WO2008054279A1 - Dispositif d'imagerie et système pour l'imagerie - Google Patents

Dispositif d'imagerie et système pour l'imagerie Download PDF

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Publication number
WO2008054279A1
WO2008054279A1 PCT/SE2007/000912 SE2007000912W WO2008054279A1 WO 2008054279 A1 WO2008054279 A1 WO 2008054279A1 SE 2007000912 W SE2007000912 W SE 2007000912W WO 2008054279 A1 WO2008054279 A1 WO 2008054279A1
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WO
WIPO (PCT)
Prior art keywords
imaging
ray
imaging arrangement
support device
detector
Prior art date
Application number
PCT/SE2007/000912
Other languages
English (en)
Inventor
Christer Ullberg
Tom Francke
Original Assignee
Xcounter Ab
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
Priority claimed from SE0602292A external-priority patent/SE530549C2/sv
Application filed by Xcounter Ab filed Critical Xcounter Ab
Publication of WO2008054279A1 publication Critical patent/WO2008054279A1/fr

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B8/00—Diagnosis using ultrasonic, sonic or infrasonic waves
    • A61B8/40—Positioning of patients, e.g. means for holding or immobilising parts of the patient's body
    • A61B8/406—Positioning of patients, e.g. means for holding or immobilising parts of the patient's body using means for diagnosing suspended breasts
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
    • A61B6/02—Arrangements for diagnosis sequentially in different planes; Stereoscopic radiation diagnosis
    • A61B6/03—Computed tomography [CT]
    • A61B6/032—Transmission computed tomography [CT]
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
    • A61B6/04—Positioning of patients; Tiltable beds or the like
    • A61B6/0407—Supports, e.g. tables or beds, for the body or parts of the body
    • A61B6/0435—Supports, e.g. tables or beds, for the body or parts of the body with means for imaging suspended breasts
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
    • A61B6/40—Arrangements for generating radiation specially adapted for radiation diagnosis
    • A61B6/4007—Arrangements for generating radiation specially adapted for radiation diagnosis characterised by using a plurality of source units
    • A61B6/4014—Arrangements for generating radiation specially adapted for radiation diagnosis characterised by using a plurality of source units arranged in multiple source-detector units
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
    • A61B6/44—Constructional features of apparatus for radiation diagnosis
    • A61B6/4417—Constructional features of apparatus for radiation diagnosis related to combined acquisition of different diagnostic modalities
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
    • A61B6/48—Diagnostic techniques
    • A61B6/482—Diagnostic techniques involving multiple energy imaging
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
    • A61B6/50—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment specially adapted for specific body parts; specially adapted for specific clinical applications
    • A61B6/502—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment specially adapted for specific body parts; specially adapted for specific clinical applications for diagnosis of breast, i.e. mammography
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B8/00—Diagnosis using ultrasonic, sonic or infrasonic waves
    • A61B8/08—Detecting organic movements or changes, e.g. tumours, cysts, swellings
    • A61B8/0825—Detecting organic movements or changes, e.g. tumours, cysts, swellings for diagnosis of the breast, e.g. mammography
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
    • A61B6/40—Arrangements for generating radiation specially adapted for radiation diagnosis
    • A61B6/4035—Arrangements for generating radiation specially adapted for radiation diagnosis the source being combined with a filter or grating
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
    • A61B6/52—Devices using data or image processing specially adapted for radiation diagnosis
    • A61B6/5211—Devices using data or image processing specially adapted for radiation diagnosis involving processing of medical diagnostic data
    • A61B6/5229—Devices using data or image processing specially adapted for radiation diagnosis involving processing of medical diagnostic data combining image data of a patient, e.g. combining a functional image with an anatomical image
    • A61B6/5247—Devices using data or image processing specially adapted for radiation diagnosis involving processing of medical diagnostic data combining image data of a patient, e.g. combining a functional image with an anatomical image combining images from an ionising-radiation diagnostic technique and a non-ionising radiation diagnostic technique, e.g. X-ray and ultrasound

