X-ray diagnosis device and console device

Abstract

To provide a flexible and simple visual-field operation in X-ray imaging.SOLUTION: An X-ray diagnosis device according to an embodiment includes: an X-ray tube generating an X-ray; an X-ray detector for detecting the X-ray; an image generation part; a display control part; a first operation part; and a second operation part. The image generation part generates an X-ray image based on the X-ray detected by the X-ray detector. The display control part displays the X-ray image on a display part. The first operation part receives an operation of inputting a center position of the display image for displaying on the display part. The second operation part receives an operation of inputting a visual field size of the display image continuously. Also, according to the operation of the second operation part, the display control part changes the visual field size of the display image in a state where the current center position of the display image is maintained.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The embodiments disclosed in this specification and the drawings relate to an X-ray diagnostic apparatus and a console apparatus. [Background technology]

[0002] Conventionally, in procedures using X-ray diagnostic equipment, the user performs the procedure by displaying an image of a desired target position (site of interest) within the X-ray detector according to clinical purposes, rather than an X-ray image obtained from the entire surface of the X-ray detector. At this time, the X-ray irradiation range (irradiation field) is moved to the desired target position within the X-ray detector by operating the stick. At this time, the X-ray irradiation range is controlled by asymmetrically controlling the four aperture blades on the top, bottom, left and right sides, so that X-rays are irradiated only to the target position.

[0003] In such an X-ray diagnostic device, only a multi-step discrete fixed size can be selected as the field of view size for displaying the target position. Therefore, in order to display the desired field of view size required clinically, a fixed size close to and larger than the desired field of view size is selected, and the X-ray irradiation range is narrowed using an X-ray aperture for the selected fixed size, thereby adjusting the X-ray field size and irradiation range. In this way, since only a predefined fixed size can be selected and the selected fixed size is displayed on the entire screen, it is not possible to easily set the field of view size to a free size, and it is difficult to display the target position at a desired size. Therefore, when manipulating the X-ray irradiation range in the X-ray detector, the user cannot easily operate the field of view, which may affect the efficiency of the examination. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2019-005346 A Summary of the Invention [Problem to be solved by the invention]

[0005] One of the problems to be solved by the embodiments disclosed in this specification and the drawings is to provide a free and easy field of view operation in X-ray 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 later can also be positioned as other problems. [Means for solving the problem]

[0006] An X-ray diagnostic apparatus according to an embodiment includes an X-ray tube that generates X-rays, an X-ray detector that detects the X-rays, an image generating unit, a display control unit, a first operation unit, and a second operation unit. The image generating unit generates an X-ray image based on the X-rays detected by the X-ray detector. The display control unit displays the X-ray image on a display unit. The first operation unit accepts an operation to input a center position of a display image to be displayed on the display unit. The second operation unit accepts an operation to input a field of view size of the display image in a stepless manner. Furthermore, the display control unit changes the field of view size of the display image in response to an operation of the second operation unit while maintaining the center position of the current display image. [Brief description of the drawings]

[0007] [Figure 1] FIG. 1 is a diagram showing an example of the configuration of an X-ray diagnostic apparatus according to the first embodiment. [Diagram 2] FIG. 2 is a diagram illustrating an example of the configuration of an input interface according to the first embodiment. [Diagram 3] FIG. 3 is a flowchart illustrating a processing procedure performed by the X-ray diagnostic apparatus according to the first embodiment. [Figure 4] FIG. 4 is a diagram for explaining the process of changing the viewing range of a display image in the first embodiment. [Diagram 5] FIG. 5 is a diagram showing a state in which the center position in FIG. 4 is changed. [Figure 6] FIG. 6 is a diagram showing a state in which the irradiation range in FIG. 5 is changed. [Figure 7] FIG. 7 is a diagram showing a state in which the field of view size in FIG. 6 is changed. [Figure 8] FIG. 8 is a diagram showing a state in which the field of view range in FIG. 7 is further changed. [Figure 9] FIG. 9 is a flowchart illustrating a processing procedure performed by the X-ray diagnostic apparatus according to the second embodiment. [Figure 10] FIG. 10 is a diagram showing an example of a display screen displayed by the X-ray diagnostic apparatus according to the second embodiment. [Figure 11] FIG. 11 is a diagram showing a state in which the viewing range of the enlarged image exceeds the illumination range in the second embodiment. [Figure 12] FIG. 12 is a diagram showing a state in which the irradiation range in FIG. 11 has been moved. [Figure 13] FIG. 13 is a diagram showing an enlarged irradiation range in FIG. [Figure 14] FIG. 14 is a diagram showing a state in which the viewing range of the enlarged image exceeds the installation range of the X-ray detector in the second embodiment. [Figure 15] FIG. 15 is a diagram showing a state in which the field of view range in FIG. 14 is reduced. [Figure 16] FIG. 16 is a diagram showing an example of a display screen displayed in the state shown in FIG. [Figure 17] FIG. 17 is a diagram showing an X-ray image including the installation range of the X-ray detector as the whole image in the second embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] Hereinafter, an embodiment of an X-ray diagnostic apparatus will be described in detail with reference to the drawings. In the following description, components having substantially the same functions and configurations are denoted by the same reference numerals, and repeated description will be given only when necessary.

[0009] (First embodiment) 1 is a diagram showing an example of the configuration of an X-ray diagnostic apparatus 1 according to the first embodiment. The X-ray diagnostic apparatus 1 corresponds to an X-ray fluoroscopy diagnostic apparatus used in, for example, a gastrointestinal contrast examination. The X-ray diagnostic apparatus 1 may be, for example, a circulatory X-ray fluoroscopy diagnostic apparatus used in, for example, angiography.

[0010] 1, the X-ray diagnostic apparatus 1 includes an imaging device 10, a bed device 30, and a console device 40. The imaging device 10 includes a high-voltage generator 11, an X-ray generator 12, an X-ray detector 13, a C-arm 14, and a C-arm driver 142.

[0011] A high voltage generator 11 generates a high voltage to be applied between the anode and cathode in order to accelerate thermoelectrons generated from the cathode of the X-ray tube, and outputs the high voltage to the X-ray tube.

[0012] The X-ray generation unit 12 includes an X-ray tube that irradiates the subject P with X-rays, a plurality of filters (hereinafter referred to as additional filters) that have the function of attenuating or reducing the amount of irradiated X-rays, and an X-ray aperture.

[0013] An X-ray tube is a vacuum tube that generates X-rays. It comprises a tube, a filament (cathode) attached to the tube, and a tungsten anode. In an X-ray tube, the thermal electrons emitted from the filament are accelerated by a high voltage. In an X-ray tube, the accelerated electrons collide with the tungsten anode to generate X-rays.

[0014] The X-ray aperture is located between the X-ray tube and the X-ray detector 13, and is made of a lead plate as a metal plate. The X-ray aperture blocks X-rays outside the aperture area, narrowing the X-rays generated by the X-ray tube so that only the region of interest of the subject P is irradiated, thereby adjusting the size of the X-ray irradiation range (hereinafter referred to as the field of view size). For example, the X-ray aperture has four aperture blades that are independently movable, and by sliding these aperture blades, the region where the X-rays are blocked is adjusted to an arbitrary size, thereby adjusting the field of view size. The aperture blades of the X-ray aperture are driven by a drive device (aperture drive unit) not shown in the figure according to the region of interest input by the operator from the input interface 43.

