CN111796317A - Radiation absorption amount management device and radiation absorption amount management method - Google Patents
Radiation absorption amount management device and radiation absorption amount management method Download PDFInfo
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Abstract
An absorbed radiation amount management device and an absorbed radiation amount management method manage the amount of radiation absorbed by vital organs of medical staff. The absorbed radiation amount management device includes: a radiation amount spatial distribution information acquisition unit that acquires information relating to a radiation amount spatial distribution calculated based on imaging conditions corresponding to imaging performed by the radiographic image diagnostic device; a position information acquiring unit that acquires position information of a part of a medical staff near the radiographic image diagnostic apparatus in the radiation dose spatial distribution; a radiation amount information acquiring unit that acquires information relating to an amount of radiation received by the part, based on the positional information; and a display control unit that controls the display unit to display information relating to the radiation amount.
Description
Technical Field
The present invention relates to an absorbed radiation amount management device and an absorbed radiation amount management method, and more particularly, to an absorbed radiation amount management device and an absorbed radiation amount management method capable of reducing or avoiding an amount of radiation absorbed by medical staff.
Background
In a medical field where radiography is performed, it is known that radiation exposure is given to a patient by radiography. In recent years, attention has been paid to the management of the radiation dose of a patient. Therefore, it is necessary to store the radiation dose received by the patient due to radiography, and to grasp and manage the accumulated radiation dose of the patient.
As a method of measuring the radiation dose received by a patient, for example, a method of providing an area dose to a radiation source that emits radiation and obtaining the radiation dose of the patient based on a value measured by the dose, and a method of acquiring the radiation dose of the patient using an image signal detected by a radiation image detector that detects a radiation image of the patient are proposed (for example, see patent document 1).
However, there are also medical staff who are present in the medical field as with the patient and who perform the interventional procedure. Therefore, protection of medical personnel is also beginning to be valued.
As a method for protecting medical staff, a method of displaying a spatial distribution of an amount of radiation in a room and a position where the medical staff is located during angiography on a display in order to improve vigilance of the medical staff (for example, see patent document 2), and a method of detecting an entire dose rate of an individual using a dose sensor (for example, see patent document 3) have been proposed.
However, the above method has a problem that organs such as eyes and thyroid of medical staff are sensitive to the amount of radiation, and the threshold set for these organs is lower than the overall threshold. Therefore, even if the total amount of radiation does not exceed the threshold, the organ may be exposed to radiation that exceeds its own safety threshold. Thus, merely displaying the location of medical personnel or estimating the overall dosage rate of an individual may not accurately account for the risk of being irradiated.
In contrast, patent document 4 mentions that the amount of radiation is analyzed for an important organ. However, in patent document 4, the spatial distribution of the radiation amount is not measured in real time, but a spatial distribution model of the radiation amount stored in advance is retrieved from a database, and the radiation amount of each organ is calculated based on the spatial distribution model of the radiation amount stored in advance.
Documents of the prior art
Patent document
Patent document 1: WO2012/164932
Patent document 2: japanese patent laid-open No. 2005-253689
Patent document 3: US8581,214
Patent document 4: JP 5072662B2
Disclosure of Invention
The present invention has been made to solve the above-described problems, and provides an absorbed radiation amount management apparatus and an absorbed radiation amount management method that can display the amount of radiation that each vital organ receives while a medical staff is operating a radiographic image diagnostic apparatus, and that can guide the medical staff to reduce the amount of radiation based on imaging conditions of the radiographic image diagnostic apparatus and the like.
An absorbed radiation amount management device according to an aspect includes: a radiation amount spatial distribution information acquisition unit that acquires information relating to a radiation amount spatial distribution calculated based on imaging conditions corresponding to imaging performed by the radiographic image diagnostic device; a position information acquiring unit that acquires position information of a part of a medical staff near the radiographic image diagnostic apparatus in the radiation dose spatial distribution; a radiation amount information acquiring unit that acquires information relating to an amount of radiation received by the part, based on the positional information; and a display control unit that controls the display unit to display information relating to the radiation amount.
With the above configuration, the spatial distribution of the radiation dose can be calculated in real time based on the imaging conditions corresponding to the diagnostic process performed by the radiographic image diagnostic apparatus, such as the scan parameters, the body size and the body position of the patient, the radiation dose to which the vital organ of the medical staff is exposed can be specified according to the specific position of the vital organ in the spatial distribution, and the radiation dose can be displayed on the display, so that the medical staff can grasp the radiation exposure level of the vital organ of the medical staff in time during the operation of the radiographic image diagnostic apparatus, thereby managing the radiation dose for the vital organ. The radiation quantity of the specific organ can be measured and displayed in real time, so that medical personnel can intuitively feel and remind the medical personnel, and the specific organ is prevented from being influenced by excessive radiation.
In the radiation absorption amount management device, the position information acquisition unit may acquire position information of the part of the medical staff in the radiation amount spatial distribution based on posture information of the medical staff in the radiation amount spatial distribution.
In the absorbed radiation dose management apparatus, the position information acquisition unit may acquire posture information of the spatial distribution of the radiation dose of the medical staff by a motion detection mechanism, and acquire position information of the part of the medical staff in the spatial distribution of the radiation dose based on the posture information.
In the radiation absorption amount management device, the position information acquisition unit may further acquire position information of a part of the medical staff in the radiation amount spatial distribution based on anatomical position information corresponding to the medical staff.
