (Wired Equivalent Privacy: 喑 using a common key with a key length of 64 bits or 128 bits) defined in IEEE802.il, IEEE802.il, etc. 11i TKIP (Temporal Key Integrity Protocol: Encryption that automatically changes the key for encryption), WPA (Wi-Fi Protected Access: Encryption using TKIP and IE EE802.1x together) ), AES (Advanced Encryption Standard) specified in IEEE802.11i, etc.
[0092] また、力セッテ通信部 52やコンソール通信部 14や無線中継器 6には、他の機器が アクセスすることが制限されていることが好ましい。このようなアクセス制限機能は、例 えば、 SSID (Service Set Identifier:接続する機器固有の IDであり、パケットのヘッダに 含まれる SSIDがー致しないパケットを無視する）、 MAC (Media Access Control,媒 体アクセス制御）アドレス（LANカード固有のアドレス）フィルタリング機能（登録した M ACアドレスの端末に対してだけ、接続が可能とする）、 ANY接続拒否機能 (アクセス ポイントに設定する機能で、クライアントの SSID設定力 「ANY」となっている場合に、ァ クセスポイントとの接続を拒否する機能。通常は、クライアントの SSID設定が「ANY」と なっている場合、あらゆる SSIDを持つアクセスポイントに対して接続が可能であること に対する）、ビーコン信号に SSIDを含めない機能、 IEEE802.1Xに規定された認証 (RA DIUS)サーバによるユーザ認証（認証されていない端末からの通信を全て拒否し、認 証されたユーザにのみ通信を許可する)などが挙げられる力 これらに限らない。 [0092] Further, it is preferable that access to other devices is restricted to the force set communication unit 52, the console communication unit 14, and the wireless repeater 6. Such access restriction functions include, for example, SSID (Service Set Identifier: ID that is unique to the connected device and ignores packets that do not match the SSID included in the packet header), MAC (Media Access Control, media Access control) address (address unique to the LAN card) filtering function (allows connection only to the terminal with the registered MAC address), ANY connection denial function (function set on the access point, client SSID A function that denies connection to the access point when the setting power is “ANY.” Normally, the client SSID setting is “ANY”. If it is configured to connect to an access point with any SSID), a function that does not include the SSID in the beacon signal, and user authentication (authentication) by the authentication (RA DIUS) server specified in IEEE802.1X Such as the ability to reject all communications from unauthenticated terminals and allow only authorized users to communicate).
[0093] また、通信速度を向上させるために、力セッテ 5が X線画像データを圧縮し、コンソ ール 1側が圧縮の復号ィ匕をすることが好ましい。すなわち、力セッテ 5に、送信する X 線画像データを圧縮する圧縮化手段を設け、また、コンソール 1に圧縮された X線画 像データを復号化する圧縮復号化手段を設けることが好まし ヽ。このような圧縮ィ匕手 段は、力セッテ制御部 53又は力セッテ通信部 52が兼ねてもよいし、これらとは別に圧 縮ィ匕部を設けても良い。また、このような圧縮復号ィ匕手段は、無線中継器 6、コンソ一 ル通信部 14又はコンソール制御部 13が兼ねてもよいし、これらとは別に圧縮復号ィ匕 部を設けてもよい。 [0093] Further, in order to improve the communication speed, it is preferable that the force set 5 compresses the X-ray image data, and the console 1 side performs the decoding decoding. That is, it is preferable that the force set 5 is provided with a compression means for compressing the X-ray image data to be transmitted, and the console 1 is provided with a compression decoding means for decoding the compressed X-ray image data. Such a compression key means may be combined with the force set control unit 53 or the force set communication unit 52, or a compression key unit may be provided separately from these. Further, such a compression / decryption means may be served by the wireless repeater 6, the console communication unit 14 or the console control unit 13, or a compression / decoding unit may be provided separately from these.
この場合に暗号化するときは、圧縮処理した後、暗号化処理し、暗号の復号化処 理した後、圧縮の復号化処理することが好ましい。すなわち、圧縮化手段により圧縮 された X線画像データを暗号ィ匕手段により暗号ィ匕し、暗号復号化手段により暗号復 号化された X線画像データを圧縮復号化手段により圧縮複合化することが好ましい。  In this case, when encrypting, it is preferable that after the compression process, the encryption process is performed, the encryption decryption process is performed, and then the compression decryption process is performed. That is, the X-ray image data compressed by the compression means is encrypted by the encryption means, and the X-ray image data encrypted by the encryption / decryption means is compressed and decrypted by the compression / decryption means. Is preferred.
[0094] また、本実施形態では、力セッテ 5とコンソール 1とが 1対 1で対応させている例を示 したが、これに限定されず、力セッテとコンソールとが 1対 M、 N対 1、 N対 M (N, Mは 2以上の自然数)で対応させて用いることが可能である。このときには、力セッテとコン ソール間のネットワークを設け、力セッテとコンソールとの対応関係を対応関係情報保 持部に保存し、対応関係情報保持部をネットワーク上又はコンソール内に設け、コン ノールが力セッテを制御することが好まし 、。  Further, in the present embodiment, an example in which the force set 5 and the console 1 are in one-to-one correspondence is shown, but the present invention is not limited to this, and the force set and console are in one pair M, N pairs. It can be used in correspondence with 1, N to M (N and M are natural numbers of 2 or more). At this time, a network between the force set and the console is provided, the correspondence between the force set and the console is stored in the correspondence information holding unit, and the correspondence information holding unit is provided on the network or in the console. It is preferable to control the force set.
