X-ray diagnostic apparatus, x-ray imaging control method, and x-ray imaging control program

Abstract

To improve the workflow of multi-shot long-length imaging.SOLUTION: An X-ray diagnostic apparatus according to the present embodiment includes an X-ray tube holding unit, a presentation unit, a calculation unit, and a control unit. The X-ray tube holding unit holds an X-ray tube that generates X-rays and an X-ray diaphragm that collimates the X-rays. The presentation unit is provided on the X-ray tube holding unit and presents the entire range of the long-length imaging with respect to a subject to an operator. The calculation unit calculates, on the basis of the first position and orientation information regarding the position and orientation of the X-ray tube at the time of presentation of the entire range, and the size of the entire range, the number of imaging in the long-length imaging, second position and orientation information regarding the position and orientation of the X-ray tube in each of the plurality of times of imaging in the long-length imaging, and the aperture of the diaphragm in the X-ray diaphragm in each of the plurality of times of imaging. The control unit controls the plurality of times of imaging in the long-length imaging using the second position and orientation information, the aperture, and the number of imaging.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The embodiments disclosed in this specification and the drawings relate to an X-ray diagnostic apparatus, an X-ray photography control method, and an X-ray photography control program. [Background technology]

[0002] X-ray diagnostic equipment is used in the medical field to perform X-ray photography by irradiating an object with X-rays and detecting the X-rays that have passed through the object. The imaging range is limited in a single X-ray photography using an X-ray tube. For this reason, one of the imaging methods used in X-ray diagnostic equipment is multi-shot long-length imaging, in which X-ray photography is performed multiple times at different positions, and one-shot long-length imaging, in which a long-length image is obtained in one shot on multiple flat panel detectors (FPDs). In multi-shot long-length imaging, the imaging range is expanded by stitching together multiple X-ray images taken at different positions.

[0003] In multi-shot long-length imaging, the first and last imaging positions are set and read into the X-ray diagnostic device before X-ray imaging is performed, so that the X-ray diagnostic device recognizes the entire long-length imaging range and calculates the optimal number of images and aperture opening. The workflow for determining the entire imaging range specific to multi-shot long-length imaging requires changing the position of the device multiple times, which causes a lot of effort and time loss for the operator. Furthermore, the operator cannot visually recognize the entire imaging range in long-length imaging. Therefore, there is a problem that it is difficult for the operator to recognize the entire range in which long-length imaging is performed. In addition, multi-shot long-length imaging has a cost advantage over one-shot long-length imaging in that it does not require multiple FPDs. Therefore, even if a facility where an X-ray diagnostic device is installed wants to adopt multi-shot long-length imaging, there is a disadvantage in that the workflow in multi-shot long-length imaging becomes worse as described above.

[0004] Furthermore, one-shot long-length photography requires a time-consuming workflow in which the shooting range is set while manipulating the position of the device. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2009-291356 A Summary of the Invention [Problem to be solved by the invention]

[0006] One of the problems to be solved by the embodiments disclosed in this specification and the drawings is to improve the workflow in multi-shot long-length photography. However, the problems to be solved by the embodiments disclosed in this specification and the drawings are not limited to the above problem. Problems corresponding to the effects of each configuration shown in the embodiments described below can also be positioned as other problems. [Means for solving the problem]

[0007] The X-ray diagnostic apparatus according to the present embodiment includes an X-ray tube holder, a presentation unit, a calculation unit, and a control unit. The X-ray tube holder holds an X-ray tube that generates X-rays and an X-ray aperture that collimates the X-rays. The presentation unit is provided on the X-ray tube holder and presents an entire range of long-length photography of a subject to an operator. The calculation unit calculates the number of images in the long-length photography, second position and orientation information on the position and orientation of the X-ray tube in each of the multiple images in the long-length photography, and the aperture opening of the X-ray aperture in each of the multiple images, based on first position and orientation information on the position and orientation of the X-ray tube when the entire range is presented and the size of the entire range. The control unit controls the multiple images in the long-length photography using the second position and orientation information, the aperture, and the number of images. [Brief description of the drawings]

[0008] [Figure 1] FIG. 1 is a diagram showing an example of the arrangement of an X-ray diagnostic apparatus according to the first embodiment. [Diagram 2] FIG. 2 is a flowchart showing an example of a procedure of long length shooting processing according to the first embodiment. [Diagram 3] FIG. 3 is a diagram showing an example of an overview of long length shooting processing according to the first embodiment. [Figure 4] FIG. 4 is a diagram showing an example of an overview of long length shooting processing in the first embodiment and an overview of long length shooting processing in a comparative example. [Diagram 5] FIG. 5 is a diagram showing an example of the arrangement of an X-ray diagnostic apparatus according to the second embodiment. [Figure 6] FIG. 6 is a flowchart showing an example of a procedure of long length shooting processing according to the second embodiment. [Figure 7] FIG. 7 is a diagram showing an example of an overview of long length shooting processing in the second embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Hereinafter, an embodiment of an X-ray diagnostic apparatus, an X-ray photography control method, and an X-ray photography control program will be described with reference to the drawings. In the following embodiments, parts with the same reference numerals perform the same operation, and duplicated descriptions will be omitted as appropriate. In addition, in the following, an X-ray diagnostic apparatus that X-rays a subject in a standing position will be described in order to make the description more specific. Note that the technical features of this embodiment are not limited to an X-ray diagnostic apparatus that X-rays a subject in a standing position.

[0010] (First embodiment) An example of an X-ray diagnostic apparatus 1 according to the first embodiment will be described with reference to Fig. 1. Fig. 1 is a diagram showing an example of the configuration of the X-ray diagnostic apparatus 1 according to the first embodiment. As shown in Fig. 1, the X-ray diagnostic apparatus 1 has an imaging device 10 and a console 20. When X-raying a subject P in a standing position, as shown in Fig. 1, the imaging device 10 has a stand 11, an X-ray tube holding device 12, an X-ray detector 13 supported movably relative to the stand 11, a high-voltage power supply 14, an X-ray tube moving device 15, a detector moving device 16, and a controller 17.

[0011] The X-ray tube holding device 12 in the imaging device 10 has an X-ray tube 31, an X-ray aperture 32, an operation panel 33, and an irradiation field lamp 34. That is, the X-ray tube holding device 12 holds the X-ray tube 31 that generates X-rays, the X-ray aperture 32 that collimates the X-rays, the irradiation field lamp 34, and a mirror 35. The X-ray tube holding device 12 may be referred to as an X-ray tube holding unit.

[0012] The X-ray tube holding device 12 is suspended, for example, from the ceiling of an examination room in which the X-ray diagnostic apparatus 1 is placed via an X-ray tube moving device 15. The X-ray tube holding device 12 may be placed on the floor of the examination room via the X-ray tube moving device 15. The X-ray tube holding device 12 is freely movable, under the control of a controller 17 via the X-ray tube moving device 15, in the vertical direction and in two directions that are perpendicular to the vertical direction and perpendicular to each other.

[0013] 1, a subject P in an upright position is positioned in front of a stand 11. The X-ray detector 13 is controlled by a controller 17 via a detector moving device 16, and can be moved in conjunction with the controller 17 to maintain the positional relationship between the orientation of the X-ray tube 31 at the irradiation port and the X-ray detector 13. The X-ray detector 13 supported by the stand 11 moves along the stand 11 in conjunction with the movement of the orientation of the X-ray tube holding device 12 so that the X-ray detector 13 is positioned within an X-ray range according to the orientation of the X-ray tube 31 irradiation port, for example.

[0014] The movement of the X-ray detector 13 according to the direction of the radiation port of the X-ray tube 31, that is, the control of the X-ray tube holding device 12 by the controller 17 to rotate the direction of the radiation port of the X-ray tube 31 along the long axis direction of long-length photography (hereinafter referred to as a rotation method) is an example of X-ray long-length photography. The method of X-ray long-length photography is not limited to the above, and may be realized by, for example, a stepping method in which the X-ray tube 31 and the X-ray detector 13 are both moved in parallel along the vertical direction. At this time, the X-ray tube holding device 12 is controlled by the controller 17 via the X-ray tube moving device 15, and the X-ray detector 13 is controlled by the controller 17 via the detector moving device 16, so that the positional relationship between the center position (tube focus) of the X-ray tube 31 and the positional relationship between the X-ray detector 13 (for example, Source-to-Image Distance: Source-to-Image Distance (SID)) are maintained. For example, the X-ray detector 13 supported by the stand 11 moves along the stand 11 in conjunction with the movement of the X-ray tube holding device 12 so as to maintain a state in which the center position of the X-ray tube 31 and the approximate center position of the X-ray detector 13 face each other.