Definitions

  • the present invention relates to the field of cone beam computed tomography scanning, and in particular to an imaging arrangement and a system for imaging by means of such cone beam computed tomography.
  • Computed Tomography Scanning also denoted computerized tomography or computed axial tomography (CAT) is a medical imaging method employing imaging by sectioning or 3D reconstruction.
  • CT scanning also denoted computerized tomography or computed axial tomography (CAT)
  • CAT computed axial tomography
  • an X-ray source and an X-ray detector are arranged opposite one another on an arrangement that rotates around a patient.
  • the X-ray source transmits radiation through the patient and the X-ray detector measures the attenuated radiation.
  • the radiation is converted to an electrical signal, a computer processes these signals and the desired images can be provided.
  • the X-ray arrangement is rotated one revolution, then moved a small step and rotated again.
  • the X-ray arrangement moves in a helical movement with a small pitch for each revolution.
  • the speed of rotation is normally a few revolutions per second.
  • CT systems of today use rather narrow detectors with a small field of view in the translation direction.
  • the detector is typically only 0.5 — 30 mm wide.
  • the existing CT detectors use light sensitive CMOS detectors with scintillators emitting light when struck by X-rays .
  • This detector technology cannot be used for implementing wide detectors due to the high costs and problems to read out the signals from a wider detector.
  • An alternative being investigated is the use of area detectors, so called cone beam CT.
  • These area detectors are made of for example thin film transistor (TFT) panels. Such TFT-panels are currently used for 2D X-ray imaging.
  • TFT thin film transistor
  • the TFT-panels have a number of limitations when it comes to cone beam CT imaging. Firstly, they are slow to read out and can at most be read out 60 times per second, but then with rather large pixel size. Small pixel sizes can typically only be read out 5-10 times per second. This is far too slow for CT applications when one wishes to read out the detector one thousand times per revolution or more.
  • the TFT-panels have too high electronic noise, which adds up when thousands of images are combined to form the CT slice images or 3D volumes.
  • area detectors are sensitive to X-rays that scatter in the patient and hit the detector in an arbitrary position, causing a foggy appearance in the X-ray images. These scattered X-rays are normally suppressed by arranging a grid between the patient and the detector. The grid is moved much faster than the detector readout frequency in order to prevent a shadow image to be formed from the grid.
  • the TFT detectors have residual ghost images present that add noise to the succeeding images . They also often saturate for high X-ray fluxes causing the signal to bloom out over several pixels.
  • cone beam CT-scanning in which a larger number of images could be taken without degrading the image quality, more specifically somewhere between 100 and 5000 images in each rotation of the X-ray arrangement, when rotating 0.5-5 revolutions per second.
  • This would set high demands on the detector, for example in terms of readout speed.
  • the detector would have to be able to rapidly detect radiation transmitted from the X-ray source and to quickly transfer the data from the detector to a buffer memory or to a computer from each readout.
  • the size of the pixels have to be small, preferably within the range of 0,05 — 0,1 mm.
  • the detectors used in cone beam CT-scanning today cannot meet these demands; they are simply not fast enough to take such high-resolution images at the required speed.
  • the detector used in a cone beam CT-scanning has to be able to shield radiation scattered from the object being imaged.
  • scattered radiation appears as noise and is added in the reconstructed image. It is difficult to prevent this kind of noise; it is for example difficult to efficiently shield the detector by means of a grid or the like .
  • the X-ray imaging system can be manufactured at a reasonable cost.
  • an object of the invention to provide an imaging arrangement and system for imaging an object that overcomes or at least alleviates the shortcomings of the prior art.
  • an object is to provide a system for imaging an object wherein an increased quality of images taken can be provided, while still enabling the imaging procedure to be performed quickly.
  • Still another object of the invention is to lessen the discomfort of the patient undergoing an examination in the form of imaging a body part, such as a breast.
  • an imaging arrangement for imaging an object comprises: an X-ray source; an X-ray detector arranged to receive X-rays transmitted through the object from the X-ray source, wherein the X-ray detector comprises a gaseous-based edge-on direction sensitive line detector provided with an electron avalanche amplifier, and wherein the line detector is adapted to record a line image of radiation as transmitted through the object; and a support device to which the X-ray source and the X-ray detector are attached so as to be arranged on opposite sides of the object, and wherein the support device is arranged to rotate around the object.
  • the support device is also arranged to be linearly movable in relation to the object.