[0015] As described above, the X-ray aperture limits the irradiation range of the X-rays generated by the X-ray tube. By limiting the irradiation range of the X-rays by the X-ray aperture, the operator can irradiate X-rays only to the imaging region (or imaging range) of the subject P desired by the operator. In other words, the X-ray aperture can prevent unnecessary exposure to a region (or range) different from the imaging region (or imaging range). Furthermore, by independently controlling the driving of the four aperture blades, the irradiation range to which the X-rays are irradiated can be freely set. Furthermore, the X-ray aperture can reduce scattered X-rays and remove off-focus X-rays. Hereinafter, the phrase "limit the irradiation range of the X-rays" may be read as "shield X-rays", "narrow X-rays", or "limit the irradiation range of the X-rays".

[0016] The X-ray detector 13 detects X-rays emitted from an X-ray tube and transmitted through the subject P. As such an X-ray detector 13, one that directly converts X-rays into electric charges and one that converts X-rays into light and then converts them into electric charges can be used. Here, the former is described as an example, but the latter may also be used. That is, the X-ray detector 13 includes, for example, a flat FPD (Flat Panel Detector) that converts X-rays transmitted through the subject P into electric charges and accumulates them, and a gate driver that generates a drive pulse for reading out the electric charges accumulated in the FPD. The FPD is configured by arranging small detection elements two-dimensionally in the column direction and line direction. Each detection element includes a photoelectric film that senses X-rays and generates electric charges according to the amount of incident X-rays, a charge storage capacitor that accumulates the electric charges generated in the photoelectric film, and a TFT (thin film transistor) that outputs the electric charges accumulated in the charge storage capacitor at a predetermined timing. The accumulated electric charges are sequentially read out by a drive pulse supplied by the gate driver. The X-ray detector 13 is an example of an X-ray detection unit. A projection data generating circuit (not shown) is provided downstream of the X-ray detector 13. The projection data generating circuit includes a parallel-serial converter that converts digital signals read out in parallel on a row-by-row or column-by-column basis from the FPD of the X-ray detector 13 into a time-series serial signal (time-series projection data). The time-series projection data is output from the projection data generating circuit and supplied to the console device 40.

[0017] The C-arm 14 is configured to hold the X-ray generator 12 and the X-ray detector 13 and perform X-ray imaging while rotating. The C-arm 14 has a configuration in which the X-ray generator 12 and the X-ray detector 13 are held so as to face each other across the subject P and the top plate 33, thereby enabling X-ray imaging of the subject P on the top plate 33. The C-arm 14 is supported so as to be slidable and rotatable about each of a plurality of rotation axes. The C-arm 14 is provided with a plurality of power sources at appropriate locations for realizing the sliding and rotating operations. These power sources constitute the C-arm driving device 142. The C-arm driving device 142 reads a driving signal from the driving control function 442 and causes the C-arm 14 to perform a sliding movement, a rotating movement, and a linear movement. The C-arm 14 is an example of a support arm.

[0018] The bed device 30 is a device on which the subject P is placed and moved, and includes a base 31, a bed driving device 32, a top board 33, and a support frame .

[0019] The base 31 is a housing that is placed on a floor surface and supports the support frame 34 so as to be movable in the vertical direction (Z direction).

[0020] The bed driving device 32 is housed in the housing of the bed device 30 and is a motor or actuator that moves the top board 33 on which the subject P is placed in the longitudinal direction (Y direction) of the top board 33. The bed driving device 32 reads a driving signal from the drive control function 442 and moves the top board 33 horizontally or vertically relative to the floor surface. The positional relationship of the imaging axis with respect to the subject P changes as the C-arm 14 or the top board 33 moves. Note that the bed driving device 32 may move the support frame 34 in the longitudinal direction of the top board 33 in addition to the top board 33.

[0021] The top board 33 is provided on the upper surface of the support frame 34, and is a board on which the subject P is placed.

[0022] The support frame 34 is provided on the upper part of the base 31 and supports the top plate 33 so that the top plate 33 can slide along the longitudinal direction.

[0023] In addition, in the bed device 30, the tabletop 33 may be movable relative to the support frame 34, or the tabletop 33 and the support frame 34 may be movable together relative to the base 31.

[0024] The console device 40 includes a memory 41, a display 42, an input interface 43, and a processing circuit 44. Although the console device 40 will be described as being separate from the imaging device 10, the imaging device 10 may include the console device 40 or some of the components of the console device 40. The console device 40 corresponds to, for example, a medical image processing device.

[0025] In the following description, the console device 40 will be described as a single console that executes multiple functions, but multiple functions may be executed by separate consoles. For example, the functions of the processing circuit 44, such as an image generating function 444 described below, may be distributed and installed in different console devices.

[0026] The memory 41 is a storage device such as an HDD (Hard Disk Drive), an SSD (Solid State Drive), or an integrated circuit that stores various information. The memory 41 may be a portable storage medium such as a CD (Compact Disc), a DVD (Digital Versatile Disc), or a flash memory, in addition to an HDD or SSD. The memory 41 may be a drive device that reads and writes various information to and from a semiconductor memory element such as a flash memory or a RAM (Random Access Memory). The storage area of ​​the memory 41 may be located within the console device 40, or may be located within an external storage device connected via a network.

[0027] The memory 41 stores programs executed by the processing circuit 44, various data used in the processing of the processing circuit 44, and the like. As the program, for example, a program that is installed in advance in a computer from a network or a non-transient computer-readable storage medium and causes the computer to realize each function of the processing circuit 44 is used. Note that the various data handled in this specification are typically digital data. The memory 41 is an example of a storage unit.

[0028] The display 42 displays various types of information. For example, the display 42 outputs medical images (X-ray images) generated by the processing circuit 44, a GUI (Graphical User Interface) for receiving various operations from an operator, and the like. For example, the display 42 is a liquid crystal display or a CRT (Cathode Ray Tube) display. The display 42 may be provided in the imaging device 10. The display 42 may be a desktop type, or may be configured as a tablet terminal or the like capable of wireless communication with the console device 40 main body. The display 42 is an example of a display unit.

[0029] The input interface 43 receives various input operations from the operator, converts the received input operations into electrical signals, and outputs the electrical signals to the processing circuitry 44. For example, the input interface 43 receives from the operator scan conditions for collecting projection data, instructions to move the C-arm 14, setting a region of interest (ROI), and operations for performing fluoroscopy. For example, the input interface 43 is realized by a mouse, keyboard, trackball, switch button, joystick, a touch screen in which a display screen and a touch pad are integrated, a non-contact input circuit using an optical sensor, and a voice input circuit for performing various processes of the processing circuitry 44. The input interface 43 is connected to the processing circuitry 44, and converts input operations received from the operator into electrical signals and outputs the electrical signals to the control circuitry. In this specification, the input interface is not limited to only those having physical operating parts such as a mouse and a keyboard. For example, 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 circuitry 44 is also included in the examples of the input interface. The input interface 43 may be provided in the imaging device 10, or may be configured as a tablet terminal or the like capable of wireless communication with the main body of the console device 40. The input interface 43 is an example of an input unit.

[0030] The input interface 43 also includes a first operation unit that accepts an operation to input the center position of the display image to be displayed on the display 42, and a second operation unit that accepts an operation to input the field of view size of the display image in a stepless manner. The second operation unit is, for example, an operation unit that allows a user to accept a movement operation. In this case, the second operation unit accepts the input of the field of view size based on the movement operation by the user. Alternatively, the second operation unit may accept an input regarding a reduction in the field of view size in response to a movement operation by the user in a first direction, and may accept an input regarding an increase in the field of view size in response to a movement operation by the user in a direction opposite to the first direction. Alternatively, the second operation unit may be a slide bar, and may accept an input of the field of view size in response to an amount by which the user moves the slide bar. In addition to the operation to input the field of view size, an operation to cancel the input of the field of view size may be accepted.

