WO2012102184A1 - Radiograph display apparatus and method - Google Patents

Radiograph display apparatus and method Download PDF

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Publication number
WO2012102184A1
WO2012102184A1 PCT/JP2012/051145 JP2012051145W WO2012102184A1 WO 2012102184 A1 WO2012102184 A1 WO 2012102184A1 JP 2012051145 W JP2012051145 W JP 2012051145W WO 2012102184 A1 WO2012102184 A1 WO 2012102184A1
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image
imaging
region
radiation
unit
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PCT/JP2012/051145
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French (fr)
Japanese (ja)
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毅久 荒井
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富士フイルム株式会社
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B6/00—Apparatus for radiation diagnosis, e.g. combined with radiation therapy equipment
    • A61B6/50—Clinical applications
    • A61B6/502—Clinical applications involving diagnosis of breast, i.e. mammography
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B6/00—Apparatus for radiation diagnosis, e.g. combined with radiation therapy equipment
    • A61B6/02—Devices for diagnosis sequentially in different planes; Stereoscopic radiation diagnosis
    • A61B6/022—Stereoscopic imaging

Definitions

  • the present invention relates to a radiation image display apparatus and method for displaying a stereoscopic image of a subject.
  • stereoscopic viewing can be performed using parallax by displaying a combination of a plurality of images.
  • a stereoscopically viewable image hereinafter referred to as a stereoscopic image or a stereo image
  • a stereoscopic image or a stereo image is generated from a plurality of images acquired by photographing the same subject from different directions.
  • stereoscopic images are used not only in the fields of digital cameras and televisions but also in the field of radiographic imaging.
  • a subject is irradiated with radiation from different imaging directions, the radiation transmitted through the subject is detected by a radiation detector to obtain a plurality of radiation images, and a stereoscopic image is obtained using these radiation images. It has been done to display.
  • a stereoscopic image it is possible to observe a radiographic image with a sense of depth, so that diagnosis can be performed more easily.
  • a tissue piece around a lesion may be collected.
  • a hollow tissue collecting needle hereinafter referred to as a living tissue
  • a biopsy that punctures a patient referred to as a meter reading
  • the stereo biopsy apparatus is proposed as an apparatus for performing such a biopsy (refer patent document 2).
  • This stereo biopsy device can specify a three-dimensional position of a lesion while observing a stereoscopic image of a subject, and controls the tip of a biopsy needle to reach the specific position from a desired position. A tissue piece can be collected.
  • the breast when performing a stereo biopsy of the breast, the breast is pressed with a compression plate and photographed, and in the compressed state, a biopsy needle is inserted into the breast to collect a tissue piece. For this reason, the compression plate is provided with an opening necessary to pierce the breast with the biopsy needle.
  • a luminance difference is generated between the region corresponding to the opening in the compression plate and the other portion of the displayed stereoscopic image.
  • the image flickers at the luminance boundary portion when performing stereoscopic viewing, and the eyes of the observer are greatly fatigued. This is a problem that occurs not only in the stereo biopsy of the breast, but also in the case where, for example, when acquiring a stereoscopic image of a finger, there is an imaging aid such as a jig for fixing the finger during imaging.
  • the present invention has been made in view of the above circumstances, and an object thereof is to reduce the fatigue of an observer when displaying a stereoscopic image of a radiographic image.
  • a radiographic image display apparatus includes a display unit that displays a stereoscopic image based on two radiographic images acquired by imaging a subject from two directions, together with an imaging auxiliary tool that transmits radiation, and two In each of the radiographic images, a boundary detection unit that detects a boundary between the first area where the imaging assistance tool does not exist and the second area where the imaging assistance tool exists, and the luminance of the first area and the second area A correction processing unit that applies correction processing to equalize at least one of the two radiation images; And a display control unit that displays a stereoscopic image based on the two radiographic images subjected to the correction process on the display unit.
  • the display control unit may be a part that displays a boundary when displaying a stereoscopic image.
  • the subject may be a breast
  • the imaging aid may be a compression plate having an opening formed at a predetermined position for performing a biopsy that compresses the breast.
  • the stereoscopic image displayed on the display unit may further include a warning unit that issues a warning when a region other than the region corresponding to the opening is designated.
  • the radiographic image display device may further include an image processing unit that performs image processing on the two radiographic images subjected to the correction processing.
  • the correction processing unit may be a portion that performs correction processing based on the statistical values of the first and second regions in the two radiographic images.
  • the radiographic image display method provides radiographic assistance for each of two radiographic images for displaying a stereoscopic image acquired by imaging a subject from two directions together with an imaging auxiliary tool that transmits radiation. Detecting a boundary between the first region where the tool does not exist and the second region where the photographing auxiliary tool exists, A correction process for equalizing the brightness of the first region and the second region is performed on at least one of the two radiation images, A stereoscopic image based on two radiographic images subjected to correction processing is displayed on a display unit.
  • the boundary between the first region where the imaging aid is not present and the second region where the imaging aid is present is detected, and the first region and the second region are detected.
  • Correction processing for equalizing the brightness of the region is performed on at least one of the two radiographic images. For this reason, in the displayed stereoscopic image, the boundary between the first and second regions becomes inconspicuous, and as a result, it becomes difficult to see the flicker caused by the boundary when the observer performs stereoscopic viewing. Therefore, it is possible to reduce fatigue of the eyes of the observer who observes the stereoscopic image.
  • the boundary in the first and second regions that should have been originally visible can be recognized. For this reason, when performing a biopsy especially, it can prevent mistaking the position which stabs a biopsy needle.
  • a warning is given when a region other than the region corresponding to the opening of the compression plate is designated in the stereoscopic image, thereby preventing the biopsy needle from being misplaced. be able to.
  • FIG. 1 Schematic configuration diagram of a stereo breast image radiographing display system using an embodiment of the radiation image display apparatus of the present invention
  • FIG. 1 is a diagram showing a schematic configuration of a mammography display system with a biopsy unit attached.
  • a breast image capturing and displaying system 1 includes a breast image capturing apparatus 10, a computer 8 connected to the breast image capturing apparatus 10, and a monitor (display unit) connected to the computer 8. 9 and an input unit 7.
  • the mammography apparatus 10 includes a base 11, a rotary shaft 12 that can move in the vertical direction (Z direction) with respect to the base 11, and can rotate.
  • the arm part 13 connected with the base 11 is provided.
  • FIG. 2 shows the arm 13 viewed from the right direction in FIG.
  • the arm section 13 has an alphabet C shape, and a radiation table 16 is attached to one end of the arm section 13 so as to face the imaging table 14 at the other end.
  • the rotation and vertical movement of the arm unit 13 are controlled by an arm controller 31 incorporated in the base 11.
  • the imaging table 14 includes a charge amplifier that converts a charge signal read from the radiation detector 15 into a voltage signal, a correlated double sampling circuit that samples a voltage signal output from the charge amplifier, a voltage A circuit board or the like provided with an AD conversion unit or the like for converting a signal into a digital signal is also installed.
  • the photographing table 14 is configured to be rotatable with respect to the arm unit 13, and even when the arm unit 13 rotates with respect to the base 11, the direction of the photographing table 14 is fixed to the base 11. can do.
  • the radiation detector 15 can repeatedly perform recording and reading of a radiation image, and may use a so-called direct type radiation detector that directly receives radiation to generate charges, or radiation. May be used as a so-called indirect radiation detector that converts the light into visible light and converts the visible light into a charge signal.
  • a radiation image signal readout method a radiation image signal is read out by turning on and off a TFT (thin film transistor) switch, or a radiation image signal by irradiating reading light.
  • TFT thin film transistor
  • a radiation source 17 and a radiation source controller 32 are accommodated in the radiation irradiation unit 16.
  • the radiation source controller 32 controls the timing of irradiating radiation from the radiation source 17 and the radiation generation conditions (tube current, time, tube current time product, etc.) in the radiation source 17.
  • FIG. 3 is a view of the compression plate 18 shown in FIG. 1 as viewed from above. As shown in the drawing, the compression plate 18 can perform biopsy while the breast is fixed by the imaging table 14 and the compression plate 18. Thus, the opening 5 having a size of about 10 ⁇ 10 cm square is provided.
  • the biopsis unit 2 is mechanically and electrically connected to the mammography display system 1 by inserting the base portion of the biopsy unit 2 into the opening of the support portion 20 of the compression plate 18 and attaching the lower end of the base portion to the arm portion 13. To be connected.
  • the biopsy unit 2 includes a biopsy needle 21 that is punctured into the breast.
  • the biopsy needle unit 22 is configured to be detachable, a needle support portion 23 that supports the biopsy needle unit 22, and the needle support portion 23 as a rail.
  • a moving mechanism 24 that moves the biopsy needle unit 22 in the X, Y, and Z directions shown in FIGS. 1 to 3 by moving the needle support part 23 in and out.
  • the position of the tip of the biopsy needle 21 of the biopsy needle unit 22 is recognized and controlled as position coordinates (x, y, z) in a three-dimensional space by a needle position controller 35 provided in the moving mechanism 24.
  • 1 is the X direction
  • the paper vertical direction in FIG. 2 is the Y direction
  • the paper vertical direction in FIG. 3 is the Z direction.
  • the computer 8 includes a central processing unit (CPU) and a storage device such as a semiconductor memory, a hard disk, and an SSD, and the control unit 8a, the radiation image storage unit 8b, the boundary as shown in FIG.
  • a detection unit 8c, a correction processing unit 8d, an image processing unit 8e, and a display control unit 8f are configured.
  • the control unit 8a outputs predetermined control signals to the various controllers 31 to 35 to control the entire system. A specific control method will be described later.
  • the radiation image storage unit 8b stores a radiation image signal for each imaging angle acquired by the radiation detector 15.