[0015] Further, the method of X-ray long-length photography is not limited to the above-mentioned rotation method and stepping method, and other methods such as slot scanning may be used. In slot scanning, the controller 17 controls the X-ray tube holding device 12 so that X-rays collimated on a slit by the X-ray aperture 32 are continuously irradiated onto the subject P. At this time, the controller 17 controls the X-ray tube moving device 15 so as to move the X-ray tube holding device 12 along the vertical direction. In addition, the controller 17 controls the detector moving device 16 so as to move the X-ray detector 13 along the vertical direction together with the movement of the X-ray tube holding device 12.

[0016] The X-ray detector 13 is configured, for example, by a flat panel detector (FPD) having a plurality of X-ray detection elements arranged two-dimensionally. The X-ray detector 13 detects X-rays that have passed through the subject P and reached the X-ray detector 13. The X-ray detector 13 outputs X-ray projection data based on the detected X-rays. The X-ray detector 13 outputs the projection data to the console 20 via the controller 17. The X-ray detector 13 may be realized by an image intensifier, a TV camera, or the like. Also, the function of outputting X-ray projection data based on the detected X-rays may be realized by the processing circuitry 24. At this time, the X-ray detector 13 outputs data related to the detected X-rays to the processing circuitry 24. Next, the processing circuitry 24 generates the projection data of the X-rays based on the data related to the detected X-rays by an image generation function (not shown).

[0017] The X-ray tube 31 generates X-rays. The X-ray tube 31 is held by the X-ray tube holding device 12. For example, the X-ray tube 31 is a vacuum tube that irradiates thermoelectrons from a cathode (filament) to an anode (target) by application of high voltage from the high voltage power supply 14. X-rays are generated when the thermoelectrons collide with the target. The X-ray tube 31 may be, for example, a rotating anode type X-ray tube that generates X-rays by irradiating a rotating anode with thermoelectrons. Note that the type of the X-ray tube 31 is not limited to the rotating anode type, and any type of X-ray tube may be applied. The X-ray tube 31 is, for example, disposed opposite the X-ray detector 13 with the subject P in between. In addition, the X-ray tube 31 is controlled by the controller 17 via the X-ray tube moving device 15, and rotates in conjunction with the movement of the X-ray detector 13 so as to maintain the focal position of the X-ray tube 31 facing approximately the center position of the X-ray detector 13 along the direction of the irradiation port of the X-ray tube 31.

[0018] The high voltage power supply 14 is composed of electric circuits such as a transformer and a rectifier. The high voltage power supply 14 has, for example, a high voltage generator and an X-ray control device. The high voltage generator has a function of generating a high voltage to be applied to the X-ray tube 31 and a filament current to be supplied to the X-ray tube 31. The high voltage generator may be of a transformer type or an inverter type. The X-ray control device controls the output voltage according to the X-rays irradiated by the X-ray tube 31.

[0019] The X-ray aperture 32 collimates the X-rays. That is, the X-ray aperture 32 shapes the irradiation field of the X-rays generated by the X-ray tube 31. The X-ray aperture 32 is provided in front of the X-ray radiation window (irradiation port) of the X-ray tube 31. The X-ray aperture 32 is held by the X-ray tube holding device 12. The X-ray aperture 32 has a plurality of blades made of a metal that blocks X-rays, such as lead. The X-ray aperture 32 is also called an X-ray movable aperture or simply an aperture. The X-ray aperture 32 has a mechanism for adjusting the X-ray irradiation field generated by the X-ray tube 31. The X-ray aperture 32 is controlled by the controller 17 to adjust the irradiation range of the X-rays irradiated from the X-ray tube 31. The X-ray aperture 32 can open the aperture larger than the maximum aperture opening during X-ray imaging when presenting the entire range of long-length imaging to the operator.

[0020] The operation panel 33 is provided on the housing of the X-ray tube holding device 12. The operation panel 33 has hard keys such as buttons and a display input device. The hard keys output unique instruction signals to the processor in response to pressing by an operator. The display input device has a monitor and a touch sensor that functions as an input interface provided near the monitor.

[0021] The monitor of the operation panel 33 displays various information such as images showing information related to the X-ray diagnostic apparatus 1. In addition, the operator can input various instructions for the images displayed on the monitor to the X-ray diagnostic apparatus 1 via the touch sensor or hard keys of the operation panel 33. The operation panel 33 outputs a signal corresponding to the operator's input to the processing circuit 24 of the console 20. The operation panel 33 may be referred to as an operation unit.

[0022] The irradiation field lamp 34 is turned on by power supplied from an irradiation field lamp power supply (not shown). The irradiation field lamp 34 irradiates illumination light toward the subject P via the mirror 35 and the X-ray aperture 32. The operator can confirm the irradiation field irradiated with X-rays by the illumination light irradiated to the body surface of the subject P. The irradiation field lamp 34 and the mirror 35 correspond to a presentation unit, and the presentation unit is provided in the X-ray tube holding device 12. In the setting of long-length photography, the presentation unit presents the entire range of long-length photography of the subject P to the operator. That is, the irradiation field lamp 34 and the mirror 35 present the entire range of long-length photography to the operator by irradiating the subject P with visible light. For example, the irradiation field lamp 34 and the mirror 35 present the entire range of long-length photography to the operator by irradiating the subject P with visible light in an irradiation range linked to the opening degree of the X-ray aperture 32.

[0023] In the above description, the visible light is generated by the irradiation field lamp 34, but the generation of the visible light is not limited to the irradiation field lamp 34. The generation of the visible light may be realized by a known visible light generating device such as a laser generating device.

[0024] The controller 17 includes at least a processor and a storage circuit. The controller 17 is controlled by the console 20 according to a program stored in the storage circuit. As a result, the controller 17 comprehensively controls each component of the imaging device 10. For example, the controller 17 controls an X-ray irradiation system to perform long-length imaging for generating a long-length image of the subject P. By performing the long-length imaging, the controller 17 generates projection data and outputs the generated projection data to the console 20. The controller 17 corresponds to a control unit. Note that the functions realized by the controller 17 may be realized by a processing circuit 24. At this time, the processing circuit 24 comprehensively controls each component of the imaging device 10 by a control function (not shown). Also, the control function performs long-length imaging by controlling the imaging device 10. The processing circuit 24 that realizes the control function corresponds to a control unit.

[0025] The console 20 has an input interface 21, a display 22, a storage circuit 23, and a processing circuit 24. The console 20 is not limited to being provided independently. For example, the functions of the input interface 21 and the display 22 of the console 20 may be performed by the operation panel 33 of the imaging device 10, and the functions of the storage circuit 23 and the processing circuit 24 may be performed by the storage circuit and the processor of the controller 17 of the imaging device 10, respectively.

[0026] The input interface 21 of the console 20 can be, for example, a mouse, a keyboard, a trackball, a switch, a button, a joystick, a foot switch, a touch pad, a touch panel display, etc., as appropriate. The input interface 21 also has a hand switch for instructing the timing of X-ray exposure, etc. The input interface 21 outputs an operation signal corresponding to an operation by an operator to the processing circuit 24. The input interface 21 corresponds to an input unit.

[0027] In this embodiment, the input interface 21 is not limited to one having physical operation parts such as a mouse, a keyboard, a trackball, a switch, a button, a joystick, a touchpad, and a touch panel display. For example, an example of the input interface 21 includes an electrical signal processing circuit that receives an electrical signal corresponding to an input operation from an external input device provided separately from the device and outputs the electrical signal to the processing circuit 24. The input interface 21 may be configured as a tablet terminal or the like capable of wireless communication with the processing circuit 24.

[0028] The display 22 may be, for example, a liquid crystal display (LCD), a cathode ray tube (CRT) display, an organic electroluminescence display (OELD), a plasma display, or any other arbitrary display. The display 22 may be a desktop type, or may be configured as a tablet terminal or the like capable of wireless communication with the processing circuit 24. The display 22 displays various information according to the control of the processing circuit 24. The display 22 corresponds to a display unit.

[0029] The storage circuit 23 is realized by a magnetic or optical recording medium, a semiconductor memory, or the like. For example, the storage circuit 23 is realized by a storage device such as an HDD, an SSD (Solid State Drive), or an integrated circuit storage device that stores various information. In addition to the HDD or SSD, the storage circuit 23 may be realized by a portable storage medium such as a CD (Compact Disc), a DVD (Digital Versatile Disc), or a flash memory, or a drive device that reads and writes various information between the storage circuit 23 and a semiconductor memory element such as a RAM (Random Access Memory). The storage circuit 23 includes a storage medium that can be read by a processor. A part or all of the programs and data stored in the storage circuit 23 may be configured to be downloaded via various networks. The storage circuit 23 may be referred to as a memory.