[0031] The processing circuitry 44 controls the overall operation of the X-ray diagnostic apparatus 1. The processing circuitry 44 is a processor that executes a system control function 441, a drive control function 442, an X-ray control function 443, an image generation function 444, and a display control function 445 by calling and executing programs in the memory 41.

[0032] In FIG. 1, the system control function 441, the drive control function 442, the X-ray control function 443, the image generation function 444, and the display control function 445 are realized by a single processing circuit 44, but this is not limited thereto. For example, a processing circuit may be configured by combining a plurality of independent processors, and each processor may execute a program to realize each function. In addition, the system control function 441, the drive control function 442, the X-ray control function 443, the image generation function 444, and the display control function 445 may be called a system control circuit, a drive control circuit, an X-ray control circuit, an image generation circuit, and a display control circuit, respectively, and may be implemented as individual hardware circuits. The above description of each function executed by the processing circuit 44 is the same in the following embodiments and modified examples.

[0033] Although the console device 40 is described as a single console that executes multiple functions, the multiple functions may be executed by separate devices. For example, the functions of the processing circuit 44 may be distributed and installed in different devices.

[0034] The term "processor" used in the above description means a circuit such as a central processing unit (CPU), a graphics processing unit (GPU), an application specific integrated circuit (ASIC), 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)). When the processor is, for example, a CPU, the processor realizes a function by reading and executing a program stored in a memory circuit. On the other hand, when the processor is, for example, an ASIC, instead of storing the program in a memory circuit, the function is directly incorporated as a logic circuit in the circuit of the processor. Note that each processor in this embodiment is not limited to being configured as a single circuit for each processor, and may be configured as one processor by combining multiple independent circuits to realize the function. Furthermore, the multiple components in FIG. 1 may be integrated into one processor to realize the function. The above description of the "processor" is the same for each of the following embodiments and modified examples.

[0035] Furthermore, an apparatus configured with the memory 41, the display 42, the input interface 43, and the image generating function 444 and the display control function 445 of the processing circuitry 44 may be called a medical image processing apparatus. Therefore, the description of the memory 41, the display 42, the input interface 43, and the image generating function 444 and the display control function 445 of the processing circuitry 44 also serves as a description of the medical image processing apparatus. Furthermore, the medical image processing apparatus configured with the memory 41, the display 42, the input interface 43, and the image generating function 444 and the display control function 445 of the processing circuitry 44 may be provided as a separate apparatus capable of communicating with the X-ray diagnostic apparatus 1.

[0036] The processing circuitry 44 controls each of the multiple components in the X-ray diagnostic apparatus 1 based on an input operation received from an operator via the input interface 43 using a system control function 441. For example, the processing circuitry 44 controls various components in the imaging apparatus 10 according to imaging conditions.

[0037] The processing circuitry 44 controls the C-arm driving device 142 and the bed driving device 32 using a drive control function 442, for example, based on information related to the driving of the C-arm 14 and the table top 33 input from the input interface 43. The processing circuitry 44 also controls the driving of the X-ray aperture using the drive control function 442. At this time, the processing circuitry 44 controls the irradiation range in response to the operation of the first operation unit or the second operation unit. The processing circuitry 44 that realizes the drive control function 442 is an example of a drive control unit.

[0038] The processing circuitry 44 uses an X-ray control function 443 to control X-ray conditions such as the tube current, tube voltage, focal spot size, irradiation time, and pulse width in the high voltage generator 11, for example, by reading information from the system control function 441. The X-ray control function 443 also reads information from the system control function 441 and controls the drive of each aperture blade of the X-ray aperture asymmetrically, thereby controlling the X-ray irradiation range. The processing circuitry 44 that realizes the X-ray control function 443 is an example of an X-ray control unit.

[0039] The processing circuitry 44 acquires projection data generated based on detection data read from the X-ray detector 13 by the image generation function 444, and generates an X-ray image such as a fluoroscopic image based on the projection data. Note that various synthesis processes, subtraction processes, etc. may be performed on the generated X-ray image. The processing circuitry 44 that realizes the image generation function 444 is an example of an image generation unit.

[0040] The processing circuitry 44 reads the signal from the system control function 441, acquires a desired X-ray image from the memory 41, and displays it on the display 42 through the display control function 445. The processing circuitry 44 realizing the display control function 445 is an example of a display control unit.

[0041] Furthermore, the processing circuitry 44 controls the field of view range of the display image to be displayed on the display 42, based on the operation of a first operation unit that operates the center position of the display image and a second operation unit that continuously operates the field of view size of the display image, using a display control function 445. In the display control function 445, the processing circuitry 44 changes the field of view size of the display image in accordance with the operation of the second operation unit, while maintaining the current center position of the display image. At this time, the processing circuitry 44 changes the X-ray irradiation range in accordance with the change in field of view size by driving the X-ray aperture in accordance with the change in field of view size.

[0042] Next, a specific example of the configuration of the input interface 43 will be described. Fig. 2 is a diagram showing the configuration of the input interface 43 in this embodiment. As shown in Fig. 2, the input interface 43 in this embodiment includes a start button 431, a center position operation unit 432, and a visual field size operation unit 433.

[0043] The start button 431 is an interface for inputting an operation to start X-ray photography such as fluoroscopy. When the start button 431 is operated, for example, an X-ray image generated by X-ray photography is displayed on the display 42. The start button 431 may be used as an interface for inputting an operation to end X-ray photography.

[0044] Although not shown, the input interface 43 also includes a fixed visual field size selection section for selecting one of a plurality of fixed visual field sizes (hereinafter referred to as fixed visual field sizes) prepared in advance. The fixed visual field sizes are multiple discrete fixed sizes prepared in advance. The fixed visual field size selection section can be realized by, for example, a button.

[0045] The center position operation unit 432 is an interface for inputting the center position of the display screen. The center position operation unit 432 corresponds to a first operation unit. The center position operation unit 432 can be realized by, for example, a joystick, a shift lever, a paddle lever, a slide bar, a button, a pedal, a dial, or the like. In the example of FIG. 2, the center position operation unit 432 is realized by a joystick that can operate the center position 711 in a stepless manner. The center position operation unit 432 may also be an interface that can directly input the coordinates of the center position 711.

[0046] The visual field size operation unit 433 is an interface for inputting the visual field size of the display screen. The visual field size operation unit 433 corresponds to a second operation unit. An operation for reducing the visual field size corresponds to an operation for zooming in on the display screen. An operation for enlarging the visual field size corresponds to an operation for zooming out on the display screen. The visual field size operation unit 433 is configured to allow the visual field size to be freely input in an infinite number of steps. The input visual field size may be a relative value such as an enlargement rate or reduction rate with respect to the current visual field size, or may be an absolute value such as the actual size of the visual field. The visual field size operation unit 433 may also be an interface that allows the value of the visual field size to be directly input.

[0047] The visual field size operation unit 433 can be realized by, for example, a joystick, a shift lever, a paddle lever, a slide bar, a button, a pedal, a dial, a keypad controller, software such as a GUI, etc. The visual field size operation unit 433 can also be realized by a seesaw-type, twist-type, or finger-ring-type mouse, etc. For example, when a lever is used as the visual field size operation unit 433, the visual field size can be input in a stepless manner according to the position and twist angle of the lever.