In the radiation absorption amount management device, the position information acquisition unit may track the medical staff moving during the examination to acquire the position information of the medical staff.
The radiation absorption amount management device may further include a guidance information output unit that provides guidance information to the medical staff based on imaging conditions before the start of imaging, thereby reducing or avoiding the amount of absorbed radiation.
With the above configuration, it is possible to provide guidance information such as changing a station, wearing a protector, and the like to the medical staff in accordance with imaging conditions such as scan parameters in an input scan protocol before radiation is released, and it is possible to effectively avoid or reduce the radiation amount of radiation received by the medical staff during an interventional operation.
In the radiation absorption amount management apparatus, the imaging conditions may include scan parameters and information on a patient.
With the above configuration, guidance information can be provided to medical staff while comprehensively considering the scan parameters and patient information relating to the body shape, body position, and the like of the patient.
The absorption radiation amount management device may further include a correction unit that corrects the radiation amount spatial distribution based on a correction factor obtained by the imaging unit, the correction factor including at least one of information relating to a medical staff and information relating to a patient.
With the above configuration, the spatial distribution of the radiation dose can be corrected in real time based on the information on the medical staff and the patient obtained by the camera, for example, the number of the medical staff, the relative positional relationship of the medical staff with respect to the X-ray emitter, the use condition of the medical staff's protective equipment, the body type of the patient, and other environmental information, and the radiation dose of the radiation to which the specific organ has been subjected can be obtained more accurately than in the case where the correction model is simply called from the database in the related art.
The radiation absorption amount management device may further include an alarm unit that generates an alarm by displaying or presenting an alarm by sound on the display unit when the amount of radiation received after the start of the imaging exceeds a predetermined threshold. In the absorbed radiation amount management apparatus, the guidance information output unit may output the guidance information when the amount of radiation received after the start of the imaging exceeds a preset threshold.
Through the structure, whether the radiation quantity received by the medical staff exceeds the preset safety range can be judged, and the medical staff can be reminded when the radiation quantity exceeds the safety range, so that the medical staff can play a role in reminding even if the medical staff neglects the management of the radiation quantity. When the amount of radiation received exceeds the safe range, the guidance information output by the guidance information output unit may be guidance information having the same level of protection as the initial guidance information output before the start of shooting, or guidance information subsequent to the initial guidance information and having a higher level of protection than the initial guidance information.
In the absorbed radiation dose management apparatus, the display unit may display a cumulative radiation dose of the plurality of vital organs in each operation. The display unit may display the guidance information provided to the medical staff. The display unit may highlight the detected vital organ based on a detection result of the position detection. The display unit may display the real-time spatial distribution of the radiation amount and the position of the medical staff with the vital organs highlighted on the plurality of image data, and guide the medical staff to a safe working position.
With the above configuration, by highlighting the vital organs and the cumulative radiation amount received by the vital organs, it is possible to quickly grasp the magnitude of the radiation amount received by each of the vital organs, and to take preventive measures with pertinence.
The radiation absorption amount management device may further include a storage unit that stores a plurality of pieces of image information related to movement of the medical staff. The storage unit stores the image related to the movement of the medical staff captured by the imaging unit, and the stored dynamic information related to the medical staff can be displayed on the display unit in combination with the spatial distribution of the radiation amount.
The radiation absorption amount management device may further include: a radiation amount simulation unit that generates a three-dimensional simulation diagram of spatial distribution of the amount of radiation in the room; a storage unit that stores moving image data relating to the movement of the medical staff and the amount of radiation received by the part; and a video stream generating unit that generates a video stream in which the moving image data and the three-dimensional simulation diagram are combined.
During the scanning by the radiographic image diagnostic apparatus, the entire operation procedure in the room is captured by the camera, the captured moving image concerning the movement of the medical staff is stored, the medical staff as the target object is extracted from the moving image, the radiation dose of the specific organ calculated by the radiation dose information acquiring unit is applied to the extracted moving image, and then the position of the medical staff and the radiation dose received by the organ are displayed on the three-dimensional simulated view of the radiation dose. Through the structure, not only can medical staff visually see the cross relation between each important organ and the radiation volume space distribution information and the radiation volume received by each important organ in the interventional operation process, thereby improving the safety awareness of the medical staff to the medical staff, but also can use the generated video stream for safety training after the operation.
In the radiation absorption amount management apparatus, the display unit may display the video stream so as to guide the medical staff to a safe position.
With the above configuration, medical staff involved in a surgery or inexperienced staff attending training can select a safe position based on the display of the display unit.
The technical scheme relates to a radiation absorption management method which comprises the following steps: a radiation amount spatial distribution information acquisition step of acquiring information on a radiation amount spatial distribution calculated based on imaging conditions corresponding to imaging performed by the radiographic image diagnostic apparatus; a position information acquisition step of acquiring position information of a part of a medical staff around the radiographic image diagnostic apparatus in the radiation dose spatial distribution; a radiation amount information acquisition step of acquiring information relating to the amount of radiation received by the part based on the positional information; and a display control step of controlling the display unit to display information relating to the radiation amount.
Drawings
Fig. 1 is a schematic diagram showing an absorbed radiation amount management system including an absorbed radiation amount management device according to embodiment 1 of the present invention.
Fig. 2 is a schematic diagram showing the amount of radiation of the medical staff displayed on the display unit.