[0095] また、本実施形態では、コンソール 1及び力セッテ 5のいずれにおいても、前述した 実施例の機能を実現するソフトウェアのプログラムを記録した記憶媒体をシステムあ るいは装置に供給し、そのシステムあるいは装置のコンピュータ（又は CPUや MPU) が記憶媒体に格納されたプログラムを読み出し実行することによつても、達成されるこ とは言うまでもない。また、プログラム等を記憶させる記憶媒体としては、不揮発性メ モリ、電源バックアップされた揮発性メモリ、 ROMメモリ、光ディスク、ハードディスクな どの磁気ディスク、光磁気ディスク等の記憶媒体を適用してもよ!/、。 In this embodiment, in both the console 1 and the force set 5, a storage medium storing a software program that realizes the functions of the above-described embodiments is supplied to a system or an apparatus. It goes without saying that this can also be achieved by the computer (or CPU or MPU) of the device reading and executing the program stored in the storage medium. Storage media for storing programs, etc., include non-volatile memory, power-backed volatile memory, ROM memory, optical disks, and hard disks. Any storage media such as magnetic disk and magneto-optical disk can be applied! /.
また、コンピュータが読み出したプログラムを実行することにより、前述した実施形態 の機能が実現されるだけでなぐそのプログラムの指示に基づき、コンピュータ上で稼 動して 、る OS (基本システムあるいはオペレーティングシステム）などが実際の処理 の一部又は全部を行!、、その処理によって前述した実施形態の機能が実現される場 合も含まれることは言うまでもな 、。  In addition, an OS (basic system or operating system) that runs on a computer based on the instructions of the program that not only realizes the functions of the above-described embodiments by executing the program read by the computer. Needless to say, a part or all of the actual processing is performed, and the case where the functions of the above-described embodiment are realized by the processing.
更に、記憶媒体力も読み出されたプログラムが、コンピュータに挿入された機能拡 張ボードやコンピュータに接続された機能拡張ユニットに備わるメモリに書き込まれた 後、そのプログラムコードの指示に基づき、その機能拡張ボードや機能拡張ユニット に備わる CPU等が実際の処理の一部又は全部を行 、、その処理によって前述した 実施形態の機能が実現される場合も含まれることは言うまでもない。  Furthermore, after the program whose storage medium power has been read is written in the memory of the function expansion board inserted into the computer or the function expansion unit connected to the computer, the function expansion is performed based on the instruction of the program code. It goes without saying that the CPU or the like provided in the board or function expansion unit performs part or all of the actual processing and the functions of the above-described embodiments are realized by the processing.
更に、このようなプログラムは、ネットワークや回線などを介して外部から提供された ものであってもよい。そして、外部から供給されるプログラムを使用する場合も、不揮 発性メモリ、電源バックアップされた揮発性メモリ、光ディスク、ハードディスクなどの磁 気ディスク、光磁気ディスク等の記憶媒体に記憶されるようにしてもょ 、。  Further, such a program may be provided from outside via a network or a line. Even when an externally supplied program is used, the program is stored in a non-volatile memory, a power-backed up volatile memory, a magnetic disk such as an optical disk or a hard disk, or a storage medium such as a magneto-optical disk. Well, ...
[第二の実施形態] [Second Embodiment]
続、て、図 6を参照しながら X線画像撮影システムの第二の実施形態にっ 、て説 明する。  Next, a second embodiment of the X-ray imaging system will be described with reference to FIG.
ただし、第二の実施形態では、上記第一の実施形態において操作入力部の構成 が異なる（図 6参照)。操作入力部は、 X線照射スィッチと、 X線源指示内容入力部と 、コンソール指示内容入力部とにより構成される。 X線照射スィッチと X線源指示内容 入力部は、 X線源制御部と接続し、コンソール指示内容入力部は、コンソールの入力 部と接続している。また、コンソール通信部は、第一の実施形態と異なり、無線中継 器と接続しているが、 X線源制御部と接続していない。これ以外の構成は、上記第一 の実施形態と同様である。  However, in the second embodiment, the configuration of the operation input unit is different from that in the first embodiment (see FIG. 6). The operation input unit includes an X-ray irradiation switch, an X-ray source instruction content input unit, and a console instruction content input unit. The X-ray irradiation switch and X-ray source instruction content input section are connected to the X-ray source control section, and the console instruction content input section is connected to the console input section. Unlike the first embodiment, the console communication unit is connected to the wireless repeater, but is not connected to the X-ray source control unit. Other configurations are the same as those in the first embodiment.
第二の実施形態では、操作入力部と X線源制御部とを中心とした説明を行い、上 記第一の実施形態と同一の点は上記と同様の符号を付して、その詳細な説明を省 略する。 [0097] 図 6に、第二の実施形態に係る X線画像撮影システム 1000の概略構成を示す。 図 6に示すように、操作入力部 2には、操作者により撮影準備指示や撮影指示を入 力する X線照射スィッチ 21と、操作者により指示内容を X線源制御部に入力する X線 源指示内容入力部 22と、操作者により指示内容をコンソールに入力するコンソール 指示内容入力部 23とが設けられている。ここで、指示内容には、 X線管電圧や X線 管電流、 X線照射時間等の X線撮影条件、撮影タイミング、撮影部位、撮影方法等の X線撮影制御条件、画像処理条件、画像出力条件、力セッテ選択情報、オーダ選択 情報、被写体 ID等がある。 In the second embodiment, the operation input unit and the X-ray source control unit will be mainly described, and the same points as in the first embodiment will be denoted by the same reference numerals as those in the first embodiment, and the details thereof will be described. The explanation is omitted. FIG. 6 shows a schematic configuration of an X-ray imaging system 1000 according to the second embodiment. As shown in FIG. 6, the operation input unit 2 has an X-ray irradiation switch 21 for inputting an imaging preparation instruction and an imaging instruction by an operator, and an X-ray source for inputting an instruction content to an X-ray source control unit by an operator. A source instruction content input unit 22 and a console instruction content input unit 23 for inputting the instruction content to the console by an operator are provided. The instructions include X-ray imaging conditions such as X-ray tube voltage, X-ray tube current, and X-ray irradiation time, X-ray imaging control conditions such as imaging timing, imaging region, and imaging method, image processing conditions, and images. Output conditions, force set selection information, order selection information, subject ID, etc.
