JP2012066048A - Method and device for displaying stereoscopic image - Google Patents

Abstract

PROBLEM TO BE SOLVED: To display an enlarged stereoscopic image, which facilitates observation of an area of interest, without imposing a burden on an observer, when extracting the predetermined area of interest in two radiological images constituting the stereoscopic image, so as to perform the enlarged display of the extracted area of interest.SOLUTION: In a stereoscopic image display method, the radiological image in each imaging direction detected by a radiological image detector is obtained by applying radiation to a subject from two imaging directions different from each other, and the stereoscopic image is displayed on a display section on the basis of the two obtained radiological images. Information on the areas of interest corresponding to each other in the two radiological images is obtained; image processing including enlargement processing, such that a depth position of the area of interest serves as a display surface of the display section, is applied to the radiological image within a partial range in the radiological image including the obtained area of interest; and the stereoscopic image in the partial range is displayed on the basis of the two image-processed radiological images in the partial range.

Description

  The present invention relates to a stereoscopic image display method for detecting a radiographic image for each imaging direction by irradiating a subject with radiation from two different imaging directions, and displaying a stereoscopic image using the two detected radiographic images. More particularly, the present invention relates to a stereoscopic image display method and apparatus for displaying an enlarged stereoscopic image by enlarging a partial range including a region of interest in a radiographic image.

  Conventionally, it is known that stereoscopic viewing can be performed using parallax by displaying a plurality of images in combination. Such a stereoscopically viewable image (hereinafter referred to as a stereoscopic image or a stereo image) is generated based on a plurality of images having parallax obtained by photographing the same subject from different directions.

  Such generation of stereoscopic images is used not only in the fields of digital cameras and televisions but also in the field of radiographic imaging. That is, the patient is irradiated with radiation from different directions, the radiation transmitted through the subject is detected by a radiation image detector, and a plurality of radiation images having parallax are obtained, and these radiations are acquired. A stereoscopic image is generated based on the image. And by generating a stereoscopic image in this way, a radiographic image with a sense of depth can be observed, and a radiographic image more suitable for diagnosis can be observed.

  Further, in a device that displays a stereoscopic image as described above, similarly to a device that displays a two-dimensional radiation image, lesion detection is performed by CAD (computer aided diagnosis) in order to improve diagnosis accuracy. Has been proposed (see, for example, Patent Document 1).

  Here, in a device that displays a two-dimensional radiographic image using CAD, a part of the vicinity of a lesion detected by CAD is enlarged and displayed, and the stereoscopic image as described above is used. It is desirable that such an enlarged display can also be performed in a device that displays

JP 2004-337200 A JP-A-8-223609 JP 2008-167310 A JP 2006-140822 A

  However, when extracting and enlarging and displaying the vicinity of the lesion in the two radiographic images constituting the stereoscopic image, the parallax amount of the radiographic image near the lesion can be obtained by simply extracting a part of the radiographic image and performing enlargement processing. In some cases, the stereoscopic image near the lesion is enlarged and may appear to be projected very far from the screen, and it may be burdensome for the observer to stereoscopically view the image, or the stereoscopic image may be difficult to observe.

  In Patent Document 2 and Patent Document 3, it is described that the observer's gazing point is adjusted so as to coincide with the display surface. In Patent Document 4, parallax is reduced by shifting two images. Although it is described that adjustment is made, nothing is disclosed about the problem when partially enlarged as described above.

  In view of the above circumstances, the present invention makes it easy to observe a region of interest without burdening an observer when extracting and enlarging a predetermined region of interest from two radiographic images constituting a stereoscopic image. It is an object to provide a stereoscopic image display method and apparatus capable of displaying an enlarged stereoscopic image.

  The stereoscopic image display method of the present invention acquires a radiographic image for each radiographing direction detected by a radiographic image detector by irradiating a subject from two different radiographing directions, and the acquired two radiographic images. In a stereoscopic image display method for displaying a stereoscopic image on a display unit based on the above, information on regions of interest corresponding to each other in two radiographic images is acquired, and a partial range in the radiographic image including the acquired region of interest The radiographic image is subjected to image processing including the enlargement processing so that the depth position of the region of interest becomes the display surface of the display unit, and based on the radiographic images of the two partial ranges subjected to the image processing, A stereoscopic image in the range of the part is displayed.