  • the boundary detection unit 8c includes a first region corresponding to the opening 5 of the compression plate 18 and a second region other than the first region in each of the two radiation images based on the two radiation image signals acquired by imaging. Detect boundaries. Specific boundary detection processing will be described later.
  • the correction processing unit 8d corrects the luminance of at least one of the two radiographic images so that the luminance of the first region and the second region is substantially the same. Specific correction processing will be described later.
  • the image processing unit 8e generates a processed radiographic image by performing processing for improving the image quality such as processing for making the luminance the same, gradation processing, and the like for the two radiographic images whose luminance has been corrected.
  • the display control unit 8f displays a stereo image using two radiographic images subjected to image processing on the monitor 9, or changes the stereoscopic effect of the stereo image.
  • the input unit 7 is configured by a pointing device such as a keyboard and a mouse, for example, and is configured such that the position of an abnormal shadow or the like in the stereo image displayed on the monitor 9 can be specified by a cursor.
  • the input unit 7 receives an input of shooting conditions and an operation instruction by the operator.
  • the monitor 9 displays a stereo image using two radiographic image signals output from the computer 8 in accordance with an instruction from the display control unit 8f.
  • the configuration of the monitor 9 is, for example, two using two screens. Each radiographic image based on one radiographic image signal is displayed, and by using a half mirror or polarizing glass, one radiographic image is incident on the operator's right eye, and the other radiographic image is incident on the operator's left eye. By doing so, it is possible to adopt a configuration for displaying a stereo image.
  • two radiographic images may be shifted and displayed by being shifted by a predetermined shift amount, and a stereo image may be generated by observing this with a polarizing glass, or a parallax barrier method and a lenticular method
  • a stereo image may be generated by displaying two radiation images on a stereoscopically viewable 3D liquid crystal.
  • the breast M is installed on the imaging table 14, and the breast is compressed with a predetermined pressure by the compression plate 18 (step ST1).
  • step ST2 scout imaging is performed prior to imaging of the stereo image of the breast M (step ST2).
  • the control unit 8a outputs a control signal to the radiation source controller 32 and the detector controller 33 so as to perform radiation irradiation and readout of a radiographic image signal in order to perform biopsy scout imaging.
  • the arm unit 13 is in a position where the arm unit 13 is perpendicular to the imaging table 14 in the initial position, radiation is emitted from the radiation source 17 in accordance with this control signal, and the breast is vertically aligned.
  • the scout image GS acquired by scout shooting is displayed on the monitor 9. While observing the scout image, the operator positions the breast M so that the abnormal shadow visually recognized in the scout image is positioned at the position of the opening 5 of the compression plate 18. At this time, anesthesia of the breast M is performed. In addition, after the positioning, when the installation position of the breast M is different from that at the time of the scout photographing, the scout photographing is performed again. On the other hand, after positioning, when the installation position of the breast M becomes substantially the same as that during scout imaging, scout imaging is not performed again in order to reduce the exposure dose to the subject.
  • the control unit 8 a reads a convergence angle ⁇ for photographing a preset stereo image, and outputs information of the read convergence angle ⁇ to the arm controller 31.
  • ⁇ 30 degrees ( ⁇ 15 degrees with respect to the vertical direction) is stored in advance as information on the convergence angle ⁇ at this time.
  • ⁇ An arbitrary angle of 4 degrees or more and 10 degrees or less ( ⁇ 2 degrees or more and ⁇ 5 degrees or less with respect to the vertical direction) may be used.
  • a stereo image of the breast M is photographed (step ST3).
  • the arm controller 31 receives the information on the convergence angle ⁇ output from the control unit 8a.
  • the arm controller 31 captures the image of the arm unit 13 based on the information on the convergence angle ⁇ as shown in FIG.
  • a control signal is output so as to rotate + ⁇ degrees with respect to a direction perpendicular to the table 14. That is, in the present embodiment, a control signal is output so that the arm unit 13 is rotated +15 degrees with respect to a direction perpendicular to the imaging table 14.
  • the control unit 8a outputs a control signal to the radiation source controller 32 and the detector controller 33 so as to perform radiation irradiation and readout of the radiation image signal.
  • the control signal radiation is emitted from the radiation source 17, a radiation image obtained by photographing the breast from the +15 degree direction is detected by the radiation detector 15, and a radiation image signal is read out by the detector controller 33.
  • the image signal is stored in the radiation image storage unit 8 b of the computer 8.
  • the radiographic image signal stored in the radiographic image storage unit 8b by this imaging represents the radiographic image GR for the right eye.
  • the arm controller 31 once returns the arm unit to the initial position, and then outputs a control signal so as to rotate by ⁇ degrees with respect to the direction perpendicular to the imaging table 14. That is, in the present embodiment, the control signal is output so that the arm unit 13 is rotated by ⁇ 15 degrees with respect to the direction perpendicular to the imaging table 14.
  • the arm 13 rotates by -15 degrees in accordance with the control signal output from the arm controller 31.
  • the control unit 8a outputs a control signal to the radiation source controller 32 and the detector controller 33 so as to perform radiation irradiation and radiation image reading.
  • radiation is emitted from the radiation source 17
  • a radiation image obtained by photographing the breast from the ⁇ 15 degree direction is detected by the radiation detector 15, and a radiation image signal is read out by the detector controller 33.
  • the signal processing is performed, it is stored in the radiation image storage unit 8b of the computer 8.
  • the radiographic image signal stored in the radiographic image storage unit 8b by this imaging represents the radiographic image GL for the left eye.
  • FIG. 6 is a diagram for explaining boundary detection. 6 shows only the right-eye radiographic image GR, the left-eye radiographic image GL is also detected in the same manner as the right-eye radiographic image GR. As shown in FIG.
  • the radiographic image GR includes an image of the breast M, but the breast M is compressed by the compression plate 18 at the time of imaging, and further, the compression plate 18 is formed with the opening 5.
  • the brightness is different between the first region A1 corresponding to the opening 5 where the plate 18 does not exist and the second region A2 corresponding to the compression plate 18 other than the opening 5.
  • the boundary detection unit 8c performs a differentiation process on the radiographic image GR using a differential filter or the like, and determines the pixel positions in which the differential value is equal to or greater than a predetermined threshold value and arranged in a straight line as the first and second regions. It is detected as a boundary between A1 and A2. Since the position of the opening 5 in the compression plate 18 is determined in advance, as shown in the hatched portion in FIG. 7, if the differentiation process is performed only in the region corresponding to the boundary in the radiation image GR, the calculation is performed. Time can be shortened.
  • the correction processing unit 8d performs correction processing for making the luminances of the first and second regions A1 and A2 substantially the same for the radiographic images GL and GR (step ST5). Specifically, the correction processing unit 8d first calculates the statistical values T1 and T2 of the pixel values of the first and second regions A1 and A2. Note that an average value, a median value, or the like can be used as the statistical value. Then, the correction processing unit 8d adds and subtracts the offset value to / from at least one pixel value of the first and second regions A1 and A2 so that the statistical values T1 and T2 are equal to each other. The luminances of the areas A1 and A2 are made substantially the same.
  • step ST5 a correction process may be performed on either one of the radiation images GL and GR so that the luminances of the first and second regions A1 and A2 are substantially the same.
  • the image processing unit 8e performs image processing for improving the image quality such as processing for making the luminance the same, gradation processing, and the like on the radiation images GL and GR (step ST6). Thereafter, the radiographic image signals of the two radiographic images GL and GR that have been subjected to image processing are output to the monitor 9 by the display control unit 8f, and a stereo image of the breast is displayed on the monitor 9 (step ST7).
  • FIG. 8 is a diagram schematically showing a stereo image displayed on the monitor 9. As shown in FIG. 8, the stereo image includes an image of the breast M having a depth.
  • the operator After the stereo image of the breast is displayed, the operator discovers abnormal shadows such as calcification and tumor in the breast and subsequently wants to collect those tissues by the biopsy unit 2. On the stereo image displayed on the screen, the operator designates the target of the abnormal shadow (step ST8).
  • the designation of the target may be performed by a pointing device such as a mouse in the input unit 7, for example.
  • a pointing device such as a mouse in the input unit 7, for example.
  • an indicator for a three-dimensional cursor is displayed in each of two radiographic images constituting a stereo image, and a three-dimensional cursor that is a stereoscopic image composed of the two indicators is displayed by the input unit 7.
  • the target may be specified by moving it.
  • the position of the index in each of the radiographic images GL and GR is assumed to have the coordinate position set according to the shooting direction when the stereo image is shot so as to indicate the same position.
  • the position information (x, y, z) of the designated target is acquired by the control unit 8a.
  • the control unit 8a determines whether or not a position based on the designated position information is present at a position corresponding to the opening 5 of the compression plate 18 (is the designated position appropriate: step ST9).
  • the control part 8a displays a warning on the monitor 9 (step ST10), and step ST.
  • the warning display only needs to prompt the operator to correct the target position.
  • the warning may be given by voice instead of the display, or the warning may be given by both voice and display.
  • step ST9 the control unit 8a outputs the position information to the needle position controller 35 of the biopsy unit 2.
  • a control signal for moving the biopsy needle 21 is output from the control unit 8 a to the needle position controller 35.
  • the needle position controller 35 moves the biopsy needle 21 so that the tip of the biopsy needle 21 is positioned above the position indicated by the coordinates based on the position information value input previously.
  • the position of the tip of the biopsy needle 21 indicated by the coordinates is controlled by the control unit 8 a and the needle position controller 35.
  • the biopsy needle 21 is moved so that the biopsy needle 21 is disposed, and the biopsy needle 21 punctures the breast (step ST11).
  • a correction process for equalizing the brightness of the first region A1 and the second region A2 in the two radiation images GL and GR is performed on each of the radiation images GL and GR.