[0030] The processing circuitry 24 is a processor that executes processing for easily positioning the center (tube focus) of the X-ray tube 31 in front of the position of interest and performing X-ray imaging by reading and executing a program stored in the memory circuitry 23. The processing circuitry 24 also performs overall control of each component of the imaging device 10 via the controller 17.

[0031] The processing circuitry 24 executes the calculation function 241 to calculate various imaging parameters (hereinafter referred to as long length imaging parameters) related to the execution of long length imaging. The long length imaging parameters are, for example, the number of images in long length imaging, information on the position and posture of the X-ray tube 31 in each of the multiple images in long length imaging, and the aperture opening of the X-ray aperture 32 in each of the multiple images in long length imaging. Note that the calculated long length imaging parameters are not limited to the above, and may include, for example, the X-ray conditions, the driving conditions of the FPD, the timing of exposure, and the like in each of the multiple images in long length imaging.

[0032] Information regarding the position and attitude of the X-ray tube 31 in each of a plurality of long-length imaging corresponds to, for example, the three-dimensional position of the tube focus of the X-ray tube 31 and the direction (angle) of the X-ray irradiation port of the X-ray tube 31. Furthermore, the X-ray conditions include, for example, the tube voltage, tube current, tube current time product, settings of various filters, etc. The driving conditions of the FPD include, for example, the driving timing of switching related to the period related to the timing of reading out the electric charge in each X-ray detection element.

[0033] The processing circuit 24 calculates the number of shots in the long-length photography, information on the position and attitude of the X-ray tube 31 in each of the multiple shots of the long-length photography (hereinafter referred to as second position and attitude information), and the aperture opening of the X-ray aperture 32 in each of the multiple shots, based on information on the position and attitude of the X-ray tube 31 when the entire range of the long-length photography is presented to the subject P (hereinafter referred to as first position and attitude information) and the size of the entire range of the long-length photography, using the calculation function 241. The first position and attitude information is information indicating the three-dimensional position and attitude of the X-ray tube 31 when the entire range of the long-length photography is set. For example, the first position and attitude information corresponds to the position and attitude of the X-ray tube 31 at the time when the range of the long-length photography is set via the operation panel 33 by an instruction from an operator who visually recognizes the irradiation light irradiated from the irradiation field lamp 34 to the subject P.

[0034] The size of the entire range of the long-length photography corresponds to the irradiation range of the irradiation light when the entire range of the long-length photography is set. Specifically, the size of the entire range of the long-length photography is the position, vertical and horizontal lengths, etc. of the entire range. For example, the processing circuit 24 acquires the aperture opening of the X-ray aperture 32 at the time of the setting, the SID, and the first position and orientation information from the controller 17 and / or the X-ray tube holding device 12 by the calculation function 241. Next, the calculation function 241 calculates the size of the entire range of the long-length photography using the aperture opening, the SID, and the first position and orientation information. The calculated size of the entire range of the long-length photography is used to calculate the number of images in the long-length photography, the second position and orientation information, and the aperture opening of the X-ray aperture 32 in each of the multiple photographys.

[0035] The processing circuits implementing the controller 17, the processing circuit 24, the operation panel 33, etc., and the input interface 21 have, as hardware resources, processors such as a CPU (Central Processing Unit), an MPU (Micro Processing Unit), a GPU (Graphics Processing Unit), etc., and memories such as a ROM (Read Only Memory), a RAM (Random Access Memory), etc. In addition, the hardware resources may be implemented by processors such as an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA), other Complex Programmable Logic Devices (CPLD), and Simple Programmable Logic Devices (SPLD).

[0036] Various functions executed by the processor are stored in a memory (not shown) in the form of programs executable by a computer. The processor realizes the function corresponding to each program by reading the programs from the memory and executing them. In other words, each circuit that has read each program has the function corresponding to the read program.

[0037] The processing circuit 24 that executes the calculation function 241 corresponds to a calculation unit. The calculation function 241 is not limited to being realized by a single processing circuit. A processing circuit may be configured by combining a plurality of independent processors, and each processor may execute a program to realize the calculation function 241. The calculation function 241 may be realized by the controller 17.

[0038] The overall configuration of the X-ray diagnostic apparatus 1 according to the first embodiment has been described above. With such a configuration, the X-ray diagnostic apparatus 1 according to the first embodiment executes various processes related to long length imaging of the subject P (hereinafter, referred to as long length imaging process). The long length imaging process corresponds to processes from setting of an imaging range in which long length imaging is performed to completion of long length imaging.

[0039] The procedure of the long length shooting process will be described below with reference to Fig. 2 and Fig. 3. Fig. 2 is a flow chart showing an example of the procedure of the long length shooting process. Fig. 3 is a diagram showing an example of the outline of the long length shooting process. For the sake of concrete explanation, the long length shooting process will be described below as being performed by a rotation method. Note that the long length shooting process is not limited to the rotation method, and may be realized by other methods such as a stepping method or a slot scan.

[0040] (Long-length photography processing) (Step S201) The long length imaging mode is selected by an instruction from the operator via the operation panel 33 or the input interface 21. Next, the subject P is placed on the stand 11.

[0041] (Step S202) The X-ray tube holding device 12 is moved in front of the stand 11. The movement HAM of the X-ray tube holding device 12 is performed by an operator OP holding the X-ray tube holding device 12, for example, as shown in S202A of Fig. 3. Note that the position of the X-ray tube holding device 12 in the horizontal plane may be set by a locking mechanism that locks the X-ray tube holding device 12 at a preset position for long-length imaging.

[0042] Furthermore, the movement of the X-ray tube holding device 12 may be performed by the operation of the X-ray tube moving device 15 under the control of the controller 17 according to an instruction from the operator via the operation panel 33 or the input interface 21. When the X-ray tube holding device 12 is moved in front of the stand 11, the irradiation port AP is directed toward the stand 11 by the operator. The rotation HAR of the irradiation port (opening) AP is performed by the operator OP holding the X-ray tube holding device 12, for example, as shown in S202B of FIG. 3.

[0043] (Step S203) When the operator OP presses the irradiation light generation button on the operation panel 33, the irradiation field lamp 34 irradiates the range of long-length photography. Specifically, as shown in S203 of FIG. 3, pressing the irradiation light generation button irradiates the subject P with irradiation light. At this time, the aperture of the X-ray aperture 32 is opened wider than the maximum aperture opening during X-ray photography. As a result, as shown in S203 of FIG. 3, the irradiation light is irradiated to an irradiation range AO wider than the X-ray exposure range. Note that the irradiation range AO of the irradiation light may be linked to the aperture opening of the X-ray aperture 32. At this time, the presenting unit (irradiation field lamp 34 and mirror 35) presents the entire range of long-length photography to the operator OP by irradiating the subject P with visible light in an irradiation range linked to the aperture opening of the X-ray aperture 32.

[0044] (Step S204) The operator changes the tube position in the vertical direction. The change of the tube position, i.e., the movement (position adjustment) of the X-ray tube holding device 12, is performed by the operator OP holding the X-ray tube holding device 12, for example, as shown in HAM of S203 in FIG.

[0045] (Step S205) When an operation to complete the setting of the range of long-length imaging is input (Yes in step S205), the process of step S206 is performed. The operation to complete the setting of the range of long-length imaging is, for example, pressing a positioning completion button provided on the operation panel 33. In response to pressing the positioning completion button, the X-ray tube holding device 12 outputs the first position and orientation information and the aperture of the diaphragm to the processing circuit 24. Of the first position and orientation information, the position in the horizontal plane may be acquired by a lock mechanism. In addition, the first position and orientation information may be acquired by an encoder provided on the motor in the X-ray tube moving device 15. Pressing the positioning completion button is shown in S205 of FIG. 3. If the positioning completion button is not pressed (No in step S205), the process of step S204 is repeated.

[0046] (Step S206) The processing circuit 24 uses the aperture opening, the SID, and the first position and orientation information to calculate the size of the entire range of the long length imaging (position, vertical and horizontal width, etc.). The calculation function 241 also calculates the number of images in the long length imaging based on the size of the long length imaging and the size of the X-ray detection surface of the X-ray detector 13. The calculation function 241 calculates second position and orientation information and aperture opening in each of the multiple images in the long length imaging using the size of the entire range of the long length imaging, the first position and orientation information, and the number of images. Since the long length imaging in this embodiment is a rotational type, the second position and orientation information corresponds to the rotation angle of the X-ray tube holding device 12 in each of the multiple images.