  The stereoscopic image display apparatus of the present invention irradiates a subject with radiation from two different imaging directions, and acquires a radiation image for each imaging direction detected by the radiation image detector by the irradiation of the radiation. And a display unit that displays a stereoscopic image based on the two radiographic images acquired by the radiological image acquisition unit. An image in which the depth position of the region of interest includes the enlargement process and becomes the display surface of the display unit for the region-of-interest information acquisition unit to be acquired and a partial range of radiographic images in the two radiographic images including the region of interest An image processing unit that performs processing, and the display unit displays a stereoscopic image of a partial range based on the two partial ranges of radiographic images subjected to the image processing. And characterized in that.

  In the stereoscopic image display device of the present invention, the image processing unit identifies a range in which the same range of the subject is projected in two radiographic images as a partial range, and the specified partial range The radiographic image is subjected to enlargement processing, and shift processing is performed on the radiographic image in a part of the enlarged range so that the depth position of the region of interest becomes the display surface of the display unit. .

  In addition, the image processing unit identifies a part of the range so that the regions of interest in the two radiation images are arranged at the same position in the part of the part, and the radiation image of the part of the specified part Can be enlarged.

  Further, the region-of-interest information acquisition unit can automatically detect an abnormal shadow in the two radiation images as a region of interest.

  In addition, a marker image generation unit that generates a marker image that surrounds each region of interest in the two radiographic images may be provided, and the display unit may perform stereoscopic display using the marker image.

  According to the stereoscopic image display method and apparatus of the present invention, information on regions of interest corresponding to each other in two radiographic images is acquired, and a partial range of radiographic images in the radiographic image including the acquired region of interest is obtained. The partial range is based on two partial ranges of radiographic images that have been subjected to image processing such that the depth position of the region of interest including the enlargement process becomes the display surface of the display unit. Since the stereoscopic image is displayed, even when partially enlarged, the region of interest can be displayed at the position on the display surface, and the region of interest can be easily observed without imposing a burden on the observer. A stereoscopic image can be displayed.

1 is a schematic configuration diagram of a breast image photographing display system using an embodiment of a stereoscopic image display device of the present invention. The figure which looked at the arm part of the mammography display system shown in FIG. 1 from the right direction of FIG. 1 is a block diagram showing a schematic configuration inside a computer of the breast image capturing and displaying system shown in FIG. The flowchart for demonstrating the effect | action of the breast image radiographing display system using one Embodiment of the stereoscopic vision image display apparatus of this invention. The figure which showed typically an example of abnormal shadow A1, A2 in the radiographic image for right eyes, and the radiographic image for left eyes, the marker image M1 for right eyes, and the marker image M2 for left eyes The figure which shows typically an example of the stereo image and marker image of a breast including an abnormal shadow The figure which shows typically an example of expansion object range R1 and expansion object range R2 The figure for demonstrating the shift process performed to the enlarged radiation image for right eyes, and the enlarged radiation image for left eyes The figure for demonstrating pop-out amount (DELTA) DF of a stereo image Graph showing an example of the relationship between binocular parallax ΔP and the amount of pop-up ΔDF (A) The figure which shows typically an example of the expansion stereo image displayed on the monitor, (B) The figure which shows typically the figure which looked at the display surface of the monitor from upper direction The figure for demonstrating the identification method of the expansion object range in other embodiment of the stereoscopic vision image display apparatus of this invention.

  Hereinafter, a mammography display system using an embodiment of a stereoscopic image display apparatus of the present invention will be described with reference to the drawings. FIG. 1 is a diagram showing a schematic configuration of the entire breast image photographing display system of the present embodiment.

  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 2 connected to the breast image capturing apparatus 10, a monitor 3 connected to the computer 2, and an input unit. 4 is provided.

  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.

  The arm portion 13 has an alphabet C shape, and a radiation table 16 is attached to one end of the arm portion 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.

  A radiographic image detector 15 such as a flat panel detector and a detector controller 33 that controls reading of a charge signal from the radiographic image detector 15 are provided inside the imaging table 14.

  Further, inside the imaging table 14, a charge amplifier that converts the charge signal read from the radiation image detector 15 into a voltage signal, a correlated double sampling circuit that samples the voltage signal output from the charge amplifier, A circuit board provided with an AD conversion unit for converting a voltage signal into a digital signal is also installed.

  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.