  • the boundary between the first and second regions A1 and A1 becomes inconspicuous, and as a result, the flicker caused by the boundary becomes difficult to see when the observer performs stereoscopic viewing. . Therefore, it is possible to reduce the fatigue of the eyes of the observer who observes the stereo image.
  • a warning is given when an area other than the area corresponding to the opening 5 of the compression plate 18 is designated as the target position, thereby preventing the position where the biopsy needle is perforated from being mistaken. be able to.
  • the boundary between the first and second regions A1 and A2 may be displayed when displaying a stereo image.
  • FIG. 9 is a diagram schematically showing a stereo image displaying the boundary between the first and second regions A1 and A2. As shown in FIG. 9, the boundary between the first and second regions A1, A2 is indicated by a broken line. In this way, when displaying a stereo image, by displaying the boundary between the first and second regions A1 and A2, the boundary in the first and second regions A1 and A2 that should have been originally visible is recognized. can do. For this reason, when performing biopsy especially, it can prevent making the position which pierces a biopsy needle wrong.
  • one embodiment of the radiographic image display apparatus of the present invention is applied to a stereo mammography imaging display system.
  • the subject of the present invention is not limited to the breast, and for example, a finger other than the breast.
  • the present invention can also be applied to a radiographic imaging display system that performs imaging using an imaging aid for the head or the like.

Abstract

The invention allows the reduction of an observer's fatigue when stereoscopic images of radiographs are displayed. The subject is imaged from two different imaging directions using an imaging assistive device such as a compression plate and two radiographs for displaying a stereoscopic image are acquired. A boundary detection unit (8c) detects a boundary between a first region in which the imaging assistive device is absent and a second region in which the imaging assistive device is present in each of the two radiographs. A correction unit (8d) performs a corrective processing that equalizes the brightness of the first region and the second region in the two radiographs. A display control unit (8f) displays the stereoscopic image, based on the two corrected radiographs, on a monitor (display unit) (9).

Description

放射線画像表示装置および方法Radiation image display apparatus and method
　本発明は、被検体の立体視画像を表示する放射線画像表示装置および方法に関するものである。 The present invention relates to a radiation image display apparatus and method for displaying a stereoscopic image of a subject.
　従来、複数の画像を組み合わせて表示することにより、視差を利用して立体視できることが知られている。このような立体視できる画像（以下、立体視画像またはステレオ画像という）は、同一の被写体を異なる方向から撮影して取得された複数の画像から生成される。 Conventionally, it is known that stereoscopic viewing can be performed using parallax by displaying a combination of a plurality of images. Such a stereoscopically viewable image (hereinafter referred to as a stereoscopic image or a stereo image) is generated from a plurality of images acquired by photographing the same subject from different directions.
　一方、このような立体視画像は、デジタルカメラやテレビ等の分野だけでなく、放射線画像撮影の分野においても利用されている。すなわち、被検体に対して異なる撮影方向から放射線を照射し、その被検体を透過した放射線を放射線検出器によりそれぞれ検出して複数の放射線画像を取得し、これらの放射線画像を用いて立体視画像を表示することが行われている。このような立体視画像を用いることにより、奥行き感のある放射線画像を観察することができるため、診断をより行いやすくすることができる。 On the other hand, such stereoscopic images are used not only in the fields of digital cameras and televisions but also in the field of radiographic imaging. In other words, a subject is irradiated with radiation from different imaging directions, the radiation transmitted through the subject is detected by a radiation detector to obtain a plurality of radiation images, and a stereoscopic image is obtained using these radiation images. It has been done to display. By using such a stereoscopic image, it is possible to observe a radiographic image with a sense of depth, so that diagnosis can be performed more easily.
　また、立体視画像の画質を向上させるために、複数の放射線画像において輝度を決定する領域を設定し、その領域に基づいて複数の放射線画像の輝度を一定にする画像処理を行う手法が提案されている（特許文献１参照）。 In addition, in order to improve the image quality of stereoscopic images, a method has been proposed in which an area for determining luminance in a plurality of radiographic images is set, and image processing is performed to make the luminance of the plurality of radiographic images constant based on the area. (See Patent Document 1).
　ところで、病院の検査では病変周辺の組織片を採取することがあるが、近年、患者に大きな負担をかけずに組織片を採取する方法として、中が空洞の組織採取用の針（以下、生検針と称する）を患者に刺し、針の空洞に埋め込まれた組織を採取するバイオプシが注目されている。そして、このようなバイオプシを行うための装置としてステレオバイオプシ装置が提案されている（特許文献２参照）。 By the way, in a hospital examination, a tissue piece around a lesion may be collected. Recently, as a method of collecting a tissue piece without imposing a heavy burden on a patient, a hollow tissue collecting needle (hereinafter referred to as a living tissue) is used. A biopsy that punctures a patient (referred to as a meter reading) and collects tissue embedded in the needle cavity has attracted attention. And the stereo biopsy apparatus is proposed as an apparatus for performing such a biopsy (refer patent document 2).
　このステレオバイオプシ装置は、被検体の立体視画像を観察しながら病変の３次元的な位置を特定することができ、生検針の先端をその特定位置に到達するよう制御することによって所望の位置から組織片を採取することができるものである。 This stereo biopsy device can specify a three-dimensional position of a lesion while observing a stereoscopic image of a subject, and controls the tip of a biopsy needle to reach the specific position from a desired position. A tissue piece can be collected.
特開平９－３１３４７１号公報JP-A-9-31471 特開２０１０－７５３１７号公報JP 2010-75317 A
　ところで、乳房のステレオバイオプシを行う際には、乳房を圧迫板により圧迫して撮影を行い、圧迫した状態で生検針を乳房に刺して組織片を採取するようにしている。このため、圧迫板には生検針を乳房に刺すために必要な開口部が形成されている。しかしながら、圧迫板に開口部が形成されていると、表示される立体視画像には、圧迫板における開口部に対応する領域とそれ以外の部分とにおいて輝度差が生じてしまう。このように立体視画像において輝度差が生じていると、立体視を行う際に輝度の境界部分において画像のちらつきが生じ、観察者の目が大きく疲労することとなる。これは、乳房のステレオバイオプシのみならず、例えば指の立体視画像を取得する際に、撮影時に指を固定する治具等の撮影補助具が存在する場合にも生じる問題である。 By the way, when performing a stereo biopsy of the breast, the breast is pressed with a compression plate and photographed, and in the compressed state, a biopsy needle is inserted into the breast to collect a tissue piece. For this reason, the compression plate is provided with an opening necessary to pierce the breast with the biopsy needle. However, if an opening is formed in the compression plate, a luminance difference is generated between the region corresponding to the opening in the compression plate and the other portion of the displayed stereoscopic image. When a luminance difference is generated in the stereoscopic image in this way, the image flickers at the luminance boundary portion when performing stereoscopic viewing, and the eyes of the observer are greatly fatigued. This is a problem that occurs not only in the stereo biopsy of the breast, but also in the case where, for example, when acquiring a stereoscopic image of a finger, there is an imaging aid such as a jig for fixing the finger during imaging.
　本発明は上記事情に鑑みなされたものであり、放射線画像の立体視画像を表示するに際し、観察者の疲労を軽減できるようにすることを目的とする。 The present invention has been made in view of the above circumstances, and an object thereof is to reduce the fatigue of an observer when displaying a stereoscopic image of a radiographic image.
　本発明による放射線画像表示装置は、放射線を透過する撮影補助具とともに、被検体を２方向から撮影することにより取得された、２つの放射線画像に基づく立体視画像を表示する表示部と、２つの放射線画像のそれぞれにおいて、撮影補助具が存在しない第１の領域と、撮影補助具が存在する第２の領域との境界を検出する境界検出部と、第１の領域および第２の領域の輝度を等しくする補正処理を、２つの放射線画像の少なくとも一方に施す補正処理部と、
　補正処理が施された２つの放射線画像に基づく立体視画像を表示部に表示する表示制御部とを備えたことを特徴とするものである。 A radiographic image display apparatus according to the present invention includes a display unit that displays a stereoscopic image based on two radiographic images acquired by imaging a subject from two directions, together with an imaging auxiliary tool that transmits radiation, and two In each of the radiographic images, a boundary detection unit that detects a boundary between the first area where the imaging assistance tool does not exist and the second area where the imaging assistance tool exists, and the luminance of the first area and the second area A correction processing unit that applies correction processing to equalize at least one of the two radiation images;
And a display control unit that displays a stereoscopic image based on the two radiographic images subjected to the correction process on the display unit.
　なお、本発明による放射線画像表示装置においては、表示制御部を、立体視画像を表示する際に、境界を表示する部分としてもよい。 In the radiographic image display device according to the present invention, the display control unit may be a part that displays a boundary when displaying a stereoscopic image.
　また、本発明による放射線画像表示装置においては、被検体を乳房とし、撮影補助具を、前記乳房を圧迫する、バイオプシを行うために所定位置に開口部が形成された圧迫板としてもよい。 In the radiographic image display device according to the present invention, the subject may be a breast, and the imaging aid may be a compression plate having an opening formed at a predetermined position for performing a biopsy that compresses the breast.
　この場合、表示部に表示された立体視画像において、開口部に対応する領域以外の領域が指定された場合に警告を行う警告部をさらに備えるものとしてもよい。 In this case, the stereoscopic image displayed on the display unit may further include a warning unit that issues a warning when a region other than the region corresponding to the opening is designated.
　また、本発明による放射線画像表示装置においては、補正処理が施された前記２つの放射線画像に対して、画像処理を施す画像処理部をさらに備えるものとしてもよい。 The radiographic image display device according to the present invention may further include an image processing unit that performs image processing on the two radiographic images subjected to the correction processing.
　また、本発明による放射線画像表示装置においては、補正処理部を、２つの放射線画像における第１および第２の領域の統計値に基づいて、補正処理を行う部分としてもよい。 In the radiographic image display device according to the present invention, the correction processing unit may be a portion that performs correction processing based on the statistical values of the first and second regions in the two radiographic images.
