X-ray imaging apparatus

Abstract

To provide an X-ray imaging apparatus capable of suppressing an increase in an exposure dose due to re-imaging of an X-ray image or extension of a fluoroscopic imaging time caused by interference of a top plate part installation member with an X-ray irradiation field by making a user recognize that the top plate part installation member interferes with the X-ray irradiation field.SOLUTION: The X-ray imaging apparatus 100 includes an X-ray imaging unit 3 including an X-ray irradiation unit 31 that emits X-rays and an X-ray detection unit 32 that detects X-rays, a top plate 1 on which a subject 9 is placed and which is movable relative to the X-ray imaging unit 3, a top plate installing member 2 provided on the top plate 1 and including a material having a lower X-ray transmittance than a portion of the top plate 1 on which the subject 9 is placed, a notification unit 6, and a control unit 5 that performs control to cause the notification unit 6 to notify that the top plate installing member 2 interferes with the irradiation field based on irradiation field range information on a range of an irradiation field of X-rays emitted from the X-ray irradiation unit 31 and member position information on a position of the top plate installing member 2.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to an X-ray imaging apparatus. [Background technology]

[0002] BACKGROUND ART Conventionally, X-ray imaging devices are known (see, for example, Patent Documents 1 and 2).

[0003] The above-mentioned Patent Document 1 discloses a proximity operation type X-ray fluoroscopic imaging device (X-ray imaging device). The X-ray fluoroscopic imaging device disclosed in the above-mentioned Patent Document 1 includes a tabletop (tabletop unit), a first X-ray imaging unit including a first X-ray irradiator and a first X-ray detector, a second X-ray imaging unit including a second X-ray irradiator and a second X-ray detector, and an operation unit. X-ray imaging is performed by operating the operation unit. Note that the proximity operation type X-ray imaging device is an X-ray imaging device that allows a user to use the operation unit to perform fluoroscopic imaging and the like at a position close to a subject.

[0004] Furthermore, Patent Document 2 discloses a remote-controlled X-ray imaging device. The X-ray imaging device disclosed in Patent Document 2 includes an operation unit and a display unit installed in an operation room, and a fluoroscopic imaging table installed in an examination room. The fluoroscopic imaging table includes a tabletop (tabletop unit), an X-ray irradiation unit, and an X-ray detection unit disposed below the surface of the tabletop in a position facing the X-ray irradiation unit. Note that the remote-controlled X-ray imaging device is an X-ray imaging device in which the imaging room and the operation room are separate, and a user can perform fluoroscopic imaging and the like in the operation room using the operation unit. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Publication No. 2020-192092 [Patent Document 2] Patent No. 7021707 Summary of the Invention [Problem to be solved by the invention]

[0006] Although not explicitly stated in Patent Documents 1 and 2, the X-ray imaging devices described in these documents have a tabletop that can be moved at least in the longitudinal direction of the tabletop, and tabletop movement rails for moving the tabletop in the longitudinal direction are provided at both ends of the tabletop in the lateral direction. Furthermore, in the proximity-controlled X-ray imaging device described in Patent Document 1 and the remote-controlled X-ray imaging device described in Patent Document 2, the tabletop can be moved in the lateral direction of the tabletop. Furthermore, in the proximity-controlled X-ray imaging device described in Patent Document 1, the first detector can be moved in the lateral direction of the tabletop. Here, in both the proximity-controlled X-ray imaging device and the remote-controlled X-ray imaging device, for example, when X-raying a subject's chest, the SID (Source to Image Receptor Distance) can be increased. SID refers to the distance from the focal point of the X-ray source to the detector. In situations where the SID is large during X-ray imaging, when the tabletop of a close-range or remote-controlled X-ray imaging device is moved in the transverse direction, or when the first detector of a close-range X-ray imaging device is moved in the transverse direction, the tabletop rails of the tabletop may appear in the X-ray image. In other words, the tabletop rails may interfere with the X-ray irradiation field. Interference of the tabletop rails (tabletop installation components) with the X-ray irradiation field during X-ray imaging can make the object difficult to see due to overlap between the tabletop rails and the object, or can cause image quality degradation such as insufficient contrast of the object during the automatic brightness adjustment process of the X-ray imaging device. In this case, radiation exposure may increase due to the need to retake X-ray images or extended fluoroscopy time. Therefore, it is desirable to prevent increased radiation exposure due to the need to retake X-ray images or extended fluoroscopy time caused by interference of the tabletop installation components with the X-ray irradiation field by informing the user that the tabletop installation components are interfering with the X-ray irradiation field.

[0007] This invention has been made to solve the above-mentioned problems, and one object of the invention is to provide an X-ray imaging device that can prevent an increase in radiation exposure due to the need to retake X-ray images or an extension of the fluoroscopic imaging time caused by interference of a top panel installation member with the X-ray irradiation field by making the user aware that the top panel installation member is interfering with the X-ray irradiation field. [Means for solving the problem]

[0008] In one aspect of the present invention, an X-ray imaging device includes an X-ray imaging unit including an X-ray irradiation unit that irradiates a subject with X-rays and an X-ray detection unit that detects X-rays that have passed through the subject; a top panel on which the subject is placed and which is movable relative to the X-ray imaging unit; a top panel installation member that is provided on the top panel and includes a material with lower X-ray transmittance than the portion of the top panel on which the subject is placed; an alarm unit; and a control unit that controls the alarm unit to notify that the top panel installation member is interfering with the irradiation field based on irradiation field range information regarding the range of the irradiation field of X-rays irradiated from the X-ray irradiation unit and member position information regarding the position of the top panel installation member. [Effects of the Invention]

[0009] In the X-ray imaging apparatus according to the above aspect, the control unit controls the notification unit to notify the user that the top installation member is interfering with the irradiation field, based on irradiation field range information regarding the range of the irradiation field of X-rays irradiated from the X-ray irradiation unit and component position information regarding the position of the tabletop installation member. The notification unit then notifies the user that the tabletop installation member is interfering with the irradiation field, allowing the user to recognize that the tabletop installation member is interfering with the irradiation field. This allows the user to eliminate the interference of the tabletop installation member with the irradiation field. As a result, it is possible to prevent an increase in radiation exposure due to the need to retake an X-ray image or an extension of the fluoroscopic imaging time, which would be caused by the interference of the tabletop installation member with the irradiation field. [Brief explanation of the drawings]

[0010] [Figure 1]1 is a schematic diagram showing the overall configuration of an X-ray imaging apparatus according to a first embodiment. [Figure 2] FIG. 2 is a cross-sectional view taken along line II-II in FIG. [Figure 3] 1 is a functional block diagram of an X-ray imaging apparatus according to a first embodiment. [Figure 4] FIG. 10 is a schematic diagram of a state before interference in a display of an interference information image relating to the tabletop moving rail. [Figure 5] 10 is a schematic diagram showing a state in which interference occurs in a display of an interference information image relating to the top board moving rails. FIG. [Figure 6] 10 is a schematic diagram of a state before interference in a display of an interference information image relating to a second X-ray detection unit moving member. FIG. [Figure 7] 10 is a schematic diagram showing a state in which interference occurs in a display of an interference information image relating to a second X-ray detection unit moving member. FIG. [Figure 8] FIG. 10 is a functional block diagram of an X-ray imaging apparatus according to a second embodiment. [Figure 9] FIG. 10 is a schematic diagram showing the overall configuration of an X-ray imaging apparatus according to a third embodiment. [Figure 10] FIG. 10 is a functional block diagram of an X-ray imaging apparatus according to a third embodiment. [Figure 11] FIG. 10 is a functional block diagram of an X-ray imaging apparatus according to a fourth embodiment. [Figure 12] FIG. 10 is a schematic diagram of a state before interference in a display of an interference information image relating to the tabletop moving rail. [Figure 13] 10 is a schematic diagram showing a state in which interference occurs in a display of an interference information image relating to the top board moving rails. FIG. [Figure 14] 10 is a schematic diagram of a state before interference in a display of an interference information image relating to a second X-ray detection unit moving member. FIG. [Figure 15] 10 is a schematic diagram showing a state in which interference occurs in a display of an interference information image relating to a second X-ray detection unit moving member. FIG. [Figure 16] FIG. 10 is a schematic diagram showing the overall configuration of an X-ray imaging apparatus according to a first modified example. [Figure 17] FIG. 10 is a functional block diagram of an X-ray imaging apparatus according to a first modified example. [Figure 18] FIG. 10 is a schematic diagram showing a second superimposed image. [Figure 19] FIG. 10 is a schematic diagram showing the overall configuration of an X-ray imaging apparatus according to a second modified example. [Figure 20] FIG. 11 is a schematic diagram showing the overall configuration of an X-ray imaging apparatus according to a third modified example. DETAILED DESCRIPTION OF THE INVENTION

[0011] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

[0012] [First embodiment] (Configuration of X-ray equipment) The configuration of an X-ray imaging apparatus 100 according to this embodiment will be described with reference to FIGS.

[0013] 1, the X-ray imaging device 100 includes a tabletop unit 1, a tabletop installation member 2, a first X-ray imaging unit 30, a second X-ray imaging unit 33, an optical imaging unit 4, a control unit 5 (see FIG. 3), a notification unit 6 (see FIG. 3), and an operation unit 7. The X-ray imaging device 100 is configured to irradiate a subject 9 with X-rays and acquire an X-ray image.

[0014] The top panel unit 1 includes a top panel 10 and a top panel support part 11. The top panel 10 is configured to allow a subject 9 to be placed thereon. The top panel 10 has a placement surface 10a on which the subject 9 is placed. In this specification, the X direction is the longitudinal direction of the top panel 10 when the top panel 10 is in a horizontal position. The Y direction is the lateral direction of the top panel 10 when the top panel 10 is in a horizontal position. The Z direction is the vertical direction.

[0015] FIG. 2 is a cross-sectional view taken along line II-II in FIG. 1. As shown in FIG. 2, the tabletop support unit 11 includes a base 12, a first support column 13, a holder 14, a main frame 15, and a second support column 16. For ease of explanation, the subject 9 and the second X-ray imaging unit 33, excluding the second X-ray irradiation unit 34, are not shown in FIG. 2. In the X-ray imaging device 100, the first support column 13 is fixed to the base 12, and a main frame 15, on which the tabletop 10 is mounted via the holder 14, is held by the first support column 13. The second support column 16 is further held by a connecting member 17, and the main frame 15, the second support column 16, the holder 14, and the first support column 13 are arranged in this order from the Y1 side to the Y2 direction. The tabletop 10 is supported by the main frame 15 via a tabletop moving rail 20, which will be described later. FIG. 2 shows an example of the structure of the X-ray imaging device 100.

[0016] The top plate 10 is configured to move up and down together with the second support column 16 and the main frame 15 in the vertical direction (Z direction) as the holder 14 moves up and down around the first support column 13 as an axis by the holder drive unit 83. The top plate 10 is also configured to rotate together with the second support column 16 and the main frame 15 as the holder 14 rotates around the first support column 13 as an axis by a rotation mechanism (not shown).

[0017] The top plate 10 is configured to slide in the longitudinal direction (X direction) of the top plate unit 1 via top plate moving rails 20 by a first top plate driving unit 84. The top plate 10 is configured to slide in the lateral direction (Y direction) of the top plate unit 1 via a moving member (not shown) by a second top plate driving unit 85. In other words, the top plate 10 is configured to be movable relative to the first X-ray imaging unit 30 and the second X-ray imaging unit 33.

[0018] As shown in FIG. 1, the top panel installation member 2 is provided on the top panel 1. The top panel installation member 2 is disposed between a first X-ray irradiation unit 31 and a first X-ray detection unit 32. The top panel installation member 2 includes a top panel movement rail 20 and a second X-ray detection unit movement member 21. The top panel installation member 2 is configured to include a material having a lower X-ray transmittance than the portion of the top panel 1 on which the subject 9 is placed. Specifically, the top panel installation member 2 is configured to include a metal portion having a lower X-ray transmittance than the portion of the top panel 1 on which the subject 9 is placed.

[0019] The top plate moving rails 20 (see FIG. 4(a)) are provided at both ends of the top plate portion 1 in the short direction. The top plate moving rails 20 are provided below the top plate 10. The top plate moving rails 20 are configured to engage with engaging portions provided on the surface of the top plate 10 opposite the placement surface 10a, and to slide the top plate 10 in the longitudinal direction (X direction) of the top plate portion 1. The top plate moving rails 20 are made of a metal material.