  The radiation image detector 15 can repeatedly perform recording and reading of a radiation image, and may use a so-called direct type radiation image detector that directly receives radiation and generates charges. Alternatively, a so-called indirect radiation image detector that converts radiation once into visible light and converts the visible light into a charge signal may be used. As a radiation image signal reading method, a radiation image signal is read by turning on / off a TFT (thin film transistor) switch, or by irradiating reading light. It is desirable to use a so-called optical readout system from which a radiation image signal is read out, but the present invention is not limited to this, and other systems may be used.

  A radiation source 17 and a radiation source controller 32 are housed 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.

  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.

  The computer 2 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, and the abnormality shown in FIG. A shadow detection unit 8c, a marker image generation unit 8d, an image processing unit 8e, and a display control unit 8f are configured.

  The controller 8a outputs predetermined control signals to the various controllers 31 to 35 to control the entire system. A specific control method will be described in detail later.

  The radiation image storage unit 8b stores in advance two radiation image signals detected by the radiation image detector 15 by photographing from two different photographing directions.

  The abnormal shadow detection unit 8c receives two radiation image signals stored in the radiation image storage unit 8b, and performs an abnormal shadow detection process for detecting an abnormal shadow on the two radiation image signals. It is. In the present embodiment, calcification or a mass is detected as an abnormal shadow. About the detection method of abnormal shadows, detection should be based on the density distribution characteristics and morphological characteristics of the abnormal shadows, specifically, iris filter processing suitable mainly for detecting mass shadows, What is necessary is just to make it detect an abnormal shadow mainly using the morphology filter process etc. which are suitable for detecting a microcalcification shadow. The detection result of the abnormal shadow in the abnormal shadow detection unit 8c is output to the marker image generation unit 8d and the enlargement target range specifying unit 40.

  The marker image generation unit 8d generates a marker image that surrounds the abnormal shadow based on the detection result output from the abnormal shadow detection unit 8c. The marker image for the right eye and the marker image for the left eye having a parallax are generated. Are respectively generated. These marker images are displayed on the monitor 3 to constitute a stereoscopic marker image. Specifically, for example, a right eye marker image and a left eye marker image are generated so that a box-shaped object such as a cube or a rectangular parallelepiped, a wire frame, a balloon, or the like is displayed as a stereoscopic marker image. The right-eye marker image and the left-eye marker image generated by the marker image generation unit 8d are output to the display control unit 8f.

  The image processing unit 8e includes an enlargement target range specifying unit 40, an enlargement processing unit 41, and a shift processing unit 42.

  The enlargement target range specifying unit 40 specifies a partial range in the two radiation images as the enlargement target range. In the present embodiment, the enlargement target range specifying unit 40 is a range including the position of the abnormal shadow based on the position information of the abnormal shadow specified by the observer using the input unit 4 and includes two sheets. A part of the range in which the same range of the subject is projected in the radiographic image is specified as the range to be enlarged. The size of the enlargement target range may be set in advance, or the observer may be able to set an arbitrary size using the input unit 4.

  The enlargement processing unit 41 performs an enlargement process on the radiation image signal in the enlargement target range specified by the enlargement target range specifying unit 40. The enlargement ratio of the enlargement process may be set in advance, or the observer may be able to set an arbitrary enlargement ratio using the input unit 4.

  The shift processing unit 42 performs shift processing for relatively shifting the parallax direction with respect to the radiographic image signal subjected to the enlargement processing in the enlargement processing unit 41. In the present embodiment, specifically, the shift process is performed with a shift amount such that the depth position on the stereo image of the abnormal shadow in the enlargement target region becomes the display surface of the monitor 3.

  The display control unit 8f performs predetermined processing on the two radiographic image signals read from the radiographic image storage unit 8b, and then displays a normal radiographic stereo image of the breast M on the monitor 3. At the same time, when an input of an enlarged display instruction for a predetermined abnormal shadow is received by the observer, the shift processing unit 42 performs a predetermined process on the two radiographic image signals subjected to the shift process. Then, an enlarged stereo image of the enlargement target range including the abnormal shadow is displayed on the monitor 3.

  The input unit 4 is configured by a pointing device such as a keyboard and a mouse, for example, and receives an input of shooting conditions including an enlargement ratio and an input of a shooting start instruction by a photographer. The input unit 4 receives designation of an abnormal shadow to be enlarged as described above, and receives an input of the size of the enlargement target range and the enlargement ratio in the enlargement process.