　本発明による放射線画像表示方法は、放射線を透過する撮影補助具とともに、被検体を２方向から撮影することにより取得された、立体視画像を表示するための２つの放射線画像のそれぞれにおいて、撮影補助具が存在しない第１の領域と、撮影補助具が存在する第２の領域との境界を検出し、
　第１の領域および第２の領域の輝度を等しくする補正処理を、２つの放射線画像の少なくとも一方に施し、
　補正処理が施された２つの放射線画像に基づく立体視画像を表示部に表示することを特徴とするものである。 The radiographic image display method according to the present invention provides radiographic assistance for each of two radiographic images for displaying a stereoscopic image acquired by imaging a subject from two directions together with an imaging auxiliary tool that transmits radiation. Detecting a boundary between the first region where the tool does not exist and the second region where the photographing auxiliary tool exists,
A correction process for equalizing the brightness of the first region and the second region is performed on at least one of the two radiation images,
A stereoscopic image based on two radiographic images subjected to correction processing is displayed on a display unit.
　本発明によれば、２つの放射線画像のそれぞれにおいて、撮影補助具が存在しない第１の領域と、撮影補助具が存在する第２の領域との境界が検出され、第１の領域および第２の領域の輝度を等しくする補正処理が、２つの放射線画像の少なくとも一方に施される。このため、表示された立体視画像においては、第１および第２の領域の境界が目立たなくなり、その結果、観察者が立体視を行った際に、境界に起因するちらつきが見えにくくなる。したがって、立体視画像を観察する観察者の目の疲労を軽減することができる。 According to the present invention, in each of the two radiographic images, the boundary between the first region where the imaging aid is not present and the second region where the imaging aid is present is detected, and the first region and the second region are detected. Correction processing for equalizing the brightness of the region is performed on at least one of the two radiographic images. For this reason, in the displayed stereoscopic image, the boundary between the first and second regions becomes inconspicuous, and as a result, it becomes difficult to see the flicker caused by the boundary when the observer performs stereoscopic viewing. Therefore, it is possible to reduce fatigue of the eyes of the observer who observes the stereoscopic image.
　また、立体視画像を表示する際に、境界を表示することにより、本来見えるはずであった第１および第２の領域における境界を認識することができる。このため、とくにバイオプシを行う際に、生検針を刺す位置を誤ってしまうことを防止することができる。 Also, when displaying a stereoscopic image, by displaying the boundary, the boundary in the first and second regions that should have been originally visible can be recognized. For this reason, when performing a biopsy especially, it can prevent mistaking the position which stabs a biopsy needle.
　また、乳房のバイオプシを行うに際し、立体視画像において、圧迫板の開口に対応する領域以外の領域が指定された場合に警告を行うことにより、生検針を刺す位置を誤ってしまうことを防止することができる。 In addition, when performing biopsy of the breast, a warning is given when a region other than the region corresponding to the opening of the compression plate is designated in the stereoscopic image, thereby preventing the biopsy needle from being misplaced. be able to.
本発明の放射線画像表示装置の一実施形態を用いたステレオ乳房画像撮影表示システムの概略構成図Schematic configuration diagram of a stereo breast image radiographing display system using an embodiment of the radiation image display apparatus of the present invention 図１に示すステレオ乳房画像撮影表示システムのアーム部を図１の右方向から見た図The figure which looked at the arm part of the stereo breast image radiographing display system shown in FIG. 1 from the right direction of FIG. 図１に示すステレオ乳房画像撮影表示システムの撮影台を上方から見た図The figure which looked at the imaging stand of the stereo breast image radiographing display system shown in Drawing 1 from the upper part 図１に示すステレオ乳房画像撮影表示システムのコンピュータ内部の概略構成を示すブロック図The block diagram which shows schematic structure inside the computer of the stereo breast image radiographing display system shown in FIG. 本実施形態において行われる処理を示すフローチャートA flowchart showing processing performed in the present embodiment 境界の検出を説明するための図（その１）Diagram for explaining boundary detection (part 1) 境界の検出を説明するための図（その２）Diagram for explaining boundary detection (part 2) モニタ（表示部）に表示されたステレオ画像を模式的に示す図The figure which shows typically the stereo image displayed on the monitor (display part) 第１および第２の領域の境界が表示されたステレオ画像を模式的に示す図The figure which shows typically the stereo image in which the boundary of the 1st and 2nd area | region was displayed.
　以下、図面を参照して本発明の放射線画像表示装置の一実施形態を用いたステレオ乳房画像撮影表示システムについて説明する。本発明の実施形態による乳房画像撮影表示システムは、着脱可能なバイオプシユニットを取り付けることにより乳房用のステレオバイオプシ装置としても動作するシステムである。まず、本実施形態の乳房画像撮影表示システム全体の概略構成について説明する。図１は、バイオプシユニットが取り付けられた状態の乳房画像撮影表示システムの概略構成を示す図である。 Hereinafter, a stereo breast image radiographing display system using an embodiment of the radiation image display apparatus of the present invention will be described with reference to the drawings. The mammography display system according to the embodiment of the present invention is a system that also operates as a stereo biopsy device for breasts by attaching a detachable biopsy unit. First, a schematic configuration of the entire breast image capturing and displaying system according to the present embodiment will be described. FIG. 1 is a diagram showing a schematic configuration of a mammography display system with a biopsy unit attached.
　本実施形態の乳房画像撮影表示システム１は、図１に示すように、乳房画像撮影装置１０と、乳房画像撮影装置１０に接続されたコンピュータ８と、コンピュータ８に接続されたモニタ（表示部）９および入力部７とを備えている。 As shown in FIG. 1, a breast image capturing and displaying system 1 according to the present embodiment includes a breast image capturing apparatus 10, a computer 8 connected to the breast image capturing apparatus 10, and a monitor (display unit) connected to the computer 8. 9 and an input unit 7.
　そして、乳房画像撮影装置１０は、図１に示すように、基台１１と、基台１１に対し上下方向（Ｚ方向）に移動可能であり、かつ回転可能な回転軸１２と、回転軸１２により基台１１と連結されたアーム部１３を備えている。なお、図２には、図１の右方向から見たアーム部１３を示している。 As shown in FIG. 1, the mammography apparatus 10 includes a base 11, a rotary shaft 12 that can move in the vertical direction (Z direction) with respect to the base 11, and can rotate. The arm part 13 connected with the base 11 is provided. FIG. 2 shows the arm 13 viewed from the right direction in FIG.
　アーム部１３はアルファベットのＣの形をしており、その一端には撮影台１４が、その他端には撮影台１４と対向するように放射線照射部１６が取り付けられている。アーム部１３の回転および上下方向の移動は、基台１１に組み込まれたアームコントローラ３１により制御される。 The arm section 13 has an alphabet C shape, and a radiation table 16 is attached to one end of the arm section 13 so as to face the imaging table 14 at the other end. The rotation and vertical movement of the arm unit 13 are controlled by an arm controller 31 incorporated in the base 11.
　撮影台１４の内部には、フラットパネルディテクタ等の放射線検出器１５と、放射線検出器１５からの電荷信号の読み出しを制御する検出器コントローラ３３が備えられている。また、撮影台１４の内部には、放射線検出器１５から読み出された電荷信号を電圧信号に変換するチャージアンプや、チャージアンプから出力された電圧信号をサンプリングする相関２重サンプリング回路や、電圧信号をデジタル信号に変換するＡＤ変換部等が設けられた回路基板等も設置されている。 Inside the imaging table 14 are provided a radiation detector 15 such as a flat panel detector and a detector controller 33 that controls reading of a charge signal from the radiation detector 15. The imaging table 14 includes a charge amplifier that converts a charge signal read from the radiation detector 15 into a voltage signal, a correlated double sampling circuit that samples a voltage signal output from the charge amplifier, a voltage A circuit board or the like provided with an AD conversion unit or the like for converting a signal into a digital signal is also installed.
　また、撮影台１４はアーム部１３に対し回転可能に構成されており、基台１１に対してアーム部１３が回転したときでも、撮影台１４の向きは基台１１に対し固定された向きとすることができる。 In addition, the photographing table 14 is configured to be rotatable with respect to the arm unit 13, and even when the arm unit 13 rotates with respect to the base 11, the direction of the photographing table 14 is fixed to the base 11. can do.
　放射線検出器１５は、放射線画像の記録と読み出しを繰り返して行うことができるものであり、放射線の照射を直接受けて電荷を発生する、いわゆる直接型の放射線検出器を用いてもよいし、放射線を一旦可視光に変換し、その可視光を電荷信号に変換する、いわゆる間接型の放射線検出器を用いるようにしてもよい。また、放射線画像信号の読出方式としては、ＴＦＴ（thin film transistor）スイッチをオン・オフさせることによって放射線画像信号が読み出される、いわゆるＴＦＴ読出方式のものや、読取光を照射することによって放射線画像信号が読み出される、いわゆる光読出方式のものを用いることが望ましいが、これに限らずその他のものを用いるようにしてもよい。 The radiation detector 15 can repeatedly perform recording and reading of a radiation image, and may use a so-called direct type radiation detector that directly receives radiation to generate charges, or radiation. May be used as a so-called indirect radiation detector that converts the light into visible light and converts the visible light into a charge signal. As a radiation image signal readout method, a radiation image signal is read out by turning on and off a TFT (thin film transistor) switch, or a radiation image signal by irradiating reading light. Although it is desirable to use a so-called optical readout system in which is read out, the present invention is not limited to this, and other types may be used.