  • the support device is movable vertically or horizontally with respect to the object.
  • the object is translated in a vertical or horizontal direction while the support device is rotated around the object.
  • a computerized tomography image can be provided.
  • the imaging arrangement in accordance with the present invention can be read out up to 25 000 times per second or even faster.
  • the resolution is high and the pixel size is small, down to 0.05 mm.
  • the photon counting and gaseous avalanche amplification ensures that there is no noise contributing to the image, besides the statistical fluctuation of the X-ray photon flux.
  • the detector has no lag, ghosting or blooming effects.
  • the performance of the imaging arrangement is not degraded by scattered radiation.
  • the gaseous-based line detector discriminates more than 99% of the scattered photons.
  • the imaging arrangement can be made very cost-efficient and the X-ray detector of the imaging arrangement provides an excellent X-ray detector for cone beam CT scanning.
  • the present invention provides an imaging system with a detector that is intrinsically blind to scattered X-rays without the need of a grid.
  • a directional sensitive detector the scattering problems in prior art are eliminated.
  • Figure 1 is a top view of a patient positioning table.
  • Figure 2 is a side view of the patient positioning table of figure 1 , showing an imaging arrangement used in accordance with the invention.
  • Figure 3 illustrates X-ray source and X-ray detector of the imaging arrangement used in the present invention.
  • Figure 4 illustrates a line detector of the X-ray detector shown in figure 3.
  • Figure 5 is another illustration of the X-ray detector utilized in the present invention.
  • Figure 6 illustrates another embodiment of the invention.
  • Mammography is an example of an important application of medical imaging.
  • the breast of the patient is compressed between two compression plates and the X-ray source is activated and the X-ray detector captures a 2D image of the breast.
  • the compression of the breast is most uncomfortable to the patient.
  • it is important that the image quality is high, since breast cancer can, for example, be missed by being obscured by radiographically dense, fibrograndular breast tissue.
  • FIG. 1 illustrates schematically the present invention in a mammography application.
  • a system 1 for medical imaging comprises a patient positioning table 2 on which the patient 3 rests face down. The patient thereby rests comfortably on a horizontal examination table during the whole examination.
  • the patient positioning table 2 comprises a suitably located opening 4 in which the patient places her breasts .
  • Figure 2 illustrates the system 1 of figure 1 in a cross- sectional view.
  • An imaging arrangement is provided underneath the patient positioning table 2.
  • the imaging arrangement comprises an X-ray source 5, a collimator 7 and an X-ray detector 6 attached to a support device 8, for example a common E-arm.
  • the support device 8 is illustrated very schematically in the figure and it is realized that any suitable support structure may be utilized.
  • the X-ray source 5 and the X-ray detector 6 are arranged on the support device 8 on opposite sides of the object to be imaged, the object being, in the illustrated example, the breast of a patient.
  • the X-ray detector 6 is thereby able to measure the radiation transmitted from the X-ray source 5 and through the breast of the patient 3.
  • the imaging arrangement that is, the support device 8 comprising the X-ray source 5, the collimator 7 and the X- ray detector 6 rotate around the object to be imaged.
  • the object i.e. the breast, hangs down in a vertical direction while being imaged. There is no need to compress the breast but the breast should be held still during the procedure.
  • the rotation axis of the imaging arrangement is vertically through the breast, the axis of rotation being indicated at 12.
  • the imaging arrangement 5, 6, 7, 8 While rotating the imaging arrangement 5, 6, 7, 8 it is simultaneously moved in the vertical direction.
  • the vertical movement can be made in a helical movement, i.e. a vertical movement simultaneously with the rotation.
  • the imaging arrangement may be held still while rotating one revolution, then the imaging arrangement is moved a suitable distance in the vertical direction, for example 0.1 — 1 mm and the imaging arrangement is again rotated one revolution and so on.
  • the object is translated parallel to the rotation axis, i.e. moved up or down, while the support device 8 is only rotated around the object.
  • the imaging arrangement 5, 6, 7, 8 comprises a microprocessor or computer (not shown) provided with suitable software for controlling the arrangement and readout and post-processing of the data recorded by the X- ray detector 6.
  • the computer comprises computing means for generating a three-dimensional image of the internals of the object from a large series of two- dimensional X-ray images taken around a single axis of rotation.
  • means are provided for creating three- dimensional computerized tomography images.
  • a power supply (not shown) is included for supplying the X-ray detector 6 and the microprocessor or computer with power.
  • the X-ray source 5, the collimator 7 and the X-ray detector 6 are next described more in detail with reference to figure 3.