[0048] In the example of Fig. 2, the visual field size operation unit 433 is realized by a slide bar that can change the visual field size steplessly depending on the position of the bar. For example, moving the slide bar to the right reduces the visual field size (zoom in), and moving the slide bar to the left increases the visual field size (zoom out). In addition, pushing the slide bar down toward the inside of the central recess cancels the enlargement or reduction of the visual field size.

[0049] The visual field size operation unit 433 may be provided in combination with other input interfaces such as the central position operation unit 432. For example, a button may be added as the visual field size operation unit 433 to a lever provided as the central position operation unit 432. A dial combined with other functions may be used as the visual field size operation unit 433. When a keypad controller is used as the central position operation unit 432 and the visual field size operation unit 433, for example, the position of the display area can be operated by the touch position, and the visual field size can be enlarged / reduced by pinching. The function of the visual field size operation unit 433 may be incorporated into the fluoroscopy pedal. In this case, for example, the visual field size can be operated steplessly according to the degree of depression of the fluoroscopy pedal. The visual field size may be enlarged / reduced by tilting the joystick while it is pressed in. In this case, the enlargement / reducing of the visual field size may be released by double-clicking. The visual field size may be enlarged / reduced by holding the joystick after double-clicking.

[0050] Also, an existing configuration may be diverted as the visual field size operation unit 433. For example, an existing button provided on the lever, which is the center position operation unit 432, may be given the function as the visual field size operation unit 433. In this case, the second operation unit is a button provided on the first operation unit, and the processing circuitry 44 determines the change amount of the visual field size of the display image according to the button press content by the user and the input operation to the first operation unit by the display control function 445. For example, the processing circuitry 44 reduces (zooms in) the visual field size when the button is pressed once and the pressed state is continued (held) for a preset time or more by the display control function 445, and increases (zooms out) the visual field size when the button is pressed twice and the pressed state is continued for a preset time or more after the second press. Also, the fluoroscopic pedal may be given the function as the visual field size operation unit 433. Also, the function of the visual field size operation unit 433 may be executed by voice operation. Also, the visual field size may be enlarged / reduced by tilting the lever up or down while the button is pressed. In this case, for example, when the lever is tilted upward as seen by the user, the visual field size is reduced (zoomed in), and when the lever is tilted downward as seen by the user, the visual field size is enlarged (zoomed out). Note that it is preferable that the button is pressed with the user's thumb, and that the button is preferably provided on the side of the lever or on the top end of the lever. Note that when the button is provided on the side of the lever, it may be provided on the left side of the lever if the lever is for right hand use, or on the right side of the lever if the lever is for left hand use.

[0051] In addition to the above configuration, an aperture lever or an operation paddle for adjusting the aspect ratio of the field of view size may be provided. Furthermore, a plurality of functions among the plurality of operation units may be integrated into one operation unit.

[0052] Next, a description will be given of the operation of the X-ray diagnostic apparatus 1 according to this embodiment. Fig. 3 is a flow chart showing an example of the procedure of processing executed by the processing circuitry 44 in X-ray imaging. Note that the process steps described below are merely examples, and each process may be modified as much as possible. In addition, steps may be omitted, replaced, or added as appropriate to the process steps described below according to the embodiment.

[0053] When starting X-ray photography, the X-ray diagnostic apparatus 1 starts X-ray photography using the imaging apparatus 10 in response to a user's operation of the start button 431 in Fig. 2. The X-ray photography is, for example, fluoroscopy.

[0054] Fig. 4 is a diagram for explaining the range displayed on the display 42 during X-ray photography. The detector installation range 70 is the area where the X-ray detector 13 is installed. The irradiation range 71 is the area where the X-rays are actually irradiated when the irradiation range is narrowed by the X-ray aperture. When X-rays are irradiated from the X-ray tube, the X-rays irradiated to the irradiation range 71 are detected by the X-ray detector 13, and an X-ray image of the irradiation range 71 is displayed on the display screen of the display 42. The gray areas in Fig. 4 indicate areas that are blocked by the X-ray aperture.

[0055] The user selects one fixed field of view size from among a plurality of preset fixed field of view sizes. When the fixed field of view size is selected, the processing circuit 44 determines the irradiation range 71 based on the selected fixed field of view size (step S101). At this time, the center position 711 of the irradiation range 71 is set to coincide with the center position of the detector installation range 70. Therefore, the irradiation range 71 has the same center position as the detector installation range 70, and has a field of view size defined by the selected fixed field of view size.

[0056] Next, the processing circuitry 44 causes the display 42 to display the X-ray image generated by limiting the X-ray irradiation range to the irradiation range 71 (step S102). At this time, the processing circuitry 44 first causes the X-ray tube to irradiate X-rays using the X-ray control function 443. At this time, the driving of the X-ray aperture is controlled so that X-rays are irradiated only to the irradiation range 71, and X-rays are irradiated only to the irradiation range 71.

[0057] Next, the processing circuit 44 generates an X-ray image based on the signal read out from the X-ray detector 13 using the image generation function 444 .

[0058] Next, the processing circuitry 44 causes the display control function 445 to display the generated X-ray image on the display 42. At this time, an X-ray image in which the irradiation range 71 is enlarged is displayed on the display screen of the display 42.

[0059] During X-ray imaging, the X-ray diagnostic apparatus 1 can update the X-ray image displayed on the display screen of the display 42 to an X-ray image at a position that the user wants to confirm in real time by operating the center position operation unit 432 or the field of view size operation unit 433. Here, as an example, the operation and processing when the user wants to confirm the X-ray image at the target position 72 shown in FIG. 4 will be described. The target position 72 is a desired area that the user wants to confirm now, for example, a position near the device when fluoroscopy is performed. When the user wants to confirm the X-ray image at the target position 72, the user first operates the center position operation unit 432 to move the center position 711 of the display screen on which the irradiation range 71 is displayed to the center of the target position 72 as shown in FIG. 5.

[0060] When an operation to change the center position 711 is performed in the center position operation unit 432 (step S103-Yes), the processing circuit 44 changes the illumination range 71 according to the change in the center position 711 through the display control function 445. At this time, the illumination range 71 is changed so that the changed center position 711 becomes the center of the field of view while maintaining the selected fixed field of view size (step S104). As a result, the illumination range 71 moves in parallel as shown in FIG.

[0061] When the irradiation range 71 is changed, the processing circuitry 44 updates the display image (step S105). At this time, the processing circuitry 44 controls the driving of the X-ray aperture by the X-ray control function 443, the image generation function 444, and the display control function 445 to irradiate X-rays only onto the updated irradiation range 71 to generate an X-ray image, and updates the display image to the generated X-ray image.

[0062] Next, the user changes the visual field size of the display screen to match the range he or she wishes to confirm by operating visual field size operation unit 433. For example, the visual field size of the display screen can be changed to any size by moving the slide bar in FIG. 2 provided as visual field size operation unit 433 by any length.

[0063] When an operation to change the visual field size is performed in visual field size operation unit 433 (step S106-Yes), processing circuit 44 changes illumination range 71 in accordance with the change in visual field size using display control function 445. At this time, illumination range 71 is changed to a size that matches the changed visual field size while maintaining center position 711 of the current display image (step S107). This allows illumination range 71 to be reduced to match the visual field size of target position 72 to be confirmed, as shown in FIG.

[0064] During X-ray imaging, whenever the position to be confirmed changes, the user can change the irradiation range 71 to any position by operating the center position operation unit 432 or the field of view size operation unit 433, thereby allowing the user to display an X-ray image at any position on the display 42. At this time, when the field of view size is changed, zooming in or out can be performed while maintaining the center position 711 of the currently displayed irradiation range 71, which facilitates the operation of adjusting the field of view of the displayed image to the target position 72. Therefore, the user can easily confirm the desired position.