  The monitor 3 is configured to be able to display a stereo image using two radiation image signals output from the computer 2 at the time of capturing a stereo image. As a configuration for displaying a stereo image, for example, a radiographic image based on two radiographic image signals is displayed using two screens, and one of the radiographic images is observed by using a half mirror or a polarizing glass. It is possible to adopt a configuration in which a stereo image is displayed by being incident on the right eye of the observer and the other radiation image is incident on the left eye of the observer. Or, for example, two radiographic images may be displayed in a superimposed manner while being shifted by a predetermined amount of parallax, and this may be configured to generate a stereo image by observing 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.

  Next, the operation of the mammography / display system of this embodiment will be described with reference to the flowchart shown in FIG.

  First, the patient's breast M is placed on the imaging table 14, and the breast M is compressed with a predetermined pressure by the compression plate 18 (S10).

  Next, in the input unit 4, after various shooting conditions are input by the photographer, an instruction to start shooting is input (S12).

  Then, when there is an instruction to start imaging at the input unit 4, the first radiographic image of the two radiographic images constituting the stereo image of the breast M is captured (S14).

  Specifically, first, the control unit 8 a reads a convergence angle θ for capturing a preset stereo image, and outputs information on the read convergence angle θ to the arm controller 31. In this embodiment, θ = ± 2 ° is stored in advance as information on the convergence angle θ at this time. However, the present invention is not limited to this, and an arbitrary convergence angle is set by the photographer in the input unit 4. It can be set.

  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 ° 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 + 2 ° with respect to a direction perpendicular to the imaging table 14.

  Then, in a state where the arm unit 13 is rotated by + 2 ° in accordance with the control signal output from the arm controller 31, the control unit 8a applies radiation to the radiation source controller 32 and the detector controller 33 and the radiation. A control signal is output so as to read out the 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 + 2 ° direction is detected by the radiation image detector 15, and a radiation image signal is read by the detector controller 33. After predetermined signal processing is performed on the radiographic image signal, the radiographic image signal is stored in the radiographic image storage unit 8 b of the computer 2.

  Next, the second radiographic image of the two radiographic images constituting the stereo image of the breast M is taken (S16).

  Specifically, as shown in FIG. 2, the arm controller 31 outputs a control signal so as to rotate the arm unit 13 by −θ ° with respect to a direction perpendicular to the imaging table 14. That is, in the present embodiment, a control signal is output so that the arm unit 13 is rotated by −2 ° with respect to a direction perpendicular to the imaging table 14.

  Then, in a state where the arm unit 13 is rotated by −2 ° according to the control signal output from the arm controller 31, the control unit 8 a applies radiation to the radiation source controller 32 and the detector controller 33 and performs radiation. A control signal is output so as to read out the image signal. In response to this control signal, radiation is emitted from the radiation source 17, a radiation image obtained by imaging the breast from the −2 ° direction is detected by the radiation image detector 15, and a radiation image signal is read by the detector controller 33, After predetermined signal processing is performed, it is stored in the radiation image storage unit 8b of the computer 2.

  Next, the two radiographic image signals stored in the radiographic image storage unit 8b as described above are input to the abnormal shadow detection unit 8c, and are subjected to an abnormal shadow detection process in the abnormal shadow detection unit 8c to be a radiographic image. An abnormal shadow in the signal is detected (S18), and the position information of the detected abnormal shadow is input to the marker image generation unit 8d.

  Then, the marker image generation unit 8d generates a right eye marker image and a left eye marker image that surround the abnormal shadow, based on the position information of the abnormal shadow output from the abnormal shadow detection unit 8c (S20). . FIG. 5 shows abnormal shadows A1 and A2 detected in the right-eye radiographic image and left-eye radiographic image, respectively, and the right-eye marker image M1 and the left-eye marker generated based on the positional information of the abnormal shadows A1 and A2. An image M2 is schematically shown. Note that the abnormal shadow A1 and the abnormal shadow A2 shown in FIG. 5 represent the same abnormal shadow.

  Then, the two radiation image signals stored in the radiation image storage unit 8b, the right eye marker image signal and the left eye marker image signal generated in the marker image generation unit 8d are input to the display control unit 8f, and these After predetermined processing is performed on the signal, the signal is output to the monitor 3, and a marker image is displayed together with the stereo image of the breast on the monitor 3 (S22). FIG. 6 schematically shows a breast stereo image including the abnormal shadow A3 displayed on the monitor 3 and a three-dimensional marker image M3.