[0047] When the long length imaging is performed by the stepping method and slot scan, the second position and orientation information corresponds to the vertical positions of the X-ray tube holding device 12 and the X-ray detector 13. Furthermore, the calculation function 241 may calculate the X-ray conditions, the driving conditions of the FPD, the timing of exposure, the moving speed of the X-ray detector 13, the operating speed of the X-ray tube holding device 12, and the like, in each of the multiple imaging operations of the long length imaging, based on the second position and orientation information. From the above, the calculation function 241 calculates the long length imaging parameters.

[0048] (Step S207) Based on the second position and orientation information, the controller 17 moves the X-ray detector 13 to the imaging position for the first image in the long-length imaging, and rotates the X-ray tube 31 to face the moved X-ray detector 13. As a result, the controller 17 operates the X-ray tube holding device 12 based on the second position and orientation information in response to the determination of the entire range of the long-length imaging, and executes preparation for the drive operation of the X-ray detector 13 based on the number of images to be captured.

[0049] For example, the controller 17 controls the detector moving device 16 to move the X-ray detector 13 to the imaging position for the first image in the long-length imaging. As a result, the detector moving device 16 operates its own motors, actuators, etc. under the control of the controller 17 to move the X-ray detector 13 to the imaging position for the first image in the long-length imaging. S207 in Fig. 3 shows the movement PDM of the X-ray detector 13 along the vertical direction.

[0050] 3, the X-ray tube moving device 15 operates its own motors, actuators, etc. under the control of the controller 17 to rotate the X-ray tube holding device 12 so that the irradiation port AP faces the moved X-ray detector 13. As a result, the X-ray tube 31 rotates so that the emission port AP of the X-ray tube 31 faces the X-ray detector 13. Also, the X-ray aperture 32 is adjusted to the calculated aperture opening under the control of the controller 17. As a result, the end of the exposure range EA coincides with the X-ray detector 13, as shown in S207 of FIG.

[0051] If the photographing switch on the operation panel 33 or the input interface 21 is a two-stage switch, the execution of this step may be triggered by, for example, pressing the photographing switch to the first stage.

[0052] (Step S208) In response to pressing of an imaging switch on the operation panel 33 or the input interface 21, the controller 17 executes long-length imaging of the subject P using the calculated imaging parameters. For example, the controller 17 controls multiple imaging operations for long-length imaging using the calculated second position and orientation information, the aperture of the iris, and the number of images to be captured. S208 in FIG. 3 shows a schematic diagram of long-length imaging of the subject P. As shown in S208 in FIG. 3, when the number of images to be captured in long-length imaging is three, the controller 17 moves the X-ray detector 13 three times in the vertical direction. At this time, the controller 17 rotates the X-ray tube holding device 12 (XR) in accordance with the movement IDM of the X-ray detector 13.

[0053] (Step S209) When the long-length imaging is completed, the controller 17 moves the X-ray detector 13 to the imaging position for the first image, and rotates the X-ray tube 31 to face the moved X-ray detector 13. The processing content in this step after the long-length imaging is completed is similar to that in step S207, and therefore the description will be omitted.

[0054] (Step S210) If long length photography is to be retaken (Yes in step S210), the processes from step S208 onwards are repeated. If long length photography is not to be retaken (No in step S210), the process of step S211 is executed. For example, the controller 17 determines whether or not reshooting is to be performed based on whether or not a reshoot button on the operation panel 33 or the input interface 21 has been pressed.

[0055] (Step S211) If there is next long length imaging for the subject P (Yes in step S212), the process of step S212 is executed. If there is no next long length imaging for the subject P (No in step S212), the long length imaging for the subject P is completed. For example, the controller 17 determines whether there is next long length imaging based on the description of the examination order and / or imaging protocol for the subject P.

[0056] (Step S212) The controller 17 controls the X-ray tube moving device 15 to move the X-ray tube holding device 12 according to the region of the next long-length imaging described in the examination order and / or the imaging protocol. The controller 17 also controls the X-ray aperture 32 to change the aperture opening according to the region of the next long-length imaging. Specifically, the controller 17 sets the next position of the X-ray tube holding device 12 corresponding to the next imaging target region and the next aperture opening of the X-ray aperture 32 based on the next imaging target region and the second position and orientation information related to the next long-length imaging following the long-length imaging. Next, the controller 17 moves the X-ray tube holding device 12 to the set next position after the long-length imaging is performed, and adjusts the aperture of the X-ray aperture 32 to the set next aperture after the long-length imaging is performed.

[0057] For example, if the part to be imaged in the first long-length imaging is the entire spine and the part to be imaged in the second long-length imaging is the lower limbs, the controller 17 sets the next position of the X-ray tube holding device 12 10 cm below the center position (second position and orientation information) of the long-length range set for the entire spine. In addition, the controller 17 sets the aperture 20 cm wider than the aperture set for the entire spine (second position and orientation information). Next, the controller 17 moves the X-ray tube holding device 12 to the next set position, adjusts the aperture of the X-ray aperture 32 to the next set aperture, and irradiates the subject P with irradiation light using the irradiation field lamp 34. After this step, the processes from step S205 onwards are repeated.

[0058] The X-ray diagnostic apparatus 1 according to the first embodiment described above is provided on an X-ray tube holding device 12 which holds an X-ray tube 31 which generates X-rays and an X-ray aperture 32 which collimates the X-rays, and presents the entire range of long-length photography for a subject P to an operator. Based on first position and orientation information relating to the position and orientation of the X-ray tube 31 at the time of presentation of the entire range of long-length photography and the size of the entire range of long-length photography, the number of images in the long-length photography, second position and orientation information relating to the position and orientation of the X-ray tube 31 in each of the multiple images in the long-length photography, and the aperture opening of the X-ray aperture 32 in each of the multiple images are calculated, and the multiple images for the long-length photography are controlled using the second position and orientation information, the aperture opening, and the number of images in the long-length photography.

[0059] Moreover, the X-ray diagnostic apparatus 1 according to the first embodiment presents the entire range of long-length photography to the operator by irradiating the subject P with visible light. Moreover, the X-ray diagnostic apparatus 1 according to the first embodiment is capable of opening the aperture larger than the maximum aperture during X-ray photography when presenting the entire range of long-length photography to the operator, and presents the entire range of long-length photography to the operator by irradiating the subject P with visible light in an irradiation range linked to the aperture aperture of the X-ray aperture 32. Moreover, the X-ray diagnostic apparatus 1 according to the first embodiment operates the X-ray tube holding device 12 based on the second position and orientation information in response to the determination of the entire range of long-length photography, and executes preparation for driving the X-ray detector 13 based on the number of images to be photographed. In addition, in the X-ray diagnostic apparatus 1 according to the first embodiment, when performing long-length photography, the X-ray tube holding device 12 is controlled to rotate the orientation of the irradiation port AP of the X-ray tube 31 along the long axis direction of the long-length photography, or to continuously irradiate the subject P with X-rays collimated onto a slit by the X-ray aperture 32.

[0060] FIG. 4 is a diagram showing an example of an outline EM of the long-length imaging process in this embodiment and an outline CE of the long-length imaging process in a comparative example. The outline EM of the long-length imaging process shown in FIG. 4 corresponds to FIG. 3. The difference between the outline EM of the long-length imaging process in this embodiment and the outline CE of the long-length imaging process in the comparative example is shown by a frame line DI in FIG. 4. As shown in FIG. 4, after the X-ray tube holding device 12 is moved (HAM), in the comparative example CE, it is necessary to irradiate the irradiation light ILAB at the lower end of the long-length imaging and irradiate the irradiation light ILAT at the upper end of the long-length imaging. On the other hand, in this embodiment EM, the entire range of the long-length imaging can be presented to the operator by irradiating the irradiation light ILA once. Therefore, in this embodiment EM, the workflow of the long-length imaging is improved compared to the comparative example CE, the operator's efforts can be reduced, and the inspection efficiency for the subject P can be improved.

[0061] Furthermore, in order for the operator to recognize (understand) the entire range of long-length photography, in Comparative Example CE, when irradiating light at one end of long-length photography, the operator needs to remember the irradiation range of the irradiation light at the other end of long-length photography. That is, in Comparative Example CE, it is difficult for the operator to recognize the entire range of long-length photography. On the other hand, in the embodiment, the operator can visually confirm the irradiation range at once, which reduces the burden on the operator.