  • the X-ray source 5 preferably comprises one or more X-ray tubes having a cathode, which emits electrons, and an anode, which emits X-rays in response to being struck by the electrons.
  • the collimator 7 may be a thin foil of e.g. tungsten.
  • the collimator 7 prevents radiation, which is not directed directly towards the X-ray detector 6, from impinging on the object, thereby reducing the radiation dose to the object. This is advantageous in particular in all applications where the object is a human or an animal, or parts thereof.
  • the line detector comprises a chamber 14, preferably a gas or liquid tight chamber, filled with an ionizable substance, which is also suitable for electron avalanche amplification.
  • the substance is preferably a gas such as a noble gas, carbondioxide, ethane, methane, iso-butane or a combination thereof. It can also be a noble gas in -liquid or solid form.
  • the gas may be under pressure, preferably in a range 1-20 atm.
  • the electrodes 16 and 17 are held at electric potentials such that a strong amplification field is created between cathode 16 and anode 17 for gaseous avalanche amplification of the electrons released as a result of ionization of the substance in the chamber 14.
  • Multiple avalanche electrons thus reach one of the electrodes 17, which also may constitute a read-out arrangement of the detector 6 for detection of pulses induced by the electron avalanches.
  • the read-out arrangement is connected to the microprocessor, mentioned earlier, for further processing of the detected pulses .
  • the X-ray detector 6 comprises a plurality of direction sensitive line detectors arranged in an array, each extending in a horizontal direction in order to record one-dimensional images in the horizontal direction.
  • Each of the line detectors is preferably a gaseous-based ionization detector, as described above, wherein electrons freed as a result of ionization by ionizing radiation entered into the line detector are accelerated, and optionally avalanche amplified, in a direction essentially perpendicular to the direction of the entered ionizing radiation.
  • Such line detector is referred to as a gaseous-based edge-on detector.
  • the X-ray detector 6 comprises a stack of line detectors 6a, 6b,..., 6n is described somewhat more in detail in the following, with reference to figure 5.
  • Each line detector 6a, 6b,..., 6n is directed towards the divergent X-ray source 5 to allow a respective ray bundle b lf ..., b n , ..., b N of the radiation 9 that propagates in a respective one of a plurality of different angles a ir ..., a n , ..., a N with respect to the front surface of the X-ray detector 6 to enter the respective line detector.
  • the collimator 7 may have narrow radiation transparent slits etched away, wherein the number of the slits corresponds to the number of line detectors 6a, 6b,..., 6n of the X-ray detector 6.
  • the slits are aligned with the line detectors
  • the X-ray detector 6 registers the radiation passed through the object.
  • a two- dimensional image per line detector 6a, 6b,..., 6n of the internals of the object is provided based on these registrations. That is, during one revolution a corresponding internal layer of the object is imaged by each line detector 6a, 6b,..., 6n.
  • the X-ray source 5 and the X-ray detector 6 are moved relative the object in a linear manner, while each of the line detectors 6a, 6b,..., 6n records a plurality of line images of radiation as transmitted through the object in a respective one of the different angles a lf ..., a n , ..., a N . That is, a number of imaged layers of the internals of the object can now be computed and a computerized tomography image is provided.
  • the scanning of the object is performed a length, which is sufficiently large so that each one of the line detectors can be scanned at least across the distance between two adjacent line detectors, typically about 1 — 10 mm.
  • the X-ray detector 6 By using the X-ray detector 6 described above, all of the problems described in the introductory part are eliminated or at least greatly alleviated. More specifically, the X-ray detector 6 enables at least 25 000 read outs per second to be made. The resolution is high, and the pixel size is " preferably within the range of 0,05-0,1 mm. The photon counting and gaseous avalanche amplification ensures that no noise will occur. Further, the performance of the X-ray detector 6 is not degraded by scattered radiation. Further yet, the imaging arrangement can be made very cost-efficient and provides an excellent X-ray detector 6 for cone beam CT scanning. The above-described gaseous-based line detector discriminates more than 99% of the scattered photons.
  • the system 1 comprises two imaging arrangements, that is, two X-ray sources 5, 5', two X-ray detectors 6, 6' and two collimators 7 , 7 ' .
  • Each imaging arrangement comprises one X-ray source, one X-ray detector and one collimator as above.
  • the two imaging arrangements are suitably arranged, for example forming an angle of 90° between the respective parts of the imaging arrangements, as illustrated in the figure .
  • Yet additional imaging arrangements could be arranged around the object 40 to be imaged, in dependence on the size of the imaging arrangements .
  • Images can be taken faster owing to the increased amount of X-ray flux.
  • the support device 8 holding the imaging arrangements can be moved half the distance between the two X-ray detectors 6, 6' in the vertical direction.