[0020] The second X-ray detection unit moving member 21 is provided on the top panel 1. The second X-ray detection unit moving member 21 is provided below the top panel 10. The second X-ray detection unit 35 arranged on the top panel 1 is placed on the second X-ray detection unit moving member 21. The second X-ray detection unit moving member 21 is configured to move together with the placed second X-ray detection unit 35 in the longitudinal direction (X direction) of the top panel 1 below the top panel 10. The second X-ray detection unit moving member 21 is moved in the longitudinal direction (X direction) of the top panel 1 by a second X-ray detection unit driving unit 86. The second X-ray detection unit moving member 21 is, for example, a metal tray. The second X-ray detection unit moving member 21 is included in the X-ray detection unit moving member.

[0021] The first X-ray imaging unit 30 and the second X-ray imaging unit 33 are used to perform fluoroscopic imaging or X-ray imaging of the imaging region of the subject 9 placed on the tabletop 10. Here, fluoroscopic imaging refers to a method of obtaining a moving image of the imaging region while irradiating it with X-rays. X-ray imaging refers to a method of obtaining a still image of the imaging region by irradiating it with X-rays.

[0022] The first X-ray imaging unit 30 includes a first X-ray irradiator 31 and a first X-ray detector 32. The second X-ray imaging unit 33 includes a second X-ray irradiator 34 and a second X-ray detector 35. The first X-ray imaging unit 30 and the second X-ray imaging unit 33 are included in the X-ray imaging unit 3. The first X-ray imaging unit 30 and the second X-ray imaging unit 33 are an example of an "X-ray imaging unit" in the claims. The first X-ray irradiator 31 and the second X-ray irradiator 34 are an example of an "X-ray irradiator" in the claims. The first X-ray detector 32 and the second X-ray detector 35 are an example of an "X-ray detector" in the claims.

[0023] The first X-ray imaging unit 30 includes a first X-ray irradiator 31 arranged on the top panel 1, and a first X-ray detector 32 arranged at a position facing the first X-ray irradiator 31 across the top panel 10. The first X-ray imaging unit 30 is held by the second support column 16. The first X-ray irradiator 31 is arranged on the Z2 side of the second support column 16, and the first X-ray detector 32 is arranged on the Z1 side via a connecting member 17 (see FIG. 2).

[0024] A second support column driver 87 is provided on the second support column 16. The second support column driver 87 includes a motor and is configured to move the second support column 16 linearly in the longitudinal direction (X direction) of the tabletop 10 and the lateral direction (Y direction) of the tabletop 10. As a result, the first X-ray imaging unit 30, which includes the first X-ray irradiator 31 and the first X-ray detector 32 supported by the second support column 16, is configured to move linearly as a unit while maintaining an opposing state. In other words, the first X-ray imaging unit 30 is configured to be movable relative to the tabletop 10.

[0025] The first X-ray irradiator 31 is provided on the opposite side (Z2 side) of the tabletop 10 from the support surface 10a. The first X-ray irradiator 31 is held by the second support column 16. As the second support column 16 is moved in the longitudinal direction (X direction) of the tabletop 10 and the lateral direction (Y direction) of the tabletop 10, the position of the first X-ray irradiator 31 in the longitudinal direction (X direction) of the tabletop 10 and the lateral direction (Y direction) of the tabletop 10 changes.

[0026] The first X-ray irradiator 31 includes an X-ray tube 31a (see FIG. 2) and a collimator 31b (see FIG. 2). The X-ray tube 31a irradiates X-rays toward the first X-ray detector 32. The X-ray tube 31a irradiates X-rays in the Z1 direction. The collimator 31b includes a plurality of shielding members. The collimator 31b is configured to adjust a first irradiation field of X-rays irradiated from the X-ray tube 31a included in the first X-ray irradiator 31 using the plurality of shielding members. In this specification, the irradiation field of X-rays refers to a space between the X-ray tube and the X-ray detector of the X-ray irradiator, where X-rays are irradiated. Therefore, the first irradiation field refers to a space between the X-ray tube 31a of the first X-ray irradiator 31 and the first X-ray detector 32, where X-rays are irradiated.

[0027] The first X-ray detection unit 32 is provided at a position (on the Z1 side) facing the first X-ray irradiator 31 across the tabletop 10. The first X-ray detection unit 32 is, for example, an FPD (flat panel detector). The first X-ray detection unit 32 is configured to detect X-rays irradiated from the first X-ray irradiator 31 and transmitted through the subject 9. Note that the first X-ray detection unit 32 is not limited to a flat panel detector, and may be an image intensifier.

[0028] The first X-ray detection unit 32 is held by the second support column 16 via a connecting member 17 (see FIG. 2 ). As the second support column 16 is moved in the longitudinal direction (X direction) of the tabletop 10 and the lateral direction (Y direction) of the tabletop 10, the position of the first X-ray detection unit 32 in the longitudinal direction (X direction) and the lateral direction (Y direction) of the tabletop 10 changes. The first X-ray detection unit 32 is attached with a handle that can be held by a user, and the user moves the second support column 16 in the longitudinal direction (X direction) and the lateral direction (Y direction) of the tabletop 10 via the handle. The second support column drive unit 87 that drives the second support column 16 has a motor, so that the user can easily move the first X-ray imaging unit 30 in the longitudinal direction (X direction) and the lateral direction (Y direction) of the tabletop 10.

[0029] The second X-ray imaging unit 33 includes a second X-ray detection unit 35 arranged on the top panel 1 and a second X-ray irradiation unit 34 arranged on the opposite side of the top panel 10 from the second X-ray detection unit 35.

[0030] The second X-ray detection unit 35 is disposed on the opposite side (Z2 side) of the tabletop 10 from the support surface 10a. The second X-ray detection unit 35 is located between the first X-ray irradiator 31 and the tabletop 10 in the Z direction. The second X-ray detection unit 35 is placed on a second X-ray detection unit moving member 21. The second X-ray detection unit 35 is, for example, an FPD (flat panel detector). The second X-ray detection unit 35 is configured to detect X-rays irradiated from the second X-ray irradiator 34 and transmitted through the subject 9.

[0031] The second X-ray irradiator 34 is supported by a second X-ray irradiator moving mechanism 80 provided on the ceiling of the room in which the X-ray imaging device 100 is placed. The second X-ray irradiator moving mechanism 80 includes a rail 81 and an extendable support 82. The second X-ray irradiator 34 is configured to be movable in the horizontal direction (X direction and Y direction) by the rail 81 of the second X-ray irradiator moving mechanism 80, and is configured to be movable in the vertical direction (Z direction) by the support 82 of the second X-ray irradiator moving mechanism 80. A handle that can be held by a user is attached to the second X-ray irradiator 34, and the user can move the second X-ray irradiator 34 in the X direction, Y direction, and Z direction via the handle. In other words, the second X-ray imaging unit 33 is configured to be movable relative to the tabletop 10. The second X-ray irradiator driver 88, which moves the second X-ray irradiator 34, has a motor, so the user can easily move the second X-ray irradiator 34. In addition, the user can adjust the irradiation angle of the second X-ray irradiator 34 with respect to the second X-ray detection unit 35 via the handle.

[0032] The second X-ray irradiator 34 includes an X-ray tube 34a, a collimator 34b, and an irradiation field lamp (not shown). The X-ray tube 34a irradiates X-rays toward the second X-ray detector 35. The X-ray tube 34a irradiates X-rays in the Z2 direction. The collimator 34b includes a plurality of shielding members. The collimator 34b is configured to adjust the second irradiation field of the X-rays irradiated from the X-ray tube 34a included in the second X-ray irradiator 34 using the plurality of shielding members. The second irradiation field is a space between the X-ray tube 34a of the second X-ray irradiator 34 and the second X-ray detector 35 into which X-rays are irradiated. The irradiation field lamp is provided in the collimator 34b. The irradiation field lamp includes a light source of visible light. The visible light irradiated from the irradiation field lamp makes it possible to confirm the second irradiation field without using X-rays.

[0033] The optical imaging unit 4 is configured to capture an optical image 40. The optical imaging unit 4 captures an optical image 40 of the subject 9 placed on the tabletop 10 and the tabletop 1. In this specification, the term "optical image 40" refers to an image obtained by optically detecting visible light reflected by the subject 9 and the tabletop 1. The optical imaging unit 4 includes an optical camera. The optical imaging unit 4 is attached to the first X-ray detection unit 32. The optical imaging unit 4 is attached facing the direction of the first X-ray irradiator 31. The optical imaging unit 4 can capture an optical image 40 in the direction of the subject 9 and the first X-ray irradiator 31 from the first X-ray detection unit 32 side.

[0034] The optical imaging unit 4 images the subject 9 at least during fluoroscopic imaging by the first X-ray imaging unit 30. The optical imaging unit 4 may also image the subject 9 before fluoroscopic imaging by the first X-ray imaging unit 30. The optical imaging unit 4 may also image the subject 9 after X-ray imaging by the first X-ray imaging unit 30. The imaging range of the optical imaging unit 4 is set to include the range of the X-ray irradiation field and to be larger than the range of the X-ray irradiation field.

[0035] 3, the notification unit 6 is configured to issue a notification under the control of the control unit 5. The notification unit 6 includes a display unit 60. The display unit 60 is, for example, a liquid crystal display device. The display unit 60 displays interference information 90 under the control of the control unit 5. Specifically, under the control of the control unit 5, the display unit 60 displays an interference information image 92 as the interference information 90 by superimposing it on the optical image 40 captured by the optical imaging unit 4. The interference information 90 and the interference information image 92 will be described later.

[0036] The control unit 5 is configured to acquire irradiation field range information regarding the range of the irradiation field of X-rays irradiated from the X-ray irradiation unit and component position information regarding the position of the tabletop installation component 2. The control unit 5 is also configured to control the notification unit 6 to notify that the tabletop installation component 2 is interfering with the irradiation field, based on the acquired irradiation field range information and component position information. Specifically, the control unit 5 is configured to cause the display unit 60 to display interference information 90 indicating that the tabletop installation component 2 is interfering with the irradiation field, based on the irradiation field range information and component position information. More specifically, the control unit 5 is configured to cause the display unit 60 to display an interference information image 92 as the interference information 90 indicating the range in which the tabletop installation component 2 interferes in the irradiation field, superimposed on the optical image 40.

[0037] The control unit 5 includes a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory), a GPU (Graphics Processing Unit), or an FPGA (Field-Programmable Gate Array) configured for image processing.

[0038] As shown in FIG. 1 , the operation unit 7 is provided near the first X-ray detection unit 32. A user can use the operation unit 7 to perform various operations related to X-ray imaging and fluoroscopy. In this embodiment, the X-ray imaging device 100 is a so-called close-proximity operation type X-ray imaging device. The operation unit 7 includes, for example, a group of operation switches including an operation switch for operating the movement of the tabletop 10, and a liquid crystal panel that displays information necessary for imaging the subject 9. Here, the close-proximity operation type X-ray imaging device is an X-ray imaging device that allows a user to use the operation unit 7 to perform fluoroscopy and the like at a position close to the subject 9.

[0039] (Each functional block of the control unit) The functional blocks included in the control unit 5 will be described with reference to Fig. 3. The control unit 5, which is made up of hardware such as a CPU, includes, as software (program) functional blocks, a position information acquisition unit 50 and an image generation unit 51. The control unit 5 functions as the position information acquisition unit 50 and the image generation unit 51 by executing a program stored in a storage unit (not shown). The position information acquisition unit 50 and the image generation unit 51 may be configured individually by hardware with dedicated processors (processing circuits) provided therein.

[0040] (Location information acquisition unit) The position information acquisition unit 50 is configured to acquire the range of the first irradiation field of X-rays irradiated from the first X-ray irradiator 31 and component position information related to the position of the tabletop installation member 2. Specifically, when the user selects X-ray photography or fluoroscopic photography using the first X-ray imaging unit 30, the position information acquisition unit 50 is configured to acquire irradiation field range information related to the range of the first irradiation field and component position information related to the positions of the tabletop moving rails 20 and the second X-ray detection unit moving member 21. Note that the range of the first irradiation field includes the range of the X-ray irradiation field when actually irradiated from the first X-ray irradiator 31 and the range of the X-ray irradiation field when irradiated from the first X-ray irradiator 31.

[0041] The position information acquiring unit 50 acquires position information of the tabletop 10 based on, for example, output from a position sensor such as a potentiometer or encoder (not shown) provided in each of the holder driving unit 83, the first tabletop driving unit 84, and the second tabletop driving unit 85 that drive the tabletop 10. The position information acquiring unit 50 also acquires position information of the first X-ray irradiator 31 and the first X-ray detection unit 32 based on, for example, output from a position sensor such as a potentiometer or encoder (not shown) provided in the second support column driving unit 87. The position information acquiring unit 50 also acquires dimensional information of an opening formed by the shielding member of the collimator 31b in the first X-ray irradiator 31 and through which X-rays pass, based on, for example, operation input by the user to the operation unit 7.

