JP2012050605A - X-ray image photographing apparatus, the x-ray image photographing method, and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an X-ray image photographing apparatus capable of obtaining 3D images of X-ray tomographic images.SOLUTION: The X-ray image photographing apparatus reconstructing the X-ray tomographic images has an area setting unit for setting areas of interest, a photographing controller of obtaining the projecting data of a plurality of X-ray images according to each of photographing positions of an X-ray source, the first image reconstructor reconstructing the X-ray tomographic image for an left eye of the thickness including the area of interest from the projecting data of a plurality of X-ray images in the photographing position of the X-ray source corresponding to the visual field of the left eye of the projecting data of the plurality of X-ray images, the second image reconstructor reconstructing the X-ray tomographic image for a right eye of the thickness including the area of interest from the projecting data of the plurality of the X-ray images in the photographing position of the X-ray source corresponding to the visual field of a right eye of the projecting data of the plurality of X-ray images, a 3-D image generator generating 3-D images from the X-ray tomographic image for the left eye and the X-ray tomographic image for the right eye, and the display displaying the 3-D images so as to be able to view stereoscopically.

Description

  The present invention relates to an X-ray imaging apparatus for reconstructing an X-ray tomographic image at a cross section of an arbitrary height of a subject by using projection data of a plurality of X-ray images acquired by tomosynthesis imaging, and displaying it three-dimensionally, The present invention relates to an X-ray image capturing method and program.

  In an X-ray imaging apparatus that performs tomosynthesis imaging, a subject is irradiated with X-rays at different angles while moving an X-ray source in one direction, and the X-rays irradiated to the subject are detected by a flat panel X-ray detector (FPD). ), The projection data of a plurality of X-ray images with different imaging angles of the subject are acquired by one imaging operation. Then, image processing is performed using the acquired projection data of a plurality of X-ray images, and an X-ray tomographic image is reconstructed at a cross section of the subject at an arbitrary height.

  Hereinafter, reconstruction of an X-ray tomographic image will be described.

  As shown in FIG. 4A, at the time of tomosynthesis imaging, the X-ray source is moved in one direction, and the subject 30 is irradiated with X-rays from the positions S1, S2, and S3. Projection data) P1, P2, and P3 are obtained.

  Here, as shown in FIG. 4A, let us consider a case where the shooting objects A and B exist at two positions where the height of the subject 30 is different. At each imaging position S1, S2, S3, the X-rays emitted from the X-ray source pass through the subject 30 and enter the FPD. As a result, in the X-ray images P1, P2, and P3 corresponding to the imaging positions S1, S2, and S3, the two imaging objects A and B are projected at different positions.

  For example, in the case of the X-ray image P1, since the position S1 of the X-ray source is located on the left side of the imaging objects A and B with respect to the moving direction of the X-ray source, the imaging objects A and B are respectively , And projected onto the positions of P1A and P1B which are shifted to the right side of the photographing objects A and B. Similarly, in the case of the X-ray image P2, the projection is performed at the positions of P2A and P2B almost immediately below, and in the case of the X-ray image P3, the projection is performed at the positions of P3A and P3B shifted to the left side.

  When reconstructing an X-ray tomographic image in a cross section at a height where the imaging target A exists, for example, as shown in FIG. Then, the X-ray image P1 is shifted to the left and the X-ray image P3 is shifted to the right (the shift addition method). As a result, an X-ray tomographic image in which a cross section at a height where the imaging object A exists is emphasized is reconstructed. Further, an X-ray tomographic image in a cross section having an arbitrary height including a cross section having a height where the imaging object B exists can be similarly reconstructed.

  By the way, in tomosynthesis imaging, a plurality of X-ray images are acquired by one imaging operation, so that two X-ray tomographic images having different lines of sight can be reconstructed. It has been proposed to use stereo to view in stereo.

  For example, Patent Document 1 reproduces two different data sets Tr ′ and Tr ″ (tomosynthesis images), both reconstructed from some or all of the original projections Tp (captured images), Tr ′ and Tr "" Is, for example, an image that differs only by a few degrees, and it is disclosed to use this Tr 'and Tr "for stereo viewing.

JP 2007-130487 A

  However, the method described in Patent Document 1 is a three-dimensional image for stereoscopic viewing from data sets Tr ′ and Tr ″ configured from a set of cross-sectional slices (tomographic images) used during normal observation in a two-dimensional image. Since the cross section viewed in stereo is thin, a sufficient three-dimensional effect cannot be obtained, and it is premised on normal tomosynthesis imaging, and the exposure dose of the subject may increase.