[0065] The processing circuitry 44 executes the processing of steps S103 to S108 each time an operation is performed on the center position operation unit 432 or the field of view size operation unit 433 until the X-ray imaging is completed, thereby updating the displayed X-ray image to the X-ray image of the updated target position 72.

[0066] The effects of the X-ray diagnostic apparatus 1 according to this embodiment will be described below.

[0067] The X-ray diagnostic apparatus 1 of this embodiment includes an X-ray tube that generates X-rays, an X-ray detector 13 that detects X-rays, a first operation unit that operates the center position of a display image to be displayed on a display 42, and a second operation unit that operates the field of view size of the display image to be displayed on the display 42 in a stepless manner. The first operation unit is, for example, the center position operation unit 432 in FIG. 2. The second operation unit is, for example, the field of view size operation unit 433 in FIG. 2. The first operation unit and the second operation unit are provided in a console device 40. In addition, the console device 40 of the X-ray diagnostic apparatus 1 generates an X-ray image based on the X-rays detected by the X-ray detector 13, displays the generated X-ray image on the display 42, and can change the field of view size of the display image while maintaining the center position of the current display image according to the operation of the second operation unit. In addition, the X-ray diagnostic apparatus 1 further includes an X-ray aperture that limits the irradiation range of X-rays, and controls the irradiation range according to the operation of the first operation unit or the second operation unit.

[0068] For example, assume that the user performs an operation to enlarge (zoom out) the field of view size or to reduce (zoom in) the field of view size in order to confirm a target position such as a region of interest, on the field of view size operation unit 433. At this time, in response to the operation of the field of view size operation unit 433, the X-ray diagnostic apparatus 1 can enlarge (zoom out) or reduce (zoom in) the display image while maintaining the center position of the currently displayed display image.

[0069] Furthermore, the X-ray diagnostic apparatus 1 of this embodiment can change the field of view size of the X-ray image to be displayed to any size in a stepless manner by operating the field of view size operation unit 433. Therefore, the user can freely set the field of view size of the X-ray image to be displayed without being limited to several fixed fields of view sizes preset in advance.

[0070] Furthermore, when the field of view size is changed, zooming in or out can be performed while maintaining the center position 711 of the currently displayed irradiation range 71. This makes it easier to adjust the display range to the target position 72 compared to a case where the field of view size can only be selected from a plurality of preset fixed field of view sizes and the field of view size can only be changed around the center position of the detector installation range 70. Therefore, the user can easily confirm the desired position.

[0071] In this way, in the X-ray diagnostic device 1 that can freely adjust the X-ray irradiation range in the X-ray detector 13 by asymmetric control of the X-ray aperture, the field of view range of the displayed image can be easily adjusted to a target position desired by the user. This allows for more flexible field of view manipulation, improving the efficiency of examination.

[0072] The display range of the display image may be adjusted more finely. In this case, for example, as shown in FIG. 8, a third operation unit is further provided that can individually adjust the opening of the X-ray aperture corresponding to the top and bottom of the X-ray image and the opening of the X-ray aperture corresponding to the left and right of the X-ray image. The third operation unit is realized by, for example, an operation lever or a button. By operating the third operation unit, the field size corresponding to the top and bottom of the X-ray image of the display image and the field size corresponding to the left and right of the X-ray image can be separately adjusted. The processing circuit 44 controls the X-ray aperture based on the operation of the third operation unit by the drive control function 442. This makes it possible to adjust the display range of the display image to a desired shape, and further makes it possible to set an appropriate irradiation range. Furthermore, the processing circuit 44 controls the X-ray aperture, which has been moved and controlled in accordance with the display range of the display image, to be further moved based on the operation of the third operation unit by the drive control function 442. This makes it possible to set the relative opening to the display range with the display range being set to 100%. 8 shows an example in which the horizontal field of view size is reduced to 50% and the horizontal field of view size is reduced to 70%. Note that, as an example of the third operation unit, an example in which the opening degree in the vertical direction of the X-ray image and the opening degree in the horizontal direction of the X-ray image are individually adjusted has been described, but the embodiment is not limited to this, and only the opening degree in the vertical direction of the X-ray aperture may be individually adjusted. Similarly, only the opening degree in the horizontal direction of the X-ray aperture may be individually adjusted.

[0073] Second embodiment The second embodiment will be described. In this embodiment, the configuration of the first embodiment is modified as follows. In this embodiment, two images, an enlarged image in which the target position is enlarged and an overall image in which the range including the X-ray irradiation range is displayed, are displayed on the display 42. This method is an effective display method when, for example, it is desired to enlarge and check the periphery of a device while viewing the overall image. In addition, in the first embodiment, the X-ray irradiation range is narrowed to match the target position using an X-ray aperture, but in this embodiment, the target position is enlarged and displayed by image processing without narrowing the irradiation range. Descriptions of the configuration, operation, and effects similar to those of the first embodiment will be omitted.

[0074] In this embodiment, in the display control function 445, the processing circuitry 44 displays two images on one screen of the display 42: an entire image of the field of view including the irradiation range 71, and an enlarged image obtained by enlarging a part of the entire image by image processing. The entire image is, for example, an X-ray image including the irradiation range 71. The enlarged image is, for example, an X-ray image obtained by enlarging a desired target position such as a region of interest in the entire image by image processing. At this time, the processing circuitry 44 generates the enlarged image by controlling the irradiation range according to the field of view of the entire image and executing image processing to enlarge the target position with respect to the entire image. In addition, when the field of view size is changed by the second operation unit, the processing circuitry 44 changes the magnification ratio of the enlarged image by changing the field of view size of the enlarged image while maintaining the center position of the current enlarged image.

[0075] The processing circuit 44 executes two modes, a whole image operation mode for manipulating the viewing range of the whole image and an enlarged image operation mode for manipulating the viewing range of the enlarged image, by the display control function 445. The whole image operation mode corresponds to the first operation mode. The enlarged image operation mode corresponds to the second operation mode. For example, the processing circuit 44 switches from the whole image operation mode to the enlarged image operation mode based on an operation being performed on the second operation unit. It should be noted that the processing circuit 44 may be provided with a fourth operation unit for switching between the whole image operation mode and the enlarged image operation mode. The fourth operation unit is realized by, for example, a switch, a lever, a button, or the like.

[0076] Next, the operation of the X-ray diagnostic apparatus 1 according to this embodiment will be described. Fig. 9 is a flow chart showing an example of the procedure of processing executed by the processing circuitry 44 in X-ray photography. Note that the procedure of processing described below is merely an example, and each process may be modified as much as possible. Also, for the procedure of processing described below, steps may be omitted, replaced, or added as appropriate depending on the embodiment.

[0077] Fig. 10 is a diagram showing an example of a display screen displayed on the display 42 in this embodiment. As shown in Fig. 10, in this embodiment, the display 42 displays an overall display section 421 and an enlarged display section 422. The overall display section 421 displays an X-ray image having a field of view range including the irradiation range 71 as an overall image. The enlarged display section 422 displays an X-ray image obtained by enlarging a part of the image displayed on the overall display section 421 through image processing as an enlarged image.

[0078] When X-ray photography is to be started, the X-ray diagnostic apparatus 1 starts X-ray photography using the imaging device 10 in response to a user's operation of the start button 431 in Fig. 2. When X-ray photography is started, the processing circuitry 44 first starts an entire image operation mode for manipulating the position and field of view size of the entire image displayed on the entire display section 421.