[0098] X線照射スィッチ 21には、 X線源制御部 43及び入力部 12がそれぞれ接続して 、る 。 X線照射スィッチ 21には、撮影準備指示を入力する第一スィッチと、撮影指示を入 力する第二スィッチが設けられており、 X線照射スィッチ 21による指示が X線源制御 部 43及び入力部 12に入力される。 X線照射スィッチ 21は、第一スィッチに入力した 後、第二スィッチに入力できる構造になっている。  The X-ray irradiation switch 21 is connected to the X-ray source control unit 43 and the input unit 12, respectively. The X-ray irradiation switch 21 is provided with a first switch for inputting an imaging preparation instruction and a second switch for inputting an imaging instruction. The instruction by the X-ray irradiation switch 21 is input to the X-ray source control unit 43 and the input. Input to part 12. The X-ray irradiation switch 21 is structured such that it can be input to the second switch after being input to the first switch.
X線源指示内容入力部 22には、 X線源制御部 43が接続している。 X線源制御部 4 3は、 X線源指示内容入力部 22より入力された指示内容に基づき、高圧発生源 41及 び X線管 42を駆動制御する。  An X-ray source control unit 43 is connected to the X-ray source instruction content input unit 22. The X-ray source control unit 43 controls driving of the high-pressure source 41 and the X-ray tube 42 based on the instruction content input from the X-ray source instruction content input unit 22.
コンソール指示内容入力部 23には、入力部 12が接続している。入力部 12に入力 された指示内容は、コンソール制御部 13に送信される。コンソール制御部 13は、受 信した指示内容に基づき、コンソール 1及び力セッテ 5を駆動制御する。  An input unit 12 is connected to the console instruction content input unit 23. The instruction content input to the input unit 12 is transmitted to the console control unit 13. The console control unit 13 drives and controls the console 1 and the force set 5 based on the received instruction content.
[0099] コンソール制御部 13は、コンソール通信部 14が力セッテ通信部 52と無線中継器 6 との無線通信の通信状態が通信不能又は通信不良であると検出したことに基づき、 X線照射スィッチ 21を駆動制御して、操作者が第二スィッチを押下して撮影指示を 入力しても、 X線管 42に撮影指示を送信しないようにする。コンソール制御部 13は、 コンソール通信部 14が力セッテ通信部 52との無線通信の通信状態が通信不能又は 通信不良であると検出したときに、 X線源制御部 43を制御して、操作者が第ニスイツ チを押下して撮影指示を入力しても、 X線源制御部 43が撮影指示を受信しな ヽよう にしてもよい。  [0099] Based on the fact that the console communication unit 14 detects that the communication state of the wireless communication between the force set communication unit 52 and the wireless repeater 6 is incommunicable or poor communication, the console control unit 13 detects the X-ray irradiation switch. 21 is controlled so that the imaging instruction is not transmitted to the X-ray tube 42 even if the operator presses the second switch and inputs the imaging instruction. The console control unit 13 controls the X-ray source control unit 43 when the console communication unit 14 detects that the communication state of the wireless communication with the force set communication unit 52 is incommunicable or poor communication, and controls the operator Even if the user presses the first varnish switch and inputs an imaging instruction, the X-ray source control unit 43 may not receive the imaging instruction.
[0100] 次に、本発明の第二の実施形態による X線画像撮影システムによる動作について 説明する。 Next, the operation of the X-ray imaging system according to the second embodiment of the present invention explain.
[0101] 操作者は、 X線照射スィッチ 21の第一スィッチを押下して、撮影準備指示を入力す る。 X線源制御部 43は、第一スィッチによる撮影準備指示に基づき、高圧発生源 41 を駆動制御して X線管 42に高圧を印加する状態に移行させる。入力部 12に入力さ れた第一スィッチによる撮影準備指示に基づき、コンソール制御部 13は、コンソール 通信部 14及び無線中継器 6を介して力セッテ 5に撮影準備指示を送信する。カセッ テ制御部 53は、受信した撮影準備指示に基づき、撮影指示が入力されるまでリセッ トを所定間隔で繰り返し、暗電流によりコンデンサ 5424に電気エネルギーが蓄積さ れることを防止する。  [0101] The operator presses the first switch of the X-ray irradiation switch 21 and inputs an imaging preparation instruction. The X-ray source control unit 43 drives and controls the high-pressure generation source 41 based on an imaging preparation instruction by the first switch to shift to a state in which a high pressure is applied to the X-ray tube 42. Based on the imaging preparation instruction by the first switch input to the input unit 12, the console control unit 13 transmits an imaging preparation instruction to the force set 5 via the console communication unit 14 and the wireless repeater 6. The cassette control unit 53 repeats reset at a predetermined interval based on the received imaging preparation instruction until the imaging instruction is input, and prevents electric energy from being accumulated in the capacitor 5424 due to dark current.