[0062] Furthermore, the X-ray diagnostic apparatus 1 according to the first embodiment sets the next position of the X-ray tube holding device 12 corresponding to the next imaging target part and the next aperture of the X-ray aperture 32 based on the next imaging target part and the second position and orientation information for the next long-length imaging following the long-length imaging, moves the X-ray tube holding device 12 to the set next position after the long-length imaging, and adjusts the aperture of the X-ray aperture 32 to the set next aperture after the long-length imaging. This makes it possible to reduce the operator's operation of moving the X-ray tube holding device 12 when performing long-length imaging again and when performing the next long-length imaging.

[0063] From these facts, according to the X-ray diagnostic apparatus 1 of the first embodiment, in the workflow for determining the entire range of long-length photography, the position of the apparatus does not need to be changed multiple times compared to the comparative example CE, so that the effort and time loss of the operator can be reduced. In addition, according to the X-ray diagnostic apparatus 1 of the first embodiment, since the mechanism allows the operator to visually confirm the entire range of long-length photography, it is easy for the operator to recognize the entire range in which long-length photography is performed. Furthermore, according to the X-ray diagnostic apparatus 1 of the first embodiment, there is a cost advantage in that the multi-shot long length does not require multiple FPDs compared to the one-shot long length.

[0064] From the above, according to the X-ray diagnostic apparatus 1 of the first embodiment, by providing a mechanism for determining the entire range of long-length photography without changing the tube position / orientation while showing the entire range of long-length photography to the operator, it is possible to improve the workflow related to the position determination operation for long-length photography, i.e., it is possible to provide a simple workflow for multi-shot long-length photography, and the operator can set the long-length photography range while recognizing the entire range of the long-length photography.

[0065] Second embodiment The present embodiment is characterized in that long-length imaging processing is performed using an optical camera without using irradiation light. Fig. 5 is a diagram showing an example of the configuration of an X-ray diagnostic apparatus 2 according to the second embodiment. As shown in Fig. 5, the X-ray diagnostic apparatus 2 has an optical camera 37, a monitor 39, and a processing circuit (hereinafter referred to as a holding processing circuit) 41 mounted on the X-ray tube holding device 12, instead of the irradiation field lamp 34 and the mirror 35 shown in Fig. 1.

[0066] The optical camera 37 is a camera capable of optically photographing the subject P. The optical camera 37 may photograph the subject P and collect subject images in each of a plurality of long-length photographs. The optical camera 37 is provided, for example, on the lower surface of the housing of the X-ray tube holding device 12. The mounting position of the optical camera 37 on the housing of the X-ray tube holding device 12 is not limited to the lower surface, and the optical camera 37 may be provided on the upper surface of the housing. The optical camera 37 may include a depth camera. In this case, the optical camera 37 functions as a three-dimensional camera that can also obtain depth information of the subject P. The optical camera 37 photographs the subject P according to an instruction from an operator via the monitor 39 or the operation panel 33. The optical camera 37 outputs the subject image generated by photographing the subject P to the monitor 39 and / or the operation panel 33.

[0067] The monitor 39 displays an image of the subject P captured by the optical camera 37. The monitor 39 is disposed, for example, on at least one surface (for example, a side surface) of the housing of the X-ray tube holding device 12. The monitor 39 displays an image of the subject P captured by the optical camera 37. The monitor 39 may also serve as the operation panel 33. For the sake of concrete explanation, the monitor 39 is assumed to have a function as a touch sensor that also serves as the operation panel 33. In this case, the monitor 39 includes a holding processing circuit 41 capable of executing various processes. The hardware configuration of the holding processing circuit 41 is similar to that of the processing circuit 24 in the first embodiment, and therefore a description thereof will be omitted. The monitor 39 may be referred to as a display unit.

[0068] The holding processing circuit 41 includes a setting function 411 and a correction function 413. The setting function 411 sets the entire range of long-length photography for the subject image in response to an instruction from an operator. For example, when the entire range of long-length photography for the subject image is input by an instruction from the operator via a touch sensor (e.g., a drag operation), the setting function 411 sets the entire range of long-length photography for the subject image. The input of the entire range can be appropriately corrected by an instruction from the operator via the monitor 39. The setting of the entire range may also be performed after the operator moves the X-ray tube holding device 12.

[0069] The setting function 411 may set the entire range of long-length photography in the subject image based on the subject image and the part to be photographed in the long-length photography. For example, the setting function 411 specifies the part to be photographed from an examination order for long-length photography of the subject P. Specifically, the setting function 411 specifies the part to be photographed based on the examination purpose, disease name, photography target, etc. in the examination order. Next, the setting function 411 specifies the part to be photographed in the subject image using known image processing such as segmentation processing and image recognition processing on the subject image. With these, the setting function 411 sets the entire range of long-length photography in the subject image. The holding processing circuit 41 that realizes the setting function 411 corresponds to the setting unit.

[0070] The holding processing circuit 41 corrects the entire range of long length photography (hereinafter referred to as long length photography display frame) superimposed on the subject image based on the calculated second position and orientation information and the calculated aperture opening by the correction function 413. Hereinafter, a case will be described as an example in which long length photography is performed by the rotation method and the subject P is photographed by the optical camera 37 during the execution of long length photography. At this time, the subject image becomes a distorted image compared to the subject image used when the entire range of long length photography is set according to the rotation angle (second position and orientation information) of the X-ray tube holding device 12 in each of the multiple photographs. Therefore, the correction function 413 corrects the long length photography display frame (for example, a rectangular frame) set by the setting function 411 so as to match it with the subject image based on the second position and orientation information and the aperture opening.

[0071] Specifically, the correction function 413 corrects the shape of the long-length imaging display frame using the SID and the rotation angle in each of the multiple imaging operations in the long-length imaging. This correction is realized by known geometric calculations based on the relative positional relationship between the tube focus and the X-ray detector 13, so a description thereof will be omitted. The retention processing circuit 41 that realizes the correction function 413 corresponds to the correction unit.

[0072] In addition, the processes realized by the setting function 411 and the correction function 413 have been described as being executed by the retention processing circuit 41, but are not limited to this. For example, the processes realized by the setting function 411 and the correction function 413 may be executed by the operation panel 33 or the processing circuit 24.

[0073] The processing circuitry 24 calculates the number of shots, the second position and orientation information, the aperture opening, and the number of shots based on the first position and orientation information and the size of the entire range of long length imaging, using the calculation function 241. Specifically, the calculation function 241 calculates the second position and orientation information, the aperture opening in long length imaging, and the number of shots, using the entire range of long length imaging set on the subject image, the size of the subject image, and the relationship between the distance (SID) from the X-ray tube 31 to the X-ray detector 13 that detects X-rays.

[0074] That is, the processing circuitry 24 converts the entire range of the long length imaging set on the subject image into the vertical distance and position in the long length imaging from the relationship between the size of the subject image and the SID, using the calculation function 241. The calculation function 241 calculates the number of images to be captured and the second position and orientation information using the vertical distance in the long length imaging and the length of the X-ray detector 13. In addition, the calculation function 241 calculates the aperture opening of the X-ray aperture 32 for each of the multiple images in the long length imaging, using the second position and orientation information and the SID. The above calculation is performed by known geometric calculation, so detailed explanation will be omitted.

[0075] The processing circuitry 24 calculates the body thickness and / or physique of the subject P based on the subject image using the calculation function 241. For example, the calculation function 241 calculates the body thickness and / or physique of the subject P using a known method based on image recognition processing (e.g., a trained model for image recognition) on the subject image or an output result from a depth camera related to the subject image. Note that, in calculating the body thickness and / or physique of the subject P, subject information such as the height and weight of the subject P written in the examination order may be used. Also, the subject information may be acquired from a hospital information system (HIS) via a network.

[0076] Furthermore, the processing circuit 24 uses the calculation function 241 to calculate the distance (SID) between the X-ray detector 13 that detects X-rays and the X-ray tube holding device 12 based on the position of the X-ray tube holding device 12. The calculation function 241 determines whether or not the subject image includes a target region for long-length imaging. For example, before setting the entire range of long-length imaging, the calculation function 241 applies image recognition processing to the subject image to determine whether or not the subject image includes a target region for long-length imaging. If it is determined that the subject image does not include a target region for long-length imaging, the controller 17 controls the X-ray tube moving device 15 to lengthen the SID until the subject image includes the target region for long-length imaging.