[0042] The position information acquisition unit 50 acquires irradiation field range information regarding the range of the first irradiation field based on position information of the tabletop 10, position information of the first X-ray irradiation unit 31 and the first X-ray detection unit 32, and dimensional information of the opening of the collimator 31b in the first X-ray irradiation unit 31.

[0043] Furthermore, the position information acquiring unit 50 acquires member position information regarding the position of the tabletop moving rails 20, for example, based on the acquired position information of the tabletop 10. Furthermore, the position information acquiring unit 50 acquires member position information regarding the position of the second X-ray detection unit moving member 21, for example, based on the output from a position sensor such as a potentiometer or encoder (not shown) provided in the second X-ray detection unit driving unit 86 that moves the second X-ray detection unit moving member 21.

[0044] (Image generation section) As shown in FIGS. 4 to 7 , when the user selects X-ray photography or fluoroscopic photography using the first X-ray photography unit 30, the image generation unit 51 is configured to generate a first superimposed image 91 and display the generated first superimposed image 91 on the display unit 60 of the notification unit 6. The first superimposed image 91 is an image in which an irradiation field image 93 indicating a range 99 of the first irradiation field at a predetermined height position, an image indicating the position of the tabletop installation member 2, and an interference information image 92 as interference information 90 indicating the range in which the tabletop installation member 2 interferes in the first irradiation field are superimposed on the optical image 40 captured by the optical imaging unit 4. That is, the image generation unit 51 is configured to display the interference information image 92 as the interference information 90 included in the first superimposed image 91 on the display unit 60, thereby notifying that the tabletop installation member 2 is interfering with the first irradiation field.

[0045] When the user selects X-ray photography or fluoroscopic photography using the first X-ray photography unit 30, the image generation unit 51 acquires the optical image 40 captured by the optical imaging unit 4. In addition, the image generation unit 51 acquires information on the angle of view of the optical image 40 from the optical imaging unit 4, and acquires position information of the optical imaging unit 4 based on position information of the first X-ray detection unit 32.

[0046] The image generating unit 51 is configured to acquire the range 99 of the first irradiation field at a predetermined height position from the support surface 10a of the tabletop 10 based on irradiation field range information regarding the range of the first irradiation field, and to generate an irradiation field image 93 showing the range 99 of the first irradiation field at the acquired predetermined height position. The irradiation field image 93 showing the range 99 of the first irradiation field at the predetermined height position is, for example, a frame image showing the outer edge of the range 99 of the first irradiation field at the predetermined height position.

[0047] The predetermined height position from the support surface 10a of the tabletop 10 is, for example, a height position 20 cm in the Z1 direction from the support surface 10a of the tabletop 10. Note that the predetermined height position from the support surface 10a of the tabletop 10 is not limited to a height position 20 cm in the Z1 direction from the support surface 10a of the tabletop 10, but may be a height position 10 cm in the Z1 direction from the support surface 10a of the tabletop 10, a height position 30 cm in the Z1 direction from the support surface 10a of the tabletop 10, or a position on the support surface 10a of the tabletop 10 that is 0 cm in the Z1 direction from the support surface 10a of the tabletop 10, and is not particularly limited.

[0048] The image generator 51 is configured to generate an image showing the position of the top board installation member 2 based on component position information related to the position of the top board installation member 2. That is, as shown in FIG. 4(b), the image generator 51 generates an image 94 showing the position of the top board movement rails 20 based on component position information related to the position of the top board movement rails 20, and as shown in FIG. 6(b), generates an image 95 showing the position of the second X-ray detection unit movement member 21 based on component position information related to the position of the second X-ray detection unit movement member 21. The image 94 showing the position of the top board movement rails 20 is, for example, a frame image showing the outer edge of the top board movement rails 20. The image 95 showing the position of the second X-ray detection unit movement member 21 is, for example, a frame image showing the outer edge of the second X-ray detection unit movement member 21. Note that the color of the frame image showing the outer edge of the range of the first irradiation field, the color of the frame image showing the outer edge of the top board movement rails 20, and the color of the frame image showing the outer edge of the second X-ray detection unit movement member 21 are all expressed in different colors.

[0049] In addition, as shown in Figures 5(b) and 7(b), the image generation unit 51 is configured to generate an interference information image 92 as interference information 90 indicating the range in which the tabletop installation member 2 interferes in the first irradiation field based on irradiation field range information and member position information regarding the range of the first irradiation field.

[0050] 5(b), the image generating unit 51 generates an interference information image 92 as interference information 90 indicating the range in the first irradiation field where the top board movement rail 20 interferes, based on irradiation field range information regarding the range of the first irradiation field and component position information regarding the position of the top board movement rail 20. The interference information image 92 is an image that indicates the range in the first irradiation field where the top board movement rail 20 interferes, and is colored, for example, with a translucent color that allows the optical image 40 to be viewed.

[0051] 7(b), the image generation unit 51 generates an interference information image 92 as interference information 90 indicating the range in the first irradiation field where the second X-ray detection unit moving member 21 interferes, based on irradiation field range information on the range of the first irradiation field and member position information on the position of the second X-ray detection unit moving member 21. The interference information image 92 is an image that indicates the range in the first irradiation field where the second X-ray detection unit moving member 21 interferes, and is colored, for example, with a translucent color that allows the optical image 40 to be viewed.

[0052] Note that, because the X-rays irradiated from the X-ray tube 31a of the first X-ray irradiator 31 and passing through the opening formed by the shielding member of the collimator 31b spread while diffusing, the range of the first irradiation field at the height position of the tabletop moving rails 20 differs from the range 99 of the first irradiation field at a predetermined height position from the support surface 10a of the tabletop 10. The image generator 51 generates an interference information image 92 as interference information 90 that indicates the range of interference of the tabletop moving rails 20 in the first irradiation field at the height position of the tabletop moving rails 20 located between the first X-ray irradiator 31 and the first X-ray detector 32. Similarly, the range of the first irradiation field at the height position of the second X-ray detector moving member 21 differs from the range 99 of the first irradiation field at a predetermined height position from the support surface 10a of the tabletop 10. The image generation unit 51 generates an interference information image 92 as interference information 90 indicating the range of interference of the second X-ray detection unit moving member 21 in the first irradiation field at the height position of the second X-ray detection unit moving member 21 located between the first X-ray irradiation unit 31 and the first X-ray detection unit 32.

[0053] 4(b) and 6(b), the image generation unit 51 generates a first superimposed image 91 in which an irradiation field image 93 indicating a range 99 of the first irradiation field at a predetermined height position and an image indicating the position of the tabletop installation member 2 are aligned and superimposed on the optical image 40, and displays the generated first superimposed image 91 on the display unit 60. Furthermore, in a state in which the tabletop installation member 2 interferes in the first irradiation field, the image generation unit 51 generates a first superimposed image 91 in which an irradiation field image 93 indicating a range 99 of the first irradiation field at a predetermined height position, an image indicating the position of the tabletop installation member 2, and an interference information image 92 as interference information 90 indicating the range in which the tabletop installation member 2 interferes in the first irradiation field are aligned and superimposed on the optical image 40, and displays the generated first superimposed image 91 on the display unit 60.

[0054] (Control of display of interference information image by control unit) (Control of display of interference information image related to tabletop moving rails in X-ray or fluoroscopic imaging using the first X-ray imaging unit) 4 and 5, the control of the control unit 5 to display the interference information image 92 relating to the tabletop moving rails 20 in X-ray photography or fluoroscopic photography using the first X-ray photography unit 30 will be described.

[0055] 4 and 5 show an example of control of the display of an interference information image 92 relating to the tabletop moving rails 20 when the first X-ray imaging unit 30 is moved in the Y1 direction during fluoroscopic imaging of the subject 9 lying on the tabletop 10 (supine position). Note that FIGS. 4(a) and 5(a) are views of the tabletop 10 as viewed from the Z1 direction. For ease of explanation, an image 95 showing the position of the second X-ray detection unit moving member 21 is omitted from FIGS. 4(b) and 5(b).

[0056] 4(a) and 5(a), the optical imaging unit 4 captures an optical image 40 of the subject 9 placed on the tabletop 10 and the tabletop unit 1. The image generating unit 51 acquires the optical image 40 captured by the optical imaging unit 4. The image generating unit 51 also acquires irradiation field range information regarding the range of the first irradiation field and component position information regarding the position of the tabletop moving rails 20, both of which are acquired by the position information acquiring unit 50.

[0057] 4(a) is a schematic diagram showing the positional relationship between the subject 9, the first X-ray imaging unit 30, the top 10, and the top movement rails 20 before the first X-ray imaging unit 30 is moved in the Y1 direction. In FIG. 4(a), the top movement rails 20, which are located below the top 10 and therefore cannot be seen by the user, are indicated by dashed lines. FIG. 4(b) is a schematic diagram of a first superimposed image 91 displayed on the display unit 60 before the first X-ray imaging unit 30 is moved in the Y1 direction. In the states of FIGS. 4(a) and 4(b), the top movement rails 20 do not interfere with the first irradiation field.

[0058] In the state shown in FIG. 4(a), the image generating unit 51 acquires a range 99 of the first irradiation field at a predetermined height position from the support surface 10a of the tabletop 10 based on irradiation field range information about the range of the first irradiation field, and generates a frame image showing the range 99 of the first irradiation field at the acquired predetermined height position. The image generating unit 51 also generates a frame image showing the position of the tabletop moving rails 20 based on component position information about the position of the tabletop moving rails 20. The image generating unit 51 does not generate an interference information image 92 because the tabletop moving rails 20 do not interfere in the first irradiation field based on the irradiation field range information about the range of the first irradiation field and the component position information about the position of the tabletop moving rails 20. Then, as shown in FIG. 4(b), the image generating unit 51 displays a first superimposed image 91 on the display unit 60, in which a frame image showing the range of the first irradiation field and a frame image showing the position of the tabletop moving rails 20 are superimposed on the optical image 40.

[0059] FIG. 5(a) is a schematic diagram showing the positional relationship between the subject 9, the first X-ray imaging unit 30, the top 10, and the top movement rails 20 after the first X-ray imaging unit 30 has been moved in the Y1 direction. Also in FIG. 5(a), the top movement rails 20, which are located below the top 10 and therefore cannot be seen by the user, are shown by dashed lines. FIG. 5(b) is a schematic diagram of the first superimposed image 91 displayed on the display unit 60 after the first X-ray imaging unit 30 has been moved in the Y1 direction. In the states of FIGS. 5(a) and 5(b), the top movement rails 20 interfere with the first irradiation field.

[0060] In the state of FIG. 5(a), similar to the state of FIG. 4(a), the image generator 51 generates a frame image showing the range 99 of the first irradiation field at a predetermined height position, and also generates a frame image showing the position of the tabletop movement rail 20. Here, the image generator 51 generates an interference information image 92 because the tabletop movement rail 20 interferes in the first irradiation field, based on irradiation field range information about the range of the first irradiation field and component position information about the position of the tabletop movement rail 20. As an example, the interference information image 92 is an image showing the range of interference of the tabletop movement rail 20 in the first irradiation field, and is colored translucently so that the optical image 40 can be seen. Then, as shown in FIG. 5(b), the image generator 51 displays on the display unit 60 a first superimposed image 91 in which the frame image showing the range of the first irradiation field, the frame image showing the position of the tabletop movement rail 20, and the interference information image 92 are superimposed on the optical image 40.

[0061] (Control of display of interference information image regarding moving member of second X-ray detection unit in X-ray photography or fluoroscopy using first X-ray photography unit) 6 and 7, the control of the control unit 5 to display the interference information image 92 related to the second X-ray detection unit moving member 21 in X-ray imaging or fluoroscopic imaging using the first X-ray imaging unit 30 will be described.

[0062] 6 and 7 show an example of control of the display of an interference information image 92 relating to the second X-ray detection unit moving member 21 when the first X-ray imaging unit 30 is moved in the X1 direction during fluoroscopic imaging of the subject 9 lying on the tabletop 10 (supine position). Note that FIGS. 6(a) and 7(a) are views of the tabletop 10 as viewed from the Z1 direction. For ease of explanation, images 94 showing the position of the tabletop moving rails 20 are omitted from FIGS. 6(b) and 7(b).

[0063] 6(a) and 7(a), the optical imaging unit 4 captures an optical image 40 of the subject 9 placed on the tabletop 10 and the tabletop unit 1. The image generation unit 51 acquires the optical image 40 captured by the optical imaging unit 4. The image generation unit 51 also acquires irradiation field range information regarding the range of the first irradiation field and member position information regarding the position of the second X-ray detection unit moving member 21, both acquired by the position information acquisition unit 50.