That is, as shown in FIG. 5, if you want to shoot a region of interest 50 in the subject 30 on the image capturing base 26, by moving the X-ray source 24 from the imaging position S ₀ to S _e, the projection of a plurality of X-ray images Data is detected by an X-ray detector (FPD) 28, and an X-ray tomographic image set 56 in which a plurality of thin X-ray tomographic images are combined is acquired. However, even if a three-dimensional image is generated with this thin X-ray tomographic image, a sufficient stereoscopic effect cannot be obtained, and in order to grasp the entire image of the region of interest 50, many X-ray tomographic images are viewed. There was a need.

  Further, in a three-dimensional display (stereoscopic view) using a normal X-ray image, a stereoscopic effect can be obtained, but a diagnosis is made when the influence of a tissue (for example, a bone) that disturbs a region of interest (for example, a lesion) is large. It has become difficult to overlook, and further work-up (CT, MRI, etc.) has to be performed.

  An object of the present invention is to reconstruct an X-ray tomographic image with a thickness including a set region of interest and display it three-dimensionally, thereby reducing the number of X-ray images to be taken and reducing the exposure dose and the imaging time. X-ray image capturing apparatus and X-ray image capturing method capable of obtaining a three-dimensional image of an X-ray tomographic image that can be obtained and has a sufficient stereoscopic effect and is less affected by a tissue that disturbs the region of interest And to provide a program.

  In order to solve the above-described problems, the present invention is an X-ray imaging apparatus that reconstructs an X-ray tomographic image by moving an X-ray source to acquire a plurality of X-ray images, and sets a region of interest. An area setting unit, an imaging control unit that acquires projection data of the plurality of X-ray images according to each imaging position of the X-ray source, and a left eye field among the projection data of the plurality of X-ray images. First image reconstruction means for reconstructing the X-ray tomographic image for the left eye having a thickness including the region of interest from projection data of the plurality of X-ray images at the corresponding imaging position of the X-ray source; Among the projection data of the plurality of X-ray images, the projection for the right eye having a thickness including the region of interest from the projection data of the plurality of X-ray images at the imaging position of the X-ray source corresponding to the visual field of the right eye. Second image reconstruction means for reconstructing an X-ray tomographic image, and the X-ray for the left eye A three-dimensional image generating unit that generates a three-dimensional image from the layer image and the X-ray tomographic image for the right eye, and a display unit that displays the three-dimensional image in a stereo viewable manner. An X-ray imaging apparatus is provided.

Moreover, it is preferable that the projection data of the plurality of X-ray images include imaging position information of the X-ray sources that are respectively captured.
Further, the projection data of the plurality of X-ray images used for reconstruction of the X-ray tomographic images for the left eye and the right eye overlap the imaging positions of the X-ray sources for the left eye and the right eye, respectively. It is preferable to include projection data of an X-ray image.
Further, the projection data of the plurality of X-ray images used for reconstruction of the X-ray tomographic images for the left eye and the right eye overlap the imaging positions of the X-ray sources for the left eye and the right eye, respectively. X-ray image projection data is preferably not included.

  In order to solve the above-mentioned problem, the present invention is an X-ray imaging method for reconstructing an X-ray tomographic image by moving an X-ray source and imaging a plurality of X-ray images. A region setting step to be set; an imaging control step of acquiring projection data of the plurality of X-ray images according to each imaging position of the X-ray source; and the left eye of the projection data of the plurality of X-ray images A first image reconstruction step of reconstructing the X-ray tomographic image for the left eye having a thickness including the region of interest from projection data of the plurality of X-ray images at the imaging position of the X-ray source corresponding to the visual field And from among the projection data of the plurality of X-ray images, for the right eye having a thickness including the region of interest from the projection data of the plurality of X-ray images at the imaging position of the X-ray source corresponding to the visual field of the right eye A second image reconstruction step for reconstructing the X-ray tomographic image of A three-dimensional image generating step for generating a three-dimensional image from the left-eye X-ray tomographic image and the right-eye X-ray tomographic image, and a display step for displaying the three-dimensional image in a stereo viewable manner. And providing an X-ray image capturing method.

  Furthermore, in order to solve the said subject, this invention provides the program for making a computer perform each step of the X-ray imaging method described above as a procedure.