[0077] The processing circuitry 24 determines the X-ray conditions for long-length imaging based on the body thickness and / or the physique of the subject P calculated by the determination function 243. For example, the determination function 243 optimizes and determines the X-ray conditions for each of the multiple imaging in the long-length imaging using the body thickness and / or the physique of the subject P, the imaging target part, the number of images, X-ray tube OLP (Over Load Protection) management, etc. The X-ray conditions are, for example, tube voltage, tube aneurysm, tube current time product, and filter selection. Since a known method can be applied to optimize the X-ray conditions, a description thereof will be omitted. The processing circuitry 24 that realizes the determination function 243 corresponds to the determination unit. The processing realized by the calculation function 241 and the determination function 243 has been described as being executed by the processing circuitry 24, but is not limited thereto. For example, the processing realized by the calculation function 241 and the determination function 243 may be executed by the storage processing circuitry 41 or the operation panel 33.

[0078] The overall configuration of the X-ray diagnostic apparatus 2 according to the second embodiment has been described above. With such a configuration, the X-ray diagnostic apparatus 2 according to the second embodiment executes long-length imaging processing. Below, the procedure of the long-length imaging processing of the second embodiment will be described with reference to Figs. 6 and 7. Fig. 6 is a flowchart showing an example of the procedure of the long-length imaging processing according to the second embodiment. Fig. 7 is a diagram showing an example of the outline of the long-length imaging processing. Hereinafter, for the sake of concrete explanation, the long-length imaging processing will be described as being performed by a rotation method. Note that the long-length imaging processing is not limited to the rotation method, and may be realized by other methods such as a stepping method or a slot scan.

[0079] (Long-length photography processing) (Step S601) The long length imaging mode is selected by an instruction from the operator via the operation panel 33 or the input interface 21. Next, the subject P is placed on the stand 11.

[0080] (Step S602) The X-ray tube holding device 12 is moved in front of the stand 11. The movement HAM of the X-ray tube holding device 12 is performed by an operator OP holding the X-ray tube holding device 12, for example, as shown in S602A of Fig. 7. Note that the position of the X-ray tube holding device 12 in the horizontal plane may be set by a locking mechanism that locks the X-ray tube holding device 12 at a preset position for long-length imaging.

[0081] Furthermore, the movement of the X-ray tube holding device 12 may be performed by the operation of the X-ray tube moving device 15 under the control of the controller 17, in response to an instruction from the operator via the operation panel 33 or the input interface 21. When the X-ray tube holding device 12 is moved in front of the stand 11, the irradiation port AP is directed toward the stand 11 by the operator. The rotation HAR of the irradiation port (opening) AP is performed by the operator OP holding the X-ray tube holding device 12, for example, as shown in S602B in FIG. 7.

[0082] (Step S603) The optical camera 37 captures an image of the subject P to generate a subject image PI. As shown in 602B of FIG. 7, the subject P is captured over a range wider than the X-ray exposure range. The monitor 39 displays the subject image PI. As shown in 602B of FIG. 7, the captured subject image PI is displayed on the monitor 39. As a result, the presentation unit (optical camera 37 and monitor 39) presents the subject image PI including the entire range of the long-length imaging to the operator OP.

[0083] (Step S604) The long imaging range is specified by an operator's instruction on the monitor 39. S604 in Fig. 7 shows the specification of the long imaging range LIR by a drag operation on the monitor 39.

[0084] (Step S605) When an operation to complete the setting of the range of long-length imaging is input (Yes in step S605), the process of step S606 is performed. The operation to complete the setting of the range of long-length imaging is, for example, pressing a positioning completion button provided on the monitor 39 and / or the operation panel 33. In response to pressing the positioning completion button, the X-ray tube holding device 12 outputs the first position and orientation information and the aperture of the diaphragm to the processing circuit 24. Of the first position and orientation information, the position in the horizontal plane may be acquired by a lock mechanism. In addition, the first position and orientation information may be acquired by an encoder provided on the motor in the X-ray tube moving device 15. Pressing the positioning completion button is shown in S605 of FIG. 7. If the positioning completion button is not pressed (No in step S605), the process of step S604 is repeated.

[0085] (Step S606) The processing circuitry 24 uses the entire range of the long length imaging set in the subject image PI, the SID, and the first position and orientation information to calculate the size (position, vertical and horizontal width, etc.) of the entire range of the long length imaging. The calculation function 241 also calculates the number of images in the long length imaging based on the size of the long length imaging and the size of the X-ray detection surface of the X-ray detector 13. The calculation function 241 calculates second position and orientation information and the aperture opening for each of the multiple images in the long length imaging using the size of the entire range of the long length imaging, the first position and orientation information, and the number of images.

[0086] Since the long length imaging in this embodiment is a rotation type, the second position and orientation information corresponds to the rotation angle of the X-ray tube holding device 12 in each of the multiple imaging operations. Furthermore, the calculation function 241 may calculate the X-ray conditions, the driving conditions of the FPD, the timing of exposure, the moving speed of the X-ray detector 13, the operating speed of the X-ray tube holding device 12, and the like in each of the multiple imaging operations of the long length imaging, based on the size of the entire range of the long length imaging, the size of the subject image PI, the SID, and the second position and orientation information. From the above, the calculation function 241 calculates the long length imaging parameters.

[0087] (Step S607) The controller 17 moves the X-ray detector 13 to the imaging position for the first image in the long-length imaging based on the second position and orientation information. As a result, the controller 17 operates the X-ray tube holding device 12 based on the second position and orientation information in accordance with the determination of the entire range of the long-length imaging. In addition, the controller 17 controls the optical camera 37 to image the subject P. As a result, the optical camera 37 generates a subject image PI for the imaging position for the first image in the long-length imaging. At this time, the holding processing circuit 41 corrects the shape of the long-length imaging display frame using the SID and the rotation angle by the correction function 413.

[0088] (Step S608) The monitor 39 displays the corrected long imaging display frame superimposed on the subject image PI. The controller 17 also rotates the X-ray tube 31 toward the moved X-ray detector 13. As a result, the controller 17 operates the X-ray tube holding device 12 based on the second position and orientation information in response to the determination of the entire range of long imaging, and executes preparation for driving the X-ray detector 13 based on the number of images to be captured. Various controls by the controller 17 are similar to the processing contents described in step S207 in the first embodiment, and therefore description thereof will be omitted. The monitor 39 also displays the subject image PI on which the corrected long imaging display frame is superimposed, as shown in S607 of FIG. 7.

[0089] (Step S609) The controller 17 executes long-length imaging of the subject P using the calculated imaging parameters in response to pressing of an imaging switch on the monitor 39, the operation panel 33, or the input interface 21. S608 in Fig. 7 shows a schematic diagram of long-length imaging of the subject P. As shown in S608 in Fig. 7, when the number of images to be captured in long-length imaging is three, the controller 17 moves the X-ray detector 13 three times in the vertical direction. At this time, the controller 17 rotates the X-ray tube holding device 12 (XR) in accordance with the movement IDM of the X-ray detector 13.

[0090] (Step S610) When the long-length imaging is completed, the controller 17 moves the X-ray detector 13 to the imaging position for the first image, and controls the optical camera 37 to image the subject P. The processing content in this step is similar to that in step S607, and therefore a description thereof will be omitted.

[0091] (Step S611) The monitor 39 displays the corrected long imaging display frame superimposed on the subject image PI. The controller 17 also rotates the X-ray tube 31 to face the moved X-ray detector 13. The processing content in this step is similar to that in step S608, and therefore the description will be omitted.

[0092] (Step S612) If there is reshooting of the long length photographing (Yes in step S612), the process from step S609 onwards is repeated. If there is no reshooting of the long length photographing (No in step S612), the process of step S613 is executed. For example, the controller 17 determines whether or not there is reshooting, based on whether or not the reshoot button on the operation panel 33 or the input interface 21 has been pressed.

[0093] (Step S613) If there is next long length imaging for the subject P (Yes in step S613), the process of step S614 is executed. If there is no next long length imaging for the subject P (No in step S2613), the long length imaging for the subject P is completed. For example, the controller 17 determines whether there is next long length imaging based on the description of the examination order and / or imaging protocol for the subject P.

[0094] (Step S614) The controller 17 controls the X-ray tube moving device 15 to move the X-ray tube holding device 12 according to the region of the next long-length imaging described in the examination order and / or the imaging protocol. The controller 17 also controls the X-ray aperture 32 to change the aperture opening according to the region of the next long-length imaging. The processing content in this step is similar to the processing content described in step S212 in the first embodiment, and therefore a description thereof will be omitted.

[0095] (Step S615) The optical camera 37 captures an image of the subject P under the control of the controller 17, and generates a subject image PI. The storage processing circuit 41 uses the setting function 411 to specify a region to be imaged from an examination order for long-length imaging of the subject P. Next, the setting function 411 specifies a region to be imaged in the subject image PI using known image processing such as segmentation processing and image recognition processing on the subject image PI. Next, the setting function 411 sets a long-length imaging display frame in the subject image PI according to the specified region to be imaged. The monitor 39 displays the generated subject image PI with the set long-length imaging display frame superimposed thereon. After this step, the processing from step S605 onwards is repeated.