[0064] 6(a) is a schematic diagram showing the positional relationship between the subject 9, the first X-ray imaging unit 30, the tabletop 10, and the second X-ray detection unit moving member 21 before the first X-ray imaging unit 30 is moved in the X1 direction. In FIG. 6(a), the second X-ray detection unit moving member 21, which is located below the tabletop 10 and therefore cannot be seen by the user, is shown by a two-dot chain line. FIG. 6(b) is a schematic diagram of the first superimposed image 91 displayed on the display unit 60 before the first X-ray imaging unit 30 is moved in the X1 direction. In the states of FIGS. 6(a) and 6(b), the second X-ray detection unit moving member 21 does not interfere with the first irradiation field.

[0065] In the state shown in FIG. 6( a), the image generator 51 acquires a first irradiation field range 99 at a predetermined height position from the support surface 10a of the tabletop 10 based on irradiation field range information regarding the range of the first irradiation field, and generates a frame image showing the first irradiation field range 99 at the acquired predetermined height position. The image generator 51 also generates a frame image showing the position of the second X-ray detection unit moving member 21 based on component position information regarding the position of the second X-ray detection unit moving member 21. The image generator 51 does not generate an interference information image 92 based on the irradiation field range information regarding the range of the first irradiation field and the component position information regarding the position of the second X-ray detection unit moving member 21 because the second X-ray detection unit moving member 21 does not interfere in the first irradiation field. Then, as shown in FIG. 6( b), the image generator 51 displays a first superimposed image 91 on the display unit 60, in which a frame image showing the range of the first irradiation field and a frame image showing the position of the second X-ray detection unit moving member 21 are superimposed on the optical image 40.

[0066] 7(a) is a schematic diagram showing the positional relationship between the subject 9, the first X-ray imaging unit 30, the tabletop 10, and the second X-ray detection unit moving member 21 after the first X-ray imaging unit 30 has been moved in the X1 direction. Also in FIG. 7(a), the second X-ray detection unit moving member 21, which is located below the tabletop 10 and therefore cannot be seen by the user, is shown by a two-dot chain line. FIG. 7(b) is a schematic diagram of the first superimposed image 91 displayed on the display unit 60 after the first X-ray imaging unit 30 has been moved in the X1 direction. In the states of FIGS. 7(a) and 7(b), the second X-ray detection unit moving member 21 interferes with the first irradiation field.

[0067] In the state of FIG. 7(a), similar to the state of FIG. 6(a), the image generator 51 generates a frame image indicating the range 99 of the first irradiation field at a predetermined height position, and also generates a frame image indicating the position of the second X-ray detection unit moving member 21. Here, the image generator 51 generates an interference information image 92 because the second X-ray detection unit moving member 21 interferes in the first irradiation field, based on irradiation field range information regarding the range of the first irradiation field and member position information regarding the position of the second X-ray detection unit moving member 21. As an example, the interference information image 92 is an image that is given a semitransparent color that allows the optical image 40 to be viewed, and indicates the range in which the second X-ray detection unit moving member 21 interferes in the first irradiation field. Then, as shown in FIG. 7(b), the image generator 51 causes the display unit 60 to display a first superimposed image 91 in which the frame image indicating the range of the first irradiation field, the frame image indicating the position of the second X-ray detection unit moving member 21, and the interference information image 92 are superimposed on the optical image 40.

[0068] (Effects of the first embodiment) In the first embodiment, the following effects can be obtained.

[0069] In the first embodiment, as described above, the control unit 5 controls the notification unit 6 to notify the user that the tabletop installation member 2 is interfering with the first irradiation field, based on irradiation field range information regarding the range of the irradiation field of X-rays irradiated from the first X-ray irradiator 31 and component position information regarding the position of the tabletop installation member 2. As a result, the notification unit 6 notifies the user that the tabletop installation member 2 is interfering with the first irradiation field, allowing the user to recognize that the tabletop installation member 2 is interfering with the first irradiation field. This allows the user to resolve the interference of the tabletop installation member 2 with the first irradiation field. As a result, it is possible to prevent an increase in radiation exposure due to re-taking of X-ray images or an extension of the fluoroscopic imaging time caused by the interference of the tabletop installation member 2 with the first irradiation field.

[0070] Furthermore, in the first embodiment, the following additional effects can be obtained by configuring as follows.

[0071] That is, in the first embodiment, as described above, the top panel installation member 2 includes top panel moving rails 20 provided at both ends of the top panel 1 in the shorter direction and configured to slide the top panel 10 included in the top panel 1 in the longitudinal direction of the top panel 1, and a second X-ray detection unit moving member 21 provided on the top panel 1 and supporting the second X-ray detection unit 35 arranged on the top panel 1 and moving the second X-ray detection unit 35 in the longitudinal direction of the top panel 1, and is configured to include a metal portion with low X-ray transmittance. This allows the user to recognize that the top panel moving rails 20 and the second X-ray detection unit moving member 21, which include a metal portion, are interfering with the first irradiation field, and the user can easily eliminate the interference of the top panel moving rails 20 and the second X-ray detection unit moving member 21 with the first irradiation field. As a result, it is possible to easily suppress the increase in radiation exposure due to the re-taking of X-ray images or the extension of fluoroscopic imaging time caused by interference of the tabletop moving rail 20 and the second X-ray detection unit moving member 21, which contain metal parts, with the first irradiation field.

[0072] Furthermore, in the first embodiment, as described above, the notification unit 6 includes the display unit 60, and the control unit 5 is configured to cause the display unit 60 to display interference information 90 indicating that the tabletop installation member 2 is interfering with the first irradiation field, based on the irradiation field range information and the member position information. As a result, the interference information 90 indicating that the tabletop installation member 2 is interfering with the first irradiation field is displayed on the display unit 60, allowing the user to easily visually recognize that the tabletop installation member 2 is interfering with the first irradiation field.

[0073] Furthermore, as described above, the first embodiment further includes an optical imaging unit 4 that captures an optical image 40 of the subject 9 and the tabletop 1, the display unit 60 is configured to display the optical image 40 captured by the optical imaging unit 4, and the control unit 5 is configured to cause the display unit 60 to display an interference information image 92 as interference information 90 indicating the extent to which the tabletop installation member 2 interferes in the first irradiation field, superimposed on the optical image 40. As a result, the interference information image 92 indicating that the tabletop installation member 2 is interfering with the first irradiation field is displayed on the display unit 60, allowing the user to more easily recognize that the tabletop installation member 2 is interfering with the first irradiation field.

[0074] Furthermore, in the first embodiment, as described above, the X-ray irradiator includes the first X-ray irradiator 31 and the second X-ray irradiator 34, the X-ray detector includes the first X-ray detector 32 and the second X-ray detector 35, and the X-ray imaging unit 3 includes the first X-ray irradiator 31 arranged on the top panel 1 and the first X-ray imaging unit 30 including the first X-ray detector 32 arranged at a position facing the first X-ray irradiator 31 across the top panel 10, the second X-ray detector 35 arranged on the top panel 1, and the X-ray detector 36 arranged on the top panel 1. and a second X-ray imaging unit 33 including a second X-ray irradiator 34 disposed on the opposite side of the second X-ray detector 35 across the top 10, the top installation member 2 being a top moving rail 20, and the control unit 5 being configured to cause the notification unit 6 to notify that the top moving rail 20 is interfering with the first irradiation field based on irradiation field range information regarding the range of the first irradiation field of X-rays irradiated from the first X-ray irradiator 31 and component position information regarding the position of the top moving rail 20. As a result, because the first X-ray irradiator 31 of the first X-ray imaging unit 30 irradiates X-rays onto the subject 9 through the top 10, the user can recognize that the top moving rail 20 is interfering with the first irradiation field even in a configuration in which the irradiation field of the body surface of the subject 9 cannot be confirmed by an irradiation field lamp. Therefore, even in a configuration in which X-rays are irradiated to the subject 9 through the tabletop 10 by the first X-ray irradiation unit 31 of the first X-ray imaging unit 30, it is possible to suppress an increase in the amount of exposure due to re-taking of X-ray images caused by interference of the tabletop moving rail 20 with the first irradiation field or an extension of the fluoroscopic imaging time.

[0075] Furthermore, in the first embodiment, as described above, the X-ray irradiator includes the first X-ray irradiator 31 and the second X-ray irradiator 34, the X-ray detector includes the first X-ray detector 32 and the second X-ray detector 35, and the X-ray imaging unit 3 includes the first X-ray irradiator 31 arranged on the top panel 1 and the first X-ray imaging unit 30 including the first X-ray detector 32 arranged at a position facing the first X-ray irradiator 31 across the top panel 10, the second X-ray detector 35 arranged on the top panel 1 and the second X-ray detector 35 arranged at a position facing the first X-ray irradiator 31 across the top panel 10, and the second X-ray imaging unit 30 including the first X-ray irradiator 31 arranged on the top panel 1 and the second X-ray detector 35 across the top panel 10. The tabletop installation member 2 is a second X-ray detection unit moving member 21 serving as an X-ray detection unit moving member, and the control unit 5 is configured to cause the notification unit 6 to notify that the second X-ray detection unit moving member 21 is interfering with the first irradiation field, based on irradiation field range information regarding the range of the first irradiation field of X-rays irradiated from the first X-ray irradiator 31 and component position information regarding the position of the second X-ray detection unit moving member 21. As a result, because X-rays are irradiated to the subject 9 by the first X-ray irradiator 31 of the first X-ray imaging unit 30 through the tabletop 10, even in a configuration in which the irradiation field on the body surface of the subject 9 cannot be confirmed by an irradiation field lamp, the user can recognize that the second X-ray detection unit moving member 21 is interfering with the first irradiation field. Therefore, even in a configuration in which X-rays are irradiated to the subject 9 through the tabletop 10 by the first X-ray irradiation unit 31 of the first X-ray imaging unit 30, it is possible to suppress an increase in the amount of radiation exposure due to the need to retake X-ray images or an extension of the fluoroscopic imaging time caused by interference of the second X-ray detection unit moving member 21 with the first irradiation field.

[0076] Furthermore, in the first embodiment, as described above, the notification unit 6 is configured to notify that the tabletop installation member 2 is interfering with the first irradiation field based on the irradiation field range information and the member position information at least during fluoroscopic imaging by the first X-ray imaging unit 30. As a result, by having the notification unit 6 notify that the tabletop installation member 2 is interfering with the first irradiation field at least during fluoroscopic imaging, it is possible to easily suppress an increase in the amount of radiation exposure due to an extension of the fluoroscopic imaging time caused by the tabletop installation member 2 interfering with the first irradiation field.

[0077] [Second embodiment] A second embodiment will be described with reference to Fig. 8. In this second embodiment, unlike the first embodiment in which the notification unit 6 includes a display unit 60 and the control unit 5 is configured to cause the display unit 60 to display a first superimposed image 91 in which an interference information image 92 is superimposed on an optical image 40, an example will be described in which the notification unit 6 includes a speaker 61 and the control unit 5 is configured to cause the speaker 61 to notify that the tabletop installation member 2 is interfering with the X-ray irradiation field. Note that the same components as those in the first embodiment are denoted by the same reference numerals, and their description will be omitted.

[0078] (Configuration of X-ray equipment) The configuration of the X-ray imaging apparatus 110 according to this embodiment will be described.

[0079] The notification unit 6 includes a speaker 61. The speaker 61 is configured to notify that the tabletop installation member 2 is interfering with the first irradiation field under the control of the control unit 5. Specifically, the speaker 61 is configured to notify that the tabletop installation member 2 is interfering with the first irradiation field by outputting an alarm sound.

[0080] The control unit 5 is configured to make the speaker 61 notify the user that the tabletop installation member 2 is interfering with the X-ray irradiation field based on the irradiation field range information and the member position information.

[0081] (Each functional block of the control unit) The functional blocks included in the control unit 5 will be described. The control unit 5, which is made up of hardware such as a CPU, includes, as software (program) functional blocks, a position information acquisition unit 50, an image generation unit 51, and a notification control unit 52. The control unit 5 executes a program stored in a storage unit (not shown) to function as the position information acquisition unit 50, the image generation unit 51, and the notification control unit 52. The position information acquisition unit 50, the image generation unit 51, and the notification control unit 52 may be configured individually by hardware using dedicated processors (processing circuits). Note that the position information acquisition unit 50 has the same configuration as the position information acquisition unit 50 in the first embodiment, and therefore description thereof will be omitted here.

[0082] The image generation unit 51 is configured to display, on the display unit 60 of the notification unit 6, an irradiation field superimposed image in which an irradiation field image 93 (see FIG. 4(a)) indicating the range 99 of the first irradiation field at a predetermined height position is superimposed on an optical image 40 (see FIG. 4(a)) captured by the optical imaging unit 4, when the user selects X-ray photography or fluoroscopy using the first X-ray photography unit 30. The image generation unit 51 acquires the optical image 40 captured by the optical imaging unit 4, when the user selects X-ray photography or fluoroscopy using the first X-ray photography unit 30.

