X-ray diagnostic equipment and X-ray diagnostic system

Abstract

To enable efficient and precise compression of the desired area for compression imaging. [Solution] The X-ray diagnostic apparatus according to the embodiment includes: an identification unit that identifies a region of interest from an X-ray image collected from a subject; a determination unit that determines a compression region of a compression member that compresses the subject by expanding, corresponding to the region of interest; and a control unit that expands the compression region of the compression member.

Description

[Technical Field]

[0001] The embodiments disclosed in the present specification and drawings relate to an X-ray diagnostic apparatus and an X-ray diagnostic system. [Background Art]

[0002] Conventionally, in the medical field, X-ray diagnostic apparatuses that collect X-ray images by irradiating a subject with X-rays and detecting the X-rays transmitted through the subject have been widely used. When acquiring an X-ray image using this X-ray diagnostic apparatus, a user such as a doctor or a technician acquires a fluoroscopic image through fluoroscopy that continuously irradiates X-rays, and while observing the acquired fluoroscopic image, determines the X-ray imaging position and X-ray imaging region for the subject, and acquires a captured image which is a single X-ray image.

[0003] In anterior wall imaging for upper gastrointestinal tract examinations performed with such an X-ray diagnostic apparatus, compression imaging may be performed by inserting a pillow between the examination table and the subject's abdomen while the subject is in a prone position. However, when performing compression imaging, the user has to travel back and forth between the operation room and the imaging room many times to insert and remove the pillow. In addition, although the user originally intends to insert the pillow at the position of the stomach in the abdomen, the accurate position cannot be determined only from the body surface of the subject. Therefore, it is desired to enable compression imaging by efficiently and accurately compressing the region to be compressed. [Prior Art Documents] [Patent Documents]

[0004] [Patent Document 1] Japanese Unexamined Patent Publication No. 2015-173895 [Summary of the Invention] [Problem to be Solved by the Invention]

[0005] One of the problems that the embodiments disclosed herein and in the drawings aim to solve is to enable efficient and accurate compression of a subject's desired area for compression imaging. However, the problems that the embodiments disclosed herein and in the drawings aim to solve are not limited to the above problem. Problems corresponding to the effects of each configuration shown in the embodiments described later can also be positioned as other problems. [Means for solving the problem]

[0006] The X-ray diagnostic apparatus according to this embodiment includes: an identification unit that identifies a region of interest from X-ray images collected from a subject; a determination unit that determines a compression region of a compression member that compresses the subject by expanding, corresponding to the region of interest; and a control unit that expands the compression region of the compression member. [Brief explanation of the drawing]

[0007] [Figure 1] This is a block diagram showing an example of the configuration of an X-ray diagnostic apparatus according to this embodiment. [Figure 2] Figure 1 is a perspective view illustrating an example of the configuration of the imaging device in an X-ray diagnostic apparatus. [Figure 3] This diagram illustrates the state of a subject when undergoing an anterior wall X-ray imaging of the upper gastrointestinal tract in the imaging apparatus of the X-ray diagnostic device according to this embodiment. [Figure 4] This figure schematically illustrates the structure of a compression member additionally inserted between the examination table and the patient in the X-ray diagnostic apparatus according to this embodiment. [Figure 5] This is a schematic diagram showing a partially enlarged cross-sectional view of the compression member shown in Figure 4. [Figure 6] This diagram shows a flowchart illustrating the contents of the imaging preparation control process performed by the X-ray diagnostic apparatus according to this embodiment. [Figure 7] This figure shows an example of the correspondence between the region of interest identified on the display screen and the block of the compression member in the X-ray diagnostic apparatus according to this embodiment. [Figure 8]This figure shows a modified example of the region of interest identification screen shown in Figure 7. [Figure 9] This figure shows a flowchart illustrating the contents of the shooting execution control process, which is executed after the shooting preparation control process shown in Figure 6 is completed. [Modes for carrying out the invention]

[0008] Embodiments of the X-ray diagnostic apparatus and X-ray diagnostic system will be described below with reference to the drawings. In the following description, components having substantially the same function and configuration will be denoted by the same reference numeral, and redundant explanations will be given only when necessary.

[0009] Figure 1 is a block diagram showing an example configuration of an X-ray diagnostic apparatus 1 according to one embodiment, and Figure 2 is a perspective view illustrating an example configuration of the imaging apparatus 10 in the X-ray diagnostic apparatus 1 shown in Figure 1. The X-ray diagnostic apparatus 1 shown in Figures 1 and 2 is, for example, an X-ray TV bed apparatus. However, the X-ray diagnostic apparatus 1 according to this embodiment is not limited to an X-ray TV bed apparatus, and can be realized as any type of X-ray diagnostic apparatus, such as an X-ray angiography apparatus or a general X-ray imaging apparatus. In the following description, an example in which the X-ray diagnostic apparatus 1 is an X-ray TV bed apparatus will be described.

[0010] As shown in Figures 1 and 2, the X-ray diagnostic apparatus 1 according to this embodiment is configured to include an imaging device 10 and a console device 30.

[0011] The imaging device 10 irradiates the subject P with X-rays, acquires an image by X-ray imaging, and acquires a fluoroscopic image by fluoroscopy. Note that the imaging device 10 is an example of an imaging unit.

[0012] X-ray imaging is a method of imaging in which a single X-ray image is obtained by irradiating a subject P with discontinuous X-rays. In other words, X-ray imaging is used when a single image is obtained by irradiating the subject P with X-rays once at a relatively high tube current. However, X-ray imaging is not limited to obtaining a single image; it can also be used to obtain a continuous series of X-ray images over time by irradiating the subject P with X-rays continuously at a relatively high tube current, i.e., it can be used for video recording. Compared to fluoroscopy, X-ray imaging can obtain X-ray images with higher resolution.