[0096] The X-ray diagnostic apparatus 2 according to the second embodiment described above sets the entire range of long-length photography for the subject image PI generated by photographing the subject P with the optical camera 37 capable of optically photographing the subject P, and displays the entire range of long-length photography superimposed on the subject image PI. As a result, according to the X-ray diagnostic apparatus 2 according to the second embodiment, the movement of the X-ray tube holding device 12 (position adjustment: step S204) in the first embodiment is not required in setting the entire range of long-length photography, and compared to the first embodiment, the workflow of long-length photography is further improved, the operator's efforts can be further reduced, and the efficiency of examination of the subject P can be further improved.

[0097] Moreover, the X-ray diagnostic apparatus 2 according to the second embodiment collects a subject image PI in each of a plurality of long length imaging, corrects the entire range of the long length imaging based on the second position and orientation information and the aperture opening, and displays the corrected entire range of the long length imaging in each of the plurality of long length imaging so as to be superimposed on the subject image PI. Thus, according to the X-ray diagnostic apparatus 2 according to the second embodiment, the operator can easily grasp the entire range of the long length imaging of the subject P in each of the plurality of long length imaging.

[0098] Furthermore, the X-ray diagnostic apparatus 2 according to the second embodiment sets the entire range of long length imaging in the subject image PI based on the subject image PI and the imaging target part in long length imaging. As a result, the X-ray diagnostic apparatus 2 according to the second embodiment can present the entire range of long length imaging to the operator in advance, and the operator can more easily set the entire range of long length imaging.

[0099] Furthermore, the X-ray diagnostic apparatus 2 according to the second embodiment calculates the second position and orientation information, the aperture opening, and the number of images to be captured, using the entire range of long-length imaging, the size of the subject image PI, and the relationship between the distance (SID) from the X-ray tube 31 to the X-ray detector 13 that detects X-rays. As a result, the X-ray diagnostic apparatus 2 according to the second embodiment can set imaging parameters for long-length imaging by setting the entire range of long-length imaging on the monitor 39. Therefore, the X-ray diagnostic apparatus 2 according to the second embodiment can reduce the operator's efforts and improve the efficiency of examination of the subject P by improving the workflow of long-length imaging.

[0100] Furthermore, the X-ray diagnostic apparatus 2 according to the second embodiment calculates the body thickness and / or physique of the subject P based on the subject image PI, and determines the X-ray conditions for long-length imaging based on the calculated body thickness and / or physique. As a result, the X-ray diagnostic apparatus 2 according to the second embodiment can optimize the X-ray conditions for each of a plurality of images in long-length imaging, reduce radiation exposure to the subject P, and generate a long-length image suitable for diagnosis.

[0101] Furthermore, the X-ray diagnostic apparatus 2 according to the second embodiment calculates the distance (SID) between the X-ray detector 13 and the X-ray tube holding device 12 based on the position of the X-ray tube holding device 12, and when the subject image PI does not include the imaging target part for long-length imaging, controls the X-ray tube moving device 15 to increase the distance (SID) until the subject image PI includes the imaging target part. As a result, the X-ray diagnostic apparatus 2 according to the second embodiment can automatically move the X-ray tube moving device 15 without an instruction from the operator so that the entire range of long-length imaging is included in the subject image PI. As a result, the X-ray diagnostic apparatus 2 according to the second embodiment can reduce the operator's effort in setting the entire range of long-length imaging, and can improve the efficiency of examination of the subject P.

[0102] When the technical idea of ​​this embodiment is realized by an X-ray imaging control method, the X-ray imaging control method uses an X-ray tube holding device 12 that holds an X-ray tube 31 that generates X-rays and an X-ray aperture 32 that collimates X-rays to present the entire range of long-length imaging for the subject P to an operator, and calculates the number of images in the long-length imaging, second position and orientation information regarding the position and orientation of the X-ray tube 31 in each of the multiple images in the long-length imaging, and the aperture opening of the X-ray aperture 32 in each of the multiple images based on the first position and orientation information regarding the position and orientation of the X-ray tube 31 when the entire range of the long-length imaging is presented and the size of the entire range of the long-length imaging, and controls multiple images for the long-length imaging using the second position and orientation information, the aperture opening, and the number of images. The processing procedure realized by the X-ray imaging control method corresponds to the procedure of the long-length imaging process, so a description thereof will be omitted. In addition, the effect of the X-ray imaging control method is similar to that of the first embodiment, so a description thereof will be omitted.

[0103] When the technical idea of ​​the embodiment is realized by an X-ray imaging control program, the X-ray imaging control program causes a computer to use an X-ray tube holding device 12 that holds an X-ray tube 31 that generates X-rays and an X-ray aperture 32 that collimates the X-rays to present the entire range of long-length imaging for a subject P to an operator, and calculate the number of images in the long-length imaging, second position and orientation information regarding the position and orientation of the X-ray tube 31 in each of the multiple images in the long-length imaging, and the aperture opening of the X-ray aperture 32 in each of the multiple images, based on first position and orientation information regarding the position and orientation of the X-ray tube 31 at the time the entire range of long-length imaging is presented and the size of the entire range of the long-length imaging, and control the multiple images for the long-length imaging using the second position and orientation information, the aperture opening, and the number of images.

[0104] For example, long-length imaging processing can be realized by installing an X-ray imaging control program in a computer in an X-ray diagnostic device or the like and expanding the program in memory. In this case, a program that can cause a computer to execute the X-ray imaging control program can be stored in a storage medium such as a magnetic disk (hard disk, etc.), an optical disk (CD-ROM, DVD, etc.), or a semiconductor memory and distributed. The processing procedure and effects in the X-ray imaging control are the same as those in the first embodiment, so a description thereof will be omitted.

[0105] According to at least the embodiment and the like described above, it is possible to improve the workflow in multi-shot long length photography.

[0106] Although some embodiments have been described, these embodiments are presented as examples and are not intended to limit the scope of the invention. These embodiments can be implemented in various other forms, and various omissions, substitutions, modifications, and combinations of embodiments can be made without departing from the spirit of the invention. These embodiments and their modifications are included in the scope of the invention and its equivalents as described in the claims, as well as in the scope and spirit of the invention.