  According to the present invention, an X-ray tomographic image is reconstructed and displayed three-dimensionally with a thickness including a set region of interest, thereby reducing the number of X-ray images to be taken and reducing the exposure dose and the imaging time. Can be achieved. In addition, since the X-ray tomographic image is reconstructed to be thicker than before and displayed in three dimensions, the number of X-ray tomographic images can be reduced by reducing the number of X-ray tomographic images. A sufficient three-dimensional effect can be obtained while eliminating the influence of the tissue that disturbs the region of interest.

1 is a block diagram of an embodiment showing a configuration of an X-ray imaging apparatus according to the present invention. It is explanatory drawing which shows the image which looked at an example of the X-ray tomographic image reconfigure | reconstructed by the thickness containing a region of interest from the side. It is a flowchart which shows an example of the flow of a process in the X-ray imaging apparatus which concerns on this invention. (A) And (B) is a conceptual diagram showing the mode at the time of the reconstruction of the X-ray tomographic image by tomosynthesis imaging | photography. It is explanatory drawing which shows the image which looked at an example of the conventional X-ray tomographic image from the side.

  An X-ray imaging apparatus according to the present invention that implements an X-ray imaging method according to the present invention will be described in detail below based on a preferred embodiment shown in the accompanying drawings.

FIG. 1 is a block diagram of an embodiment showing a configuration of an X-ray imaging apparatus according to the present invention.
An X-ray imaging apparatus 10 shown in FIG. 1 performs tomosynthesis imaging (X-ray imaging) of a subject 30 such as a human body and reconstructs an X-ray tomographic image at a cross section of the subject 30 at an arbitrary height. The X-ray imaging apparatus 10 includes an input unit 12, a control unit 14, an imaging unit 16, an image processing unit 18, a display unit 20, and an output unit 22.

  The input unit 12 is a part for inputting various instructions including an instruction to start imaging, and examples thereof include a mouse and a keyboard. An instruction signal is output from the input unit 12 and input to the control unit 14.

  In accordance with the instruction signal input from the input unit 12, the control unit 14 sets a shooting operation and a region of interest in the shooting unit 16, image processing in the image processing unit 18, screen display in the display unit 20, and output processing in the output unit 22. And a part for outputting a control signal for controlling the operation of the X-ray imaging apparatus 10. Although not shown, the control signal output from the control unit 14 is input to each part of the imaging unit 16, the image processing unit 18, the display unit 20, and the output unit 22.

  The region of interest is input and set by the imaging engineer on the pre-shot image displayed on the display unit 20 or the previously taken X-ray tomographic image with the mouse of the input unit 12 or the like. The thickness of the image is set and output as region of interest information that is part of the control signal. That is, the input unit 12, the control unit 14, and the display unit 20 constitute an area setting unit.

  The imaging unit 16 is a part that performs tomosynthesis imaging of the subject 30 in accordance with a control signal input from the control unit 14, and includes an X-ray source 24, a moving mechanism (not shown) of the X-ray source 24, an imaging table 26, And a flat panel X-ray detector (FPD) 28.

  The X-ray source 24 includes an X-ray tube and a collimator, and is disposed at a position above the subject 30 positioned on the upper surface of the imaging table 26 by a predetermined distance. The irradiation area of the X-rays irradiated from the X-ray tube is limited by a collimator.

  The FPD 28 is disposed on the lower surface of the imaging stand 26 with the X-ray light receiving surface facing upward. The FPD 28 detects and photoelectrically converts X-rays transmitted through the subject 30 and outputs digital image data (projection data) corresponding to the X-ray image of the photographed subject 30. As the FPD 28, various methods such as a direct method for directly converting radiation into electric charges and an indirect method for once converting radiation into light and further converting the converted light into electric signals can be used. Further, the FPD 28 may be configured to be movable with respect to the moving direction of the X-ray source 24.

  When tomosynthesis imaging is performed, the X-ray source 24 is moved in one direction and the X-ray irradiation angle is changed in the direction of the subject 30 by controlling the moving mechanism, and the subject 30 at different imaging angles (fixed time intervals). Are irradiated with X-rays. X-rays emitted from the X-ray source 24 pass through the subject 30 and enter the light receiving surface of the FPD 28, and are detected and photoelectrically converted by the FPD 28, and projection data corresponding to the photographed X-ray image of the subject 30 is obtained. To be acquired.

In the case of tomosynthesis imaging according to the present invention, a plurality of images (for example, 10 to 20) having a smaller number of imaging angles than the normal imaging (for example, 20 to 80 images) of the subject 30 by a single imaging operation. Sheet) X-ray images are taken, and projection data corresponding to the plurality of photographed X-ray images are sequentially output from the FPD 28.
Thus, the control unit 14 and the imaging unit 16 constitute an imaging control unit.