[0013] Fluoroscopy is a method of imaging in which a subject P is continuously or intermittently irradiated with X-rays to acquire a series of X-ray images as fluoroscopic images. In other words, fluoroscopy is used to acquire multiple fluoroscopic images that are continuous in time at a preset frame rate by irradiating the subject P with X-rays continuously or intermittently at a relatively low tube current. Fluoroscopy is used, for example, for video recording. Compared to video recording using X-ray imaging, fluoroscopy can reduce the radiation dose to the subject P. Also, compared to video recording using X-ray imaging, fluoroscopy can reduce the amount of data for video recording per unit of time because it irradiates the subject P with continuous X-rays at a relatively low tube current. Fluoroscopy is broadly classified into continuous fluoroscopy and pulsed fluoroscopy. Continuous fluoroscopy is fluoroscopy in which X-rays are continuously irradiated, while pulsed fluoroscopy is fluoroscopy in which X-ray pulses are repeatedly and intermittently irradiated. Pulsed fluoroscopy, compared to continuous fluoroscopy, has a slightly lower frame rate for fluoroscopic images, but it can reduce the radiation dose to the subject. In the following, unless distinguished from continuous fluoroscopy, both will simply be referred to as fluoroscopy. Furthermore, fluoroscopy may be performed in a way that acquires one fluoroscopic image from the subject P with a single X-ray exposure.

[0014] Furthermore, in the present embodiment, if necessary, both the captured image acquired by X-ray radiography and the fluoroscopic image acquired by fluoroscopic imaging are collectively referred to as an X-ray image. That is, in the present embodiment, both the captured image acquired by X-ray radiography and the fluoroscopic image acquired by fluoroscopic imaging are types of X-ray images.

[0015] Furthermore, the imaging apparatus 10 is configured to include an X-ray irradiation unit 101, a high-voltage apparatus 103, an X-ray detector 105, and a bed 107.

[0016] The X-ray irradiation unit 101 irradiates a subject P with X-rays. Specifically, the X-ray irradiation unit 101 includes an X-ray tube 1011 that generates X-rays, an X-ray aperture 1013 having a function of limiting the X-ray irradiation field and attenuating X-rays in a part of the irradiation field, and an optical image acquisition unit 1014 that acquires an optical image obtained by imaging the subject P.

[0017] The X-ray tube 1011 is a vacuum tube including a cathode (filament) that generates thermoelectrons and an anode (target) that generates X-rays upon being bombarded with thermoelectrons. The X-ray tube 1011 generates X-rays by irradiating thermoelectrons from the cathode toward the anode using a high voltage supplied from the high-voltage apparatus 103. For example, the X-ray tube 1011 includes a rotating anode type X-ray tube that generates X-rays by irradiating thermoelectrons to a rotating anode.

[0018] The X-ray aperture 1013 is formed of a metal plate such as a lead plate. The X-ray aperture 1013 restricts X-rays generated by the X-ray tube 1011 and controls the range of X-rays irradiated to the subject P. That is, narrowing the aperture of the X-ray aperture 1013 can reduce the X-ray irradiation range, and conversely, opening the aperture of the X-ray aperture 1013 can widen the X-ray irradiation range. Note that the X-ray aperture 1013 may also be referred to as a collimator.

[0019] The optical image acquisition unit 1014 is configured by a so-called optical camera, and optically images the subject P. In the present embodiment, an optical image acquisition unit 1014 is provided in the X-ray irradiation unit 101 located above the subject P, but the position where the optical image acquisition unit 1014 is provided is not limited thereto, and may be provided at any position. For example, the optical image acquisition unit 1014 can also be provided on the ceiling of an imaging room where the X-ray diagnostic apparatus 1 is installed. This optical image acquisition unit 1014 corresponds to the acquisition unit in the present embodiment.

[0020] The high-voltage device 103 supplies high voltage to the X-ray tube 1011 of the X-ray irradiation unit 101 under the control of a processing circuit of the console device 30. For example, the high-voltage device 103 has an electric circuit such as a transformer and a rectifier, and includes a high-voltage generator that generates high voltage to be applied to the X-ray tube 1011, and an X-ray controller that controls an output voltage corresponding to the X-ray irradiated by the X-ray tube 1011. Note that the high-voltage generator may be of a transformer type or an inverter type.

[0021] The X-ray detector 105 is, for example, an X-ray flat panel detector (FPD) having detection elements arranged in a matrix. The X-ray detector 105 detects X-rays irradiated from the X-ray irradiation unit 101 and transmitted through the subject P, and outputs a detection signal corresponding to the detected X-ray dose to the processing circuit of the console device 30. Note that the X-ray detector 105 may be an indirect conversion detector having a grid, a scintillator array, and a photosensor array, or a direct conversion detector having a semiconductor element that converts incident X-rays into electrical signals.

[0022] The bed 107 is a bed on which the subject P is placed. X-ray imaging and / or fluoroscopic imaging is performed with the subject P lying on the top plate of the bed 107. For this reason, the X-ray detector 105 is located under the bed 107.

[0023] A compression member 50, which compresses the subject P by expanding, is placed on the top of the bed 107. That is, the compression member 50 is placed between the bed 107 and the subject P. The compression member 50 is composed of multiple blocks that can be individually expanded. An expansion control device 52 is connected to the compression member 50 to control the expansion of each block. Therefore, each of the multiple blocks of the compression member 50 can expand and contract individually under the control of the expansion control device 52. Note that the compression member 50 and the expansion control device 52 are elements that are added to the X-ray diagnostic apparatus 1 after the fact, and in this embodiment, they are not elements that constitute the X-ray diagnostic apparatus 1. When these compression member 50 and expansion control device 52 are added to the X-ray diagnostic apparatus 1 after the fact, they together constitute an X-ray diagnostic system.

[0024] The console device 30 comprises a processing circuit 301, a memory 303, a display 305, an input interface 307, and an output interface 309.

[0025] The processing circuit 301 is a control circuit that performs overall control of the X-ray diagnostic apparatus 1, and is also an arithmetic circuit that performs various calculations. For example, the processing circuit 301 according to this embodiment has an imaging control function 3011, a region of interest identification function 3012, a compression region determination function 3013, and a compression control function 3014. The imaging control function 3011 corresponds to the imaging control unit in this embodiment, the region of interest identification function 3012 corresponds to the identification unit in this embodiment, the compression region determination function 3013 corresponds to the determination unit in this embodiment, and the compression control function 3014 corresponds to the control unit in this embodiment.