[0102] 操作者は、 X線照射スィッチ 21の第二スィッチを押下し、撮影指示を入力する。 X 線源制御部 43は、第二スィッチによる撮影指示に基づき、高圧発生源 41を駆動制 御して X線管 42に高圧を印加し、放射線を発生させる。  [0102] The operator presses the second switch of the X-ray irradiation switch 21 and inputs an imaging instruction. The X-ray source control unit 43 drives and controls the high-pressure generation source 41 based on an imaging instruction by the second switch to apply a high pressure to the X-ray tube 42 to generate radiation.
入力部 12に入力された第一スィッチによる撮影準備指示に基づき、コンソール制 御部 13は、力セッテ 5を駆動制御し、 X線源 4から照射される放射線による撮影をす る。  Based on the imaging preparation instruction by the first switch input to the input unit 12, the console control unit 13 drives and controls the force set 5, and performs imaging with radiation emitted from the X-ray source 4.
[0103] X線源 4から照射される X線は、被写体を透過し、力セッテ 5に入射する。このカセッ テ 5に入射した X線に基づき、画像データが取得され、無線中継器 6とコンソール通 信部 14を介してコンソール 1に送信される。  X-rays irradiated from the X-ray source 4 pass through the subject and enter the force set 5. Based on the X-rays incident on the cassette 5, image data is acquired and transmitted to the console 1 via the wireless repeater 6 and the console communication unit 14.
[0104] 以上のように、第二の実施形態における X線画像撮影システム 1000は、コンソール 通信部 14がコンソール通信部 14と力セッテ通信部 52との通信不能を検出し、 X線源 4から X線を照射しな ヽようにすることができるので、放射線撮影画像が取得できず、 かつ被写体に本来不要な放射線の照射を防止して、効率的に撮影を行うことができ る。  As described above, in the X-ray imaging system 1000 according to the second embodiment, the console communication unit 14 detects the inability to communicate between the console communication unit 14 and the force set communication unit 52, and the X-ray source 4 Since X-rays can be prevented from being irradiated, a radiographic image cannot be acquired, and radiation can be performed efficiently by preventing unnecessary irradiation of radiation to the subject.
[0105] [上述の実施形態に共通する事]  [Common to the above embodiment]
以上のように、コンソールと無線通信を介して通信する力セッテ通信手段と、放射線 撮影により放射線画像データを得る放射線画像取得手段と、前記放射線画像取得 手段から得られた放射線画像データを前記力セッテ通信手段により送信させるカセッ テ制御手段とを有する力セッテと、前記力セッテと無線通信を介して通信するコンソ一 ル通信手段と、前記無線通信が通信不能な状態と検知した場合、放射線源の放射 線照射を防ぐように放射線インターロックを制御するコンソール制御手段とを有する 前記コンソールとを有する放射線画像撮影システムなので、コンソール通信部とカセ ッテ通信部との間の無線通信が通信不能な状態と検出した場合、放射線照射を防ぐ ように放射線インターロックを制御するので、無線通信不能なのに被写体に放射線 照射して被写体に余計な被爆をさせる事態の発生を抑えられる。 As described above, force set communication means for communicating with the console via wireless communication, radiation image acquisition means for obtaining radiation image data by radiography, and radiation image data obtained from the radiation image acquisition means are used for the force set communication. A force set having a cassette control means to be transmitted by the communication means, and a console that communicates with the force set via wireless communication. A radiographic imaging system comprising: a radio communication means; and a console control means for controlling a radiation interlock so as to prevent radiation irradiation of the radiation source when the wireless communication is detected to be in an incommunicable state. When the wireless communication between the console communication unit and the cassette communication unit is detected as being incommunicable, the radiation interlock is controlled to prevent radiation irradiation. Occurrence of extra exposure to the subject can be suppressed.
[0106] 更に、前記力セッテ制御手段が、前記放射線画像取得手段への電力供給の状態 を示す電力供給状態情報を前記力セッテ通信手段に前記コンソールへ送信させ、前 記コンソール制御手段が、前記コンソール通信手段により受信した前記電力供給情 報に応じて前記放射線インターロックを制御するので、放射線画像取得手段への電 力供給の状態に応じて、放射線インターロックを制御でき、放射線画像取得手段へ の電力供給の状態が放射線撮影に不適切な状態で放射線を照射して被写体に余 計な被爆をさせる事態の発生を抑えられる。  [0106] Further, the force set control means causes the force set communication means to transmit power supply state information indicating a state of power supply to the radiation image acquisition means to the console, and the console control means includes the console control means, Since the radiation interlock is controlled according to the power supply information received by the console communication means, the radiation interlock can be controlled according to the state of power supply to the radiation image acquisition means, and the radiation image acquisition means It is possible to suppress the occurrence of excessive exposure to the subject by irradiating radiation when the power supply state of the camera is inappropriate for radiography.
[0107] 更に、前記コンソール制御部は、前記コンソール通信手段により受信した前記電力 供給情報に応じて、表示手段が前記放射線画像取得手段への電力供給の状態を 示す表示をするように制御するので、放射線撮影をするのに暫く時間が必要な状態 か否カゝ操作者は表示手段の表示で確認でき、他の撮影業務との順番を適切に選択 できトータルとしての撮影効率が向上する。  [0107] Further, the console control unit controls the display unit to display the power supply state to the radiation image acquisition unit according to the power supply information received by the console communication unit. In addition, the operator can confirm whether or not it takes a while to perform radiography by checking the display on the display means, and can appropriately select the order with other radiographing operations, improving the total radiography efficiency.