  Subsequently, the image processing unit 18 receives projection data of a plurality of X-ray images acquired by the imaging unit 16 in accordance with a control signal input from the control unit 14, and receives the projection data of the plurality of X-ray images. This is a part for performing image processing (including correction processing, image composition processing, etc.) to reconstruct the X-ray tomographic images for the left and right eyes in a cross section of the subject 30 at an arbitrary height. That is, it is an image reconstruction means. The image processing unit 18 includes a storage unit 32, a correction unit 34, a first image reconstruction unit 36, a second image reconstruction unit 38, and a 3D image generation unit 40.

The storage unit 32 stores projection data of a plurality of X-ray images acquired by the imaging unit 16.
The correction unit 34 includes, for example, offset correction, afterimage correction, gain correction, defective pixel correction, step correction, vertical unevenness correction, and horizontal unevenness correction for the projection data of a plurality of X-ray images stored in the storage unit 32. Various correction processes are performed. Note that the offset correction, afterimage correction, gain correction, defective pixel correction, step correction, vertical unevenness correction, and horizontal unevenness correction exemplified here are known correction processes and should be performed by various methods including known methods. Can do.

  The first image reconstruction unit 36 includes a plurality of X-ray images at the imaging position of the X-ray source 24 corresponding to the visual field of the left eye among the projection data of the plurality of X-ray images after the correction processing by the correction unit 34. By performing image composition processing using the projection data of the left eye, an X-ray tomographic image for the left eye in a cross section having a thickness including the region of interest of the subject 30 is reconstructed.

  The second image reconstruction unit 38 includes a plurality of X-ray images at the imaging position of the X-ray source 24 corresponding to the visual field of the right eye among the projection data of the plurality of X-ray images after the correction processing by the correction unit 34. By performing the image composition process using the projection data, the X-ray tomographic image for the right eye in the cross section having a thickness including the region of interest of the subject 30 is reconstructed.

Reconstruction of the respective X-ray tomographic images for the right and left eyes, for example, from the shooting position S ₀ to S _e of the X-ray source 24 shown in FIG. 2, S ₀ to S as an imaging position corresponding to the left eye field of view An X-ray tomographic image for the left eye is reconstructed using the projection data of the _e-x X-ray image. Further, using the projection data of the X-ray image of S _x to S _e as an imaging position corresponding to the right eye field of view is reconstructed X-ray tomographic image for the right eye. Here, as shown in FIG. 2, the cross-section 54 of the left-eye and right-eye X-ray tomographic images is reconstructed to be thicker than the cross-section of the normal X-ray tomographic image, avoiding the tissue 52 that obstructs the region of interest. The
In the above example, the projection data of the X-ray image used for the reconstruction of the X-ray tomographic images for the left and right eyes overlapped in the central part, but the whole is divided into left and right halves and does not overlap. X-ray tomographic images for the left and right eyes may be reconstructed using the projection data of the X-ray images.

  In the three-dimensional image generation unit 40, the X-ray tomographic images for the left and right eyes are set, and the data of the X-ray tomographic image is processed into data that can be displayed by display means corresponding to the display of the three-dimensional image. A three-dimensional image set is output. For example, the left and right eye X-ray tomographic images are set as a three-dimensional image set in which information indicating which of the left and right eyes is an X-ray tomographic image is added.

  The image processing unit 18 may be configured by hardware (apparatus), or may be configured by a program for causing a computer to execute a part of the X-ray image processing method according to the present invention.

  Subsequently, the display unit 20 is a part that three-dimensionally displays an X-ray tomographic image or the like reconstructed by the image processing unit 18 according to a control signal input from the control unit 14 and made into a three-dimensional image set. Examples of the device that realizes the three-dimensional display include a flat panel display such as a liquid crystal display and a plasma display corresponding to the three-dimensional display, or a projector.

  In addition, as a method of three-dimensional display (stereo viewing), for example, (1) applying orthogonal linearly polarized light to the left-eye and right-eye X-ray tomographic images, respectively, and performing stereo viewing using polarized glasses (2) A method of performing stereo vision using glasses equipped with a liquid crystal shutter synchronized with display means by alternately displaying left-eye and right-eye X-ray tomographic images, and (3) left-eye and right-eye A method of displaying red and blue light superimposed on each X-ray tomographic image for stereo viewing using glasses with red and blue color filters on the left and right, and (4) using a lenticular lens And a method of performing stereo vision.