[0026] In the embodiments shown in Figures 1 and 2, the processing functions performed by the imaging control function 3011, the region of interest identification function 3012, the compression region determination function 3013, and the compression control function 3014 are stored in memory 303 in the form of a program that can be executed by a computer. The processing circuit 301 is a processor that reads the program from memory 303 and executes it to realize the function corresponding to each program. In Figure 1, it is explained that the imaging control function 3011, the region of interest identification function 3012, the compression region determination function 3013, and the compression control function 3014 are realized by a single processing circuit 301, but it is also possible to configure the processing circuit 301 by combining multiple independent processors, and each processor executes a program to realize these functions.

[0027] The imaging control function 3011 controls the overall imaging timing of the X-ray diagnostic device 1 according to imaging conditions, and also controls each function. In this embodiment, the imaging control function 3011 performs X-ray imaging or fluoroscopy by receiving instruction input from the user to start X-ray imaging or fluoroscopy imaging via the input interface 307.

[0028] The region of interest identification function 3012 identifies a region of interest from X-ray images collected of the subject P. In this embodiment, the region of interest identification function 3012 identifies a region of interest in a fluoroscopic image, for example, based on a fluoroscopic image taken by fluoroscopy. In this case, the region of interest identification function 3012 identifies a region of interest based, for example, on a user's specification of a fluoroscopic image collected as an X-ray image.

[0029] The compression area determination function 3013 determines the compression area that compresses the subject P in relation to the region of interest among the compression members 50 that compress the subject P by expanding. More specifically, the compression area determination function 3013 determines one or more blocks corresponding to the region of interest as the compression area.

[0030] The compression control function 3014 inflates the compression region of the compression member 50, which is the area where the subject P should be compressed. More specifically, the compression control function 3014 outputs a control signal to the expansion control device 52 via the output interface 309, and the expansion control device 52 inflates one or more blocks determined to be the compression region based on this control signal.

[0031] Memory 303 is composed of, for example, semiconductor memory elements such as RAM (Random Access Memory) and flash memory, a hard disk, and an optical disc. Memory 303 may also be composed of portable media such as USB (Universal Serial Bus) memory and DVD (Digital Video Disk). Memory 303 stores various processing programs used in the processing circuit 301 (including application programs and OS (Operating System)), data necessary for program execution, and conditions for storing user-set perspective images in memory 303.

[0032] The display 305 displays various types of information. For example, the display 305 may display captured images or perspective images acquired by the imaging device 10, or it may display a GUI (Graphical User Interface) for receiving various input operations from the operator. For example, the display 305 may be an LCD (Liquid Crystal Display), a CRT (Cathode Ray Tube) display, or an organic EL (Electro Luminescence) display. Note that the display 305 corresponds to the display unit in this embodiment.

[0033] The input interface 307 receives various input operations from the user, converts the received input operations into electrical signals, and outputs them to the processing circuit 301. For example, the input interface 307 can be implemented by a trackball, switch buttons, mouse, keyboard, touchpad that performs input operations by touching the operating surface, and a touch panel display that integrates a display screen and a touchpad. The input interface 307 receives, for example, information about the subject P and the shooting conditions when photographing the subject P. Furthermore, the input interface 307 according to this embodiment has an X-ray shooting switch 3071 and a fluoroscopy shooting switch 3072. The input interface 307 may also be implemented by a two-stage switch that can be switched between a first switch that starts preparing for X-ray shooting and a second switch that starts X-ray shooting, depending on the amount the user presses. The input interface 307 corresponds to the input unit according to this embodiment.

[0034] The X-ray imaging switch 3071 is a switch for controlling whether or not to perform X-ray imaging, that is, whether or not to irradiate with X-rays, and may consist of, for example, a hand switch. X-ray imaging of the subject P is performed, for example, after the user presses the X-ray imaging switch 3071 until the X-ray imaging is completed based on the imaging conditions set by the user. The X-ray imaging switch 3071 may be provided on the imaging device 10.

[0035] Furthermore, the fluoroscopy switch 3072 is a switch for controlling whether or not to perform fluoroscopy, that is, whether or not to irradiate with X-rays, and is, for example, a foot switch. The fluoroscopy switch 3072 is located, for example, on the floor of the imaging room or control room where the X-ray diagnostic device 1 is installed. Fluoroscopy of the subject P is performed, for example, after the user presses the fluoroscopy switch 3072 until the pressed fluoroscopy switch 3072 is released by the user. The fluoroscopy switch 3072 may also be provided on the imaging device 10.

[0036] The output interface 309 outputs signals supplied from, for example, the processing circuit 301. This output interface 309 can be implemented by, for example, an indicator such as a lamp, an audio device such as a speaker that outputs sound, or a printing circuit such as a printer.

[0037] Figure 3 illustrates the state of subject P when undergoing anterior wall imaging in an upper gastrointestinal examination using the imaging device 10 of the X-ray diagnostic apparatus 1 according to this embodiment. As shown in Figure 3, in anterior wall imaging of the upper gastrointestinal examination performed by the X-ray diagnostic apparatus 1, subject P lies face down, that is, prone, on the examination table 107. In conventional techniques, a pillow or the like was inserted into the abdomen of subject P in this prone position to perform compression imaging. However, the process of inserting a pillow or the like into the abdomen is cumbersome for the user and lacks accuracy.

[0038] Therefore, in this embodiment, a compression member 50 is additionally inserted into the X-ray diagnostic apparatus 1 to compress the subject P. That is, the compression member 50 is inserted between the subject P and the examination table 107. Then, the portion of the compression member 50 corresponding to the region of interest is determined as the compression region, and the compression member 50 in this compression region is inflated to perform compression imaging. In other words, the inflated portion of the compression member 50 replaces the pillow or other object that was previously inserted.

[0039] Figure 4 is a schematic diagram illustrating the structure of a compression member 50 additionally inserted between the patient table 107 and the patient P of the X-ray diagnostic apparatus 1 according to this embodiment. As shown in Figure 4, the compression member 50 is divided into a plurality of blocks BL. In particular, in this embodiment, the compression member 50 is divided in a grid pattern, and each block BL is configured to expand and contract individually.