　放射線照射部１６の中には放射線源１７と、放射線源コントローラ３２が収納されている。放射線源コントローラ３２は、放射線源１７から放射線を照射するタイミングと、放射線源１７における放射線発生条件（管電流、時間、管電流時間積等）を制御するものである。 A radiation source 17 and a radiation source controller 32 are accommodated in the radiation irradiation unit 16. The radiation source controller 32 controls the timing of irradiating radiation from the radiation source 17 and the radiation generation conditions (tube current, time, tube current time product, etc.) in the radiation source 17.
　また、アーム部１３の中央部には、撮影台１４の上方に配置されて乳房を押さえつけて圧迫する圧迫板１８と、その圧迫板１８を支持する支持部２０と、支持部２０を上下方向（Ｚ方向）に移動させる移動機構１９が設けられている。圧迫板１８の位置、圧迫圧は、圧迫板コントローラ３４により制御される。図３は、図１に示す圧迫板１８を上方から見た図であるが、同図に示すように、圧迫板１８は、撮影台１４と圧迫板１８により乳房を固定した状態でバイオプシを行えるよう、約１０×１０ｃｍ四方の大きさの開口部５を備えている。 Further, in the central portion of the arm portion 13, a compression plate 18 disposed above the imaging table 14 to press and compress the breast, a support portion 20 that supports the compression plate 18, and a support portion 20 in the vertical direction ( A moving mechanism 19 for moving in the Z direction) is provided. The position of the compression plate 18 and the compression pressure are controlled by the compression plate controller 34. FIG. 3 is a view of the compression plate 18 shown in FIG. 1 as viewed from above. As shown in the drawing, the compression plate 18 can perform biopsy while the breast is fixed by the imaging table 14 and the compression plate 18. Thus, the opening 5 having a size of about 10 × 10 cm square is provided.
　バイオプシユニット２は、その基体部分が圧迫板１８の支持部２０の開口部に差し込まれ、基体部分の下端がアーム部１３に取り付けられることによって、乳房画像撮影表示システム１と機械的、電気的に接続されるものである。 The biopsis unit 2 is mechanically and electrically connected to the mammography display system 1 by inserting the base portion of the biopsy unit 2 into the opening of the support portion 20 of the compression plate 18 and attaching the lower end of the base portion to the arm portion 13. To be connected.
　そして、バイオプシユニット２は、乳房に穿刺される生検針２１を有し、着脱可能に構成された生検針ユニット２２と、生検針ユニット２２を支持する針支持部２３と、針支持部２３をレールに沿って移動させ、あるいは針支持部２３を出し入れさせることにより、生検針ユニット２２を図１から図３に示すＸ、ＹおよびＺ方向に移動させる移動機構２４とを備える。生検針ユニット２２の生検針２１の先端の位置は、移動機構２４が備える針位置コントローラ３５により、３次元空間における位置座標（ｘ，ｙ，ｚ）として認識され、制御される。なお、図１における紙面垂直方向がＸ方向、図２における紙面垂直方向がＹ方向、図３における紙面垂直方向がＺ方向である。 The biopsy unit 2 includes a biopsy needle 21 that is punctured into the breast. The biopsy needle unit 22 is configured to be detachable, a needle support portion 23 that supports the biopsy needle unit 22, and the needle support portion 23 as a rail. And a moving mechanism 24 that moves the biopsy needle unit 22 in the X, Y, and Z directions shown in FIGS. 1 to 3 by moving the needle support part 23 in and out. The position of the tip of the biopsy needle 21 of the biopsy needle unit 22 is recognized and controlled as position coordinates (x, y, z) in a three-dimensional space by a needle position controller 35 provided in the moving mechanism 24. 1 is the X direction, the paper vertical direction in FIG. 2 is the Y direction, and the paper vertical direction in FIG. 3 is the Z direction.
　コンピュータ８は、中央処理装置（ＣＰＵ）および半導体メモリやハードディスクやＳＳＤ等のストレージデバイス等を備えており、これらのハードウェアによって、図４に示すような制御部８ａ、放射線画像記憶部８ｂ、境界検出部８ｃ、補正処理部８ｄ、画像処理部８ｅ、および表示制御部８ｆが構成されている。 The computer 8 includes a central processing unit (CPU) and a storage device such as a semiconductor memory, a hard disk, and an SSD, and the control unit 8a, the radiation image storage unit 8b, the boundary as shown in FIG. A detection unit 8c, a correction processing unit 8d, an image processing unit 8e, and a display control unit 8f are configured.
　制御部８ａは、各種のコントローラ３１～３５に対して所定の制御信号を出力し、システム全体の制御を行うものである。具体的な制御方法については後述する。 The control unit 8a outputs predetermined control signals to the various controllers 31 to 35 to control the entire system. A specific control method will be described later.
　放射線画像記憶部８ｂは、放射線検出器１５によって取得された撮影角度毎の放射線画像信号を記憶するものである。 The radiation image storage unit 8b stores a radiation image signal for each imaging angle acquired by the radiation detector 15.
　境界検出部８ｃは、撮影により取得された２つの放射線画像信号に基づく２つの放射線画像のそれぞれにおいて、圧迫板１８の開口部５に対応する第１の領域とそれ以外の第２の領域との境界を検出する。具体的な境界検出の処理については後述する。 The boundary detection unit 8c includes a first region corresponding to the opening 5 of the compression plate 18 and a second region other than the first region in each of the two radiation images based on the two radiation image signals acquired by imaging. Detect boundaries. Specific boundary detection processing will be described later.
　補正処理部８ｄは、第１の領域と第２の領域との輝度が略同一となるように、２つの放射線画像の少なくとも一方の輝度を補正する。具体的な補正処理については後述する。 The correction processing unit 8d corrects the luminance of at least one of the two radiographic images so that the luminance of the first region and the second region is substantially the same. Specific correction processing will be described later.
　画像処理部８ｅは、輝度が補正された２つの放射線画像に対して、輝度を同一とする処理、階調処理等の画質を向上させる処理を施して処理済みの放射線画像を生成する。 The image processing unit 8e generates a processed radiographic image by performing processing for improving the image quality such as processing for making the luminance the same, gradation processing, and the like for the two radiographic images whose luminance has been corrected.
　表示制御部８ｆは、画像処理済みの２つの放射線画像を用いたステレオ画像をモニタ９に表示したり、ステレオ画像の立体感を変更したりするものである。 The display control unit 8f displays a stereo image using two radiographic images subjected to image processing on the monitor 9, or changes the stereoscopic effect of the stereo image.
　入力部７は、例えば、キーボードやマウス等のポインティングデバイスから構成されるものであり、モニタ９に表示されたステレオ画像内の異常陰影等の位置をカーソルにより指定可能に構成されたものである。また、入力部７は、操作者による撮影条件等の入力や操作指示の入力等を受け付けるものである。 The input unit 7 is configured by a pointing device such as a keyboard and a mouse, for example, and is configured such that the position of an abnormal shadow or the like in the stereo image displayed on the monitor 9 can be specified by a cursor. The input unit 7 receives an input of shooting conditions and an operation instruction by the operator.
　モニタ９は、表示制御部８ｆの指示により、コンピュータ８から出力された２つの放射線画像信号を用いてステレオ画像を表示するものであるが、その構成としては、例えば、２つの画面を用いて２つの放射線画像信号に基づく放射線画像をそれぞれ表示させて、これらをハーフミラーや偏光グラス等を用いることで一方の放射線画像は操作者の右目に入射させ、他方の放射線画像は操作者の左目に入射させることによってステレオ画像を表示する構成を採用することができる。または、例えば、２つの放射線画像を所定のずれ量だけずらして重ね合わせて表示し、これを偏光グラスで観察することでステレオ画像を生成する構成としてもよいし、もしくはパララックスバリア方式およびレンチキュラー方式のように、２つの放射線画像を立体視可能な３Ｄ液晶に表示することによってステレオ画像を生成する構成としてもよい。 The monitor 9 displays a stereo image using two radiographic image signals output from the computer 8 in accordance with an instruction from the display control unit 8f. The configuration of the monitor 9 is, for example, two using two screens. Each radiographic image based on one radiographic image signal is displayed, and by using a half mirror or polarizing glass, one radiographic image is incident on the operator's right eye, and the other radiographic image is incident on the operator's left eye. By doing so, it is possible to adopt a configuration for displaying a stereo image. Or, for example, two radiographic images may be shifted and displayed by being shifted by a predetermined shift amount, and a stereo image may be generated by observing this with a polarizing glass, or a parallax barrier method and a lenticular method As described above, a stereo image may be generated by displaying two radiation images on a stereoscopically viewable 3D liquid crystal.
　次に、本実施形態の乳房画像撮影表示システムの作用について、図５に示すフローチャートを参照しながら説明する。 Next, the operation of the breast image radiographing display system of this embodiment will be described with reference to the flowchart shown in FIG.
　まず、撮影台１４の上に乳房Ｍが設置され、圧迫板１８により乳房が所定の圧力によって圧迫される（ステップＳＴ１）。 First, the breast M is installed on the imaging table 14, and the breast is compressed with a predetermined pressure by the compression plate 18 (step ST1).
　次に、入力部７おいて、操作者によって種々の撮影条件が入力された後、撮影開始の指示が入力される。なお、このとき生検針ユニット２２は上方に待避しており、まだ乳房には穿刺されていないものとする。 Next, in the input unit 7, after various shooting conditions are input by the operator, an instruction to start shooting is input. At this time, it is assumed that the biopsy needle unit 22 is retracted upward and has not yet been punctured into the breast.