  The output unit 22 is a part that outputs a three-dimensional image set of X-ray tomographic images reconstructed by the image processing unit 18 in accordance with a control signal input from the control unit 14. For example, the output unit 22 prints a three-dimensional image. Examples include a printer that outputs data, a storage device that stores data of a three-dimensional image set in various recording media, and the like.

  Next, the operation of the X-ray image capturing apparatus 10 according to the present invention for realizing the X-ray image capturing method according to the present invention will be described.

FIG. 3 is a flowchart showing an example of the processing flow of the X-ray imaging method according to the present invention.
When an instruction signal for starting imaging is input from the input unit 12 to the control unit 14, the control unit 14 sets a three-dimensional image set previously captured for the same imaging region of the subject based on information such as the imaging region. Alternatively, the presence / absence of an X-ray tomographic image (hereinafter referred to as past image data) is determined (step S10). The control unit 14 searches past image data of the same imaging region of the subject from past image data stored in a storage device that is one of the output units 22, and stores past images of the same imaging region of the subject. If there is data, the previous image data of the same imaged part imaged last time is read (“Y” in step S10).

  If there is no past image data of the same imaged part of the subject as a result of searching for the past image data of the same imaged part of the subject (“N” in step S10), the control unit 14 determines to the imager 16. Then, a control signal is output so as to capture a pre-shot image in a range where the position of the region of interest in the subject can be known (for example, the entire abdomen), and the pre-shot image is captured (step S12).

  The pre-shot image or the past image is displayed on the display unit 20. Here, the region of interest is set on the pre-shot image or the past image by the imaging engineer, and the region of interest information is input from the input unit 12 (step S14).

  The control unit 14 generates control information of the imaging position of the X-ray source 24 based on the region-of-interest information. The imaging unit 16 controls the movement mechanism to control the X-ray source 24 in one direction according to an instruction to start imaging. While moving, the irradiation angle of the X-ray source 24 is changed in the direction of the subject 30, the subject 30 is irradiated with X-rays at different irradiation angles, and a plurality of X-ray images having different imaging angles are obtained by one imaging operation. Images are taken sequentially from the shooting start position (step S16). Each time an X-ray image of the subject 30 is captured, projection data corresponding to the captured X-ray image is output from the FPD 28. In the present embodiment, a desired region is determined when imaging is performed using past image data (tomosynthesis image) or a pre-shot image. However, as in general tomosynthesis imaging, Needless to say, the technician may determine the imaging region by visual observation or the like.

In the image processing unit 18, projection data of a plurality of X-ray images including the region of interest acquired by the imaging unit 16 is stored in the storage unit 32, and various corrections such as offset correction and afterimage correction are performed by the correction unit 34. Processing is performed.
The first image reconstruction unit 36 and the second image reconstruction unit 38 correspond to the visual fields of the left and right eyes using projection data of a plurality of X-ray images including the region of interest after the correction processing by the correction unit 34. X-ray tomographic images for the left and right eyes in a cross section having a thickness including the region of interest of the subject 30 are reconstructed from projection data of a plurality of X-ray images at the imaging position of the X-ray source 24. The That is, one set of thick X-ray tomographic images is reconstructed (step S18). The reconstructed X-ray tomographic image is not limited to one set, and a plurality of sets may be used.

  The X-ray tomographic images for the left and right eyes are input to the three-dimensional image generation unit 40. In the three-dimensional image generation unit 40, the X-ray tomographic images for the left and right eyes are set as one set, and the data of the X-ray tomographic image is processed into data that can be displayed by display means corresponding to the display of the three-dimensional image. A three-dimensional image set is output (step S20).

The three-dimensional image set (respective X-ray tomographic images for the left and right eyes) output from the three-dimensional image generation unit 40 is three-dimensionally displayed on the display unit 20. Note that information on the display state of the X-ray tomographic image may be displayed on the display unit 20 under the control of the control unit 14.
The 3D image set (respective X-ray tomographic images for the left and right eyes) output from the 3D image generation unit 40 is input to the output unit 22, and for example, a 3D image is printed out by the output unit 22. Then, the data of the three-dimensional image set is stored in the recording medium (step S22).

  As described above, the X-ray tomographic image is reconstructed and displayed three-dimensionally with the thickness including the set region of interest, thereby reducing the number of X-ray images to be taken and reducing the exposure dose and the imaging time. be able to. In addition, since the X-ray tomographic image is reconstructed to be thicker than before and displayed in three dimensions, the number of X-ray tomographic images can be reduced by reducing the number of X-ray tomographic images. A sufficient three-dimensional effect can be obtained while eliminating the influence of the tissue that disturbs the region of interest.