Fig. 3 is a flowchart showing a management flow of the absorbed radiation amount management apparatus according to embodiment 1 of the present invention.
FIG. 4 illustrates a method of capturing gesture information of a moving object by loading a model to capture a motion trajectory.
Fig. 5 is a schematic diagram showing an absorbed radiation amount management system including an absorbed radiation amount management device according to embodiment 2 of the present invention.
Fig. 6 is a schematic diagram showing an absorbed radiation amount management system including an absorbed radiation amount management device according to embodiment 3 of the present invention.
Fig. 7A schematically shows a moving image stored in the storage unit according to embodiment 3 of the present invention. Fig. 7B is a diagram showing a video stream generated by the video stream generating unit according to embodiment 3 of the present invention.
Fig. 8 is a schematic diagram showing the simultaneous display of the amount of radiation to which an important organ is subjected and the video stream generated by the video stream generating section.
Detailed Description
The following detailed description of the embodiments of the present invention is provided in conjunction with the accompanying drawings. The embodiments described in the present invention are merely examples, and are not limited to the configurations described in the embodiments.
In the following embodiments, a case where X-rays are emitted during an interventional operation is described as an example, and the present invention can be applied to, for example, cardiac angiography and treatment, imaging of the digestive system, joint imaging, biopsy, and the like. However, the above description is merely exemplary and is not intended to limit the scope of the present invention. The present invention is intended to cover any medical staff who may be affected by radiation.
(embodiment mode 1)
Fig. 1 is a schematic diagram showing an absorbed radiation amount management system including an absorbed radiation amount management device according to embodiment 1 of the present invention.
As shown in fig. 1, the absorbed radiation amount management system 1000 includes a radiographic imaging device (radiographic image diagnostic device) 200 that images a patient, and an absorbed radiation amount management device 100 that manages the amount of radiation received by medical staff.
As the configuration of the radiographic imaging device 200, a configuration may be adopted in which the patient is imaged in a state of lying down, or a configuration may be adopted in which the patient is imaged in a state of lying down.
The radiographic imaging device 200 includes a scan parameter setting unit 201 and a radiation irradiation unit 202. The scan parameter setting unit 201 sets scan parameters corresponding to a scan protocol selected by a medical staff, based on the scan protocol. The scan protocol is a set of a plurality of scan parameters for performing a predetermined scan task, and in general, the scan protocol may also be understood as one scan task. When the scan protocol is determined, a plurality of scan parameters corresponding thereto are also determined, initial values of the plurality of scan parameters are defined in advance, and the scan may be performed using the initial values of the respective scan parameters during the scan, or may be performed using values input by medical staff. However, it is preferable that the initial values of the scan parameters are adjusted and input by the medical staff according to the actual situation.
The radiation irradiation unit 202 receives the values of the respective scan parameters set by the scan parameter setting unit 201, emits radiation from an X-ray irradiation unit such as an X-ray tube bulb on the basis of the values of the scan parameters, irradiates the radiation onto a patient, detects and stores a radiation image signal representing a radiation image of the patient by a radiation image detector, not shown, and analyzes or image-processes the radiation image of the patient.
The absorbed radiation amount management device 100 includes a radiation amount spatial distribution information acquisition unit 102, a position information acquisition unit 103, a radiation amount information acquisition unit 104, and a display control unit 105. The radiation dose spatial distribution information acquiring unit 102 acquires the radiation dose spatial distribution information in the room based on the radiation from the radiation irradiating unit 202 after the setting by the scan parameter setting unit 201 is completed. The radiation amount spatial distribution information is information on a radiation amount spatial distribution calculated based on an imaging condition corresponding to imaging performed by the radiographic image diagnostic apparatus. That is, after the respective scan parameters included in each scan job (scan protocol) to be executed by the radiographic image diagnostic apparatus are determined, the imaging to be executed by the radiation irradiating section 202 is also determined. Here, the imaging conditions may be the scan parameters set by the scan parameter setting unit 201, or may include environmental information other than the scan parameters, for example, information about the patient.
The positional information acquiring unit 103 acquires positional information of a part of the medical staff around the radiographic image diagnostic apparatus in the radiation dose spatial distribution. Specifically, posture information of a medical staff is acquired by tracking the movement of the medical staff around the radiographic image diagnostic apparatus by a camera, not shown, and position information of the medical staff in the operation room is specified. The position of the above-mentioned vital organs on the human body can be obtained with reference to the anatomical position distribution.
The radiation dose information acquiring unit 104 is connected to the radiation dose spatial distribution information acquiring unit 102 and the position information acquiring unit 103, and after the position information acquiring unit 103 acquires the position information of the vital organs of the medical staff in the radiation dose spatial distribution, calculates and acquires the radiation dose of the radiation received by the vital organs of the medical staff, based on the position information, the radiation dose is preferably the cumulative radiation dose of each vital organ in each operation, because the cumulative radiation dose is more effective for the management of the absorbed radiation dose than the instantaneous radiation dose.
The display control unit 105 causes the display unit to display information on the radiation dose received by the vital organ of the medical staff, which is the result calculated by the radiation dose information acquisition unit 104. The medical staff in the present embodiment may be 1 person or a plurality of persons, and in the case of a plurality of persons, the display may display the amount of radiation received by each person.