[0083] The image generating unit 51 is configured to acquire a range 99 of the first irradiation field at a predetermined height position from the support surface 10a of the tabletop 10 based on irradiation field range information relating to the range of the first irradiation field, and to generate an irradiation field image 93 showing the range 99 of the first irradiation field at the acquired predetermined height position. The irradiation field image 93 showing the range 99 of the first irradiation field at the predetermined height position is the same as in the first embodiment, and therefore will not be described here.

[0084] The image generating unit 51 generates an irradiation field superimposed image in which an irradiation field image 93 indicating the range 99 of the first irradiation field at a predetermined height position is aligned with and superimposed on the optical image 40, and displays the generated irradiation field superimposed image on the display unit 60. That is, in the second embodiment, the image generating unit 51 does not generate an interference information image 92 as interference information 90 indicating the range in which the tabletop installation member 2 interferes in the first irradiation field.

[0085] When the user selects X-ray photography or fluoroscopic photography using the first X-ray photography unit 30, the notification control unit 52 is configured to acquire irradiation field range information regarding the range of the first irradiation field of X-rays irradiated from the first X-ray irradiator 31 and component position information regarding the position of the tabletop installation component 2. Furthermore, the notification control unit 52 is configured to control the speaker 61 to notify that the tabletop installation component 2 is interfering with the first irradiation field, based on the acquired irradiation field range information and component position information.

[0086] The notification control unit 52 acquires irradiation field range information regarding the range of the first irradiation field and component position information regarding the position of the top moving rails 20 and the position of the second X-ray detection unit moving member 21 from the position information acquisition unit 50. Furthermore, the notification control unit 52 causes the speaker 61 to notify that the top moving rails 20 are interfering in the first irradiation field, based on the acquired irradiation field range information regarding the range of the first irradiation field and component position information regarding the position of the top moving rails 20. Furthermore, the notification control unit 52 causes the speaker 61 to notify that the second X-ray detection unit moving member 21 is interfering in the first irradiation field, based on the acquired irradiation field range information regarding the range of the first irradiation field and component position information regarding the position of the second X-ray detection unit moving member 21.

[0087] The notification control unit 52 is configured to issue a notification by outputting a notification sound from the speaker 61. That is, the notification control unit 52 is configured to issue a notification that the tabletop installation member 2 is interfering with the first irradiation field by outputting a notification sound from the speaker 61. The notification sound may be a warning sound or a voice warning message. As the voice warning message, for example, information indicating that the tabletop installation member 2 is interfering with the first irradiation field, such as "The tabletop movement rails 20 are reflected in the irradiation field," may be output, or information urging the user to move the first X-ray imaging unit 30 or the tabletop 10, such as "The tabletop movement rails 20 are interfering with the irradiation field. Please move the first X-ray imaging unit 30 in the XX direction of the tabletop 10," may be output.

[0088] The other configurations of the second embodiment are the same as those of the first embodiment.

[0089] (Effects of the second embodiment) In the second embodiment, the following effects can be obtained.

[0090] In the second embodiment, as described above, the notification unit 6 includes the speaker 61, and the control unit 5 is configured to cause the speaker 61 to notify that the tabletop installation member 2 is interfering with the irradiation field based on the irradiation field range information and the member position information. As a result, the speaker 61 notifies that the tabletop installation member 2 is interfering with the first irradiation field, so that the user can easily recognize audibly that the tabletop installation member 2 is interfering with the first irradiation field.

[0091] The other effects of the second embodiment are the same as those of the first embodiment.

[0092] [Third embodiment] A third embodiment will be described with reference to Figures 9 and 10. In this third embodiment, unlike the second embodiment in which the first X-ray imaging unit 30 includes a first X-ray irradiator 31 arranged on the tabletop 1 and a first X-ray detector 32 arranged at a position opposite the first X-ray irradiator 31 across the tabletop 10, and the operation unit 7 is provided near the first X-ray detector 32, a third X-ray imaging unit 36 ​​includes a third X-ray detector 38 arranged on the tabletop 1 and a third X-ray irradiator 37 arranged on the opposite side of the tabletop 10 from the third X-ray detector 38, and an X-ray imaging device 120 is arranged in an imaging room 70, and the operation unit 7 is provided in an operation room 71 adjacent to the imaging room 70. Note that the same components as those in the second embodiment are denoted by the same reference numerals, and their description will be omitted.

[0093] (Configuration of X-ray equipment) The configuration of the X-ray imaging apparatus 120 according to this embodiment will be described.

[0094] As shown in FIG. 9, the X-ray imaging device 120 includes a tabletop unit 1, a tabletop installation member 2, a third X-ray imaging unit 36, a control unit 5 (see FIG. 10), a notification unit 6, and an operation unit 7. In the X-ray imaging device 120, the tabletop unit 1 and the third X-ray imaging unit 36 ​​are disposed in an imaging room 70, and the notification unit 6 and the operation unit 7 are disposed in an operation room 71 adjacent to the imaging room 70. In this embodiment, the X-ray imaging device 120 is a so-called remote-controlled X-ray imaging device. Note that in this embodiment, an optical imaging unit 4 is not provided. Here, the remote-controlled X-ray imaging device is an X-ray imaging device in which the imaging room 70 and the operation room 71 are provided separately, and a user can perform fluoroscopic imaging and the like using the operation unit 7 in the operation room 71.

[0095] The top plate unit 1 includes a base 12, a third support column 18 provided on the base 12, a holder 14 provided so as to be movable up and down relative to the third support column 18, and a top plate 10 rotatably connected to the holder 14. The holder 14 moves up and down in the Z direction.

[0096] The tabletop unit installation member 2 includes tabletop movement rails 20. The tabletop movement rails 20 are provided at both ends of the tabletop unit 1 in the short direction. The tabletop movement rails 20 are provided below the tabletop 10. The tabletop movement rails 20 are configured to engage with engagement portions provided on the surface of the tabletop 10 opposite the placement surface 10a, and to slide the tabletop 10 in the longitudinal direction (X direction) of the tabletop unit 1. The tabletop movement rails 20 are made of a metal material. The tabletop 10 is configured to slide in the longitudinal direction (X direction) of the tabletop unit 1 via the tabletop movement rails 20 by the first tabletop driving unit 84. The tabletop 10 is configured to be movable relative to the third X-ray imaging unit 36.

[0097] The third X-ray imaging unit 36 ​​includes a third X-ray irradiator 37, a third X-ray detector 38, and a fourth support column 19. The third X-ray irradiator 37 is supported by the fourth support column 19. The third X-ray detector 38 is disposed on the opposite side (Z2 side) of the tabletop 10 from the support surface 10a. The fourth support column 19 including the third X-ray irradiator 37 and the third X-ray detector 38 move back and forth in synchronization with each other in the longitudinal direction of the tabletop 10. The third X-ray imaging unit 36 ​​is configured to be movable relative to the tabletop 10. The third X-ray imaging unit 36, the third X-ray irradiator 37, and the third X-ray detector 38 are examples of the "X-ray imaging unit," "X-ray irradiator," and "X-ray detector" in the claims, respectively.

[0098] The third X-ray detection unit moving member 24 carries the third X-ray detection unit 38 arranged on the top panel 1. The third X-ray detection unit moving member 24 is configured to move together with the carried third X-ray detection unit 38 in the longitudinal direction (X direction) of the top panel 1 below the top panel 10. The third X-ray detection unit moving member 24 is moved in the longitudinal direction (X direction) of the top panel 1 by a third X-ray detection unit driving unit 89.

[0099] As in the second embodiment, the notification unit 6 includes a speaker 61. The speaker 61 is configured to notify the user that the top moving rails 20 are interfering with the third irradiation field under the control of the control unit 5. Specifically, the speaker 61 is configured to notify the user that the top moving rails 20 are interfering with the third irradiation field by outputting an alarm sound. Furthermore, the control unit 5 is configured to cause the speaker 61 to notify the user that the top moving rails 20 are interfering with the third irradiation field based on the irradiation field range information and component position information.

[0100] The other configurations of the third embodiment are the same as those of the second embodiment.

[0101] (Effects of the third embodiment) In the third embodiment, the same effects as in the second embodiment can be obtained.

[0102] [Fourth embodiment] A fourth embodiment will be described with reference to Figures 11 to 15. In this fourth embodiment, unlike the first embodiment in which the control unit 5 superimposes an interference information image 92 as interference information 90 on the optical image 40 in the first irradiation field and displays it on the display unit 60, an example will be described in which the control unit 5 superimposes an interference information image 192 as interference information 90 on an irradiation field image 193 including an X-ray image and displays it on the display unit 60. Note that the same components as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted.

[0103] (overview) In the X-ray imaging device 140, when fluoroscopic imaging is performed on a region (region of interest) of a subject 9 placed on the tabletop 10 and then on a different region of interest, the X-ray irradiation field may be positioned by moving the tabletop 10 or the X-ray imaging unit 3 after X-ray irradiation is stopped in the X-ray imaging unit 3. The X-ray irradiation field is positioned by using an LIH (last image hold) image 98 displayed on the display unit 60 to match the X-ray irradiation field on the subject 9 with the region of interest. The LIH image 98 is the final frame of fluoroscopic images collected by fluoroscopic imaging, and is usually continuously displayed on the display unit 60 even after fluoroscopic imaging is performed.

[0104] Here, the image displayed on the entire display unit 60, including the LIH image 98, can be said to indicate the range of the X-ray irradiation field when X-rays are irradiated at that time. Therefore, the positioning of the X-ray irradiation field is performed by the user moving the tabletop 10 or the X-ray imaging unit 3 by operating the operation unit 7 while viewing the LIH image 98 displayed on the display unit 60. When the tabletop 10 or the X-ray imaging unit 3 is moved, the control unit 5 moves the display position of the LIH image 98 displayed on the display unit 60 in accordance with the direction and distance of movement of the tabletop 10 or the direction and distance of movement of the X-ray imaging unit 3. In other words, the control unit 5 moves the LIH image 98 on the display unit 60 so as to follow the movement of the tabletop 10 or the X-ray imaging unit 3. At this time, depending on the direction and distance of movement of the tabletop 10 or the X-ray imaging unit 3 and the dimensions of the opening of the collimator 31b, the moved LIH image 98 on the display unit 60 may not be displayed in its entirety, but only a portion of it.

[0105] When it is determined that the X-ray irradiation field and the region of interest match based on the image on the display unit 60, including the LIH image 98, the positioning of the X-ray irradiation field is completed. Then, fluoroscopic imaging is started by irradiating X-rays from the X-ray irradiation unit. However, after the X-ray irradiation field is positioned using the LIH image 98 displayed on the display unit 60, there is a possibility that the top board installation member 2 is interfering with the range of the X-ray irradiation field. Therefore, by making the user aware that the top board installation member 2 is interfering with the X-ray irradiation field, an increase in exposure dose due to retaking of X-ray images or an extension of the fluoroscopic imaging time caused by the interference of the top board installation member 2 with the X-ray irradiation field is suppressed.

[0106] (Configuration of X-ray equipment) The configuration of an X-ray imaging apparatus 140 according to this embodiment will be described with reference to FIGS.

[0107] The display unit 60 is configured to display an irradiation field image 193 that includes an X-ray image based on the detection signal detected by the first X-ray detection unit 32 and indicates the range of the irradiation field. Specifically, when the user selects fluoroscopic imaging using the first X-ray imaging unit 30, the display unit 60 is configured to display an irradiation field image 193 that indicates the range of the irradiation field and includes an LIH image 98 based on the detection signal detected by the first X-ray detection unit 32. The LIH image 98 is an example of an "X-ray image" in the claims.

[0108] In the case where the user has selected fluoroscopic imaging using the first X-ray imaging unit 30, the display unit 60 continues to display the LIH image 98 after the fluoroscopic imaging is performed.

[0109] As shown in Fig. 12(b), after the fluoroscopic imaging is performed, the control unit 5 causes the display unit 60 to continue displaying the LIH image 98. Furthermore, as shown in Fig. 13(b), the control unit 5 is configured to cause the display unit 60 to display an interference information image 192 as interference information 90 indicating the range of interference of the tabletop installation member 2 in the first irradiation field, superimposed on an irradiation field image 193 including an X-ray image. Specifically, when the user has selected fluoroscopic imaging using the first X-ray imaging unit 30, the control unit 5 causes the display unit 60 to display the interference information image 192 as interference information 90 indicating the range of interference of the tabletop installation member 2 in the first irradiation field, superimposed on an irradiation field image 193 including an LIH image 98, after the fluoroscopic imaging is performed.