[0040] To enable each block BL to expand individually, the expansion control device 52 is configured to supply fluid to each block BL individually. The fluid supplied to the block BL of the compression member 50 is, for example, a gas. This is because a gas has little effect on the X-ray image during X-ray imaging. However, the fluid supplied to the block BL of the compression member 50 may also be a liquid.

[0041] The fluid output from the expansion control device 52 flows through the fluid piping 54 and is supplied to each of the block BLs. That is, the fluid piping 54 is connected to each block BL of the compression member 50, making it possible to supply fluid to each block individually. Blocks BL that are supplied with fluid expand individually and compress the subject P. On the other hand, block BL that are not supplied with fluid do not expand and do not compress the subject P.

[0042] Furthermore, the expansion control device 52 is configured to individually contract each of the blocks BL of the compression member 50. For example, the expansion control device 52 can contract a block BL by discharging the fluid from that block BL. To discharge the fluid from a block BL, for example, the expansion control device 52 may suck in the fluid, or the fluid may be released to the outside under the control of the expansion control device 52. For example, if the fluid is a gas, especially air, the block BL can be contracted by releasing air from the block BL into the atmosphere.

[0043] Figure 5 is a schematic diagram showing a partially enlarged cross-sectional structure of the compression member 50 shown in Figure 4. As shown in Figure 5, the compression member 50 comprises multiple blocks BL, and each block BL can be individually inflated. In the example in Figure 5, blocks BL2 and BL3 are inflated and compress the abdomen of the subject P lying on the compression member 50. On the other hand, blocks BL1 and BL4 are not inflated and do not compress the abdomen of the subject P.

[0044] A fluid pipe 54 is connected to each of the multiple block BLs. That is, the fluid supplied from the fluid pipe 54 is supplied to the interior of each of the multiple block BLs. Each fluid pipe 54 to each block BL is provided with a control valve 54a. The control valve 54a corresponding to the block BL to which fluid should be supplied from the fluid pipe 54 is in an open state, and fluid is supplied to the interior of the block BL. On the other hand, the control valve 54a corresponding to the block BL to which fluid should not be supplied from the fluid pipe 54 is in a closed state, and no fluid is supplied to the interior of the block BL. The control of opening or closing the control valve 54a is performed by the expansion control device 52.

[0045] Furthermore, each of the multiple block BLs is connected to a discharge pipe 56. That is, the fluid supplied to the blocks of the compression member 50 can be discharged individually through the discharge pipe 56. Each discharge pipe 56 from each block BL is provided with a control valve 56a. The control valve 56a corresponding to the block BL from which fluid should be discharged from the discharge pipe 56 is opened, and the fluid inside the block BL is discharged. On the other hand, the control valve 56a corresponding to the block BL from which fluid should not be discharged from the discharge pipe 56 is closed, and the fluid inside the block BL is not discharged from the discharge pipe 56. The control of opening or closing the control valve 56a is performed by the expansion control device 52.

[0046] In this embodiment, the fluid pipe 54 and the discharge pipe 56 are connected to the expansion control device 52. The expansion control device 52 sends fluid to the fluid pipe 54 and supplies fluid to the block BL corresponding to the open control valve 54a. The expansion control device 52 also draws fluid from the discharge pipe 56 and discharges the fluid from the block BL corresponding to the open control valve 56a. However, one end of the discharge pipe 56 may be opened to discharge the fluid to the outside.

[0047] Figure 6 is a flowchart illustrating the contents of the imaging preparation control process performed in the X-ray diagnostic apparatus 1 according to this embodiment. This imaging preparation control process is realized by the processing circuit 301 reading and executing the imaging preparation control program stored in the memory 303.

[0048] As shown in Figure 6, in the imaging preparation control process, the subject P is first positioned (step S10). For example, the display 305 of the X-ray diagnostic device 1 displays "Please position subject P," and the user positions subject P based on this display. The process of displaying such a message on the display 305 is realized by the imaging control function 3011 of the processing circuit 301.

[0049] Next, as shown in Figure 6, the X-ray diagnostic device 1 determines whether or not the positioning of the subject P is complete (step S12). In this embodiment, the imaging control function 3011 of the processing circuit 301 in the X-ray diagnostic device 1 determines whether or not the positioning is complete. For example, when the subject P is in a prone position and ready for anterior wall imaging, the user presses the "anterior wall analysis button". When this "anterior wall analysis button" is pressed, the X-ray diagnostic device 1 determines that the positioning of the subject P is complete. The "anterior wall analysis button" may be provided as a hardware switch on the input interface 307, or it may be displayed as a screen switch on the touch panel of the display 305.

[0050] Alternatively, artificial intelligence (AI) may be used to determine whether or not the positioning of subject P is complete. For example, an optical image acquisition unit 1014, which is composed of an optical camera or the like, may continuously photograph subject P, and when it is detected that subject P is in a prone position on the bed 107, the AI ​​may determine that the positioning of subject P is complete.

[0051] Then, if the imaging control function 3011 of the processing circuit 301 in the X-ray diagnostic device 1 determines that the positioning of the subject P is not yet complete (step S12: NO), the X-ray diagnostic device 1 waits by repeating steps S10 and S12 described above.

[0052] On the other hand, if the imaging control function 3011 of the processing circuit 301 in the X-ray diagnostic device 1 determines that the positioning of the subject P is complete (step S12: YES), the imaging control function 3011 of the X-ray diagnostic device 1 starts fluoroscopy of the subject P (step S14). For example, this fluoroscopy may be started automatically when the "anterior wall analysis button" is pressed, or it may be started when the user separately presses the fluoroscopy switch 3072 on the input interface 307.

[0053] Next, as shown in Figure 6, the X-ray diagnostic device 1 identifies a region of interest from the fluoroscopic image collected of the subject P (step S16). In this embodiment, the region of interest identification function 3012 of the processing circuit 301 in the X-ray diagnostic device 1 identifies the region of interest from the fluoroscopic image, which is an X-ray image. Subsequently, the X-ray diagnostic device 1 determines a compression region to be compressed on the subject P corresponding to this region of interest, based on the region of interest determined in step S16 (step S18). In this embodiment, the compression region determination function 3013 of the processing circuit 301 in the X-ray diagnostic device 1 determines the compression region corresponding to the region of interest.