In addition, using an X-ray tomographic image around the region of interest (lesion) makes the image easy to diagnose, prevents oversight and misdiagnosis, and reduces precision examinations in other modalities (CT, MRI, etc.). it can. Furthermore, it is possible to grasp the three-dimensional structure by paying attention to the image near the lesioned part.
Moreover, at the time of surgery simulation, a doctor can grasp | ascertain the context of a structure | tissue by a three-dimensional image instead of grasping | ascertaining the three-dimensional structure of the structure | tissue context in a head from a past experience from a two-dimensional image. Therefore, oversight of inexperienced doctors and non-specialists can be reduced, and surgery simulation can be easily performed.

  The X-ray image capturing apparatus, the X-ray image capturing method, and the program according to the present invention have been described in detail above. However, the present invention is not limited to the above-described embodiment, and the scope of the present invention is not deviated. Various improvements and changes may be made.

DESCRIPTION OF SYMBOLS 10 X-ray imaging device 12 Input part 14 Control part 16 Imaging part 18 Image processing part 20 Display part 22 Output part 24 X-ray source 26 Imaging stand 28 X-ray detector (FPD)
DESCRIPTION OF SYMBOLS 30 Subject 32 Memory | storage part 34 Correction | amendment part 36 1st image reconstruction part 38 2nd image reconstruction part 40 3D image generation part 50 Region of interest 52 Tissue 54 Section

Claims (6)

An X-ray imaging apparatus that moves a X-ray source to capture a plurality of X-ray images and reconstructs an X-ray tomographic image,
A region setting means for setting a region of interest;
Imaging control means for acquiring projection data of the plurality of X-ray images according to the imaging positions of the X-ray source;
Among the projection data of the plurality of X-ray images, the projection for the left eye having a thickness including the region of interest from the projection data of the plurality of X-ray images at the imaging position of the X-ray source corresponding to the visual field of the left eye. First image reconstruction means for reconstructing an X-ray tomographic image;
Among the projection data of the plurality of X-ray images, the projection for the right eye having a thickness including the region of interest from the projection data of the plurality of X-ray images at the imaging position of the X-ray source corresponding to the visual field of the right eye. Second image reconstruction means for reconstructing an X-ray tomographic image;
3D image generation means for generating a 3D image from the X-ray tomographic image for the left eye and the X-ray tomographic image for the right eye;
An X-ray imaging apparatus comprising: a display unit configured to display the three-dimensional image in a stereo view.   The X-ray image photographing apparatus according to claim 1, wherein the projection data of the plurality of X-ray images includes photographing position information of the photographed X-ray source.   The projection data of the plurality of X-ray images used for the reconstruction of the X-ray tomographic images for the left eye and the right eye are the X-rays whose imaging positions of the X-ray sources overlap for the left eye and for the right eye. The X-ray imaging apparatus according to claim 1, further comprising image projection data.   The projection data of the plurality of X-ray images used for the reconstruction of the X-ray tomographic images for the left eye and the right eye are the X-rays whose imaging positions of the X-ray sources overlap for the left eye and for the right eye. The X-ray imaging apparatus according to claim 1, wherein the apparatus does not include image projection data. An X-ray imaging method for reconstructing an X-ray tomographic image by moving a X-ray source and capturing a plurality of X-ray images,
A region setting step for setting a region of interest;
An imaging control step of acquiring projection data of the plurality of X-ray images according to each imaging position of the X-ray source;
Among the projection data of the plurality of X-ray images, the projection for the left eye having a thickness including the region of interest from the projection data of the plurality of X-ray images at the imaging position of the X-ray source corresponding to the visual field of the left eye. A first image reconstruction step for reconstructing an X-ray tomographic image;
Among the projection data of the plurality of X-ray images, the projection for the right eye having a thickness including the region of interest from the projection data of the plurality of X-ray images at the imaging position of the X-ray source corresponding to the visual field of the right eye. A second image reconstruction step for reconstructing an X-ray tomographic image;
A three-dimensional image generation step of generating a three-dimensional image from the left-eye X-ray tomographic image and the right-eye X-ray tomographic image;
A display step of displaying the three-dimensional image in a stereo viewable manner.   A program for causing a computer to execute each step of the X-ray image capturing method according to claim 5 as a procedure.

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