Fig. 2 is a schematic diagram showing the amount of radiation of the medical staff displayed on the display unit. In the present embodiment, the position information acquisition unit 103 detects the position of the vital organ of the medical staff, and the display unit highlights the vital organ based on the detection result of the position detection. The manner of highlighting shown in fig. 2 is only an example, and the manner of displaying can be adjusted as necessary.
In fig. 2, the parts marked with the patterns represent vital organs of medical staff. The right pattern mark indicates the intensity of the radiation from the top to the bottom, and different patterns are used as marks in fig. 2 for convenience of explanation, and actually, the colors can be indicated from dark to light in order to make the medical staff clearly know the intensity of the radiation received by the staff. The right-hand medical staff (sector 1) is closer to the operating table in the figure and therefore receives more radiation than the left-hand medical staff (sector 2). By displaying the radiation amount of an important organ on a display unit such as a display in real time during the operation, medical staff can be given sufficient attention to avoid or reduce the radiation amount.
The absorbed radiation amount management device 100 may further include a guidance information output unit 101.
The guidance information output unit 101 receives the scan parameters set by the scan parameter setting unit 201 and specific numerical values corresponding to the scan parameters before the radiation irradiation unit 202 starts irradiation with radiation, extracts guidance information corresponding to the scan parameters from a database based on the scan parameters, and presents the guidance information to medical staff.
In addition to the above-described scan parameters, the guidance information output unit 101 preferably extracts guidance information corresponding to the patient information from a database based on the patient information on the body shape and body position of the patient and presents the guidance information to medical staff.
The database is created by an expert based on past historical data. When the database is manufactured, the expert screens out the scanning parameters which have great influence on the received radiation amount from the plurality of scanning parameters and stores the scanning parameters as labels. In addition, the database stores a correspondence table in which scanning parameters (labels) that have a large influence on the amount of radiation received are associated with guidance information that can reduce or avoid the amount of radiation, and a guidance information label in which the labels and the guidance information are matched and combined one by one.
In addition to the scan parameters, the database may also store the patient information as a label, store the correspondence between the patient information and the guidance information as a label, and create a corresponding guidance information label.
For example, when the scan parameter set by the scan parameter setting unit 201 is input, the guidance information output unit 101 first determines whether or not a label matching the scan parameter is stored in the database, and when a matching label is present, it continues to determine whether or not the value of the input scan parameter is within the value range of the correspondence table, and when the scan parameter and the scan value range are satisfied, presents a guidance information label indicating both the label and the corresponding guidance information to the medical staff. The correspondence table and the guidance information label will be described later. As shown in fig. 1, the guidance information output unit 101 may be performed before or after the radiographic image diagnostic apparatus performs imaging, in other words, the guidance information output unit 101 may cooperate with the display control unit 105 independently of the radiation dose spatial distribution information acquisition unit 102, the position information acquisition unit 103, and the radiation dose information acquisition unit 104, which will be described later, or may cooperate with the display control unit 105 together with the acquisition units.
The display control unit 105 may cause the display unit to display the guidance information obtained by the guidance information output unit 101. The medical staff can see characters or images as specific guide information contents through a liquid crystal display or the like as a display unit. For example, the display control unit 105 may display initial guidance information obtained based on scan parameters, patient information, and the like on the display unit before the start of scanning, that is, before irradiation of radiation, and display subsequent guidance information, which may be the same guidance information as the initial guidance information or guidance information different from the initial guidance information and having a better shielding effect, on the display unit when the radiation amount of radiation exceeds a safe range.
The absorbed radiation amount management apparatus 100 preferably further includes a radiation amount risk determination unit, and the radiation amount risk determination unit is not shown in fig. 1. The radiation risk judgment unit is used for judging whether the radiation quantity received by the specific organ exceeds a threshold value. When the amount of radiation received after the start of imaging exceeds a preset threshold, the display unit may display the result or sound the result to give an alarm, or when the amount of radiation received exceeds a preset threshold, the guidance information output unit may further provide guidance information to the medical staff. The guidance information may be displayed on a display unit or presented by voice.
Next, a management flow of the radiation absorption amount management device according to the present embodiment will be described with reference to fig. 3.
First, in step S101, a user, i.e., a medical staff, selects a desired scan protocol according to an examination item, and specifies scan parameters corresponding to the scan protocol, which may be initial scan parameters defined in advance or adjusted by the user according to actual conditions, for example, the body type of a patient, and the adjusted scan parameters are stored in a storage unit, not shown. The scan parameter mentioned above may include a name of the scan parameter and a numerical size of the scan parameter, and is abbreviated herein as the scan parameter for convenience of description.
Next, in step S102, after the scan parameter specified in step S101 is input to the guidance information output unit 101, whether or not a tag matching the input scan parameter is present is searched for in a database in which the corresponding scan parameter (tag) and guidance information are stored in advance, and after a match is found, it is determined whether or not the input scan parameter matches the determination criterion based on the determination criterion in the correspondence table, and if so, a guidance information tag in which the scan parameter in the correspondence table and the corresponding guidance information are combined is presented to the medical staff. Here, the case where the scan parameters are presented to the medical staff together with the corresponding guidance information is exemplified, but the present invention is not limited to this, and only the guidance information may be provided to the medical staff without presenting the scan parameters that are the basis for making the guidance information. The guidance information label may be displayed on a display or presented by voice or the like.