[0054] Figure 7 shows an example of the correspondence between the region of interest (ROI) identified on

[0055] As shown in Figure 7, in the X-ray diagnostic apparatus 1 according to this embodiment, a region of interest identification screen W10 is displayed on the display 305. A fluoroscopic image is displayed on this region of interest identification screen W10, and based on this fluoroscopic image, the user inputs and specifies a region of interest (ROI). For example, the user inputs and specifies a region of interest (ROI) on this fluoroscopic image by operating a mouse or the like, which is part of the input interface 307. For example, the user can input a rectangular region of interest (ROI) into the region of interest identification screen W10 by dragging the mouse along the diagonal of the ROI. In this example, the X-ray diagnostic apparatus 1 can identify a region of interest (ROI) by the user inputting the ROI into the region of interest identification screen W10.

[0056] In the example of the region of interest identification screen W10 in Figure 7, a fluoroscopic image of the abdomen, including the stomach, of subject P is displayed, and the user performs compression imaging using the barium contained inside this stomach. Therefore, the user sets the region of interest (ROI) to the stomach area using the fluoroscopic image displayed on the region of interest identification screen W10 as a clue. In other words, by displaying the fluoroscopic image of subject P on the region of interest identification screen W10, the user can identify the region of interest (ROI).

[0057] The X-ray diagnostic device 1 determines the compression area based on the region of interest (ROI) entered on the region of interest identification screen W10. Specifically, although the subject P is lying prone on the bed 107, the compression area is determined to be the region corresponding to the region of interest (ROI) on subject P. More precisely, although subject P is lying on the bed 107, the position of subject P on the bed 107 varies. Therefore, the compression area is determined so that the region of interest (ROI) specified by the user matches the actual position of subject P.

[0058] As described above, the compression member 50 is composed of multiple block BLs. Therefore, the X-ray diagnostic device 1 determines one or more block BLs as compression regions based on the location and size of the identified region of interest (ROI). In other words, in this example, the device identifies and determines the block BLs to be inflated so that the correspondence between the region of interest (ROI) and the block BLs matches. The number of block BLs determined as compression regions by this determination is arbitrary, depending on the size of the region of interest (ROI). For example, one block BL may be determined as a compression region, or two or three block BLs may be determined as a compression region.

[0059] Furthermore, the X-ray diagnostic device 1 may determine the compression area based on the SID (Source to Image Distance), which is the distance from the X-ray focal point to the X-ray detector 105, and the region of interest (ROI). That is, if the SID is large, the fluoroscopic image will also be displayed larger. Therefore, even if the size of the region of interest (ROI) identified on the region of interest identification screen W10 is the same, the larger the SID, the smaller the compression area needs to be determined. In other words, as the SID increases, the compression area needs to be determined to be smaller relative to the size of the region of interest (ROI).

[0060] Alternatively, the region of interest identification function 3012 in the processing circuit 301 of the X-ray diagnostic device 1 may be performed using AI for identification. In this case, the AI ​​identifies the region of interest based on the fluoroscopic image. That is, a trained model is prepared that takes the fluoroscopic image as input and outputs the region of interest. The collected fluoroscopic image is input to this trained model, which outputs the region of interest, and the region of interest is identified based on this output. Then, as described above, the X-ray diagnostic device 1 determines the compression area based on this identified region of interest.

[0061] When using AI in this way, the timing for the AI ​​to identify the region of interest may be set to be automatically activated and calculated when the subject P is in a prone position. For example, the optical image acquisition unit 1014, which is composed of an optical camera or the like, may continuously photograph the subject P, and when it is detected that the subject P is in a prone position on the bed 107, the AI ​​may execute the process of identifying the region of interest.

[0062] In this case, instead of detecting the subject P's prone position on the bed 107 based on the X-ray fluoroscopic image of the subject P, the optical image acquisition unit 1014 may be used. For example, the X-ray diagnostic device 1 may analyze the LIH (Last Image Hold) image, which is the last image in the fluoroscopic view, to detect that the subject P is in a prone position.

[0063] In this case, the timing for starting the acquisition of fluoroscopic images may be instructed by the user, or the X-ray diagnostic device 1 may automatically detect the posture of the subject P and start the acquisition. When fluoroscopic image acquisition is started automatically, for example, the optical image acquisition unit 1014 may continuously photograph the subject P, and when the subject's posture reaches a predetermined position such as prone, fluoroscopic imaging may be started. In this way, when fluoroscopic imaging is started automatically based on the posture of the subject P, the region of interest identification function 3012 of the processing circuit 301 in the X-ray diagnostic device 1 constitutes the acquisition unit in this embodiment.

[0064] Alternatively, as shown in Figure 8, on the region of interest identification screen W10 displayed on the display 305, a grid-like grid SQ corresponding to block BL of the compression member 50 may be superimposed on the perspective image, and the user can identify the region of interest (ROI) and determine the compression area by selecting this grid SQ. This grid SQ corresponds to block BL of the compression member 50. That is, one grid SQ corresponds to one block BL, and the user can identify the region of interest (ROI) and determine the compression area by selecting a grid.

[0065] For example, using a mouse, which is an example of an input interface 307, the user moves the pointer PT on the region of interest identification screen W10. While viewing the perspective image displayed on this region of interest identification screen W10, the user selects a grid cell SQ located in the region of interest ROI. For example, by clicking the mouse button, the grid cell SQ where the pointer PT is located can be selected. In the example in Figure 8, four grid cells SQ are selected as the region of interest ROI.

[0066] The compression area determination function 3013 of the processing circuit 301 in the X-ray diagnostic apparatus 1 determines the compression area according to the user's selection of grid squares SQ. In the example in Figure 8, four block BLs corresponding to four grid squares SQ are determined as the compression area. The number of grid squares SQ selected by the user is arbitrary, and one or more grid squares SQ are selected as the region of interest (ROI). Furthermore, the arrangement of the selected grid squares SQ is also arbitrary, and multiple grid squares SQ may be selected in a non-rectangular arrangement.