[0079] In the whole image operation mode, the user first selects one fixed field of view size from a plurality of preset fixed field of view sizes. When the fixed field of view size is selected, the processing circuitry 44 determines the irradiation range 71 based on the selected fixed field of view size (step S201) in the same manner as the processing of steps S101 and S102 in the first embodiment, and displays the generated X-ray image by limiting the X-ray irradiation range to the irradiation range 71 on the display 42 (step S202). At this time, the generated X-ray image is displayed on the whole display unit 421 as a whole image.

[0080] In the whole image operation mode, the user can update the position of the whole image displayed on the whole display section 421 in real time by operating the center position operation section 432. When an operation to change the center position 711 is performed on the center position operation section 432 (step S203-Yes), the processing circuit 44 changes the irradiation range 71 according to the change of the center position 711 by the display control function 445. At this time, the irradiation range 71 can be changed so that the changed center position 711 becomes the center of the field of view of the whole display section 421 while maintaining the selected fixed field of view size (step S204). When the irradiation range 71 is changed, the processing circuit 44 updates the whole image displayed on the whole display section 421 (step S205). The processing of steps S203-S205 is similar to the processing of steps S103-S105 in the first embodiment, and therefore detailed description will be omitted.

[0081] When a user wishes to enlarge and display a portion of the entire image displayed in the entire display section 421, the user performs an operation to switch to an enlarged image operation mode for manipulating the field of view range of the enlarged image to be displayed in the enlarged display section 422. For example, the entire image operation mode can be switched to the enlarged image operation mode by performing an operation on the field of view size operation section 433. Note that a separate button for switching between the entire image operation mode and the enlarged image operation mode may be provided.

[0082] When an operation is performed on the view size operation unit 433 during execution of the whole image operation mode (step S206-Yes), the processing circuit 44 transitions to an enlarged image operation mode for operating the position and view size of the enlarged image displayed on the enlarged display unit 422. After that, the processing circuit 44 starts displaying the enlarged image on the enlarged display unit 422 by the display control function 445 (step S207). At this time, as shown in Fig. 10, it is preferable to display the view range 73 of the enlarged image, the center position 731 of the enlarged image, and the center position 711 of the whole image on the whole image of the whole display unit 421 so that the positional relationship of the view range of the enlarged image can be grasped.

[0083] In the enlarged image operation mode, the user can change the viewing range 73 of the enlarged image in real time every time the target position to be confirmed changes by operating the center position operation unit 432 or the viewing size operation unit 433. Every time an operation is performed on the center position operation unit 432 or the viewing size operation unit 433, the processing circuit 44 changes the viewing range 73 of the enlarged image by the display control function 445 (step S208), and updates the enlarged image displayed on the enlarged display unit 422 by executing image processing based on the changed viewing range 73.

[0084] For example, the user can change the center position 731 of the enlarged image by operating the center position operation unit 432. At this time, the processing circuitry 44 generates an enlarged image centered on the changed position and maintaining the field of view size of the current enlarged image by executing image processing on the X-ray image displayed on the whole display unit 421, and updates the enlarged image to be displayed on the enlarged display unit 422 to the generated image.

[0085] Furthermore, the user can change the field of view size of the enlarged image displayed in the enlarged display section 422 by operating the field of view size operation section 433. At this time, the processing circuit 44 maintains the center position 731 of the current enlarged image, generates an enlarged image having the changed field of view size by executing image processing on the entire image, and updates the enlarged image in the enlarged display section 422 to the generated image. For example, in the state shown in Fig. 6, when the field of view size is changed to match the target position 72 by operating the field of view size operation section 433, the magnification ratio of the enlarged image is changed without changing the irradiation range 71, and the enlarged image is displayed in the enlarged display section 422, as shown in Fig. 11.

[0086] Note that, by performing an operation to change the center position or field size of the field of view 73 of the enlarged image, the field of view 73 of the enlarged image may move to a position beyond the irradiation range 71, as shown in Fig. 11. In this case, the portion of the field of view 73 of the enlarged image that protrudes beyond the irradiation range 71 is blocked by the X-ray aperture, so it is necessary to change the irradiation range 71. Therefore, when the field of view 73 of the enlarged image is changed to a position including an area outside the irradiation range 71 by the drive control function 442, the processing circuitry 44 changes the irradiation range 71 to a range including the field of view 73 of the enlarged image.

[0087] For example, the processing circuitry 44 moves the irradiation range 71 so as to include the field of view 73 of the enlarged image, as shown in Fig. 12. This causes the entire field of view 73 of the enlarged image to be irradiated with X-rays, and an X-ray image of the part that the user wants to check can be generated and displayed.

[0088] 13, the irradiation range 71 may be expanded to include the field of view 73 of the enlarged image. When the irradiation range 71 is changed, the X-ray irradiation range is changed according to the irradiation range 71, and the X-ray aperture is driven according to the X-ray irradiation range. As a result, X-rays are irradiated over the entire field of view 73 of the enlarged image, and an X-ray image of the part that the user wants to check can be generated and displayed.

[0089] Furthermore, by performing an operation to change the center position or field size of the field of view 73 of the enlarged image, the field of view 73 of the enlarged image may move to a position beyond the detector installation range 70, as shown in Fig. 14. In this case, the X-ray detector 13 is not present in the portion of the field of view 73 of the enlarged image that extends beyond the detector installation range 70. For this reason, when the display control function 445 changes the field of view 73 of the enlarged image to a position that includes an area outside the installation range of the X-ray detector 13, the processing circuitry 44 changes the field of view 73 of the enlarged image so that it is included in the installation range of the X-ray detector 13.

[0090] 15, the center position 711 and field of view size of the enlarged image are changed so that they do not exceed the detector installation range 70. This causes X-rays to be irradiated over the entire field of view range 73 of the enlarged image, and an X-ray image of the part that the user wants to check can be generated and displayed within the range where the X-ray detector 13 is present.

[0091] Alternatively, the processing circuitry 44 may display the portion of the field of view 73 of the enlarged image that protrudes outside the detector installation range 70 in gray or the like without changing the field of view 73 of the enlarged image, as shown in Fig. 16. In Fig. 16, the enlarged image in the enlarged display section 422 displays an X-ray image in the area that overlaps with the detector installation range 70, and the area 722 that protrudes outside the detector installation range 70 is displayed in gray.

[0092] When the viewing range 73 of the enlarged image exceeds the detector installation range 70, the X-ray detector 13 itself may be moved so that the viewing range 73 of the enlarged image is included in the detector installation range 70.

[0093] Also, it may be possible to prevent an operation of moving the viewing range 73 of the enlarged image to a position beyond the irradiation range 71 or the detector installation range 70. Furthermore, when the viewing range 73 of the enlarged image reaches the end of the irradiation range 71 or the detector installation range 70, the user may be notified by voice or on-screen display that the limit of operation has been reached.

[0094] The processing circuit 44 updates the enlarged image displayed in the enlarged display unit 422 by repeatedly executing the processing of steps S208-S209 each time an operation is performed on the center position operation unit 432 or the field of view size operation unit 433 until the X-ray imaging is completed (step S210-No).

[0095] The effects of the X-ray diagnostic apparatus 1 according to this embodiment will be described below.