[0108] 更に、前記力セッテは、前記放射線画像取得手段と前記力セッテ通信手段と前記 力セッテ制御手段に電力を供給する内部電源を有し、可搬型のケーブルレスである ので、放射線撮影時にケーブルが被写体に絡みつかないように、気を使ってカセッ テを取り回す必要が無ぐ操作者が放射線撮影に集中でき、撮影ミスが少なくなり、 被写体への余計な被爆をさせる事態の発生を抑えられつつ、トータルとしての撮影 効率が向上する。  [0108] Furthermore, the force set has an internal power supply for supplying power to the radiation image acquisition means, the force set communication means, and the force set control means, and is a portable cableless. An operator who does not need to carefully handle the cable so that the cable does not get tangled with the subject can concentrate on the radiography, reducing the number of imaging errors and causing an additional exposure to the subject. While being suppressed, the overall shooting efficiency is improved.
また、従来、力セッテは放射線遮蔽部材で覆われた放射線撮影室内に設置され、 他方、コンソールは放射線撮影室外に設置される場合が多 ヽ。  Conventionally, the force set is often installed in a radiography room covered with a radiation shielding member, while the console is often installed outside the radiography room.
しかし、更に、前記力セッテ通信部と無線通信可能な無線中継器を備え、前記コン ソール通信部が、通信ケーブルを介して前記無線中継器と通信可能であるので、当 該無線中継器を放射線撮影室内に設置することで、力セッテ通信部と無線中継器と の間で行われる無線通信を良好に行うことができる。 However, since it further includes a wireless repeater capable of wireless communication with the force set communication unit, the console communication unit can communicate with the wireless repeater via a communication cable. By installing the wireless repeater in the radiation imaging room, wireless communication performed between the force set communication unit and the wireless repeater can be satisfactorily performed.
[0109] また、従来、力セッテが放射線撮影室内で、コンソールが放射線撮影室外に設置さ れる通常の場合においては、操作者は、放射線撮影に際して放射線撮影室内で被 写体に撮影位置等の指示を行 ヽ、その後放射線撮影室外に移動してその被写体の 放射線撮影を開始させながら、放射線画像を確認したり放射線画像データに対する 画像処理を開始させたりする。  [0109] Also, conventionally, in a normal case where the force set is in the radiography room and the console is installed outside the radiography room, the operator instructs the subject in the radiography room to indicate the photographing position, etc. Then, move outside the radiography room and start radiography of the subject, confirming the radiographic image and starting image processing for the radiographic image data.
しかし、更に、前記コンソールは、前記コンソール通信手段が前記無線中継器と無 線通信を介して通信する携帯端末であるので、放射線撮影室内で被写体に撮影位 置等について指示しながら、当該コンソールで放射線画像を確認したり、放射線画 像データの画像処理を開始させたりすることができる。そのため、放射線撮影、放射 線画像の確認、画像処理のサイクルを繰り返す放射線撮影全体のトータルの撮影効 率を向上させることができる。  However, since the console is a portable terminal in which the console communication means communicates with the wireless repeater via wireless communication, the console is instructed to the subject in the radiation imaging room about the imaging position and the like. You can check the radiation image and start image processing of the radiation image data. Therefore, it is possible to improve the total imaging efficiency of the entire radiography that repeats the cycle of radiography, confirmation of the radiographic image, and image processing.
[0110] 更に、力セッテは放射線画像データを一時的に保存するメモリを備えているので、 取得した放射線画像データを一旦メモリに保存でき、通信不良や通信不能な状態で あっても、通信状態が良くなるまで放射線撮影を遅らせる必要がなぐそのメモリに保 存した放射線画像データを、力セッテとコンソールとの間の通信状態に応じた通信速 度で、力セッテ力もコンソールに送信することができる。  [0110] Furthermore, since the force set is equipped with a memory for temporarily storing radiation image data, the acquired radiation image data can be temporarily stored in the memory, and even if communication is poor or communication is not possible, It is not necessary to delay radiography until the quality improves, and the radiographic image data stored in the memory can be transmitted to the console at the communication speed according to the communication status between the force set and the console. .
[0111] また、コンソールであって、前記コンソールと無線通信を介して通信する力セッテ通 信手段と、放射線撮影により放射線画像データを得る放射線画像取得手段と、前記 放射線画像取得手段から得られた放射線画像データを前記力セッテ通信手段により 送信させる力セッテ制御手段とを有する力セッテと無線通信を介して通信するコンソ ール通信手段と、前記無線通信が通信不能な状態と検知した場合、放射線源の放 射線照射を防ぐように放射線インターロックを制御するコンソール制御手段とを有す るコンソールなので、コンソール通信部と力セッテ通信部との間の無線通信が通信不 能な状態と検出した場合、放射線照射を防ぐように放射線インターロックを制御する ので、無線通信不能なのに被写体に放射線照射して被写体に余計な被爆をさせる 事態の発生を抑えられる。 [0112] 更に、前記力セッテ制御手段が、前記放射線画像取得手段への電力供給の状態 を示す電力供給状態情報を前記力セッテ通信手段に前記コンソールへ送信させるも のであり、前記コンソール制御手段が、前記コンソール通信手段により受信した前記 電力供給情報に応じて前記放射線インターロックを制御するので、放射線画像取得 手段への電力供給の状態に応じて、放射線インターロックを制御でき、放射線画像 取得手段への電力供給の状態が放射線撮影に不適切な状態で放射線を照射して 被写体に余計な被爆をさせる事態の発生を抑えられる。 [0111] Further, the console is a force set communication unit that communicates with the console via wireless communication, a radiological image acquisition unit that acquires radiographic image data by radiography, and the radiographic image acquisition unit. Console communication means that communicates via wireless communication with a force set having force set control means for transmitting radiation image data by the force set communication means; and When it is detected that wireless communication between the console communication unit and the force set communication unit is not possible because the console has a console control unit that controls the radiation interlock so as to prevent radiation from the source. Because the radiation interlock is controlled to prevent radiation exposure, the subject is irradiated with radiation even though wireless communication is not possible. It is suppressed the occurrence of a situation that makes the Do not exposure. [0112] Further, the force set control means causes the force set communication means to transmit power supply state information indicating a state of power supply to the radiation image acquisition means to the console, and the console control means Since the radiation interlock is controlled according to the power supply information received by the console communication means, the radiation interlock can be controlled according to the state of power supply to the radiation image acquisition means, and the radiation image acquisition means It is possible to suppress the occurrence of excessive exposure to the subject by irradiating radiation when the power supply state of the camera is inappropriate for radiography.