  Next, when the observer wants to enlarge and display the vicinity of the abnormal shadow, the observer specifies the abnormal shadow A3 to be enlarged using the input unit 4 (S24). When designation of the abnormal shadow to be enlarged is accepted, the position information of the designated abnormal shadow is input to the enlargement target range specifying unit 40, and the enlargement target range specifying unit 40 receives the position information of the input abnormal shadow. Based on the above, the enlargement target range including the position of the abnormal shadow is specified (S26). FIG. 7 schematically shows the enlargement target range R1 and the enlargement target range R2 specified by the enlargement target range specifying unit 40.

  Then, information on the enlargement target range specified by the enlargement target range specifying unit 40 is input to the enlargement processing unit 41, and the enlargement processing unit 41 performs an enlargement process on the radiation image signal in the input enlargement target range. (S28).

  Then, the radiographic image signal subjected to the enlargement process in the enlargement processing unit 41 is input to the shift processing unit 42, and the shift processing unit 42 is relative to the input radiographic image signal subjected to the enlargement process in the parallax direction. Shift processing is performed (S30). Specifically, in the present embodiment, as shown in FIG. 8, the amount of parallax between the right-eye enlarged radiographic image and the left-eye enlarged radiographic image becomes small, and the depth position on the stereo image of the abnormal shadows A1 and A2 The shift process is performed with a shift amount such that becomes the display surface of the monitor 3.

  As shown in FIG. 8, it is assumed that the enlargement process and the shift process are also performed on the right eye marker image signal and the left eye marker image signal within the enlargement target range.

  Here, the shift amount in the shift process described above will be discussed below.

First, it is generally known that the projection amount ΔDF of a stereo image is expressed by the following expression (1). As shown in FIG. 9, ΔP is the binocular parallax between the right-eye image I ₂ and the left-eye image I ₁ on the display surface, P is the binocular interval of the observer, and D is the display surface and observation. It is the distance (observation distance) to the person.

ΔDF = ΔP · D / (P + ΔP) (1)
For example, in the above equation (1), if the observer's binocular distance P is 63 mm and the observation distance is 30 cm, the binocular parallax ΔP and the pop-out amount ΔDF have the relationship shown in FIG.

  Here, if the distance between the radiation source 17 and the detection surface of the radiation image detector 15 in this embodiment is 65 cm, for example, the parallel movement distance when photographing from −2 ° and + 2 ° is about 4.5 cm. . Therefore, if displayed at the same magnification as it is, the binocular parallax is 4.5 cm, and when the observation distance is 30 cm, the pop-out amount is about 12 cm from the graph shown in FIG. For example, when the image is enlarged by 2 times or 3 times, the binocular parallax spreads to 9 cm and 13.5 cm, which greatly exceeds the binocular fusion area. Further, since the measurement object has a thickness, the thickness t corresponding to the object is further added to the pop-out amount, so that the fusion is more difficult.

  Therefore, the pop-out amount ΔDF is converted by the above equation (1) from the parallax and magnification of the two radiographic images at the time of imaging, and the sum of the product of the subject thickness t and the magnification (ΔDF + t × magnification) is It is determined whether or not the fusion limit ΔDmax is exceeded, and if it is exceeded, it is desirable to adjust the parallax in a direction lower than ΔDmax. Since the fusion limit ΔDmax differs depending on the individual, it is preferable to display images with different projection amounts in advance and measure the observer's fusion limit ΔDmax.

  Furthermore, the most preferable display condition is that the binocular parallax is always zero regardless of the enlargement ratio as in the present embodiment. By setting the binocular parallax ΔP to zero, the pop-out amount ΔDF becomes zero, and the subject is displayed on the monitor surface, and is displayed on the front of the monitor by the thickness of the subject (t × magnification rate). The Thereby, even an observer with a narrow fusion zone can stereoscopically view the object without any problem.

  Therefore, in this embodiment, the shift process is performed on the two enlarged radiographic image signals with a shift amount such that the binocular parallax ΔP of the abnormal shadows A1 and A2 after enlargement becomes zero.

  Then, the enlarged radiation image signal subjected to the shift processing in the shift processing unit 42 is output to the display control unit 8f, and the display control unit 8f performs a predetermined process on the input enlarged radiation image signal, The image is output to the monitor 3, and an enlarged stereo image including the abnormal shadow A3 and the stereoscopic marker image M3 is displayed on the monitor 3 (S32). FIG. 11A schematically shows an example of an enlarged stereo image displayed on the monitor 3, and FIG. 11B schematically shows a view of the display surface 3a of the monitor 3 as viewed from above. It is shown in.