[0096] The X-ray diagnostic apparatus 1 of this embodiment can display an entire image including the irradiation range 71 and an enlarged image obtained by enlarging a part of the entire image on the display 42. For example, the entire image is an X-ray image including the entire irradiation range 71, and the enlarged image is an X-ray image obtained by enlarging and displaying a target position in the entire image. The entire image is generated by controlling the irradiation range 71 according to the field of view of the entire image, and the enlarged image is generated by performing image processing on the entire image.

[0097] Furthermore, the X-ray diagnostic apparatus 1 can execute an entire image operation mode for manipulating the field of view of the entire image, and an enlarged image operation mode for manipulating the field of view 73 of the enlarged image. The entire image operation mode corresponds to the first operation mode, and the enlarged image operation mode corresponds to the second operation mode. The first operation unit functions as an interface for manipulating the center position of the entire image in the entire image operation mode, and functions as an interface for manipulating the center position of the enlarged image in the enlarged image operation mode. The second operation unit functions as an interface for switching from the entire image operation mode to the enlarged image operation mode, and functions as an interface for steplessly manipulating the field of view size of the enlarged image in the enlarged image operation mode.

[0098] By simultaneously checking the enlarged image in which the target position is enlarged and the overall image including the entire irradiation range 71, the user can easily grasp the position of the viewing range 73 of the enlarged image within the irradiation range 71. This makes it even easier to align the viewing range 73 of the enlarged image with the target position desired by the user. This allows for more flexible viewing operation, further improving inspection efficiency.

[0099] Also in this embodiment, in both the whole image operation mode and the enlarged image operation mode, when an operation to change the field of view size is input in the second operation unit, the display image can be enlarged (zoomed out) or reduced (zoomed in) while maintaining the current center position, and the field of view size of the display image can be changed to any size in a stepless manner. Therefore, the user can freely set the field of view range of the display image without being limited to a fixed field of view size of several steps that are preset in advance.

[0100] 17, an X-ray image including the entire detector installation range 70 may be displayed as the entire image on the entire display unit 421. In Fig. 17, in the detector installation range 70, an X-ray image is displayed in an irradiation range 71, and the area where the X-rays are blocked by the X-ray aperture is displayed in gray.

[0101] In addition, the overall display unit 421 may further display a schematic diagram such as a cartoon that simply indicates the positional relationship between the detector installation range 70, the irradiation range 71, the field of view range 73 of the enlarged image, the center position 731 of the field of view range 73, and the like. In this case, an image obtained by a visible light camera, a schematic image simulating the current arrangement by a camera or the like, or an actual X-ray image may be displayed in the background of the schematic diagram. In this case, it is possible to grasp the positional relationship more accurately. In addition, an LIH image generated by a last image hold (LIH) function may be used as the X-ray image displayed as the background. In this case, when an operation is performed to enlarge (zoom out) or reduce (zoom in) the field of view size of the LIH image displayed on the overall display unit 421, the field of view range that is to be changed by the operation is cut out from the LIH image in advance and displayed on the enlarged display unit 422, making it easy to understand what kind of image will be acquired by the operation, and the display position can be adjusted without irradiating X-rays.

[0102] In addition, in the enlarged image operation mode, the timing of performing image processing may be adjusted as appropriate. For example, an image generated using a simple digital zoom may be displayed on the enlarged display unit 422 until the field of view size of the enlarged image is determined, and image processing may be performed to enlarge the target position after the field of view size of the enlarged image is determined.

[0103] In addition, it is also possible to appropriately adjust the timing of performing partial readout on the X-ray detector 13. For example, when fluoroscopy ends, an optimal partial readout may be applied.

[0104] Furthermore, the type and content of image processing to be executed may be changed for the entire image and the enlarged image.

[0105] (Modification) In the embodiment, an example has been described in which the center position of the display image is changed using the first operation unit or the second operation unit after the fixed field of view size is selected, but the step of selecting the fixed field of view size may be omitted. In this case, when the X-ray image of the selected fixed field of view size is displayed, instead, an X-ray image generated with the detector installation range 70 as the irradiation range 71 is displayed.

[0106] In order to compensate for the heel effect, the X-ray conditions may be controlled so that the peak of the X-ray intensity distribution coincides with the center position of the displayed image.

[0107] In addition, the target position 72 and the viewing range 73 of the enlarged image may be used as the range used for calculating the dose setting in the ABC (Automatic Brightness Control) function and the AEC (Automatic Exposure Control) function. In this case, a more appropriate dose setting can be performed by setting the dose for the area that the user really wants to see. In addition, the target position 72 and the viewing range 73 of the enlarged image adjusted using the results of the segmentation process may be used as the range used for calculating the dose setting.

[0108] According to at least one of the embodiments described above, it is possible to provide free and easy field of view manipulation during X-ray imaging.

[0109] 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.

[0110] Regarding the above embodiment, the following supplementary notes are disclosed as one aspect and optional features of the invention. (Appendix 1) an X-ray tube for generating X-rays; An X-ray detector for detecting the X-rays; an image generating unit that generates an X-ray image based on the detected X-rays; a display control unit that displays the X-ray image on a display unit; a first operation unit that receives an operation to input a center position of a display image to be displayed on the display unit; A second operation unit that accepts an operation of inputting a visual field size of the display image in a stepless manner; Equipped with When the field of view size is changed by the second operation unit, the display control unit changes the field of view size of the display image while maintaining a center position of the current display image. X-ray diagnostic equipment. (Appendix 2) The X-ray diagnostic apparatus may further include an X-ray aperture that limits an irradiation range of the X-rays, and a drive control unit that controls driving of the X-ray aperture, and the drive control unit may control the irradiation range in response to an operation of the first operation unit or the second operation unit. (Appendix 3) The X-ray aperture may be configured with four aperture blades, and the drive control unit may control the irradiation range by individually moving positions of the four aperture blades. (Appendix 4) The X-ray diagnostic apparatus may further include a third operation unit that accepts an operation to separately input an opening degree of the X-ray aperture corresponding to the top and bottom of the X-ray image and an opening degree of the X-ray aperture corresponding to the left and right of the X-ray image, and the drive control unit may control the X-ray aperture based on the operation of the third operation unit. (Appendix 5) The second operation unit may be an operation unit that is capable of receiving a movement operation by a user, and may receive an input of the field of view size based on the movement operation by the user. (Appendix 6) The second operation unit is an operation unit that enables a user to accept a movement operation, and may accept an input regarding a reduction in the field of view size in response to a movement operation by the user in a first direction, and may accept an input regarding an increase in the field of view size in response to a movement operation by the user in a direction opposite to the first direction. (Appendix 7) The second operation unit may be a slide bar, and may receive an input of a visual field size according to an amount by which the user moves the slide bar. (Appendix 8) The second operation unit may receive an operation to cancel input of a visual field size, in addition to the operation to input a visual field size. (Appendix 9) The second operation unit may be a button provided on the first operation unit, and the display control unit may determine the amount of change in the field of view size of the display image depending on the user's pressing of the button and the input operation on the first operation unit. (Appendix 10) The display control unit may cause the display unit to display an entire image including the X-ray irradiation range and an enlarged image obtained by enlarging a part of the entire image. (Appendix 11) The X-ray diagnostic apparatus may further include an X-ray aperture that limits an irradiation range of the X-rays, and a drive control unit that controls driving of the X-ray aperture, wherein the drive control unit controls the irradiation range in accordance with a field of view range of the entire image, and the display control unit generates the enlarged image by image processing of the entire image. (Appendix 12) The display control unit may execute a first operation mode in which a viewing range of the entire image is manipulated, and a second operation mode in which a viewing range of the enlarged image is manipulated. (Appendix 13) The display control unit may switch from the first operation mode to the second operation mode based on an operation being executed on the second operation unit. (Appendix 14) When the viewing range of the enlarged image is changed to a position including an area outside the illumination range, the drive control unit may change the illumination range to a range including the viewing range of the enlarged image. (Appendix 15) When the field of view of the enlarged image is changed to a position that includes an area outside the installation range of the X-ray detector, the display control unit may change the field of view of the enlarged image so that it is included in the installation range of the X-ray detector. (Appendix 16) a display control unit that displays the X-ray image on a display unit; a first operation unit that receives an operation to input a center position of a display image that is an X-ray image displayed on the display unit; A second operation unit that accepts an operation of inputting a visual field size of the display image in a stepless manner; Equipped with The display control unit changes the field of view size of the display image in response to an operation of the second operation unit while maintaining a center position of the current display image. Console device. (Appendix 17) The console device may further include an X-ray aperture that limits the irradiation range of X-rays, and a drive control unit that controls the drive of the X-ray aperture, and the drive control unit may control the irradiation range in response to operation of the first operation unit or the second operation unit. (Appendix 18) The second operation unit may be an operation unit that is capable of receiving a movement operation by a user, and may receive an input of the field of view size based on the movement operation by the user. (Appendix 19) The second operation unit is an operation unit that enables a user to accept a movement operation, and may accept an input regarding a reduction in the field of view size in response to a movement operation by the user in a first direction, and may accept an input regarding an increase in the field of view size in response to a movement operation by the user in a direction opposite to the first direction. (Appendix 20) The second operation unit may be a slide bar, and may receive an input of a visual field size according to an amount by which the user moves the slide bar. (Appendix 21) The second operation unit may receive an operation to cancel input of a visual field size, in addition to the operation to input a visual field size. (Appendix 22) The second operation unit may be a button provided on the first operation unit, and the display control unit may determine the amount of change in the field of view size of the display image depending on the user's pressing of the button and the input operation on the first operation unit. [Explanation of symbols]