  • the X-ray sources 5, 5' may have different energies, so as to provide dual energy imaging. This is particularly advantageous if a contrast agent such as iodide is used.
  • Such dual energy imaging can also be accomplished by using a single imaging arrangement.
  • a filter device in front of the collimator 7 can be used for providing such dual-energy imaging.
  • a filter device capable of operating in two or more operation modes having different filter characteristics is disclosed in EP1613216, assigned to the same applicant as the present application.
  • a control device may be arranged to alter the operation mode of the filter device.
  • the imaging arrangement further comprises an ultrasonography device 10.
  • Medical ultrasonography or simply sonography, is an ultrasound-based diagnostic imaging technique and is used for imaging internal organs of a patient. Ultrasonography is prevailingly utilized for scanning organs and provides a reliable method for diagnosing purposes.
  • the object to be imaged i.e. in the illustrated example the breast, is placed in a suitably sized and shaped container 11 comprising a liquid.
  • the liquid may for example be water, oil or spirits.
  • the container 11 is arranged in the opening 4 of the patient positioning table 2.
  • the ultrasonography device 10 thus comprises means for performing these calculations, such as signal processing electronics, which can be of a conventional type. Since the ultrasonography device 10 rotates along with the X-ray source 5 and the X- ray detector 6, three dimensional ultrasonography images are provided.
  • the ultrasonography device 10 is arranged at a suitable angle from the X-ray detector 6, for example 90°, and transmits and receives a sound wave, as described above.
  • the ultrasonography device 10 is arranged to be moved along the wall of the container as the imaging arrangement rotates around the breast.
  • the X-ray images and ultrasonography images are taken simultaneously or consecutively when the breast is in the same position in both types of images.
  • the X-ray images and ultrasonography images each provide a 3D image of the breast. Since the images are taken when the breast is at the same position they may be superimposed or compared to each other easily in any suitable way.
  • the system 1 in accordance with the invention provides means by which a very reliable diagnosis can be made.
  • the preferred rotation axis is illustrated at 12, but another rotation axis may be used.
  • the line detectors 6a, 6b,..., 6n of the detector 6 are preferably- arranged in a plane orthogonal to the axis of rotation 12 of the support device 8.
  • the object i.e. the breast, is indicated.
  • the line detectors 6a, 6b,..., 6n may alternatively be arranged in parallel with the axis of rotation. That is, the line detectors 6a, 6b,..., 6n and the collimator 7 may be turned 90° so that the planar X-ray beam 9 and the electrodes 16 and 17 are vertical instead of horizontal.
  • the object When the X-ray beams are horizontal, then the object is moved in a vertical direction in relation to the imaging arrangement. Conversely, when the X-ray beams are vertical, then the object is moved in a horizontal direction in relation to the imaging arrangement. In either case, the electrodes 16 and 17 of the line detectors 6a, 6b,..., 6n are parallel with the incoming X-rays.
  • the support device 8 can be moved in a horizontal or vertical direction in relation to the object (for example a patient), while being rotated.
  • the support device 8 is only arranged to rotate, while the object is moved in a vertical or horizontal direction in relation to the support device 8.
  • the present invention has been described in connection with a certain medical application, namely mammography, other medical applications are conceivable, for example for scanning the whole body of a patient. It is realized that the invention is valuable and appropriate in other applications as well, besides medical applications.
  • the present invention may be utilized in industrial applications, for example in order to ensure that products manufactured fulfill different quality requirements.
  • Another example of a technical field which may benefit from the present invention is security applications, such as scanning luggage at airports or the like.
  • the invention When utilized in a medical application, the invention provides lessened discomfort for a patient, since a body part of the patient, for example a breast, can be imaged without requiring compression of the body part. Further, if the two different kinds of examinations are performed, the examinations can be performed almost simultaneously, without he patient having to be moved. This has also the advantage that the images can easily be compared to one another, or even superimposed on top of one another where each examination provides different information to be compared to one another .
  • cone beam computed tomography is utilised in a mammography application.
  • the present invention thus provides improvements of the examining of objects by means of cone beam computed tomography, wherein the time required for an examination is minimized. Further, the reliability of the results of an examination method is increased, while still minimizing the duration of the examination. In medical applications, the discomfort for a patient undergoing the examination is minimized, for example in that no compression of the breasts of a patient is needed.