[0110] (Each functional block of the control unit) The functional blocks included in the control unit 5 will be described. The control unit 5, which is made up of hardware such as a CPU, includes a position information acquisition unit 50 and an image generation unit 51 as software (program) functional blocks. The control unit 5 functions as the position information acquisition unit 50 and the image generation unit 51 by executing a program stored in a storage unit (not shown). The position information acquisition unit 50 and the image generation unit 51 may be configured separately by hardware with dedicated processors (processing circuits). Note that the position information acquisition unit 50 has the same configuration as the position information acquisition unit 50 in the first embodiment, and therefore description thereof will be omitted here.

[0111] (Image generation section) The image generating unit 51 is configured to generate an X-ray image based on a detection signal output from the first X-ray detecting unit 32. Specifically, when the user selects fluoroscopic imaging using the first X-ray imaging unit 30, the image generating unit 51 generates an X-ray image (moving image) of the imaging region based on the detection signal output from the first X-ray detecting unit 32. After the fluoroscopic imaging is performed, the image generating unit 51 causes the display unit 60 to continue displaying the LIH image 98.

[0112] The image generating unit 51 is also configured to display an irradiation field image 193 indicating the range of the irradiation field on the display unit 60. The irradiation field image 193 is an image indicating the range 99 of the first irradiation field at a predetermined height position from the support surface 10a of the tabletop 10. The irradiation field image 193 includes an LIH image 98 located in the range 99 of the first irradiation field.

[0113] The image generating unit 51 acquires the range 99 of the first irradiation field based on irradiation field range information relating to the range 99 of the first irradiation field at the current time. Furthermore, the image generating unit 51 acquires the range 199 of the first irradiation field at the time of generating the LIH image 98 based on the irradiation field range information at the time of generating the LIH image 98. Then, the image generating unit 51 generates an irradiation field image 193 in which the LIH image 98 is placed at a position in the range 99 of the first irradiation field at the current time that corresponds to the position in the range 199 of the first irradiation field at the time of image generation. In the irradiation field image 193 displayed on the display unit 60, the image generating unit 51 displays a portion 900 (see FIGS. 13(b) and 15(b)) outside the range of the LIH image 98 as blacked out.

[0114] After fluoroscopic imaging is performed and before the tabletop 10 or the first X-ray imaging unit 30 is moved, the range 199 of the first irradiation field at the time of image generation is the same as the range 99 of the first irradiation field at the current time. Therefore, after fluoroscopic imaging is performed and before the tabletop 10 or the first X-ray imaging unit 30 is moved, the LIH image 98 is displayed on the display unit 60 as the irradiation field image 193.

[0115] Furthermore, when the tabletop 10 or the first X-ray imaging unit 30 is moved after fluoroscopic imaging is performed, the image generation unit 51 moves the position of the LIH image 98 in the irradiation field image 193 in accordance with the direction and distance of movement of the tabletop 10 or the direction and distance of movement of the first X-ray imaging unit 30. That is, the image generation unit 51 moves the LIH image 98 in the irradiation field image 193 to follow the movement of the tabletop 10 or the first X-ray imaging unit 30 based on the current range 99 of the first irradiation field and the range 199 of the first irradiation field at the time of image generation. At this time, depending on the direction and distance of movement of the tabletop 10 or the first X-ray imaging unit 30 and the dimensions of the opening of the collimator 31b, the moved LIH image 98 is not displayed in its entirety in the display area of ​​the display unit 60, but only a part of it.

[0116] Here, when the tabletop 10 or the first X-ray imaging unit 30 is moved after fluoroscopic imaging is performed, the image generation unit 51 moves the position of the irradiation field image 193 indicating the current range 99 of the first irradiation field in accordance with the direction and distance of movement of the tabletop 10 or the direction and distance of movement of the first X-ray imaging unit 30. In other words, the image generation unit 51 is configured to move the irradiation field image 193 indicating the current range 99 of the first irradiation field on the LIH image 98 on the display unit 60 in accordance with at least one of the movement of the first X-ray imaging unit 30 via the second support column driver 87 and the movement of the tabletop 10 via the first top driver 84 and the second top driver 85. The second support column driver 87, the first top driver 84, and the second top driver 85 are examples of the "driver" in the claims.

[0117] 10 to 13, when the user selects fluoroscopic imaging using the first X-ray imaging unit 30, after the fluoroscopic imaging is performed, the image generation unit 51 is configured to superimpose an interference information image 192 on an irradiation field image 193 including an LIH image 98 and display the superimposed image on the display unit 60. That is, the image generation unit 51 is configured to notify the user that the tabletop installation member 2 is interfering with the first irradiation field by displaying on the display unit 60 the irradiation field image 193 on which the interference information image 192 as interference information 90 is superimposed.

[0118] Specifically, as shown in Figures 13(b) and 15(b), the image generation unit 51 is configured to generate an interference information image 192 as interference information 90 indicating the range in which the tabletop installation member 2 interferes in the first irradiation field based on irradiation field range information and member position information regarding the range of the first irradiation field.

[0119] 13(b), the image generating unit 51 generates an interference information image 192 as interference information 90 indicating the range of interference of the top board movement rail 20 in the first irradiation field, based on irradiation field range information regarding the range of the first irradiation field and component position information regarding the position of the top board movement rail 20. The interference information image 192 is, for example, an image in which a visible color is applied to the range of interference of the top board movement rail 20 in the first irradiation field. Note that the display form of the interference information image 192 is not particularly limited, and the interference information image 192 may be, for example, a frame image indicating the outer edge of the range of interference of the top board movement rail 20 in the first irradiation field.

[0120] 15(b), the image generating unit 51 generates an interference information image 192 as interference information 90 indicating the range of interference of the second X-ray detection unit moving member 21 in the first irradiation field, based on irradiation field range information regarding the range of the first irradiation field and member position information regarding the position of the second X-ray detection unit moving member 21. The interference information image 192 is, for example, an image in which a visible color is applied to the range of interference of the second X-ray detection unit moving member 21 in the first irradiation field. Note that the display form of the interference information image 192 is not particularly limited, and the interference information image 192 may be, for example, a frame image indicating the outer edge of the range of interference of the second X-ray detection unit moving member 21 in the first irradiation field.

[0121] 12(b) and 14(b), the image generating unit 51 generates an irradiation field image 193 including the LIH image 98, and displays the generated irradiation field image 193 on the display unit 60. Furthermore, when the tabletop installation member 2 interferes in the first irradiation field, the image generating unit 51 generates an irradiation field image 193 including the LIH image 98, on which an interference information image 192 serving as interference information 90 indicating the range of interference of the tabletop installation member 2 in the first irradiation field is aligned and superimposed, as shown in FIGS.

[0122] (Control of display of interference information image by control unit) (Control of display of interference information image related to tabletop moving rails in fluoroscopic imaging using the first X-ray imaging unit) 12 and 13, the control of the control unit 5 to display the interference information image 192 relating to the tabletop moving rails 20 in fluoroscopic imaging using the first X-ray imaging unit 30 will be described.

[0123] 12 and 13 show an example of control of the display of an interference information image 192 relating to the tabletop moving rails 20 when, after fluoroscopic imaging of the subject 9 lying on the tabletop 10 (supine position), the first X-ray imaging unit 30 is moved in the Y1 direction to search for a region of interest. Note that FIGS. 12(a) and 13(a) are views of the tabletop 10 as viewed from the Z1 direction. In addition, in FIGS. 12 and 13, no X-rays are irradiated from the first X-ray irradiator 31.

[0124] FIG. 12(a) is a schematic diagram showing the positional relationship between the subject 9, the first X-ray imaging unit 30, the top 10, and the top movement rails 20 before the first X-ray imaging unit 30 is moved in the Y1 direction after fluoroscopic imaging. In FIG. 12(a), the top movement rails 20, which are located below the top 10 and therefore cannot be seen by the user, are indicated by dashed lines. FIG. 12(b) is a schematic diagram of an irradiation field image 193 displayed on the display unit 60 before the first X-ray imaging unit 30 is moved in the Y1 direction after fluoroscopic imaging. In this case, the irradiation field image 193 is an LIH image 98. In the states shown in FIGS. 12(a) and 12(b), the top movement rails 20 do not interfere with the first irradiation field.

[0125] 12(a), the image generating unit 51 acquires the range 99 of the first irradiation field based on irradiation field range information relating to the range of the first irradiation field at the current time. Furthermore, the image generating unit 51 acquires the range 199 of the first irradiation field at the time of generating the LIH image 98 based on the irradiation field range information at the time of generating the LIH image 98. Then, the image generating unit 51 generates an irradiation field image 193 in which the LIH image 98 is arranged at a position in the range 99 of the first irradiation field at the current time, which corresponds to the position in the range 199 of the first irradiation field at the time of image generation. Then, as shown in FIG. 12(b), the image generating unit 51 causes the display unit 60 to display the irradiation field image 193 in which the LIH image 98 is arranged.

[0126] FIG. 13(a) is a schematic diagram showing the positional relationship between the subject 9, the first X-ray imaging unit 30, the top 10, and the top movement rails 20 after the first X-ray imaging unit 30 has been moved in the Y1 direction. Note that in FIG. 13(a) as well, the top movement rails 20, which are located below the top 10 and therefore not visible to the user, are indicated by dashed lines. FIG. 13(b) is a schematic diagram of an irradiation field image 193 displayed on the display unit 60 after the first X-ray imaging unit 30 has been moved in the Y1 direction. As shown in FIG. 13(b), the irradiation field image 193 showing the current range 99 of the first irradiation field on the display unit 60 moves on the LIH image 98 in response to the movement of the first X-ray imaging unit 30. Note that in the states of FIGS. 13(a) and 13(b), the top movement rails 20 interfere with the first irradiation field.

[0127] 13(a), similar to the state of FIG. 12(a), the image generator 51 generates an irradiation field image 193 in which the LIH image 98 is positioned at a position in the current first irradiation field range 99 corresponding to the position in the first irradiation field range 199 at the time of image generation. Here, the image generator 51 generates an interference information image 192 because the top plate movement rails 20 interfere in the first irradiation field based on irradiation field range information related to the first irradiation field range 99 and component position information related to the position of the top plate movement rails 20. As an example, the interference information image 192 is an image in which a visible color is applied to the range in the first irradiation field where the top plate movement rails 20 interfere. Then, as shown in FIG. 13(b), the image generator 51 displays on the display unit 60 an irradiation field image 193 including the LIH image 98, with the interference information image 192 aligned and superimposed.

[0128] 13(a), when the first X-ray imaging unit 30 is further moved in the Y1 direction, an irradiation field image 193 in which the interference information image 192 is superimposed on the LIH image 98 is displayed on the display unit 60.

[0129] (Control of display of interference information image regarding moving member of second X-ray detection unit in fluoroscopic imaging using first X-ray imaging unit) 14 and 15, the control of the control unit 5 to display the interference information image 192 related to the second X-ray detection unit moving member 21 in fluoroscopic imaging using the first X-ray imaging unit 30 will be described.

[0130] 14 and 15 show an example of control of the display of an interference information image 192 related to the second X-ray detection unit moving member 21 when the first X-ray imaging unit 30 is moved in the X1 direction after fluoroscopic imaging is performed with the subject 9 lying on the tabletop 10 (supine position). Note that Fig. 14(a) and Fig. 15(a) are views of the tabletop 10 viewed from the Z1 direction. In Fig. 14 and Fig. 15, no X-rays are irradiated from the first X-ray irradiator 31.

[0131] FIG. 14(a) is a schematic diagram showing the positional relationship between the subject 9, the first X-ray imaging unit 30, the tabletop 10, and the second X-ray detection unit moving member 21 before the first X-ray imaging unit 30 is moved in the X1 direction after fluoroscopic imaging. In FIG. 14(a), the second X-ray detection unit moving member 21, which is located below the tabletop 10 and therefore cannot be seen by the user, is indicated by a two-dot chain line. FIG. 14(b) is a schematic diagram of an irradiation field image 193 displayed on the display unit 60 before the first X-ray imaging unit 30 is moved in the X1 direction after fluoroscopic imaging. In this case, the irradiation field image 193 is an LIH image 98. In the states shown in FIGS. 14(a) and 14(b), the second X-ray detection unit moving member 21 does not interfere with the first irradiation field.

[0132] 14(a), the image generating unit 51 acquires the range 99 of the first irradiation field based on irradiation field range information relating to the range 99 of the first irradiation field at the current time. The image generating unit 51 also acquires the range 199 of the first irradiation field at the time of generating the LIH image 98 based on the irradiation field range information at the time of generating the LIH image 98. The image generating unit 51 then generates an irradiation field image 193 in which the LIH image 98 is arranged at a position in the range 99 of the first irradiation field at the current time, which corresponds to the position in the range 199 of the first irradiation field at the time of image generation. Then, as shown in FIG. 14(b), the image generating unit 51 causes the display unit 60 to display the irradiation field image 193 in which the LIH image 98 is arranged.