　そして、入力部７において撮影開始の指示があると、乳房Ｍのステレオ画像の撮影に先だって、スカウト撮影が行われる（ステップＳＴ２）。具体的には、まず制御部８ａが、バイオプシのスカウト撮影を行うべく、放射線源コントローラ３２および検出器コントローラ３３に対して放射線の照射と放射線画像信号の読み出しを行うよう制御信号を出力する。ここで、アーム部１３は初期位置においては、アーム部１３が撮影台１４に対して垂直となる位置にあることから、この制御信号に応じて、放射線源１７から放射線が射出され、乳房を垂直方向（θ＝０度）方向から撮影した放射線画像が放射線検出器１５によって検出され、検出器コントローラ３３によって放射線画像信号が読み出され、その放射線画像信号に対して所定の信号処理が施された後、コンピュータ８の放射線画像記憶部８ｂに、スカウト画像ＧＳの放射線画像信号として記憶される。 Then, when there is an instruction to start imaging at the input unit 7, scout imaging is performed prior to imaging of the stereo image of the breast M (step ST2). Specifically, first, the control unit 8a outputs a control signal to the radiation source controller 32 and the detector controller 33 so as to perform radiation irradiation and readout of a radiographic image signal in order to perform biopsy scout imaging. Here, since the arm unit 13 is in a position where the arm unit 13 is perpendicular to the imaging table 14 in the initial position, radiation is emitted from the radiation source 17 in accordance with this control signal, and the breast is vertically aligned. A radiation image taken from the direction (θ = 0 degree) is detected by the radiation detector 15, the radiation image signal is read out by the detector controller 33, and predetermined signal processing is performed on the radiation image signal. Then, it is memorize | stored in the radiographic image storage part 8b of the computer 8 as a radiographic image signal of the scout image GS.
　スカウト撮影により取得されたスカウト画像ＧＳはモニタ９に表示される。操作者はスカウト画像を観察しながら、スカウト画像において視認される異常陰影が圧迫板１８の開口部５の位置に位置するように、乳房Ｍの位置決めを行う。また、この際に乳房Ｍへの麻酔が行われる。なお、位置決め後、スカウト撮影時と乳房Ｍの設置位置が異なるものとなった場合には、再度のスカウト撮影を行う。一方、位置決め後、スカウト撮影時と乳房Ｍの設置位置が略同一となった場合には、被検体への被曝量低減のために、再度のスカウト撮影は行わない。 The scout image GS acquired by scout shooting is displayed on the monitor 9. While observing the scout image, the operator positions the breast M so that the abnormal shadow visually recognized in the scout image is positioned at the position of the opening 5 of the compression plate 18. At this time, anesthesia of the breast M is performed. In addition, after the positioning, when the installation position of the breast M is different from that at the time of the scout photographing, the scout photographing is performed again. On the other hand, after positioning, when the installation position of the breast M becomes substantially the same as that during scout imaging, scout imaging is not performed again in order to reduce the exposure dose to the subject.
　次いで制御部８ａは、予め設定されたステレオ画像の撮影のための輻輳角θを読み出し、その読み出した輻輳角θの情報をアームコントローラ３１に出力する。なお、本実施形態においては、バイオプシを行うものであることから、このときの輻輳角θの情報としてθ＝３０度（垂直方向に対して±１５度）が予め記憶されているものとするが、これに限らず、例えば、θ＝２０度（垂直方向に対して±１０度）の角度を用いてもよく、バイオプシを行わない場合には、立体視を良好に行うことが可能なθ＝４度以上１０度以下（垂直方向に対して±２度以上±５度以下）の任意の角度を用いてもよい。 Next, the control unit 8 a reads a convergence angle θ for photographing a preset stereo image, and outputs information of the read convergence angle θ to the arm controller 31. In this embodiment, since biopsy is performed, θ = 30 degrees (± 15 degrees with respect to the vertical direction) is stored in advance as information on the convergence angle θ at this time. For example, an angle of θ = 20 degrees (± 10 degrees with respect to the vertical direction) may be used. If no biopsy is performed, θ = An arbitrary angle of 4 degrees or more and 10 degrees or less (± 2 degrees or more and ± 5 degrees or less with respect to the vertical direction) may be used.
　次に、入力部７において撮影開始の指示があると、乳房Ｍのステレオ画像の撮影が行われる（ステップＳＴ３）。そして、アームコントローラ３１において、制御部８ａから出力された輻輳角θの情報が受け付けられ、アームコントローラ３１は、この輻輳角θの情報に基づいて、図２に示すように、アーム部１３が撮影台１４に垂直な方向に対して＋θ度回転するよう制御信号を出力する。すなわち、本実施形態においては、アーム部１３を撮影台１４に垂直な方向に対して＋１５度回転するよう制御信号を出力する。 Next, when there is an instruction to start photographing at the input unit 7, a stereo image of the breast M is photographed (step ST3). Then, the arm controller 31 receives the information on the convergence angle θ output from the control unit 8a. The arm controller 31 captures the image of the arm unit 13 based on the information on the convergence angle θ as shown in FIG. A control signal is output so as to rotate + θ degrees with respect to a direction perpendicular to the table 14. That is, in the present embodiment, a control signal is output so that the arm unit 13 is rotated +15 degrees with respect to a direction perpendicular to the imaging table 14.
　そして、このアームコントローラ３１から出力された制御信号に応じてアーム部１３が＋１５度回転する。続いて制御部８ａは、放射線源コントローラ３２および検出器コントローラ３３に対して放射線の照射と放射線画像信号の読み出しを行うよう制御信号を出力する。この制御信号に応じて、放射線源１７から放射線が射出され、乳房を＋１５度方向から撮影した放射線画像が放射線検出器１５によって検出され、検出器コントローラ３３によって放射線画像信号が読み出され、その放射線画像信号に対して所定の信号処理が施された後、コンピュータ８の放射線画像記憶部８ｂに記憶される。なお、この撮影により放射線画像記憶部８ｂに記憶される放射線画像信号は、右目用の放射線画像ＧＲを表すものとなる。 Then, according to the control signal output from the arm controller 31, the arm unit 13 rotates by +15 degrees. Subsequently, the control unit 8a outputs a control signal to the radiation source controller 32 and the detector controller 33 so as to perform radiation irradiation and readout of the radiation image signal. In response to this control signal, radiation is emitted from the radiation source 17, a radiation image obtained by photographing the breast from the +15 degree direction is detected by the radiation detector 15, and a radiation image signal is read out by the detector controller 33. After predetermined signal processing is performed on the image signal, the image signal is stored in the radiation image storage unit 8 b of the computer 8. The radiographic image signal stored in the radiographic image storage unit 8b by this imaging represents the radiographic image GR for the right eye.
　次に、アームコントローラ３１は、図２に示すように、アーム部を初期位置に一旦戻した後、撮影台１４に垂直な方向に対して－θ度回転するよう制御信号を出力する。すなわち、本実施形態においては、アーム部１３を撮影台１４に垂直な方向に対して－１５度回転するよう制御信号を出力する。 Next, as shown in FIG. 2, the arm controller 31 once returns the arm unit to the initial position, and then outputs a control signal so as to rotate by −θ degrees with respect to the direction perpendicular to the imaging table 14. That is, in the present embodiment, the control signal is output so that the arm unit 13 is rotated by −15 degrees with respect to the direction perpendicular to the imaging table 14.
　そして、このアームコントローラ３１から出力された制御信号に応じてアーム部１３が－１５度回転する。続いて制御部８ａは、放射線源コントローラ３２および検出器コントローラ３３に対して放射線の照射と放射線画像の読み出しを行うよう制御信号を出力する。この制御信号に応じて、放射線源１７から放射線が射出され、乳房を－１５度方向から撮影した放射線画像が放射線検出器１５によって検出され、検出器コントローラ３３によって放射線画像信号が読み出され、所定の信号処理が施された後、コンピュータ８の放射線画像記憶部８ｂに記憶される。なお、この撮影により放射線画像記憶部８ｂに記憶される放射線画像信号は、左目用の放射線画像ＧＬを表すものとなる。 Then, the arm 13 rotates by -15 degrees in accordance with the control signal output from the arm controller 31. Subsequently, the control unit 8a outputs a control signal to the radiation source controller 32 and the detector controller 33 so as to perform radiation irradiation and radiation image reading. In response to this control signal, radiation is emitted from the radiation source 17, a radiation image obtained by photographing the breast from the −15 degree direction is detected by the radiation detector 15, and a radiation image signal is read out by the detector controller 33. After the signal processing is performed, it is stored in the radiation image storage unit 8b of the computer 8. The radiographic image signal stored in the radiographic image storage unit 8b by this imaging represents the radiographic image GL for the left eye.
　そして、コンピュータ８の放射線画像記憶部８ｂに記憶された２つの放射線画像信号は、放射線画像記憶部８ｂから読み出され、境界検出部８ｃにより、２つの放射線画像信号に基づく放射線画像ＧＬ，ＧＲのそれぞれにおいて、圧迫板１８の開口部５に対応する第１の領域とそれ以外の第２の領域との境界が検出される（ステップＳＴ４）。図６は境界の検出を説明するための図である。なお、図６においては右目用の放射線画像ＧＲのみを示すが、左目用の放射線画像ＧＬについても右目用の放射線画像ＧＲと同様に境界が検出される。図６に示すように、放射線画像ＧＲは乳房Ｍの像を含むが、撮影時に乳房Ｍは圧迫板１８により圧迫されており、さらに圧迫板１８には開口部５が形成されているため、圧迫板１８が存在しない開口部５に対応する第１の領域Ａ１と、開口部５以外の圧迫板１８に対応する第２の領域Ａ２とにおいて、輝度が異なるものとなっている。 Then, the two radiographic image signals stored in the radiographic image storage unit 8b of the computer 8 are read from the radiographic image storage unit 8b, and the boundary detection unit 8c generates radiographic images GL and GR based on the two radiographic image signals. In each case, the boundary between the first region corresponding to the opening 5 of the compression plate 18 and the other second region is detected (step ST4). FIG. 6 is a diagram for explaining boundary detection. 6 shows only the right-eye radiographic image GR, the left-eye radiographic image GL is also detected in the same manner as the right-eye radiographic image GR. As shown in FIG. 6, the radiographic image GR includes an image of the breast M, but the breast M is compressed by the compression plate 18 at the time of imaging, and further, the compression plate 18 is formed with the opening 5. The brightness is different between the first region A1 corresponding to the opening 5 where the plate 18 does not exist and the second region A2 corresponding to the compression plate 18 other than the opening 5.