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Abstract

L'invention concerne un dispositif d'imagerie pour l'imagerie d'un objet. Le dispositif d'imagerie comprend : une source de rayons X (5) ; un détecteur de rayons X (6) disposé pour recevoir les rayons X transmis à travers l'objet et provenant de la source de rayons X (5), le détecteur de rayons X (6) comprenant un détecteur linéaire sensible à la direction de bord à base gazeuse pourvu d'un amplificateur par avalanche électronique et le détecteur linéaire étant conçu pour enregistrer une image linéaire du rayonnement tel que transmis à travers l'objet ; et un dispositif support (8) auquel la source de rayons X (5) et le détecteur de rayons X (6) sont attachés de façon à être disposés sur des côtés opposés de l'objet, le dispositif support (8) étant disposé pour tourner autour de l'objet et étant également disposé pour être déplaçable par rapport à l'objet. L'invention concerne également un système comprenant un tel dispositif d'imagerie.
PCT/SE2007/000912 2006-10-31 2007-10-17 Dispositif d'imagerie et système pour l'imagerie WO2008054279A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
SE0602292A SE530549C2 (sv) 2006-10-31 2006-10-31 System för avbildning av ett bröst genom datortomografi
SE0602292-5 2006-10-31
US11/657,014 2007-01-24
US11/657,014 US7561661B2 (en) 2006-10-31 2007-01-24 Imaging arrangement and system for imaging

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2168484A1 (fr) * 2008-09-29 2010-03-31 MIR Medical Imaging Research Holding GmbH Dispositiv d'onde X pour examination des seins avec portique intégrée dans une table pour un patient
JP2015097691A (ja) * 2013-11-20 2015-05-28 キヤノン株式会社 マンモ断層撮影装置
WO2015075898A1 (fr) * 2013-11-20 2015-05-28 Canon Kabushiki Kaisha Appareil de mammographie par tomodensitométrie
WO2015075897A1 (fr) * 2013-11-20 2015-05-28 Canon Kabushiki Kaisha Appareil de mammographie par tomographie par ordinateur

Citations (9)

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Publication number Priority date Publication date Assignee Title
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US4349740A (en) * 1976-12-23 1982-09-14 Siemens Aktiengesellschaft Apparatus for displaying fluoroscopic tomographic images of the body
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JP2015097691A (ja) * 2013-11-20 2015-05-28 キヤノン株式会社 マンモ断層撮影装置
WO2015075898A1 (fr) * 2013-11-20 2015-05-28 Canon Kabushiki Kaisha Appareil de mammographie par tomodensitométrie
WO2015075897A1 (fr) * 2013-11-20 2015-05-28 Canon Kabushiki Kaisha Appareil de mammographie par tomographie par ordinateur
JP2015097693A (ja) * 2013-11-20 2015-05-28 キヤノン株式会社 マンモ断層撮影装置
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US10064592B2 (en) 2013-11-20 2018-09-04 Canon Kabushiki Kaisha Computed tomographic mammography apparatus

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