[0113] 更に、前記コンソール制御部は、前記コンソール通信手段により受信した前記電力 供給情報に応じて、表示手段が前記放射線画像取得手段への電力供給の状態を 示す表示をするように制御するので、コンソール制御部は、力セッテ電源の電力供給 状態を表示部に表示することができ、放射線撮影をするのに暫く時間が必要な状態 か否カゝ操作者は表示手段の表示で確認できるので、他の撮影業務との順番を適切 に選択できトータルとしての撮影効率が向上する。  [0113] Further, the console control unit controls the display unit to display the power supply state to the radiation image acquisition unit according to the power supply information received by the console communication unit. The console control unit can display the power supply status of the power set power supply on the display unit, so that the operator can confirm whether or not a certain time is required for radiography by displaying on the display means. Therefore, it is possible to appropriately select the order with other shooting tasks, and the total shooting efficiency is improved.
[0114] また、コンソールのコンピュータで実行されるプログラムであって、前記コンソールと 無線通信を介して通信する力セッテ通信手段と、放射線撮影により放射線画像デー タを得る放射線画像取得手段と、前記放射線画像取得手段から得られた放射線画 像データを前記力セッテ通信手段により送信させる力セッテ制御手段とを有するカセ ッテと無線通信を介して通信するコンソール通信手段を有する前記コンソールの前 記コンピュータに、前記無線通信が通信不能な状態力否力検知する通信状態検知 ステップと、前記無線通信が通信不能な状態と検知した場合、放射線源の放射線照 射を防ぐように放射線インターロックを制御するインターロック制御ステップとを実現さ せるためのプログラムなので、コンソールのコンピュータで実行される事により、コンソ ール通信部と力セッテ通信部との間の無線通信が通信不能な状態と検出した場合、 放射線照射を防ぐように放射線インターロックを制御するので、無線通信不能なのに 被写体に放射線照射して被写体に余計な被爆をさせる事態の発生を抑えられる。  [0114] Further, a program executed by a console computer, which is a force set communication unit that communicates with the console via wireless communication, a radiation image acquisition unit that obtains radiation image data by radiography, and the radiation The computer of the console having console communication means for communicating via wireless communication with a cassette having force set control means for transmitting the radiation image data obtained from the image acquisition means by the force set communication means. A communication state detecting step for detecting a force or a force of a state in which the wireless communication cannot be performed; and an interface for controlling a radiation interlock so as to prevent radiation irradiation of the radiation source when the wireless communication is detected to be in a state in which communication is not possible. This is a program that realizes the lock control step. As a result, when the wireless communication between the console communication unit and the force set communication unit is detected as being in an incommunicable state, the radiation interlock is controlled so as to prevent radiation exposure. It is possible to suppress the occurrence of a situation where the subject is exposed to radiation and causes the subject to be exposed further.
[0115] 更に、前記力セッテ制御手段が、前記放射線画像取得手段への電力供給の状態 を示す電力供給状態情報を前記力セッテ通信手段に前記コンソールへ送信させるも のであり、更に、前記コンソール通信手段により受信した前記電力供給情報を評価 する電力供給情報評価ステップと、前記電力供給情報の評価の結果に応じて前記 放射線インターロックを制御する第二インターロック制御ステップとを実現するための プログラムなので、コンソールのコンピュータで実行される事により、放射線画像取得 手段への電力供給の状態に応じて、放射線インターロックを制御するので、放射線 画像取得手段への電力供給の状態が放射線撮影に不適切な状態で放射線を照射 して被写体に余計な被爆をさせる事態の発生を抑えられる。 [0115] Further, the force set control means causes the force set communication means to transmit power supply state information indicating a state of power supply to the radiation image acquisition means to the console. Further, the console communication Evaluating the power supply information received by the means And a second interlock control step for controlling the radiation interlock according to the evaluation result of the power supply information. Because the radiation interlock is controlled according to the state of power supply to the radiation image acquisition means, the radiation supply to the radiation image acquisition means is unsuitable for radiation imaging, and radiation is applied to the subject. The occurrence of an accidental exposure is suppressed.