The scan parameters described in the correspondence table may be scan parameters of a part or all of the scan protocols selected by the user, the scan parameters being scan parameters that are selected by experts based on past historical data and easily affect vital organs of the user (medical staff), and each scan parameter corresponds to at least one guidance information that can avoid or reduce the amount of radiation. In addition, each scan parameter may also correspond to a determination criterion in the correspondence table, and when the scan parameter satisfies the determination criterion, the scan parameter may be presented to the user (medical staff) together with the corresponding guidance information.
TABLE 1
Table 1 lists several parameters that are susceptible to radiation effects on vital organs, including mainly: c-arm angle, special scanning procedures (DSA, etc.), time, patient size, and patient position. When the C-arm is used, because the radiation received by the medical staff is mainly from the scattering of the X-ray of the patient, the information user can be guided to stand on the detector side away from the X-ray generator side and lead protection is used according to the rotation angle of the C-arm, and when DSA (digital subtraction angiography) is included in the operation, because the radiation intensity near the operation table is high, the information user can be guided to move one step away from the operation table, and when the operation time is longer, the information user can be guided to use the lead protection, in addition, the radiation of the medical staff is mainly from the scattering of the X-ray of the patient, if the size of the patient is larger, the radiation received by the medical staff is larger, so the information medical staff can be guided to be away from the operation table or use the lead protection as far as possible according to the size of the patient, and if the operation has special requirements on the body position of the patient, the radiation received by the medical staff is also influenced by the difference of the standing positions of the medical staff, so that the information medical staff can be guided to stand at the position with less radiation as much as possible according to the body position of the patient.
In the above description, only a part of the guidance information is listed, and the actual guidance information is not limited to the above example, and other protection methods such as protective glasses, protective vests, and the like may be adopted as necessary.
Next, the procedure of selecting the guidance information will be described by taking the scanning parameters shown in table 1 as an example.
For example, when a plurality of scanning parameters of the scanning protocol include a scanning parameter related to the rotation angle of the C-arm, a tag meeting the conditions is searched in a database in which a plurality of kinds of guiding information are already stored, and if the tag meeting the conditions is found, the guiding information corresponding to the tag is extracted, and "far away from the x-ray generator side, standing on the detector side and using lead protection" is suggested to medical staff, for example, "XX degrees of the C-arm angle: please leave the x-ray generator side, stand on the detector side and use lead shielding "as a guide information label.
For example, when a special scanning procedure as a scanning parameter is included in a plurality of scanning parameters of the scanning protocol, DSA is included in the plurality of scanning parameters, it is determined whether or not the scanning parameter meets a determination criterion in the correspondence table, and if the determination criterion is met, the "one-step movement in a direction away from the operating table" information is guided to the medical staff, and for example, "the special scanning procedure DSA: please move one step away from the operating table "as a guiding information label.
The guidance information labels are selected in the same manner for other scanning parameters, and a repetitive description thereof is omitted here.
Although the case where step S102 is executed after step S101 has been described above, the operation of step S102 may not be performed and the scanning may be started directly before the radiographic image diagnostic apparatus performs imaging (step S103). Although the guidance information cannot be obtained in advance, medical staff can adopt different corresponding methods according to the degree of radiation of the important organ obtained in real time in the subsequent step, so that the aim of managing the radiation quantity can be fulfilled.
In step S103, after the scanning is started, the process proceeds to step S104.
In step S104, first, the movement of the medical staff in the operating room, for example, the operating room is imaged by a plurality of cameras installed indoors, and a plurality of moving images relating to the movement of the medical staff are stored. Then, the position of the medical staff in the operating room is recognized from the plurality of stored dynamic images by the motion detection means by the motion capture method in the related art, and the position information of the medical staff is obtained.
In step S104, the posture and position of the medical staff may be recognized by the plurality of cameras to determine the number of medical staff and the position of the medical staff relative to the X-ray emitter (for example, the medical staff is facing the X-ray emitter, the medical staff is facing away from the X-ray emitter, or the medical staff is present in the operating room and the relative positions of the plurality of medical staff and the X-ray emitter), and the spatial distribution of the dose, which will be described later, may be corrected based on the recognition result.
Fig. 4 shows a method for capturing posture information of a moving object by loading a model to capture a motion trajectory, for example, loading a human body model, setting constraints on the model and the motion, wherein the constraints can be a plurality of points related to joints of the human body, and tracking the points to capture the overall motion trajectory. However, this method is only an example, and is not limited thereto, and other methods may be used as long as the object of the present invention can be achieved.
In step S105, the radiation dose spatial distribution information acquisition unit 102 calculates the spatial distribution of the radiation dose in real time based on the imaging conditions corresponding to the imaging performed by the radiographic image diagnostic device. The execution order of step S104 and step S105 is not limited, and one may be executed first and then the other, or both may be executed simultaneously.
Next, in step S106, the radiation dose information acquiring unit 104 calculates the radiation dose of the radiation received by the vital organ of the medical staff based on the radiation dose spatial distribution acquired by the radiation dose spatial distribution information acquiring unit 102 and the position information of the vital organ of the medical staff acquired by the position information acquiring unit 103, and causes the display unit to display information relating to the radiation dose through the display control unit 105.
Then, in step S107, the radiation level risk determination unit determines whether or not the radiation level received by the vital organ exceeds a predetermined threshold. If the threshold value is exceeded, the process proceeds to step S108, and after providing the medical staff with the warning or guidance information, the process returns to step S106, and the information on the amount of radiation to which the vital organ is exposed is continuously displayed. If the threshold is not exceeded, the process returns to step S106. The radiation amount risk judging unit is a part of the absorbed radiation amount management apparatus 100, and is not shown in the drawings. The threshold value may be a radiation value that is harmful to an organ of interest, or a radiation value that is insufficient to cause damage to an organ of interest but is desired to be noticed by medical personnel.