[0111] 1. X-ray diagnostic equipment 10. Shooting device 11...High voltage generator 12…X-ray generating section 13…X-ray detector 14…C-arm 142…C-arm drive unit 30...Bedroom equipment 31… Foundation 32...Bed drive unit 33…Tabletop 34…Support frame 40...Console device 41…Memory 42…Display 421...Whole display area 422…Enlarged display section 43...Input interface 431…Start button 432...Center position operation section 433…Field of view size control section 44...Processing circuit 441…System control function 442…Drive control function 443…X-ray control function 444…Image generation function 445…Display control function 70…Detector installation range 71…Irradiation range 711…Center position 72…Target position 73…Field of view 731…Center position

Claims

1. An X-ray tube that generates X-rays; an X-ray detector for detecting the X-rays; an image generating unit that generates an X-ray image based on the detected X-rays; a display control unit that causes the X-ray image to be displayed on a display unit; a first operation unit that receives an operation for inputting a center position of a display image to be displayed on the display unit; A second operation unit that accepts an operation of inputting a visual field size of the display image in a stepless manner; Equipped with The display control unit changes the field of view size of the display image in response to an operation of the second operation unit while maintaining a center position of the current display image. X-ray diagnostic equipment.

2. an X-ray aperture for limiting an irradiation range of the X-rays; A drive control unit that controls the drive of the X-ray aperture, The drive control unit controls the irradiation range in response to an operation of the first operation unit or the second operation unit.

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

3. The X-ray aperture is composed of four aperture blades, The drive control unit controls the irradiation range by individually moving positions of the four diaphragm blades.

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

4. a third operation unit that receives an operation of separately inputting an opening degree of an X-ray aperture corresponding to the top and bottom of the X-ray image and an opening degree of an X-ray aperture corresponding to the left and right of the X-ray image; The drive control unit controls the X-ray aperture based on an operation of the third operation unit.

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

5. The second operation unit is an operation unit that allows a user to perform a movement operation, and receives an input of the field of view size based on the user's movement operation.

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

6. the second operation unit is an operation unit that allows a user to accept a movement operation, and accepts an input regarding a reduction in the field of view size in response to a movement operation by the user in a first direction, and accepts an input regarding an increase in the field of view size in response to a movement operation by the user in a direction opposite to the first direction; 3. The X-ray diagnostic apparatus according to claim 2.

7. the second operation unit is a slide bar and receives an input of a visual field size according to an amount by which the user moves the slide bar; 2. The X-ray diagnostic apparatus according to claim 1.

8. The second operation unit accepts an operation of canceling the input of the visual field size in addition to the operation of inputting the visual field size.

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

9. the second operation unit is a button provided on the first operation unit, the display control unit determines an amount of change in the visual field size of the display image in response to a press of the button by a user and an input operation on the first operation unit.

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

10. the display control unit causes the display unit to display an entire image including the X-ray irradiation range and an enlarged image obtained by enlarging a part of the entire image.

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

11. an X-ray aperture for limiting an irradiation range of the X-rays; A drive control unit that controls the drive of the X-ray aperture, the drive control unit controls the illumination range in accordance with a viewing range of the entire image, the display control unit generates the enlarged image by performing image processing on the entire image. The X-ray diagnostic apparatus according to claim 10.

12. the display control unit executes a first operation mode in which a viewing range of the entire image is manipulated, and a second operation mode in which a viewing range of the enlarged image is manipulated. The X-ray diagnostic apparatus according to claim 10.

13. The display control unit switches from the first operation mode to the second operation mode based on an operation being executed on the second operation unit.

13. The X-ray diagnostic apparatus according to claim 12.

14. when the viewing range of the enlarged image is changed to a position including an area outside the illumination range, the drive control unit changes the illumination range to a range including the viewing range of the enlarged image.

12. The X-ray diagnostic apparatus according to claim 11.

15. when the field of view of the enlarged image is changed to a position including an area outside an installation range of the X-ray detector, the display control unit changes the field of view of the enlarged image so that the field of view is included in the installation range of the X-ray detector.

12. The X-ray diagnostic apparatus according to claim 11.

16. a display control unit that displays the X-ray image on a display unit; a first operation unit that receives an operation to input a center position of a display image that is an X-ray image displayed on the display unit; A second operation unit that accepts an operation of inputting a visual field size of the display image in a stepless manner; Equipped with The display control unit changes the field of view size of the display image in response to an operation of the second operation unit while maintaining a center position of the current display image. Console device.

17. an X-ray aperture for limiting an irradiation range of X-rays; A drive control unit that controls the drive of the X-ray aperture, The drive control unit controls the irradiation range in response to an operation of the first operation unit or the second operation unit. The console device according to claim 16.

18. The second operation unit is an operation unit that allows a user to perform a movement operation, and receives an input of the field of view size based on the user's movement operation. The console device according to claim 17.

19. the second operation unit is an operation unit that allows a user to accept a movement operation, and accepts an input regarding a reduction in the field of view size in response to a movement operation by the user in a first direction, and accepts an input regarding an increase in the field of view size in response to a movement operation by the user in a direction opposite to the first direction; The console device according to claim 17.

20. the second operation unit is a slide bar and receives an input of a visual field size according to an amount by which the user moves the slide bar; The console device according to claim 16.

21. The second operation unit accepts an operation of canceling the input of the visual field size in addition to the operation of inputting the visual field size. The console device according to claim 17.

22. the second operation unit is a button provided on the first operation unit, the display control unit determines an amount of change in the visual field size of the display image in response to a press of the button by a user and an input operation on the first operation unit. The console device according to claim 16.

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