　境界検出部８ｃは、放射線画像ＧＲに対して微分フィルタ等を用いて微分処理を行い、微分値が所定のしきい値以上となり、かつ直線状に並ぶ画素位置を、第１および第２の領域Ａ１，Ａ２の境界として検出する。なお、圧迫板１８における開口部５の位置は予め定められているため、図７の斜線部分に示すように、放射線画像ＧＲにおける境界に対応する領域のみにおいて微分処理を行うようにすれば、演算時間を短縮することができる。 The boundary detection unit 8c performs a differentiation process on the radiographic image GR using a differential filter or the like, and determines the pixel positions in which the differential value is equal to or greater than a predetermined threshold value and arranged in a straight line as the first and second regions. It is detected as a boundary between A1 and A2. Since the position of the opening 5 in the compression plate 18 is determined in advance, as shown in the hatched portion in FIG. 7, if the differentiation process is performed only in the region corresponding to the boundary in the radiation image GR, the calculation is performed. Time can be shortened.
　次いで、補正処理部８ｄにより、放射線画像ＧＬ，ＧＲのそれぞれに対して、第１および第２の領域Ａ１，Ａ２の輝度を略同一にする補正処理が行われる（ステップＳＴ５）。具体的には、補正処理部８ｄは、まず第１および第２の領域Ａ１，Ａ２の画素値の統計値Ｔ１，Ｔ２を算出する。なお、統計値としては、平均値またはメディアン値等を用いることができる。そして、補正処理部８ｄは、統計値Ｔ１，Ｔ２が等しくなるように、第１および第２の領域Ａ１，Ａ２の少なくとも一方の画素値にオフセット値を加減算することにより、第１および第２の領域Ａ１，Ａ２の輝度を略同一にする。ここで、第２の領域Ａ２は、圧迫板１８が存在するため、第１の領域Ａ１と比較して輝度が高い（濃度が低い）。このため、Ｔ２－Ｔ１をオフセット値として算出し、第１の領域Ａ１の各画素の画素値にオフセット値を加算する、または第２の領域Ａ２の各画素の画素値からオフセット値を減算することにより、第１および第２の領域Ａ１，Ａ２の輝度を略同一にする補正処理を行う。なお、統計値Ｔ１，Ｔ２の平均値を算出し、統計値Ｔ１，Ｔ２と算出した平均値との差をオフセット値として算出し、第１および第２の領域Ａ１，Ａ２の双方の画素値を補正するようにしてもよい。また、ステップＳＴ５において、放射線画像ＧＬ，ＧＲのいずれか一方に対して、第１および第２の領域Ａ１，Ａ２の輝度を略同一にする補正処理を行うようにしてもよい。 Next, the correction processing unit 8d performs correction processing for making the luminances of the first and second regions A1 and A2 substantially the same for the radiographic images GL and GR (step ST5). Specifically, the correction processing unit 8d first calculates the statistical values T1 and T2 of the pixel values of the first and second regions A1 and A2. Note that an average value, a median value, or the like can be used as the statistical value. Then, the correction processing unit 8d adds and subtracts the offset value to / from at least one pixel value of the first and second regions A1 and A2 so that the statistical values T1 and T2 are equal to each other. The luminances of the areas A1 and A2 are made substantially the same. Here, since the compression plate 18 exists in the second area A2, the luminance is higher (density is lower) than that in the first area A1. For this reason, T2-T1 is calculated as an offset value, and the offset value is added to the pixel value of each pixel in the first area A1, or the offset value is subtracted from the pixel value of each pixel in the second area A2. Thus, a correction process is performed to make the luminances of the first and second regions A1, A2 substantially the same. The average value of the statistical values T1 and T2 is calculated, the difference between the statistical values T1 and T2 and the calculated average value is calculated as an offset value, and the pixel values of both the first and second areas A1 and A2 are calculated. You may make it correct | amend. In step ST5, a correction process may be performed on either one of the radiation images GL and GR so that the luminances of the first and second regions A1 and A2 are substantially the same.
　そして、画像処理部８ｅにより、放射線画像ＧＬ，ＧＲに対して、輝度を同一とする処理、階調処理等の画質を向上させる画像処理が施される（ステップＳＴ６）。その後、表示制御部８ｆにより、画像処理済みの２つの放射線画像ＧＬ，ＧＲの放射線画像信号がモニタ９に出力され、モニタ９において乳房のステレオ画像が表示される（ステップＳＴ７）。図８はモニタ９に表示されたステレオ画像を模式的に示す図である。図８に示すように、ステレオ画像には、奥行きを持つ乳房Ｍの像が含まれている。 Then, the image processing unit 8e performs image processing for improving the image quality such as processing for making the luminance the same, gradation processing, and the like on the radiation images GL and GR (step ST6). Thereafter, the radiographic image signals of the two radiographic images GL and GR that have been subjected to image processing are output to the monitor 9 by the display control unit 8f, and a stereo image of the breast is displayed on the monitor 9 (step ST7). FIG. 8 is a diagram schematically showing a stereo image displayed on the monitor 9. As shown in FIG. 8, the stereo image includes an image of the breast M having a depth.
　次に、乳房のステレオ画像が表示された後、操作者によって、乳房における石灰化や腫瘤等の異常陰影が発見され、引き続いてバイオプシユニット２によってそれらの組織を採取したい場合等には、モニタ９に表示されたステレオ画像上において、操作者によって異常陰影のターゲットが指定される（ステップＳＴ８）。 Next, after the stereo image of the breast is displayed, the operator discovers abnormal shadows such as calcification and tumor in the breast and subsequently wants to collect those tissues by the biopsy unit 2. On the stereo image displayed on the screen, the operator designates the target of the abnormal shadow (step ST8).
　ターゲットの指定については、例えば、入力部７におけるマウス等のポインティングデバイスによって行うようにすればよい。具体的には、例えば、ステレオ画像を構成する２つの放射線画像内にそれぞれ３次元カーソル用の指標を表示させ、この２つの指標から構成される立体視画像である３次元カーソルを入力部７によって動かすことによってターゲットを指定するようにすればよい。なお、各放射線画像ＧＬ，ＧＲ内における指標の位置は、それぞれ同じ位置を示すように、ステレオ画像を撮影した際の撮影方向に応じてその座標位置が設定されているものとする。 The designation of the target may be performed by a pointing device such as a mouse in the input unit 7, for example. Specifically, for example, an indicator for a three-dimensional cursor is displayed in each of two radiographic images constituting a stereo image, and a three-dimensional cursor that is a stereoscopic image composed of the two indicators is displayed by the input unit 7. The target may be specified by moving it. In addition, the position of the index in each of the radiographic images GL and GR is assumed to have the coordinate position set according to the shooting direction when the stereo image is shot so as to indicate the same position.
　このように、バイオプシのターゲットとする異常陰影が指定されると、指定されたターゲットの位置情報（ｘ，ｙ，ｚ）が制御部８ａによって取得される。制御部８ａは、指定された位置情報に基づく位置が、圧迫板１８の開口部５に対応する位置に存在するか否かを判定する（指定された位置が適切か：ステップＳＴ９）。ここで、指定された位置が開口部５に位置しないと、生検針２１を乳房に穿孔することができない。このため、ステップＳＴ９が否定されると、制御部８ａはモニタ９に警告表示を行い（ステップＳＴ１０）、ステップＳＴ。警告表示としては、操作者にターゲットの位置の修正を促す内容であればよい。なお、表示に代えて音声により警告を行ってもよく、音声と表示との双方により警告を行ってもよい。 As described above, when an abnormal shadow as a biopsy target is designated, the position information (x, y, z) of the designated target is acquired by the control unit 8a. The control unit 8a determines whether or not a position based on the designated position information is present at a position corresponding to the opening 5 of the compression plate 18 (is the designated position appropriate: step ST9). Here, if the designated position is not located in the opening 5, the biopsy needle 21 cannot be perforated in the breast. For this reason, when step ST9 is denied, the control part 8a displays a warning on the monitor 9 (step ST10), and step ST. The warning display only needs to prompt the operator to correct the target position. The warning may be given by voice instead of the display, or the warning may be given by both voice and display.
　ステップＳＴ９が肯定されると、制御部８ａはその位置情報をバイオプシユニット２の針位置コントローラ３５に出力する。この状態で、入力部７において所定の操作ボタンが押されると、制御部８ａから針位置コントローラ３５に対し、生検針２１を移動させる制御信号が出力される。針位置コントローラ３５は、先に入力された位置情報の値に基づき、生検針２１の先端が、その座標が示す位置の上方に配置されるように、生検針２１を移動する。 When step ST9 is affirmed, the control unit 8a outputs the position information to the needle position controller 35 of the biopsy unit 2. In this state, when a predetermined operation button is pressed in the input unit 7, a control signal for moving the biopsy needle 21 is output from the control unit 8 a to the needle position controller 35. The needle position controller 35 moves the biopsy needle 21 so that the tip of the biopsy needle 21 is positioned above the position indicated by the coordinates based on the position information value input previously.
　その後、操作者により、生検針２１の穿刺を指示する所定の操作が入力部７において行われると、制御部８ａと針位置コントローラ３５の制御の下で、生検針２１の先端が座標の示す位置に配置されるように生検針２１が移動させられて、生検針２１による乳房の穿刺が行われる（ステップＳＴ１１）。 Thereafter, when a predetermined operation for instructing the puncture of the biopsy needle 21 is performed by the operator in the input unit 7, the position of the tip of the biopsy needle 21 indicated by the coordinates is controlled by the control unit 8 a and the needle position controller 35. The biopsy needle 21 is moved so that the biopsy needle 21 is disposed, and the biopsy needle 21 punctures the breast (step ST11).