By executing the steps S101, S103 to S106 of the present embodiment, it is possible to display the positional information of the vital organs of the medical staff in the spatial distribution of the radiation amount and the information on the radiation amount received by the vital organs in real time, and therefore, the calculation result of the radiation amount is more realistic and accurate than the case of using the radiation amount spatial distribution model, and further, the subject of the present embodiment is the vital organs of the human body, and therefore, it is possible to allow the medical staff to manage the radiation amount received by each part of the medical staff more specifically than the case of managing the radiation amount for the entire human body.
Step S102 is a preferable step in the present embodiment, and guidance information can be provided to medical staff in advance before the start of scanning, thereby reducing the possibility of exposure to radiation.
Steps S107 and S108 are also preferable steps in the present embodiment. By executing steps S107 and S108 of the present embodiment, it is possible to determine whether the radiation level reaches a dangerous level during the scanning process, and if there is a possibility of damage to an important organ, further provide an alarm and/or guidance information to avoid the radiation level exceeding the standard.
In the present embodiment, the medical staff can see the radiation amount of the body organ on the display or the like as the display unit while performing the operation, and can obtain guidance information for reducing the radiation amount on the display before and after the start of the scanning and when the radiation amount exceeds the threshold value, thereby making it possible to manage the absorbed radiation amount favorably.
(embodiment mode 2)
Only the configuration and operation of the correction unit 106 will be described below.
The correction unit 106 is connected to the radiation amount spatial distribution information acquisition unit 102. The radiation dose spatial distribution information acquisition unit 102 generates a real-time radiation dose spatial distribution in the operating room based on the input scan parameters. However, the above-described spatial distribution of the radiation dose may not be reflected in all cases, and information on medical staff and information on a patient may not be sufficiently reflected by the spatial distribution of the radiation dose.
Examples of the information on the medical staff include: the number of medical staff, the relative position between the medical staff and the X-ray generator, and protective equipment worn by the medical staff.
Examples of the information on the patient include: the size of the patient, the position of the patient, etc.
It is known that when medical staff face and face away from an X-ray emitter, the radiation dose to each organ is different, and when there are a plurality of medical staff in an operating room, if the medical staff near the X-ray emitter partially shields the medical staff on the rear side, the radiation dose to the medical staff on the rear side is reduced compared to when the medical staff is not shielded, and if the medical staff uses a shield such as a lead curtain or lead glasses, the radiation dose to the organ to be shielded is reduced.
Furthermore, it is known that a considerable part of the radiation to which medical personnel are exposed, in addition to radiation based on X-ray emitters, comes from scatter based on the patient's body. Thus, the bulkier the patient is, the greater the amount of radiation it receives.
Since factors other than the scanning parameters are not considered in the radiation amount spatial distribution acquired by the radiation amount spatial distribution information acquisition unit 102, the initially generated radiation amount spatial distribution needs to be corrected in order to sufficiently reflect the spatial distribution of the radiation amount in reality. At this time, the patient and the medical staff are tracked by the camera in the operation room, information on the medical staff and information on the patient are captured, and the initially acquired radiation amount spatial distribution is corrected by using the information as a correction factor.
As described above, the information on the medical staff includes: the medical staff position information and the defense use condition are used for indicating the number of the medical staff and the relative position relationship between the medical staff and the X-ray emitter. The use condition of the armour includes whether the armour is used or not, the protection position of the armour and the like.
Here, the case where the position information of the medical staff, the body type of the patient, and the use of the armour are collectively used as the correction factor is exemplified, but only one of them may be used as the correction factor.
In embodiment 1, the guidance information output unit 101 provides guidance information to the medical staff to reduce or avoid the radiation amount, based on the input imaging conditions such as the scan parameters, before the scan. In embodiment 2, in addition to the above-described imaging conditions, the guidance information output unit 101 may further provide guidance information to medical staff based on patient information relating to the body size, body position, and the like of the patient and medical staff information relating to the number, position, protection situation, and the like of the medical staff.
In the present embodiment, the use of the correction unit makes it possible to obtain a spatial distribution of radiation in consideration of environmental factors, and to accurately determine the radiation dose of each organ.
(embodiment mode 3)
Embodiment 3 is a modification of embodiment 1. As shown in fig. 6, the absorbed radiation amount management system 1002 according to embodiment 3 includes the same radiographic imaging device 200 as that of embodiment 1, and the guidance information output unit 101, the radiation amount spatial distribution information acquisition unit 102, the position information acquisition unit 103, the radiation amount information acquisition unit 104, and the display control unit 105 in the absorbed radiation amount management device 100, as compared with the absorbed radiation amount management system 1000 according to embodiment 1. The difference between embodiment 2 and embodiment 1 is that the absorption radiation dose management apparatus 100 according to embodiment 3 further includes a radiation dose simulation unit 107, a storage unit 108, and a video stream generation unit 109. Since the components other than the radiation level simulation unit 107, the storage unit 108, and the video stream generation unit 109 are the same as those in embodiment 1, their description is omitted.