  According to the embodiment, as shown in FIG. 11B, when the abnormal shadow is enlarged and displayed, the depth position of the abnormal shadow can be set to the display surface 3a of the monitor 3.

  In the above embodiment, the enlargement target range specifying unit 40 is a range including the position of the abnormal shadow specified by the observer, and a part of the same range of the subject projected on the two radiographic images. Although the range is specified as the enlargement target range, the present invention is not limited to this. For example, the enlargement target range specifying unit 40 performs enlargement so that the abnormal shadows in the two radiation images are arranged at the same position in the enlargement target range. The target range may be specified. Specifically, for example, as shown in FIG. 12, the enlargement target range may be specified so that the abnormal shadows in the two radiographic images are arranged at the center position within the enlargement target range. If the enlargement target range is specified in this way, the abnormal shadow is enlarged and displayed as shown in FIG. 11B only by performing the enlargement process without performing the shift process in the above embodiment. At this time, the depth position of the abnormal shadow can be set to the display surface 3 a of the monitor 3.

  In the above embodiment, an embodiment of the stereoscopic image display device of the present invention is applied to a breast image capturing and displaying system. However, the subject of the present invention is not limited to the breast, and for example, the chest and the head. The present invention can also be applied to a radiographic imaging display system that captures images such as.

DESCRIPTION OF SYMBOLS 1 Mammography imaging display system 2 Computer 3 Monitor 3a Display surface 4 Input part 8a Control part 8b Radiation image storage part 8c Abnormal shadow detection part 8d Marker image generation part 8e Image processing part 8f Display control part 10 Mammography apparatus 13 Arm part 14 Imaging table 15 Radiation image detector 16 Radiation irradiation unit 17 Radiation source 18 Pressure plate 40 Expansion target range specifying unit 41 Expansion processing unit 42 Shift processing unit

Claims (6)

A radiographic image for each radiographing direction detected by the radiographic image detector by irradiating the subject with radiation from two different radiographing directions is acquired, and a stereoscopic image is displayed based on the acquired two radiographic images In the stereoscopic image display method displayed on the screen,
Obtaining information on regions of interest corresponding to each other in the two radiographic images;
Applying image processing such that the depth position of the region of interest includes the display surface of the display unit, including enlargement processing, with respect to a partial range of radiation images in the radiological image including the acquired region of interest,
A stereoscopic image display method, comprising: displaying a stereoscopic image of the partial range based on the two partial ranges of radiographic images subjected to the image processing. A radiation image acquisition unit that irradiates a subject with radiation from two different imaging directions and acquires a radiation image for each of the imaging directions detected by the radiation image detector by irradiation of the radiation, and the radiation image acquisition unit In a stereoscopic image display device including a display unit that displays a stereoscopic image based on two acquired radiographic images,
A region-of-interest information acquisition unit that acquires information on regions of interest corresponding to each other in the two radiographic images;
Image processing that includes an enlargement process and performs image processing such that the depth position of the region of interest becomes the display surface of the display unit, with respect to a partial range of radiographic images in the two radiographic images including the region of interest With
The stereoscopic image display, wherein the display unit displays the stereoscopic image of the partial range based on the two partial ranges of radiographic images subjected to the image processing. apparatus. The image processing unit identifies, as the partial range, a range in which the same range of the subject is projected in the two radiographic images, and performs an enlargement process on the radiographic image of the identified partial range With
3. The shift processing is performed on the radiation image of the partial range subjected to the enlargement processing so that the depth position of the region of interest becomes a display surface of the display unit. The stereoscopic image display device described.   The image processing unit identifies the partial range so that the regions of interest in the two radiographic images are arranged at the same position within the partial range, and the radiation of the identified partial range The stereoscopic image display apparatus according to claim 2, wherein an enlargement process is performed on the image.   5. The stereoscopic image display device according to claim 2, wherein the region-of-interest information acquisition unit automatically detects an abnormal shadow in the two radiation images as a region of interest. . A marker image generating unit that generates a marker image surrounding each region of interest in the two radiographic images,
The stereoscopic image display apparatus according to claim 2, wherein the display unit displays a marker that can be stereoscopically viewed using the marker image.