[0107] Regarding the above-described embodiments, the following supplementary notes are disclosed as one aspect and optional features of the invention. (Appendix 1) an X-ray tube holder that holds an X-ray tube that generates X-rays and an X-ray aperture that collimates the X-rays; a presentation unit provided in the X-ray tube holding unit and presenting to an operator an entire range of long-length photography of a subject; a calculation unit that calculates the number of images in the long length photography, second position and orientation information related to the position and orientation of the X-ray tube in each of the multiple images in the long length photography, and an aperture opening of the X-ray aperture in each of the multiple images, based on first position and orientation information related to the position and orientation of the X-ray tube at the time of presentation of the entire range and the size of the entire range; a control unit that controls the plurality of photographing operations related to the long length photographing operation by using the second position and orientation information, the opening degree, and the number of photographed images; An X-ray diagnostic device comprising: (Appendix 2) The presentation unit may present the entire range to the operator by irradiating the subject with visible light. (Appendix 3) the X-ray aperture device is capable of opening the aperture to a larger degree than the maximum aperture during the X-ray imaging when presenting the entire range to the operator, The presentation unit may present the entire range to the operator by irradiating the subject with the visible light in an irradiation range linked to an aperture opening of the X-ray aperture device. (Appendix 4) The presentation unit is an optical camera capable of optically photographing the subject; a setting unit capable of setting the entire range for a subject image generated by photographing the subject with the optical camera; a monitor that displays the entire range on the subject image; having It may be mounted on the X-ray tube holder. (Appendix 5) The optical camera collects the subject image in each of the plurality of long-length photographing operations, the presentation unit further includes a correction unit that corrects the entire range based on the second position and orientation information and the opening degree, The monitor may display the corrected entire range in each of the multiple long length imaging operations so as to be superimposed on the subject image. (Appendix 6) In response to the determination of the entire range, the control unit: operating the X-ray tube holding unit based on the second position and orientation information; Preparation for driving an X-ray detector that detects the X-rays may be performed based on the number of captured images. (Appendix 7) The control unit may control the X-ray tube holding unit to rotate the orientation of the irradiation port of the X-ray tube along the long axis direction of the long-length imaging, or to continuously irradiate the subject with X-rays collimated onto a slit by the X-ray aperture. (Appendix 8) The setting unit may set the entire range in the subject image based on the subject image and a target region to be imaged in the long length imaging. (Appendix 9) The calculation unit may calculate the second position and orientation information, the opening, and the number of images to be captured using the entire range, a relationship between a size of the subject image, and a distance from the X-ray tube to an X-ray detector that detects the X-rays. (Appendix 10) the calculation unit calculates a body thickness and / or a physique of the subject based on the subject image; The apparatus may further include a determination unit that determines X-ray conditions for the long length imaging based on the body thickness and / or the body build. (Appendix 11) an X-ray tube moving device that movably supports the X-ray tube holding unit; the calculation unit calculates a distance between an X-ray detector that detects the X-rays and the X-ray tube holder based on a position of the X-ray tube holder; When the subject image does not include a region to be imaged for the long-length imaging, the control unit may control the X-ray tube movement device to increase the distance until the region to be imaged is included in the subject image. (Appendix 12) The control unit based on a next imaging target part for a next long-length imaging following the long-length imaging and the second position and orientation information, a next position of the X-ray tube holding part corresponding to the next imaging target part and a next opening degree of the aperture in the X-ray aperture device are set; After the long-length imaging is performed, the X-ray tube holder is moved to the next position set. After the long length imaging is performed, the opening degree of the X-ray aperture may be adjusted to the next opening degree that has been set. (Appendix 13) presenting to the operator the entire range of long-length photography of the subject using an X-ray tube holder that holds an X-ray tube that generates X-rays and an X-ray aperture that collimates the X-rays; calculating the number of images in the long length photography, second position and orientation information relating to the position and orientation of the X-ray tube in each of the plurality of images in the long length photography, and an aperture opening of the X-ray aperture device in each of the plurality of images based on first position and orientation information relating to the position and orientation of the X-ray tube at the time of presentation of the entire range and a size of the entire range; controlling the plurality of photographing operations related to the long length photographing using the second position and orientation information, the opening degree, and the number of photographs; The X-ray photography control method includes: (Appendix 14) On the computer, presenting to the operator the entire range of long-length photography of the subject using an X-ray tube holder that holds an X-ray tube that generates X-rays and an X-ray aperture that collimates the X-rays; calculating the number of images in the long length photography, second position and orientation information relating to the position and orientation of the X-ray tube in each of the plurality of images in the long length photography, and an aperture opening of the X-ray aperture device in each of the plurality of images based on first position and orientation information relating to the position and orientation of the X-ray tube at the time of presentation of the entire range and a size of the entire range; controlling the plurality of photographing operations related to the long length photographing using the second position and orientation information, the opening degree, and the number of photographs; X-ray photography control program that realizes this. [Explanation of symbols]

[0108] 1 X-ray diagnostic device (first embodiment) 2 X-ray diagnostic device (second embodiment) 10. Imaging Device 11 Stand 12 X-ray tube holding device 13 X-ray detector 14 High voltage power supply 15 X-ray tube moving device 16 Detector moving device 17 Controller 20 Console 21 Input Interface 22 Display 23 Memory circuit 24 Processing circuit 31 X-ray tube 32 X-ray squeezer 33 Operation Panel 34 Field Lamp 35 Mirror 37 Optical Camera 39 Monitor 41 Retention processing circuit 241 Calculation Function 243 Decision Function 411 Setting Function 413 Correction Function

Claims

1. an X-ray tube holder that holds an X-ray tube that generates X-rays and an X-ray aperture that collimates the X-rays; a presentation unit provided in the X-ray tube holding unit and configured to present to an operator an entire range of long-length photography of a subject; a calculation unit that calculates the number of images in the long length photography, second position and orientation information related to the position and orientation of the X-ray tube in each of the plurality of images in the long length photography, and an aperture opening degree of the X-ray aperture in each of the plurality of images, based on first position and orientation information related to the position and orientation of the X-ray tube at the time of presentation of the entire range and a size of the entire range; a control unit that controls the plurality of photographing operations related to the long length photographing operation using the second position and orientation information, the opening degree, and the number of photographed images; An X-ray diagnostic apparatus comprising:

2. The presentation unit presents the entire range to the operator by irradiating the subject with visible light.

2. The X-ray diagnostic apparatus according to claim 1.

3. the X-ray aperture device is capable of opening the aperture to a larger degree than the maximum aperture during the X-ray imaging when presenting the entire range to the operator, the presentation unit presents the entire range to the operator by irradiating the subject with the visible light within an irradiation range linked to an aperture opening of the X-ray aperture device.

3. The X-ray diagnostic apparatus according to claim 2.

4. The presentation unit is an optical camera capable of optically photographing the subject; a setting unit capable of setting the entire range for a subject image generated by photographing the subject with the optical camera; a monitor that displays the entire range on the subject image; having Mounted on the X-ray tube holding part, 2. The X-ray diagnostic apparatus according to claim 1.

5. The optical camera collects the subject image in each of the plurality of long-length photographing operations, the presentation unit further includes a correction unit that corrects the entire range based on the second position and orientation information and the opening degree, the monitor displays the corrected entire range in each of the plurality of long length photographys so as to be superimposed on the subject image.

5. The X-ray diagnostic apparatus according to claim 4.

6. In response to the determination of the entire range, the control unit: operating the X-ray tube holding unit based on the second position and orientation information; preparation for driving an X-ray detector for detecting the X-rays is performed based on the number of images captured; 6. An X-ray diagnostic apparatus according to claim 1.

7. the control unit controls the X-ray tube holding unit to rotate the direction of the irradiation port of the X-ray tube along the long axis direction of the long length imaging, or to continuously irradiate the subject with X-rays collimated onto a slit by the X-ray aperture.

6. An X-ray diagnostic apparatus according to claim 1.

8. the setting unit sets the entire range in the subject image based on the subject image and a target region to be imaged in the long length imaging.

5. The X-ray diagnostic apparatus according to claim 4.

9. the calculation unit calculates the second position and orientation information, the opening degree, and the number of images to be captured by using the entire range, a relationship between a size of the subject image, and a distance from the X-ray tube to an X-ray detector that detects the X-rays.

5. The X-ray diagnostic apparatus according to claim 4.

10. The calculation unit calculates a body thickness and / or a physique of the subject based on the subject image, a determination unit that determines X-ray conditions for the long-length imaging based on the body thickness and / or the body build, 5. The X-ray diagnostic apparatus according to claim 4.

11. an X-ray tube moving device that movably supports the X-ray tube holding unit, the calculation unit calculates a distance between an X-ray detector that detects the X-rays and the X-ray tube holding unit based on a position of the X-ray tube holding unit; When the subject image does not include a region to be imaged for the long-length imaging, the control unit controls the X-ray tube moving device to increase the distance until the region to be imaged is included in the subject image.

5. The X-ray diagnostic apparatus according to claim 4.

12. The control unit is based on a next imaging target part for a next long-length imaging following the long-length imaging and the second position and orientation information, a next position of the X-ray tube holding part corresponding to the next imaging target part and a next opening degree of the aperture in the X-ray aperture device are set; After the long-length imaging is performed, the X-ray tube holder is moved to the next position set. After the long-length imaging is performed, the opening degree of the X-ray aperture is adjusted to the next opening degree set.

2. The X-ray diagnostic apparatus according to claim 1.

13. presenting to an operator the entire range of long-length photography of the subject using an X-ray tube holder that holds an X-ray tube that generates X-rays and an X-ray aperture that collimates the X-rays; calculating a number of images in the long length photography, second position and orientation information related to the position and orientation of the X-ray tube in each of the plurality of images in the long length photography, and an aperture opening degree of the X-ray aperture device in each of the plurality of images based on first position and orientation information related to the position and orientation of the X-ray tube at the time of presentation of the entire range and a size of the entire range; controlling the plurality of photographing operations related to the long length photographing using the second position and orientation information, the opening degree, and the number of photographs; An X-ray photography control method comprising:

14. On the computer, presenting to an operator the entire range of long-length photography of the subject using an X-ray tube holder that holds an X-ray tube that generates X-rays and an X-ray aperture that collimates the X-rays; calculating a number of images in the long length photography, second position and orientation information related to the position and orientation of the X-ray tube in each of the plurality of images in the long length photography, and an aperture opening degree of the X-ray aperture device in each of the plurality of images based on first position and orientation information related to the position and orientation of the X-ray tube at the time of presentation of the entire range and a size of the entire range; controlling the plurality of photographing operations related to the long length photographing using the second position and orientation information, the opening degree, and the number of photographs; X-ray photography control program that realizes this.

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