[0133] FIG. 15(a) is a schematic diagram showing the positional relationship between the subject 9, the first X-ray imaging unit 30, the tabletop 10, and the second X-ray detection unit moving member 21 after the first X-ray imaging unit 30 has been moved in the X1 direction. Note that in FIG. 15(a), the second X-ray detection unit moving member 21, which is located below the tabletop 10 and therefore cannot be seen by the user, is also shown by a two-dot chain line. FIG. 15(b) is a schematic diagram of an irradiation field image 193 displayed on the display unit 60 after the first X-ray imaging unit 30 has been moved in the X1 direction. As shown in FIG. 15(b), the irradiation field image 193 showing the current range 99 of the first irradiation field on the display unit 60 moves on the LIH image 98 in response to the movement of the first X-ray imaging unit 30. Note that in the states of FIGS. 15(a) and 15(b), the second X-ray detection unit moving member 21 interferes with the first irradiation field.

[0134] 15(a), similarly to the state of FIG. 14(a), the image generator 51 generates an irradiation field image 193 in which the LIH image 98 is positioned at a position in the current first irradiation field range 99 corresponding to the position in the first irradiation field range 199 at the time of image generation. Here, the image generator 51 generates an interference information image 192 because the second X-ray detection unit moving member 21 interferes in the first irradiation field, based on irradiation field range information regarding the first irradiation field range 99 and member position information regarding the position of the second X-ray detection unit moving member 21. As an example, the interference information image 192 is an image in which a visible color is applied to the range in the first irradiation field where the second X-ray detection unit moving member 21 interferes. Then, as shown in FIG. 15(b), the image generator 51 causes the display unit 60 to display an irradiation field image 193 including the LIH image 98, with the interference information image 192 aligned and superimposed thereon.

[0135] 15(a), when the first X-ray imaging unit 30 is further moved in the X1 direction, an irradiation field image 193 in which the interference information image 192 is superimposed on the LIH image 98 is displayed on the display unit 60.

[0136] In this embodiment, when the user selects X-ray imaging using the first X-ray imaging unit 30, the control unit 5 may be configured to superimpose an interference information image 192 as interference information 90 in the first irradiation field on an irradiation field image 193 including a final X-ray image and display the superimposed image on the display unit 60 after the X-ray imaging is performed. The final X-ray image refers to the X-ray image generated last in the X-ray imaging. When the user selects X-ray imaging using the first X-ray imaging unit 30, the display unit 60 continues to display the final X-ray image, which is the X-ray image generated last, after the X-ray imaging is performed. In this case, the display unit 60 continues to display the final X-ray image after the X-ray imaging is performed. The final X-ray image is an example of an "X-ray image" in the claims.

[0137] The other configurations of the fourth embodiment are the same as those of the first embodiment.

[0138] (Effects of the fourth embodiment) In the fourth embodiment, the following effects can be obtained.

[0139] In the fourth embodiment, as described above, the display unit 60 is configured to display an irradiation field image 193 that includes an X-ray image based on a detection signal detected by the X-ray detection unit and indicates the range of the irradiation field, and the control unit 5 is configured to cause the display unit 60 to display an interference information image 192 as interference information 90 that indicates the range of interference of the tabletop installation member 2 in the first irradiation field, superimposed on the irradiation field image 193 that includes the LIH image 98. As a result, even if the tabletop installation member 2 interferes with the range of the X-ray irradiation field after the X-ray irradiation field has been positioned using the LIH image 98 displayed on the display unit 60, the interference information image 192 indicating that the tabletop installation member 2 is interfering with the first irradiation field is displayed on the display unit 60, allowing the user to more easily recognize that the tabletop installation member 2 is interfering with the first irradiation field.

[0140] Furthermore, as described above, the fourth embodiment further includes the second support column driver 87, the first top driver 84, and the second top driver 85 that move at least one of the first X-ray imaging unit 30 and the top 10, and the control unit 5 is configured to move the irradiation field image 193 indicating the range 99 of the first irradiation field on the X-ray image on the display unit 60 in accordance with the movement of at least one of the first X-ray imaging unit 30 and the top 10 by the second support column driver 87, the first top driver 84, and the second top driver 85. As a result, the irradiation field image 193 indicating the range 99 of the first irradiation field on the display unit 60 moves on the X-ray image so as to follow the movement of the first X-ray imaging unit 30 or the top 10. This makes it possible to easily position the X-ray irradiation field after X-ray irradiation in the first X-ray imaging unit 30 has stopped, and also to suppress an increase in the amount of radiation exposure when positioning the X-ray irradiation field.

[0141] The other effects of the fourth embodiment are the same as those of the first embodiment.

[0142] [Variations] The embodiments disclosed herein should be considered to be illustrative and not restrictive in all respects. The scope of the present invention is defined by the claims rather than the description of the above embodiments, and further includes all modifications (variations) within the meaning and scope of the claims.

[0143] For example, in the first embodiment described above, an example was shown in which the optical imaging unit 4 was provided in the first X-ray detection unit 32 of the first X-ray imaging unit 30, but not in the second X-ray imaging unit 33, but the present invention is not limited to this. For example, as in an X-ray imaging device 130 of a first modified example shown in FIGS. 16 to 18, the optical imaging unit 4 (see FIG. 16) may be configured to be provided in the second X-ray irradiation unit 34 of the second X-ray imaging unit 33.

[0144] 17 , the control unit 5 is configured to cause the notification unit 6 to notify that the tabletop moving rails 20 are interfering with the second irradiation field, based on irradiation field range information on the range 97 of the second irradiation field of X-rays irradiated from the second X-ray irradiator 34 and component position information on the position of the tabletop moving rails 20. Note that the range 97 of the second irradiation field includes the range of the irradiation field of X-rays when actually irradiated from the second X-ray irradiator 34 and the range of the irradiation field of X-rays when irradiated from the second X-ray irradiator 34.

[0145] The position information acquisition unit 50 is configured to acquire irradiation field range information regarding the range 97 of the second irradiation field and component position information regarding the position of the tabletop moving rail 20 when the user selects X-ray photography or fluoroscopic photography using the second X-ray photography unit 33.

[0146] Furthermore, when the user selects X-ray photography or fluoroscopic photography using the second X-ray photography unit 33, the image generation unit 51 is configured to generate a second superimposed image 96 (see FIG. 18 ) and display the generated second superimposed image 96 on the display unit 60 of the notification unit 6. The second superimposed image 96 is an image in which an image 94 indicating the position of the top board moving rails 20 as the top board installation member 2 and an interference information image 92 as the interference information 90 indicating the range in which the top board moving rails 20 interfere in the second irradiation field are superimposed on the optical image 40 captured by the optical imaging unit 4.

[0147] When the user selects X-ray photography or fluoroscopic photography using the second X-ray photography unit 33, the image generation unit 51 acquires the optical image 40 captured by the optical imaging unit 4. Note that the image generation unit 51 does not generate an image showing the range 97 of the second irradiation field because the range 97 of the second irradiation field is represented in the optical image 40 by visible light irradiated from the irradiation field lamp. The image generation unit 51 generates an image 94 showing the position of the top plate movement rails 20 based on component position information related to the position of the top plate movement rails 20. The image 94 showing the position of the top plate movement rails 20 is, for example, a frame image showing the outer edge of the top plate movement rails 20.

[0148] In addition, the image generation unit 51 is configured to generate an interference information image 92 as interference information 90 indicating the range in which the tabletop moving rail 20 interferes in the second irradiation field based on irradiation field range information regarding the range 97 of the second irradiation field and component position information regarding the position of the tabletop moving rail 20.

[0149] The image generation unit 51 generates a second superimposed image 96 in which an image 94 indicating the position of the top board movement rails 20 is superimposed on the optical image 40, and displays the generated second superimposed image 96 on the display unit 60. Furthermore, when the top board installation member 2 is interfering in the second irradiation field, the image generation unit 51 generates a second superimposed image 96 in which an image 94 indicating the position of the top board movement rails 20 and an interference information image 92 as interference information 90 indicating the range of interference of the top board movement rails 20 in the second irradiation field are superimposed on the optical image 40, and displays the generated second superimposed image 96 on the display unit 60.

[0150] The other configurations of the first modified example are the same as those of the first embodiment.

[0151] In the first modified example, as described above, the X-ray irradiator includes the first X-ray irradiator 31 and the second X-ray irradiator 34, the X-ray detector includes the first X-ray detector 32 and the second X-ray detector 35, and the X-ray imaging unit 3 includes the first X-ray irradiator 31 arranged on the top panel 1 and the first X-ray imaging unit 30 including the first X-ray detector 32 arranged at a position facing the first X-ray irradiator 31 across the top panel 10, the second X-ray detector 35 arranged on the top panel 1, and the X-ray detector 36 arranged at a position facing the top panel 10. and a second X-ray imaging unit 33 including a second X-ray irradiator 34 disposed on the opposite side of the second X-ray detector 35, and the top installation member 2 is a top moving rail 20, and the control unit 5 is configured to cause the notification unit 6 to notify that the top moving rail 20 is interfering with the second irradiation field, based on irradiation field range information on the range 97 of the second irradiation field of X-rays irradiated from the second X-ray irradiator 34 and component position information on the position of the top moving rail 20. This allows the user to recognize that the top moving rail 20 is interfering with the second irradiation field, thereby preventing an increase in exposure dose due to retaking of X-ray images or an extension of the fluoroscopic imaging time caused by the top moving rail 20 interfering with the second irradiation field.

[0152] The other effects of the first modified example are the same as those of the first embodiment.

[0153] In the first embodiment, the tabletop installation member 2 includes the tabletop moving rails 20 and the second X-ray detection unit moving member 21, but the present invention is not limited to this. For example, the tabletop installation member 2 may be configured to include a gripping member 22, as in an X-ray imaging apparatus 150 of a second modified example shown in FIG.

[0154] In the second modified example, the gripping member 22 is provided on the tabletop 1 and configured to be gripped by the subject 9. The gripping member 22 is configured to include a metal portion having a lower X-ray transmittance than the portion of the tabletop 1 on which the subject 9 is placed.

[0155] The position information acquisition unit 50 is configured to acquire member position information regarding the position of the gripping member 22, for example, based on the acquired position information of the tabletop 10. The image generation unit 51 is configured to generate a third superimposed image (not shown) and display the generated third superimposed image on the display unit 60 of the notification unit 6 when the user selects X-ray photography or fluoroscopic photography using the first X-ray photography unit 30. The third superimposed image is an image in which an irradiation field image 93 indicating the range 99 of the first irradiation field at a predetermined height position, an image indicating the position of the gripping member 22, and an interference information image 92 as interference information 90 indicating the range in which the gripping member 22 interferes in the first irradiation field are superimposed on the optical image 40 captured by the optical imaging unit 4.

[0156] 20, the top board installation member 2 may be configured to include a support base 23. For ease of explanation, the second X-ray imaging unit 33 is not shown in FIG.

[0157] The X-ray imaging device 160 is configured to be able to image the subject 9 lying on the tabletop 10 (supine position) according to the first embodiment shown in Fig. 1, and also to be able to image the subject 9 standing (standing position) as in the third modified example shown in Fig. 20. That is, the X-ray imaging device 160 is configured such that the tabletop 10 and the first X-ray imaging unit 30 are rotatable about an axis that is perpendicular to the longitudinal direction of the tabletop 10 and faces the horizontal direction.

[0158] 20, when imaging the subject 9 in a standing position (standing position), the support table 23 is provided on the tabletop 1 and is configured to support the subject 9. The support table 23 is configured to include a metal portion having a lower X-ray transmittance than the portion of the tabletop 1 on which the subject 9 is placed.

[0159] The position information acquisition unit 50 is configured to acquire component position information related to the position of the support base 23, for example, based on the acquired position information of the tabletop 10. The image generation unit 51 is configured to generate a fourth superimposed image (not shown) and display the generated fourth superimposed image on the display unit 60 of the notification unit 6 when the user selects X-ray photography or fluoroscopic photography using the first X-ray photography unit 30. The fourth superimposed image is an image in which an irradiation field image 93 indicating the range 99 of the first irradiation field at a predetermined height position, an image indicating the position of the support base 23, and an interference information image 92 as interference information 90 indicating the range in which the support base 23 interferes in the first irradiation field are superimposed on the optical image 40 captured by the optical imaging unit 4.