[0116] 更に、前記コンソールのコンピュータが表示手段を制御するものであり、更に、前記 電力供給情報の評価の結果に応じて、前記放射線画像取得手段への電力供給の 状態を示す表示を前記表示手段がするように制御する表示制御ステップを実現する ためのプログラムなので、コンソールのコンピュータで実行される事により、カセッテ電 源の電力供給状態を表示部に表示することができ、放射線撮影をするのに暫く時間 が必要な状態カゝ否か操作者は表示手段の表示で確認できるので、他の撮影業務と の順番を適切に選択できトータルとしての撮影効率が向上する。  [0116] Further, the computer of the console controls the display means, and further, according to the result of evaluation of the power supply information, the display showing the state of power supply to the radiation image acquisition means This is a program that realizes the display control step that is controlled by the means, so that the power supply status of the cassette power supply can be displayed on the display unit when it is executed by the console computer, and radiation imaging is performed. Therefore, the operator can confirm whether or not the status is necessary for a while by checking the display on the display means, so that the order with other shooting tasks can be selected appropriately, and the total shooting efficiency is improved.
[0117] なお、明細書、請求の範囲、図面及び要約を含む 2005年 3月 25日に出願された 日本特許出願 No. 2005— 88729号の全ての開示は、そのまま本出願の一部に組 み込まれる。  [0117] The entire disclosure of Japanese Patent Application No. 2005-88729 filed on March 25, 2005, including the description, claims, drawings, and abstract, is incorporated in part in this application. Expected.
産業上の利用可能性  Industrial applicability
[0118] 以上に記載したように、本発明は、放射線画像撮影を行う分野、特に、医療分野に おいて利用可能である。 [0118] As described above, the present invention can be used in the field of radiographic imaging, particularly in the medical field.
符号の説明  Explanation of symbols
[0119] 1000 X線画像撮影システム [0119] 1000 X-ray imaging system
1 コンソ一ノレ  1 Console
11 表示制御部  11 Display controller
12 入力部  12 Input section
13 コンソール制御部  13 Console control
14 コンソール通信部  14 Console communication section
17 コンソール電源部  17 Console power supply
18 ネットワーク通信部 操作入力部 18 Network Communication Department Operation input section
X線照射スィッチ  X-ray irradiation switch
X線源指示内容入力部 コンソール指示内容入力部 表示部  X-ray source instruction content input section Console instruction content input section Display section
X線源 X-ray source
高圧発生源  High pressure source
X線管  X-ray tube
X線源制御部  X-ray source controller
力セッテ Force set
内部電源  Internal power supply
力セッテ通信部  Force set communication section
力セッテ制御部  Force setting controller
データ変換部  Data converter
メモリ  memory
無線中継器 Wireless repeater

Claims

請求の範囲 The scope of the claims
[1] コンソールと無線通信を介して通信する力セッテ通信手段と、放射線撮影により放 射線画像データを得る放射線画像取得手段と、前記放射線画像取得手段から得ら れた放射線画像データを前記力セッテ通信手段により送信させる力セッテ制御手段 とを有する力セッテと、  [1] Force set communication means that communicates with the console via wireless communication, radiation image acquisition means for obtaining radiation image data by radiography, and radiation image data obtained from the radiation image acquisition means A force set having force set control means for transmitting by communication means;
前記力セッテと無線通信を介して通信するコンソール通信手段と、前記無線通信が 通信不能な状態と検知した場合、放射線源の放射線照射を防ぐように放射線インタ 一ロックを制御するコンソール制御手段とを有する前記コンソールと  Console communication means for communicating with the force set via wireless communication, and console control means for controlling a radiation interlock so as to prevent radiation irradiation of a radiation source when the wireless communication is detected to be in an incommunicable state. Having said console and
を有する放射線画像撮影システム。  A radiographic imaging system comprising:
[2] 前記力セッテ制御手段が、前記放射線画像取得手段への電力供給の状態を示す 電力供給状態情報を前記力セッテ通信手段に前記コンソールへ送信させ、 前記コンソール制御手段が、前記コンソール通信手段により受信した前記電力供 給情報に応じて前記放射線インターロックを制御する請求の範囲第 1項に記載の放 射線画像撮影システム。  [2] The force set control unit causes the power set communication unit to transmit power supply state information indicating a state of power supply to the radiation image acquisition unit to the console, and the console control unit includes the console communication unit. The radiation image capturing system according to claim 1, wherein the radiation interlock is controlled in accordance with the power supply information received by the computer.
[3] 前記コンソール制御部は、前記コンソール通信手段により受信した前記電力供給 情報に応じて、表示手段が前記放射線画像取得手段への電力供給の状態を示す 表示をするように制御することを特徴とする請求の範囲第 2項に記載の放射線画像 撮影システム。  [3] The console control unit controls the display unit to display the power supply state to the radiation image acquisition unit according to the power supply information received by the console communication unit. The radiation image capturing system according to claim 2, wherein:
[4] 前記力セッテは、前記放射線画像取得手段と前記力セッテ通信手段と前記カセッ テ制御手段に電力を供給する内部電源を有し、可搬型のケーブルレスであることを 特徴とする請求の範囲第 1項力 請求の範囲第 3項のいずれか一項に記載の放射 線画像撮影システム。  4. The force set has an internal power supply for supplying power to the radiation image acquisition unit, the force set communication unit, and the cassette control unit, and is portable and cableless. Range first term force Radiation imaging system according to any one of claims 3.
[5] 前記力セッテ通信部と無線通信可能な無線中継器を備え、  [5] A wireless repeater capable of wireless communication with the force set communication unit,
前記コンソール通信部が、通信ケーブルを介して前記無線中継器と通信可能であ る請求の範囲第 1項力 請求の範囲第 4項のいずれか一項に記載の放射線画像撮 影システム。  5. The radiographic imaging system according to claim 1, wherein the console communication unit can communicate with the wireless repeater via a communication cable.