As shown in fig. 6, the radiation level simulation unit 107 is connected to the radiation level spatial distribution information acquisition unit, and generates a three-dimensional simulation diagram of the spatial distribution of the radiation level in the room based on the radiation level spatial distribution acquired by the radiation level spatial distribution information acquisition unit 102.
The storage unit 108 is connected to the position information acquisition unit 103 and the radiation dose information acquisition unit 104. The position information acquisition unit 103 captures an image of the progress of the operation in real time by a camera, not shown, installed indoors, and stores the captured image in the storage unit 108 in real time. The radiation dose information acquiring unit 104 calculates the radiation dose to which the specific organ of the medical staff is subjected, and stores the calculated radiation dose in the storage unit 108.
Accordingly, the storage unit 108 stores moving image data related to the movement of the medical staff and related to the amount of radiation received by the vital organ. The moving image data is image data in which the amount of radiation to which an important organ is exposed is displayed in an image captured by a camera. A schematic diagram of a simulation showing only the amount of radiation to which an important organ is exposed and not showing the spatial distribution of the amount of radiation is illustrated in fig. 7A.
The video stream generating unit 109 combines the moving image data with the three-dimensional simulation map to obtain a video stream in which a simulation field of the amount of radiation passing through the human body and the amount of radiation received by the vital organs of the human body are simultaneously displayed.
The display control unit 105 causes the display unit to display the generated video stream so that the medical staff in the operation selects a safe position. In addition, the video stream can also be used for post-operative radiation dose analysis or training of staff for guiding medical staff to select safe locations.
Fig. 7B shows a schematic diagram of a video stream displayed by the display section. The display unit may be provided as a display screen on a wall directly opposite the operation table for easy observation, or may be provided as a computer display near the operation table.
Fig. 8 shows a schematic diagram of displaying the amount of radiation to which an organ of interest is exposed and a video stream using two display portions. However, a plurality of images may be displayed on the same display unit. For convenience of illustration, medical personnel performing the operation are omitted in fig. 8.
According to the present embodiment, the three-dimensional simulation graph of the radiation amount is displayed in a superimposed manner on the medical staff, so that the intersection relationship between each important organ and the spatial distribution of the radiation amount and the radiation amount received by each important organ can be visually displayed, and the spatial distribution of the radiation amount is visualized, so that the region with weak radiation can be visually distinguished, thereby facilitating the position adjustment of the medical staff.
The present embodiment may be provided with the correction unit of embodiment 2, and when the correction unit is provided, the same function as embodiment 2 can be exhibited.
In the radiation absorption amount management devices according to embodiments 1 to 3 of the present invention, the respective processing functions that can be realized by the guidance information output unit, the radiation amount spatial distribution information acquisition unit, the position information acquisition unit, the radiation amount information acquisition unit, the display control unit, the correction unit, the radiation amount simulation unit, and the video stream generation unit as the constituent elements are stored in the storage circuit in the form of a computer-executable program. The display portion may be implemented by a display, the memory may be implemented by a storage medium, and the video camera may be implemented by a camera. The processing circuit of the processor reads out a computer-executable program from the storage circuit and executes the program, thereby realizing a function corresponding to each program. In other words, the processing circuit in a state in which each program is read has functions of a guidance information output unit, a radiation amount spatial distribution information acquisition unit, a position information acquisition unit, a radiation amount information acquisition unit, a correction unit, a radiation amount simulation unit, and a video stream generation unit. In addition, each unit in the radiation absorption amount management apparatus of the present invention may be realized by a single processor, or a plurality of independent processors may be combined into a processing circuit, and the functions of the units may be realized by executing a program by each processor.
The embodiments of the present invention have been described above, but the embodiments described above are merely examples and are not intended to limit the scope of the present invention. These new embodiments can be implemented by other various means. Various omissions, substitutions, and changes may be made without departing from the spirit of the invention. These embodiments and modifications are included in the scope and gist of the invention, and are included in the invention described in the scope of claims and the scope equivalent thereto.
Claims (18)
1. An absorbed radiation management apparatus comprising:
a radiation amount spatial distribution information acquisition unit that acquires information relating to a radiation amount spatial distribution calculated based on imaging conditions corresponding to imaging performed by the radiographic image diagnostic device;
a position information acquiring unit that acquires position information of a part of a medical staff near the radiographic image diagnostic apparatus in the radiation dose spatial distribution;
a radiation amount information acquiring unit that acquires information relating to an amount of radiation received by the part, based on the positional information; and
and a display control unit that controls the display unit to display information relating to the radiation amount.
2. The radiation-absorbing amount management apparatus according to claim 1,
the position information acquiring unit acquires position information of the part of the medical staff in the radiation dose spatial distribution based on posture information of the medical staff in the radiation dose spatial distribution.
3. The radiation-absorbing amount management apparatus according to claim 2,
the position information acquiring unit acquires posture information of the spatial distribution of the radiation dose of the medical staff by a motion detecting means, and acquires position information of the part of the medical staff in the spatial distribution of the radiation dose based on the posture information.
4. The absorbed radiation amount management apparatus according to claim 3,
the position information acquiring unit further acquires position information of a part of the medical staff in the radiation dose spatial distribution based on anatomical position information corresponding to the medical staff.
5. The radiation-absorbing amount management apparatus according to claim 1,
the position information acquiring unit acquires position information of the medical staff moving during the examination by tracking the medical staff.