　このように、本実施形態によれば、２つの放射線画像における圧迫板１８の開口部５に対応する第１の領域Ａ１と、開口部５以外の領域に対応する第２の領域Ａ２との境界を検出し、２つの放射線画像ＧＬ，ＧＲにおける第１の領域Ａ１および第２の領域Ａ２の輝度を等しくする補正処理を放射線画像ＧＬ，ＧＲのそれぞれに施すようにしたものである。このため、表示されたステレオ画像においては、第１および第２の領域Ａ１，Ａ１の境界が目立たなくなり、その結果、観察者が立体視を行った際に、境界に起因するちらつきが見えにくくなる。したがって、ステレオ画像を観察する観察者の目の疲労を軽減することができる。 Thus, according to the present embodiment, the boundary between the first region A1 corresponding to the opening 5 of the compression plate 18 and the second region A2 corresponding to the region other than the opening 5 in the two radiographic images. , And a correction process for equalizing the brightness of the first region A1 and the second region A2 in the two radiation images GL and GR is performed on each of the radiation images GL and GR. For this reason, in the displayed stereo image, the boundary between the first and second regions A1 and A1 becomes inconspicuous, and as a result, the flicker caused by the boundary becomes difficult to see when the observer performs stereoscopic viewing. . Therefore, it is possible to reduce the fatigue of the eyes of the observer who observes the stereo image.
　また、ステレオ画像において、圧迫板１８の開口部５に対応する領域以外の領域がターゲットの位置と指定された場合に警告を行うことにより、生検針を穿孔する位置を誤ってしまうことを防止することができる。 Further, in a stereo image, a warning is given when an area other than the area corresponding to the opening 5 of the compression plate 18 is designated as the target position, thereby preventing the position where the biopsy needle is perforated from being mistaken. be able to.
　なお、上記実施形態においては、ステレオ画像を表示する際に、第１および第２の領域Ａ１，Ａ２の境界を表示してもよい。図９は第１および第２の領域Ａ１，Ａ２の境界を表示したステレオ画像を模式的に示す図である。図９に示すように、第１および第２の領域Ａ１，Ａ２の境界が破線により示されている。このように、ステレオ画像を表示する際に、第１および第２の領域Ａ１，Ａ２の境界を表示することにより、本来見えるはずであった第１および第２の領域Ａ１，Ａ２における境界を認識することができる。このため、とくにバイオプシを行う際に、生検針を穿孔する位置を誤ってしまうことを防止することができる。 In the above embodiment, the boundary between the first and second regions A1 and A2 may be displayed when displaying a stereo image. FIG. 9 is a diagram schematically showing a stereo image displaying the boundary between the first and second regions A1 and A2. As shown in FIG. 9, the boundary between the first and second regions A1, A2 is indicated by a broken line. In this way, when displaying a stereo image, by displaying the boundary between the first and second regions A1 and A2, the boundary in the first and second regions A1 and A2 that should have been originally visible is recognized. can do. For this reason, when performing biopsy especially, it can prevent making the position which pierces a biopsy needle wrong.
　また、上記実施形態は、本発明の放射線画像表示装置の一実施形態をステレオ乳房画像撮影表示システムに適用したものであるが、本発明の被写体としては乳房に限らず、例えば、乳房以外の指、頭部等を対象として、撮影補助具を使用して撮影を行う放射線画像撮影表示システムにも本発明を適用することができる。 In the above embodiment, one embodiment of the radiographic image display apparatus of the present invention is applied to a stereo mammography imaging display system. However, the subject of the present invention is not limited to the breast, and for example, a finger other than the breast. The present invention can also be applied to a radiographic imaging display system that performs imaging using an imaging aid for the head or the like.
　　　１　　乳房画像撮影表示システム
　　　２　　バイオプシユニット
　　　７　　入力部
　　　８　　コンピュータ
　　　８ａ　　制御部
　　　８ｂ　　放射線画像記憶部
　　　８ｃ　　境界検出部
　　　８ｄ　　補正処理部
　　　８ｅ　　画像処理部
　　　８ｆ　　表示制御部
　　　９　　モニタ（表示部）
　　　１０　　乳房画像撮影装置
　　　１３　　アーム部
　　　１４　　撮影台
　　　１５　　放射線検出器
　　　１７　　放射線源
　　　１８　　圧迫板
　　　２１　　生検針
　　　２２　　生検針ユニット
　　　３１　　アームコントローラ
　　　３２　　放射線源コントローラ
　　　３３　　検出器コントローラ
　　　３４　　圧迫板コントローラ
　　　３５　　針位置コントローラ DESCRIPTION OF SYMBOLS 1 Breast imaging photographing display system 2 Biooptic unit 7 Input part 8 Computer 8a Control part 8b Radiation image storage part 8c Boundary detection part 8d Correction processing part 8e Image processing part 8f Display control part 9 Monitor (display part)
DESCRIPTION OF SYMBOLS 10 Mammography apparatus 13 Arm part 14 Imaging stand 15 Radiation detector 17 Radiation source 18 Compression plate 21 Biopsy needle 22 Biopsy needle unit 31 Arm controller 32 Radiation source controller 33 Detector controller 34 Compression plate controller 35 Needle position controller

Claims (7)

  1. 　放射線を透過する撮影補助具とともに、被検体を２方向から撮影することにより取得された２つの放射線画像に基づく立体視画像を表示する表示部と、
    　前記２つの放射線画像のそれぞれにおいて、前記撮影補助具が存在しない第１の領域と、前記撮影補助具が存在する第２の領域との境界を検出する境界検出部と、
    　前記第１の領域および前記第２の領域の輝度を等しくする補正処理を、前記２つの放射線画像の少なくとも一方に施す補正処理部と、
    　前記補正処理が施された前記２つの放射線画像に基づく前記立体視画像を前記表示部に表示する表示制御部とを備えたことを特徴とする放射線画像表示装置。     A display unit that displays a stereoscopic image based on two radiographic images acquired by imaging the subject from two directions, together with an imaging aid that transmits radiation,
    In each of the two radiographic images, a boundary detection unit that detects a boundary between a first region where the imaging assistance tool does not exist and a second region where the imaging assistance tool exists;
    A correction processing unit that applies correction processing to equalize the luminance of the first region and the second region to at least one of the two radiation images;
    A radiographic image display apparatus comprising: a display control unit configured to display the stereoscopic image based on the two radiographic images subjected to the correction process on the display unit.
  2. 　前記表示制御部は、前記立体視画像を表示する際に、前記境界を表示する部分であることを特徴とする請求項１記載の放射線画像表示装置。 The radiographic image display device according to claim 1, wherein the display control unit is a part that displays the boundary when the stereoscopic image is displayed.
  3. 　前記被検体が乳房であり、前記撮影補助具が、前記乳房を圧迫する、バイオプシを行うために所定位置に開口部が形成された圧迫板であることを特徴とする請求項１または２記載の放射線画像表示装置。 3. The object according to claim 1, wherein the subject is a breast, and the imaging assisting tool is a compression plate having an opening formed at a predetermined position for performing a biopsy to compress the breast. Radiation image display device.
  4. 　前記表示部に表示された前記立体視画像において、前記開口部に対応する領域以外の領域が指定された場合に警告を行う警告部をさらに備えたことを特徴とする請求項３記載の放射線画像表示装置。 The radiographic image according to claim 3, further comprising a warning unit that issues a warning when a region other than the region corresponding to the opening is specified in the stereoscopic image displayed on the display unit. Display device.
  5. 　前記補正処理が施された前記２つの放射線画像に対して、画像処理を施す画像処理部をさらに備えたことを特徴とする請求項１から４のいずれか１項記載の放射線画像表示装置。 5. The radiographic image display device according to claim 1, further comprising an image processing unit that performs image processing on the two radiographic images subjected to the correction processing.
  6. 　前記補正処理部は、前記２つの放射線画像における前記第１および前記第２の領域の統計値に基づいて、前記補正処理を行う部分であることを特徴とする請求項１から５のいずれか１項記載の放射線画像表示装置。 The correction processing unit is a portion that performs the correction processing based on statistical values of the first and second regions in the two radiographic images. The radiation image display device according to item.
  7. 　放射線を透過する撮影補助具とともに、被検体を２方向から撮影することにより取得された、立体視画像を表示するための２つの放射線画像のそれぞれにおいて、前記撮影補助具が存在しない第１の領域と、前記撮影補助具が存在する第２の領域との境界を検出し、
    　前記第１の領域および前記第２の領域の輝度を等しくする補正処理を、前記２つの放射線画像の少なくとも一方に施し、
    　前記補正処理が施された前記２つの放射線画像に基づく前記立体視画像を表示部に表示することを特徴とする放射線画像表示方法。     In each of two radiographic images for displaying a stereoscopic image acquired by imaging the subject from two directions together with an imaging auxiliary tool that transmits radiation, the first area in which the imaging auxiliary tool does not exist And a boundary with the second region where the photographing auxiliary tool exists,
    A correction process for equalizing the brightness of the first region and the second region is performed on at least one of the two radiation images,
    A radiographic image display method, wherein the stereoscopic image based on the two radiographic images subjected to the correction process is displayed on a display unit.
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JP2010075317A (en) * 2008-09-25 2010-04-08 Fujifilm Corp Stereo biopsy apparatus, method for controlling the same and phantom

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Publication number Priority date Publication date Assignee Title
JPH09313471A (en) * 1996-05-31 1997-12-09 Toshiba Corp X-ray fluoroscopic diagnosing device
JPH1094539A (en) * 1996-09-24 1998-04-14 Takashi Oe Stereo perspective corresponding x-ray imaging apparatus
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