[6] 前記コンソールは、前記コンソール通信手段が前記無線中継器と無線通信を介し て通信する携帯端末であることを特徴とする請求の範囲第 5項に記載の放射線画像 撮影システム。 6. The radiographic image according to claim 5, wherein the console is a portable terminal in which the console communication means communicates with the wireless repeater via wireless communication. Shooting system.
[7] 前記力セッテは放射線画像データを一時的に保存するメモリを備えたことを特徴と する請求の範囲第 1項力 請求の範囲第 5項のいずれか一項に記載の放射線画像 撮影システム。  [7] The radiographic image capturing system according to any one of claims 1 to 5, wherein the force set includes a memory for temporarily storing radiographic image data. .
[8] コンソールであって、  [8] A console,
前記コンソールと無線通信を介して通信する力セッテ通信手段と、放射線撮影によ り放射線画像データを得る放射線画像取得手段と、前記放射線画像取得手段から 得られた放射線画像データを前記力セッテ通信手段により送信させる力セッテ制御 手段とを有する力セッテと無線通信を介して通信するコンソール通信手段と、 前記無線通信が通信不能な状態と検知した場合、放射線源の放射線照射を防ぐよ うに放射線インターロックを制御するコンソール制御手段とを有するコンソール。  Force set communication means for communicating with the console via wireless communication, radiation image acquisition means for obtaining radiation image data by radiography, and radiation image data obtained from the radiation image acquisition means for the force set communication means Console communication means for communicating via a wireless communication with a force set having a force set control means for transmitting by means of a radiation interlock to prevent radiation exposure of the radiation source when the wireless communication is detected to be in an incommunicable state Console having a console control means for controlling.
[9] 前記力セッテ制御手段が、前記放射線画像取得手段への電力供給の状態を示す 電力供給状態情報を前記力セッテ通信手段に前記コンソールへ送信させるものであ り、  [9] The force set control unit causes the force set communication unit to transmit power supply state information indicating a state of power supply to the radiation image acquisition unit to the console.
前記コンソール制御手段が、前記コンソール通信手段により受信した前記電力供 給情報に応じて前記放射線インターロックを制御する請求の範囲第 8項に記載のコ ンソール。  9. The console according to claim 8, wherein the console control means controls the radiation interlock according to the power supply information received by the console communication means.
[10] 前記コンソール制御部は、前記コンソール通信手段により受信した前記電力供給 情報に応じて、表示手段が前記放射線画像取得手段への電力供給の状態を示す 表示をするように制御することを特徴とする請求の範囲第 9項に記載のコンソール。  [10] The console control unit controls the display unit to display the power supply state to the radiation image acquisition unit according to the power supply information received by the console communication unit. A console according to claim 9.
[11] コンソールのコンピュータで実行されるプログラムであって、 [11] A program executed on a console computer,
前記コンソールと無線通信を介して通信する力セッテ通信手段と、放射線撮影によ り放射線画像データを得る放射線画像取得手段と、前記放射線画像取得手段から 得られた放射線画像データを前記力セッテ通信手段により送信させる力セッテ制御 手段とを有する力セッテと無線通信を介して通信するコンソール通信手段を有する前 記コンノールの前記コンピュータに、  Force set communication means for communicating with the console via wireless communication, radiation image acquisition means for obtaining radiation image data by radiography, and radiation image data obtained from the radiation image acquisition means for the force set communication means The computer of the aforementioned Connole having console communication means for communicating via a wireless communication with a force set having a force set control means for transmitting by
前記無線通信が通信不能な状態か否か検知する通信状態検知ステップと、 前記無線通信が通信不能な状態と検知した場合、放射線源の放射線照射を防ぐよ うに放射線インターロックを制御するインターロック制御ステップとを実現させるための プログラム。 A communication state detecting step for detecting whether or not the wireless communication is in an incommunicable state; and when detecting that the wireless communication is in an incommunicable state, radiation irradiation of the radiation source is prevented. A program for realizing the interlock control step for controlling the radiation interlock.
[12] 前記力セッテ制御手段が、前記放射線画像取得手段への電力供給の状態を示す 電力供給状態情報を前記力セッテ通信手段に前記コンソールへ送信させるものであ り、  [12] The force set control means causes the force set communication means to transmit power supply state information indicating a state of power supply to the radiation image acquisition means to the console,
更に、  Furthermore,
前記コンソール通信手段により受信した前記電力供給情報を評価する電力供給情 報評価ステップと、  A power supply information evaluation step for evaluating the power supply information received by the console communication means;
前記電力供給情報の評価の結果に応じて前記放射線インターロックを制御する第 二インターロック制御ステップとを実現するための請求の範囲第 11項に記載のプログ ラム。  12. The program according to claim 11, for realizing a second interlock control step of controlling the radiation interlock according to a result of evaluation of the power supply information.
[13] 前記コンソールのコンピュータが表示手段を制御するものであり、  [13] The console computer controls the display means,
更に、前記電力供給情報の評価の結果に応じて、前記放射線画像取得手段への 電力供給の状態を示す表示を前記表示手段がするように制御する表示制御ステップ を実現するための請求の範囲第 12項に記載のプログラム。  And a display control step for controlling the display means so that the display means displays the power supply status to the radiation image acquisition means in accordance with the evaluation result of the power supply information. The program according to item 12.
PCT/JP2006/306149 2005-03-25 2006-03-27 Radiation image acquisition system, console, and program executed in console WO2006101233A1 (en)

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