6. The radiation-absorbing amount management apparatus according to claim 1,
the medical imaging apparatus further includes a guidance information output unit that provides guidance information to the medical staff based on imaging conditions before imaging is started, thereby reducing or avoiding an amount of absorbed radiation.
7. The radiation-absorbing amount management apparatus according to claim 1,
the imaging conditions include scan parameters and information about the patient.
8. The radiation-absorbing amount management apparatus according to claim 1,
the radiation amount spatial distribution correction device further includes a correction unit that corrects the radiation amount spatial distribution based on a correction factor obtained by the imaging unit, the correction factor including at least one of information relating to a medical staff and information relating to a patient.
9. The radiation-absorbing amount management apparatus according to claim 1,
the imaging device further comprises an alarm unit for generating an alarm by displaying or presenting an alarm by sound on the display unit when the amount of radiation received after the start of imaging exceeds a predetermined threshold.
10. The radiation-absorbing amount management apparatus according to claim 6,
the guidance information output unit outputs guidance information when the amount of radiation received after the start of imaging exceeds a preset threshold.
11. The radiation-absorbing amount management apparatus according to claim 1,
the display unit displays the cumulative radiation dose of a plurality of vital organs in each operation.
12. The radiation-absorbing amount management device according to claim 6 or 10,
the display unit displays the guidance information provided to the medical staff.
13. The radiation-absorbing amount management apparatus according to claim 1,
the medical image processing apparatus further includes a storage unit for storing a plurality of image information related to the movement of the medical staff.
14. The radiation-absorbing amount management apparatus according to claim 11,
the display unit highlights the detected vital organ based on a detection result of the position detection.
15. The radiation-absorbing amount management apparatus according to claim 1,
the display unit displays the real-time spatial distribution of the radiation amount and the position of the medical staff with the vital organs highlighted on the plurality of image data, and guides the medical staff to a safe working position.
16. The radiation-absorbing amount management apparatus according to claim 1,
further provided with:
a radiation amount simulation unit that generates a three-dimensional simulation diagram of spatial distribution of the amount of radiation in the room;
a storage unit that stores moving image data relating to the movement of the medical staff and the amount of radiation received by the part; and
and a video stream generating unit that generates a video stream in which the moving image data and the three-dimensional simulation diagram are combined.
17. The radiation-absorbing amount management apparatus according to claim 16,
the display unit displays the video stream so as to guide medical staff to a safe position.
18. A method for managing an amount of absorbed radiation, wherein,
the method comprises the following steps:
a radiation amount spatial distribution information acquisition step of acquiring information on a radiation amount spatial distribution calculated based on imaging conditions corresponding to imaging performed by the radiographic image diagnostic apparatus;
a position information acquisition step of acquiring position information of a part of a medical staff around the radiographic image diagnostic apparatus in the radiation dose spatial distribution;
a radiation amount information acquisition step of acquiring information relating to the amount of radiation received by the part based on the positional information; and
and a display control step of controlling the display unit to display information relating to the radiation amount.
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| CN201910274940.2A CN111796317A (en) | 2019-04-08 | 2019-04-08 | Radiation absorption amount management device and radiation absorption amount management method |
| JP2019121826A JP7412908B2 (en) | 2019-04-08 | 2019-06-28 | Absorbed dose management device and absorbed dose management method |
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| US6241670B1 (en) * | 1997-07-02 | 2001-06-05 | Kabushiki Kaisha Toshiba | Radiotherapy system |
| JP2005049148A (en) * | 2003-07-31 | 2005-02-24 | Hitachi Ltd | Device for visualizing distribution of radiation dose rate |
| JP2009213709A (en) * | 2008-03-11 | 2009-09-24 | Toshiba Corp | Absorbed dose management apparatus |
| JP2014236798A (en) * | 2013-06-06 | 2014-12-18 | 株式会社東芝 | X-ray diagnostic apparatus, exposure management device, scattered ray dose distribution formation method, and scattered ray dose distribution formation program |
| JP2015213671A (en) * | 2014-05-12 | 2015-12-03 | 株式会社東芝 | X-ray image diagnostic apparatus and exposure management method of medical staff |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP4497962B2 (en) | 2004-03-11 | 2010-07-07 | 株式会社東芝 | Dose monitoring system and monitoring method thereof |
| JP4792076B2 (en) | 2008-11-10 | 2011-10-12 | 東芝医用システムエンジニアリング株式会社 | Radiation dose estimation device |
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- 2019-04-08 CN CN201910274940.2A patent/CN111796317A/en active Pending
- 2019-06-28 JP JP2019121826A patent/JP7412908B2/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6241670B1 (en) * | 1997-07-02 | 2001-06-05 | Kabushiki Kaisha Toshiba | Radiotherapy system |
| JP2005049148A (en) * | 2003-07-31 | 2005-02-24 | Hitachi Ltd | Device for visualizing distribution of radiation dose rate |
| JP2009213709A (en) * | 2008-03-11 | 2009-09-24 | Toshiba Corp | Absorbed dose management apparatus |
| JP2014236798A (en) * | 2013-06-06 | 2014-12-18 | 株式会社東芝 | X-ray diagnostic apparatus, exposure management device, scattered ray dose distribution formation method, and scattered ray dose distribution formation program |
| JP2015213671A (en) * | 2014-05-12 | 2015-12-03 | 株式会社東芝 | X-ray image diagnostic apparatus and exposure management method of medical staff |
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