[0067] Next, as shown in Figure 6, the X-ray diagnostic device 1 inflates the compression region of the compression member 50 determined in step S18 (step S20). In this embodiment, the compression control function 3014 of the processing circuit 301 in the X-ray diagnostic device 1 inflates the region of the compression member 50 corresponding to the compression region. More specifically, the compression control function 3014 outputs a control signal to the inflation control device 52 via the output interface 309, causing the inflation control device 52 to inflate the compression member 50 corresponding to the compression region.

[0068] Furthermore, in this embodiment, since the compression member 50 is composed of multiple blocks BL, the compression control function 3014 supplies fluid to the block BL corresponding to the compression area, causing the corresponding block BL to expand. This expansion of the block BL allows the subject P to be compressed.

[0069] When supplying fluid to the block BL to be expanded, the X-ray diagnostic apparatus 1 can control the degree to which the block BL is expanded by various methods. For example, the degree of expansion of the block BL can be controlled by controlling the fluid pressure. In particular, when the fluid is a gas, the degree to which the compressed area is expanded can be controlled by controlling the pressure of the gas supplied to the compressed area. In this embodiment, the compression control function 3014 of the processing circuit 301 in the X-ray diagnostic apparatus 1 controls the degree to which the block BL is expanded by outputting a control signal to the expansion control device 52 via the output interface 309.

[0070] Furthermore, to control the degree to which the compressed area expands, it is possible to control it using methods other than controlling the pressure of the fluid supplied to the compressed area. For example, the degree to which the compressed area expands can be controlled by controlling the amount of fluid supplied to the compressed area.

[0071] More specifically, for example, the X-ray diagnostic device 1 can control the degree to which block BL in the compression area expands based on body thickness information, which is information about the body thickness of the subject P. The body thickness information may be stored, for example, in memory 303, or it may be stored in the electronic medical record of a medical information system connected to the X-ray diagnostic device 1 via a network. The X-ray diagnostic device 1 reads and acquires the body thickness information stored therein and controls the degree of expansion of the compression area based on this body thickness information.

[0072] For example, if the body thickness information indicates that the subject P's body thickness is greater than average, the X-ray diagnostic device 1 increases the pressure of the fluid supplied to the compression area above the default value. Conversely, if the body thickness information indicates that the subject P's body thickness is thinner than average, the X-ray diagnostic device 1 decreases the pressure of the fluid supplied to the compression area below the default value.

[0073] Furthermore, the compression control function 3014 of the processing circuit 301 in the X-ray diagnostic device 1 may use AI to control the degree to which the compressed area is expanded. In this case, the X-ray diagnostic device 1 prepares a trained model that takes a fluoroscopic image, which is an X-ray image, as input and outputs the degree to which the compressed area is expanded. The fluoroscopic image collected from the subject P is input to this trained model and outputs the degree to which the compressed area is expanded. Then, based on the degree to which the compressed area is expanded output from the trained model, block BL in the compressed area is expanded.

[0074] Furthermore, the compression control function 3014 of the processing circuit 301 in the X-ray diagnostic device 1 may evaluate the visualization state of objects within the region of interest in the fluoroscopic image taken while compressing the subject P, and provide feedback control to the degree to which the expansion region is expanded. In other words, fluoroscopy can be performed even while fluid is being supplied to the block BL in the compression region to expand it. Various objects may be visualized within the region of interest in this fluoroscopic image, such as barium and stomach wall being typical examples of these objects. The visualization state of objects in the fluoroscopic image is one of the important factors when interpreting the captured image. Therefore, the compression state is evaluated based on the visualization state of objects within the region of interest, and the degree to which the compression region is expanded is controlled based on this evaluation.

[0075] For example, if the visualization of the object is good, the supply of fluid to the compression area is stopped at that point. Conversely, if the visualization of the object is not good, the fluid supply to the compression area is increased. The user may make the judgment as to whether the visualization is good or not, or an AI may make that judgment. In this case, a trained model is prepared that collects fluoroscopic images after compression of the subject is started, takes these fluoroscopic images as input, and outputs an evaluation of the visualization state. The fluoroscopic images of the subject P after compression is started are input to this trained model, and it outputs an evaluation of the visualization state. Based on the evaluation of the visualization state output from the trained model, the X-ray diagnostic device 1 provides feedback control to the extent to which the compression area is expanded.

[0076] In step S20, the process of expanding the compression area of ​​the compression member 50 is completed, and the imaging preparation control process according to this embodiment is terminated. After this imaging preparation control process is completed, the user proceeds with X-ray imaging of the subject P.

[0077] Figure 9 is a flowchart illustrating the contents of the shooting execution control process, which is executed based on user instructions after the shooting preparation control process is completed. This shooting execution control process is realized by the processing circuit 301 reading and executing the shooting execution control program stored in memory 303.

[0078] As shown in Figure 9, the first X-ray imaging is performed on the subject P, and the image is acquired (step S30). In this embodiment, the imaging control function 3011 of the processing circuit 301 in the X-ray diagnostic device 1 controls this X-ray imaging. In this X-ray imaging, the subject P is irradiated with X-rays at a higher tube current than in fluoroscopy, and the image is acquired.

[0079] Next, the X-ray diagnostic device 1 starts fluoroscopy (step S32). In this embodiment, the imaging control function 3011 of the processing circuit 301 in the X-ray diagnostic device 1 controls this fluoroscopy. As a result, the X-ray diagnostic device 1 can collect fluoroscopic images of the subject P.

[0080] Next, the X-ray diagnostic device 1 determines whether the subject P has moved after the compression member 50 has finished expanding (step S34). In this embodiment, the imaging control function 3011 of the processing circuit 301 in the X-ray diagnostic device 1 determines whether the subject P has moved after the compression member 50 has finished expanding.

[0081] For example, the fluoroscopic image taken during the expansion control process in step S20 of the imaging preparation control process is stored in memory 303. Alternatively, the fluoroscopic image taken at the moment the compression member 50 has finished expanding during the fluoroscopic imaging in step S20 is stored as a still image in memory 303. Then, the X-ray diagnostic device 1 compares the fluoroscopic image taken at the start of imaging in step S30 with the fluoroscopic image stored in memory 303 to determine whether or not the subject P has moved.