[0160] In the first embodiment, the control unit displays an interference information image, which is an interference area indicated by a semitransparent color that allows the optical image to be viewed, superimposed on the optical image on the display unit. However, the present invention is not limited to this. For example, the control unit may be configured to display an interference information image, which is an interference information image, on the display unit by superimposing a frame image that indicates the outer edge of the interference area on the optical image, or may be configured to display an interference information image, which is ... a semitransparent color that allows the optical image to be viewed by flashing, superimposed on the optical image on the display unit. The form of the interference information image is not particularly limited.

[0161] The control unit may also be configured to cause the display unit to display an icon indicating that the top board installation member is interfering with the irradiation field as an interference information image. That is, the control unit may be configured to cause the display unit to display an icon such as a figure, rather than causing the display unit to display an image indicating the interference range superimposed on the optical image.

[0162] In the first embodiment, the control unit displays on the display unit a first superimposed image in which an image indicating the range of the first irradiation field, an image indicating the position of the tabletop installation member, and an interference information image as interference information indicating the range of interference of the tabletop installation member in the first irradiation field are aligned and superimposed on the optical image. However, the present invention is not limited to this. For example, the control unit may be configured to display on the display unit a first superimposed image in which the interference information image is superimposed on the optical image without superimposing the image indicating the range of the first irradiation field and the image indicating the position of the tabletop installation member on the optical image, based on the irradiation field range information and the component position information. Furthermore, for example, the control unit may be configured to display on the display unit a first superimposed image in which the image indicating the range of the first irradiation field and the interference information image are superimposed on the optical image without superimposing the image indicating the position of the tabletop installation member on the optical image, based on the irradiation field range information and the component position information.

[0163] In the first embodiment, the controller displays both a frame image indicating the position of the tabletop moving rail and a frame image indicating the position of the second X-ray detection unit moving member in the first superimposed image, but the present invention is not limited to this. For example, the controller may be configured to display either a frame image indicating the position of the tabletop moving rail or a frame image indicating the position of the second X-ray detection unit moving member in the first superimposed image. In this case, the controller may be configured to display either an interference information image of the tabletop moving rail or an interference information image of the second X-ray detection unit moving member in the first superimposed image.

[0164] [Aspect] It will be appreciated by those skilled in the art that the exemplary embodiments described above are examples of the following aspects.

[0165] (Item 1) an X-ray imaging unit including an X-ray irradiation unit that irradiates an object with X-rays and an X-ray detection unit that detects the X-rays that have passed through the object; a top plate portion on which the subject is placed and which is movable relative to the X-ray imaging unit; a tabletop installation member provided on the tabletop, the tabletop installation member including a material having a lower X-ray transmittance than a portion of the tabletop on which the subject is placed; The notification department, and a control unit that controls the notification unit to notify that the tabletop installation member is interfering with the irradiation field based on irradiation field range information regarding the range of the irradiation field of X-rays irradiated from the X-ray irradiation unit and component position information regarding the position of the tabletop installation member.

[0166] (Item 2) The X-ray imaging device described in item 1, wherein the top panel installation member includes at least one of: top panel movement rails provided at both ends of the top panel in the short direction and for sliding the top panel included in the top panel in the longitudinal direction of the top panel; an X-ray detection unit movement member provided on the top panel, for placing the X-ray detection unit arranged on the top panel and for moving the X-ray detection unit in the longitudinal direction of the top panel; a holding member provided on the top panel and held by the subject; and a support base provided on the top panel and supporting the subject, and is configured to include a metal portion with low X-ray transmittance.

[0167] (Item 3) the notification unit includes a display unit, 3. The X-ray imaging device according to item 1 or 2, wherein the control unit is configured to cause the display unit to display interference information indicating that the tabletop installation member is interfering with the irradiation field based on the irradiation field range information and the member position information.

[0168] (Item 4) an optical imaging unit that captures an optical image of the subject and the tabletop, the display unit is configured to display the optical image captured by the optical imaging unit, Item 4. The X-ray imaging apparatus according to item 3, wherein the control unit is configured to superimpose an interference information image as the interference information indicating the range in which the tabletop installation member interferes in the irradiation field on the optical image and display the image on the display unit.

[0169] (Item 5) the notification unit includes a speaker, The X-ray imaging device according to any one of items 1 to 4, wherein the control unit is configured to cause the speaker to notify that the tabletop installation component is interfering with the irradiation field based on the irradiation field range information and the component position information.

[0170] (Item 6) the X-ray irradiator includes a first X-ray irradiator and a second X-ray irradiator; the X-ray detection unit includes a first X-ray detection unit and a second X-ray detection unit; the X-ray imaging unit includes a first X-ray imaging unit including the first X-ray irradiator arranged on the top panel and the first X-ray detector arranged at a position facing the first X-ray irradiator across the top panel, and a second X-ray imaging unit including the second X-ray detector arranged on the top panel and the second X-ray irradiator arranged on the opposite side of the top panel from the second X-ray detector, the tabletop installation member is the tabletop moving rail, The control unit is configured to cause the alarm unit to notify that the tabletop moving rail is interfering with the first irradiation field or the second irradiation field based on the irradiation field range information regarding the range of the first irradiation field of X-rays irradiated from the first X-ray irradiation unit or the range of the second irradiation field of X-rays irradiated from the second X-ray irradiation unit and the component position information regarding the position of the tabletop moving rail.

[0171] (Item 7) the X-ray irradiator includes a first X-ray irradiator and a second X-ray irradiator; the X-ray detection unit includes a first X-ray detection unit and a second X-ray detection unit; the X-ray imaging unit includes a first X-ray imaging unit including the first X-ray irradiator arranged on the top panel and the first X-ray detector arranged at a position facing the first X-ray irradiator across the top panel, and a second X-ray imaging unit including the second X-ray detector arranged on the top panel and the second X-ray irradiator arranged on the opposite side of the top panel from the second X-ray detector, the top board installation member is a second X-ray detection unit moving member serving as the X-ray detection unit moving member, 7. The X-ray imaging device according to item 2 or 6, wherein the control unit is configured to cause the notification unit to notify that the second X-ray detection unit moving member is interfering with the first irradiation field, based on the irradiation field range information regarding the range of a first irradiation field of X-rays irradiated from the first X-ray irradiation unit and the member position information regarding the position of the second X-ray detection unit moving member.

[0172] (Item 8) The control unit is configured to, at least during X-ray imaging by the X-ray imaging unit, cause the notification unit to notify that the tabletop installation member is interfering with the irradiation field based on the irradiation field range information and the member position information.

[0173] (Item 9) the display unit is configured to display an irradiation field image including an X-ray image based on a detection signal detected by the X-ray detection unit and indicating a range of the irradiation field; Item 3. The X-ray imaging device according to item 3, wherein the control unit is configured to superimpose an interference information image as the interference information indicating the range in which the tabletop installation member interferes in the irradiation field on the irradiation field image including the X-ray image and display the image on the display unit.

[0174] (Item 10) a driving unit that moves at least one of the X-ray imaging unit and the top board included in the top board unit, The X-ray imaging device according to claim 9, wherein the control unit is configured to move the irradiation field image showing the range of the irradiation field on the display unit on the X-ray image in accordance with movement of at least one of the X-ray imaging unit and the tabletop by the drive unit. [Explanation of symbols]

[0175] 100, 110, 120, 130, 140, 150, 160 X-ray equipment 9. Subjects 1 Top plate 2 Top plate installation parts 3. X-ray Department 4 Optical imaging unit 5. Control section 6. Notification Department 10. Top plate 20 Top plate moving rail 21 Second X-ray detection unit moving member 22 Gripping member 23 Support stand 30 1st X-ray Department 31 1st X-ray irradiation section 32 First X-ray detector 33 2nd X-ray Department 34 2nd X-ray irradiation section 35 Second X-ray detector 40 Optical Images 60 Display section 61 Speaker 84 First top plate drive unit (drive unit) 85 Second top plate drive unit (drive unit) 87 Second pillar drive unit (drive unit) 90 Interference Information 92, 192 Interferometric image 98 LIH images (X-ray images) 193 irradiation field images

Claims

1. an X-ray imaging unit including an X-ray irradiation unit that irradiates an object with X-rays and an X-ray detection unit that detects the X-rays that have passed through the object; a top plate portion on which the subject is placed and which is movable relative to the X-ray imaging unit; a tabletop installation member provided on the tabletop, the tabletop installation member including a material having a lower X-ray transmittance than a portion of the tabletop on which the subject is placed; The notification department, and a control unit that controls the notification unit to notify that the tabletop installation member is interfering with the irradiation field based on irradiation field range information regarding the range of the irradiation field of X-rays irradiated from the X-ray irradiation unit and component position information regarding the position of the tabletop installation member.

2. 2. The X-ray imaging device according to claim 1, wherein the top panel installation member includes at least one of: top panel movement rails provided at both ends of the top panel in the short direction, for sliding the top panel included in the top panel in the longitudinal direction of the top panel; an X-ray detection unit movement member provided on the top panel, for placing the X-ray detection unit arranged on the top panel and for moving the X-ray detection unit in the longitudinal direction of the top panel; a holding member provided on the top panel and held by the subject; and a support base provided on the top panel, for supporting the subject, and is configured to include a metal portion with low X-ray transmittance.

3. the notification unit includes a display unit, 2. The X-ray imaging device according to claim 1, wherein the control unit is configured to cause the display unit to display interference information indicating that the tabletop installation member is interfering with the irradiation field based on the irradiation field range information and the member position information.

4. an optical imaging unit that captures an optical image of the subject and the tabletop, the display unit is configured to display the optical image captured by the optical imaging unit, 4. The X-ray imaging device according to claim 3, wherein the control unit is configured to superimpose an interference information image as the interference information indicating the range in which the tabletop installation member interferes in the irradiation field on the optical image and display the image on the display unit.

5. the notification unit includes a speaker, 2. The X-ray imaging apparatus according to claim 1, wherein the control unit is configured to notify, through the speaker, that the tabletop installation member is interfering with the irradiation field based on the irradiation field range information and the member position information.

6. the X-ray irradiator includes a first X-ray irradiator and a second X-ray irradiator; the X-ray detection unit includes a first X-ray detection unit and a second X-ray detection unit; the X-ray imaging unit includes a first X-ray imaging unit including the first X-ray irradiator arranged on the top panel and the first X-ray detector arranged at a position facing the first X-ray irradiator across the top panel, and a second X-ray imaging unit including the second X-ray detector arranged on the top panel and the second X-ray irradiator arranged on the opposite side of the top panel from the second X-ray detector, the tabletop installation member is the tabletop moving rail, 3. The X-ray imaging device according to claim 2, wherein the control unit is configured to cause the alarm unit to notify that the tabletop moving rail is interfering with the first irradiation field or the second irradiation field, based on the irradiation field range information regarding the range of a first irradiation field of X-rays irradiated from the first X-ray irradiation unit or the range of a second irradiation field of X-rays irradiated from the second X-ray irradiation unit and the component position information regarding the position of the tabletop moving rail.

7. the X-ray irradiator includes a first X-ray irradiator and a second X-ray irradiator; the X-ray detection unit includes a first X-ray detection unit and a second X-ray detection unit; the X-ray imaging unit includes a first X-ray imaging unit including the first X-ray irradiator arranged on the top panel and the first X-ray detector arranged at a position facing the first X-ray irradiator across the top panel, and a second X-ray imaging unit including the second X-ray detector arranged on the top panel and the second X-ray irradiator arranged on the opposite side of the top panel from the second X-ray detector, the top board installation member is a second X-ray detection unit moving member serving as the X-ray detection unit moving member, 3. The X-ray imaging device according to claim 2, wherein the control unit is configured to cause the notification unit to notify that the second X-ray detection unit moving member is interfering with the first irradiation field, based on the irradiation field range information regarding a range of a first irradiation field of X-rays irradiated from the first X-ray irradiation unit and the member position information regarding a position of the second X-ray detection unit moving member.

8. 2. The X-ray imaging device according to claim 1, wherein the control unit is configured to cause the notification unit to notify that the tabletop installation member is interfering with the irradiation field based on the irradiation field range information and the member position information, at least during fluoroscopic imaging by the X-ray imaging unit.

9. the display unit is configured to display an irradiation field image including an X-ray image based on a detection signal detected by the X-ray detection unit and indicating a range of the irradiation field; 4. The X-ray imaging device according to claim 3, wherein the control unit is configured to superimpose an interference information image as the interference information indicating the range in which the tabletop installation member interferes in the irradiation field on the irradiation field image including the X-ray image and display the image on the display unit.

10. a driving unit that moves at least one of the X-ray imaging unit and the top board included in the top board unit, 10. The X-ray imaging device according to claim 9, wherein the control unit is configured to move the irradiation field image indicating the range of the irradiation field on the display unit on the X-ray image in accordance with movement of at least one of the X-ray imaging unit and the tabletop by the drive unit.

Images