[0082] If it is determined that the subject P has moved after the compression member 50 has finished expanding (step S34: YES), the X-ray diagnostic device 1 re-identifies the region of interest based on the fluoroscopic image being captured (step S36), re-determines the compression region corresponding to the region of interest (step S38), and controls the expansion of the compression member 50 in the compression region (step S40). Since the processes in steps S36 and S38 are the same as steps S16 and S18 in the imaging preparation control process described above, a detailed explanation is omitted here.

[0083] However, the expansion control process in step S40 is slightly different from step S20 of the imaging preparation control process described above. That is, there are already expanded blocks BL in the compression member 50. Therefore, expanded blocks BL are contracted or non-expanded blocks BL are expanded to match the newly determined compression region. In this way, the expansion and contraction of the expansion member 50 are controlled to match the newly determined expansion region.

[0084] If the compression member 50 has finished expanding in step S40, or if it is determined in step S34 that the subject P is not moving (step S34: NO), the X-ray diagnostic device 1 performs a second X-ray imaging (step S42). In this embodiment, the imaging control function 3011 of the processing circuit 301 in the X-ray diagnostic device 1 controls this X-ray imaging. In this X-ray imaging, the subject P is irradiated with X-rays at a higher tube current than in fluoroscopy, and imaging is performed to acquire the image.

[0085] Next, as shown in Figure 9, the X-ray diagnostic device 1 contracts the compressed area of ​​the expanded compression member 50 (step S44). In this embodiment, the compression control function 3014 of the processing circuit 301 in the X-ray diagnostic device 1 contracts the area of ​​the compression member 50 corresponding to the compressed area. Specifically, the compression control function 3014 outputs a control signal to the expansion control device 52 via the output interface 309, and the expansion control device 52 contracts the compression member 50 in the expanded compressed area based on this control signal.

[0086] As described above, in this embodiment, the compression member 50 is composed of multiple blocks BL, so the compression control function 3014 discharges fluid from the expanded block BL and contracts the corresponding block BL. By contracting this block BL, the compression member 50 becomes flat, and the state of compressing the subject P is released.

[0087] In step S44, the expanded compression member 50 is deflated, thereby ending the imaging execution control process according to this embodiment. In the imaging execution control process illustrated in Figure 9, two X-ray images are taken, but the number of X-ray images is arbitrary. For example, the imaging execution control process may be completed after one X-ray image, or after three, four, etc. X-ray images. If the imaging execution control process is completed after one X-ray image, it is possible to determine whether the image was successfully acquired by X-ray imaging by checking whether the subject P moved in step S34. That is, if the subject P did not move, it can be determined that a normal image was acquired, and conversely, if the subject P moved, it can be determined that a normal image was not acquired.

[0088] Furthermore, in the X-ray imaging in steps S30 and S42, the user may use CAD (computer-aided diagnosis) to determine whether or not a normal image was obtained. In this case, the imaging execution control process proceeds to the next step when the user instructs the X-ray diagnostic device 1 to end the X-ray imaging.

[0089] Alternatively, the X-ray diagnostic device 1 may use AI to analyze the captured X-ray images and automatically determine whether or not a normal image has been obtained. In this case, if the AI ​​determines that a normal image has been obtained, the X-ray diagnostic device 1 will automatically proceed to the next process. For example, if the AI ​​determines that a normal image has been obtained in the second X-ray scan in step S42, the X-ray diagnostic device 1 will automatically proceed to step S44 and begin contracting the compression member 50.

[0090] As described above, the X-ray diagnostic apparatus 1 and X-ray diagnostic system according to this embodiment make it possible to accurately compress the area to be compressed on the subject P using the compression member 50. Therefore, the subject P can be compressed more accurately compared to when the compression area is determined by the user visually inspecting the subject P.

[0091] Furthermore, since the X-ray diagnostic device 1 automatically determines the compression area, the user no longer needs to repeatedly travel back and forth between the imaging room where the X-ray diagnostic device 1's imaging unit 10 is located and the control room where the X-ray diagnostic device 1's console unit 30 is located, enabling efficient compression imaging. This improves the workflow for users such as doctors and technicians, and enhances the accuracy of examinations.

[0092] It should be noted that the X-ray diagnostic apparatus 1 and X-ray diagnostic system described above are not limited to the embodiments described above and can be modified in various ways. For example, in the embodiments described above, the arrangement of the blocks BL of the compression member 50 was exemplified as a grid, but the arrangement of the blocks BL of the compression member 50 does not necessarily have to be a grid. For example, each of the blocks BL of the compression member 50 may be formed as a hexagon when viewed from the subject P, and these blocks BL may be arranged in a honeycomb structure without gaps. In other words, the arrangement of the blocks BL of the compression member 50 can be changed arbitrarily.

[0093] The arrangement of the blocks BL of the compression member 50 displayed on the area of ​​interest identification screen W10 must be changed to match the arrangement of the blocks BL of the compression member 50. In other words, the arrangement of the blocks BL of the compression member 50 displayed on the area of ​​interest identification screen W10 must be arranged in such a way that the user can intuitively understand the correspondence between the arrangement of the blocks BL of the compression member 50 displayed on the area of ​​interest identification screen W10 and the arrangement of the blocks BL of the compression member 50 on which the user is lying.

[0094] Furthermore, in the above-described embodiment, the compression member 50 and the expansion control device 52 were added to the X-ray diagnostic device 1 after the fact to constitute the X-ray diagnostic system. However, it is also possible to configure the X-ray diagnostic system with the compression member 50 and the expansion control device 52 already incorporated, rather than adding them after the fact. In other words, it is possible to manufacture and sell an X-ray diagnostic system with the compression member 50 and the expansion control device 52 already incorporated into the X-ray diagnostic device 1.

[0095] Furthermore, the expansion control device 52 can be incorporated into the X-ray diagnostic device 1, and the compression member 50 can be added later to constitute the X-ray diagnostic system. In particular, since the compression member 50 comes into contact with the subject P, it is reasonable to consider it as a separately sold consumable item when configuring the X-ray diagnostic system.

[0096] Furthermore, in the above-described embodiment, the X-ray diagnostic system and its usage were explained using the case of compressive radiography of the abdomen as an example. However, the X-ray diagnostic system and its usage according to this embodiment can also be used when compressive radiography is performed on other parts of the subject P. In other words, the X-ray diagnostic system and its usage according to this embodiment can be used when it is desired to compress the subject P efficiently and accurately.

[0097] In the above explanation, the term "processor" refers to circuits such as a CPU (Central Processing Unit), a GPU (Graphics Processing Unit), an Application Specific Integrated Circuit (ASIC), or a programmable logic device (e.g., a Simple Programmable Logic Device (SPLD), a Complex Programmable Logic Device (CPLD), and a Field Programmable Gate Array (FPGA)). A processor functions by reading and executing a program stored in a memory circuit. Alternatively, instead of storing the program in a memory circuit, the processor may be configured to directly incorporate the program into its circuitry. In this case, the processor functions by reading and executing the program incorporated into the circuitry. Furthermore, a processor is not limited to being a single circuit; it may also be composed of multiple independent circuits combined to form a single processor and achieve its functions. In addition, multiple components may be integrated into a single processor to achieve its functions.

[0098] According to at least one embodiment described above, it becomes possible to efficiently and accurately compress the area of ​​the subject P to be compressed and perform compression imaging.

[0099] Although several embodiments have been described above, these embodiments are presented only as examples and are not intended to limit the scope of the invention. The novel apparatus and methods described herein can be implemented in a variety of other forms. Furthermore, various omissions, substitutions, and modifications can be made to the embodiments of the apparatus and methods described herein, without departing from the spirit of the invention. The appended claims and equivalents are intended to include such embodiments and modifications that are included in the scope and spirit of the invention. [Explanation of symbols]

[0100] 1...X-ray diagnostic equipment, 10...Imaging equipment, 30...Console equipment, 101...X-ray irradiation unit, 103...High voltage device, 105...X-ray detector, 107...Patient table, 301...Processing circuit, 303...Memory, 305...Display, 307...Input interface, 309...Output interface

Claims

1. A special unit that identifies a region of interest from X-ray images collected from the subject, A compression member that compresses the subject by expanding, comprising a determination unit that determines the compression region that compresses the subject in accordance with the region of interest, A control unit that expands the compression region of the compression member, An X-ray diagnostic device equipped with [specific features / features].

2. The compression member is composed of a plurality of individually expandable blocks, The determination unit determines one or more of the blocks corresponding to the region of interest as the compression region. The X-ray diagnostic apparatus according to claim 1.

3. The X-ray diagnostic apparatus according to claim 2, wherein the determination unit determines the compression area based on the position and size of the region of interest.

4. The X-ray diagnostic apparatus according to claim 2, wherein the determination unit determines the compression region based on the SID, which is the distance from the X-ray focal point to the X-ray detector, and the region of interest.

5. The X-ray diagnostic apparatus according to claim 4, wherein the determination unit determines the compression area to be smaller relative to the size of the region of interest as the SID increases.

6. The X-ray diagnostic apparatus according to claim 1, wherein the identifying unit takes the fluoroscopic image collected as the X-ray image as input and obtains an output from a trained model that outputs the region of interest, thereby identifying the region of interest.

7. The X-ray diagnostic apparatus according to claim 2, wherein the identifying unit identifies the region of interest based on the user's designation of the fluoroscopic image collected as the X-ray image.

8. A display image is shown in which a grid-like pattern corresponding to the block is superimposed on the perspective image. The specified unit determines the compression area according to the user's selection of the grid in the displayed image. The X-ray diagnostic apparatus according to claim 7.

9. The X-ray diagnostic apparatus according to claim 1, wherein the control unit controls the degree to which the compression area is expanded based on the body thickness information of the subject.

10. The X-ray diagnostic apparatus according to claim 1, wherein the control unit takes the fluoroscopic image collected as the X-ray image as input, obtains an output from a trained model which outputs the degree to which the compressed area is expanded, and controls the degree to which the compressed area is expanded.

11. The X-ray diagnostic apparatus according to claim 9 or claim 10, wherein the control unit controls the degree to which the compression region is expanded by controlling the air pressure supplied to the compression region.

12. The X-ray diagnostic apparatus according to claim 9 or 10, wherein the control unit evaluates the state of depiction of objects within the region of interest in the fluoroscopic image and provides feedback control to the extent to which the compressed region is expanded.

13. An acquisition unit that acquires an optical image of the subject, When the posture of the subject in the optical image is in a specified posture, the collection unit collects the fluoroscopic image as the X-ray image, An X-ray diagnostic apparatus according to any one of claims 6 to 8, further comprising the above.

14. The X-ray diagnostic apparatus according to any one of claims 1 to 10, wherein the compression member is placed between the bed and the subject.

15. The X-ray diagnostic apparatus according to any one of claims 1 to 10, wherein the control unit controls the expansion of the compression member by outputting a control signal to an expansion control device that controls the expansion of the compression member by supplying fluid to the compression member.

16. The system further includes an imaging control unit that, after performing X-ray imaging, expands the aforementioned expansion region and then determines whether or not the subject has moved. If the imaging control unit determines that the subject has moved, The aforementioned identification unit then identifies the region of interest again from the X-ray image. The determination unit then determines the compression region corresponding to the region of interest again. The control unit controls the expansion and contraction of the expansion member to match the determined compression region. An X-ray diagnostic apparatus according to any one of claims 1 to 10.

17. X-ray diagnostic equipment and A compression member is placed between the X-ray diagnostic apparatus and the subject, and expands to compress the subject. An X-ray diagnostic system comprising, The aforementioned X-ray diagnostic apparatus, A region of interest is identified from X-ray images collected from the subject, Among the compression members, a determination unit determines a compression region that compresses the subject in accordance with the region of interest, A control unit that expands the compression region of the compression member, An X-ray diagnostic system equipped with [features / equipment].

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