X-ray diagnostic apparatus and method for controlling X-ray diagnostic apparatus

Abstract

The disclosed embodiments relate to an X-ray diagnostic apparatus and a method for controlling the X-ray diagnostic apparatus. With a simple configuration, it is possible for a user to easily visually confirm a lighting field for AEC in an X-ray diagnostic device. According to one embodiment, an X-ray diagnostic device is provided with an X-ray tube, an X-ray detection panel, a selection setting unit, and a daylighting field projection unit. The X-ray detection panel detects X-rays irradiated from the X-ray tube and transmitted through a subject. A selection setting unit selects one or a plurality of lighting fields from among a plurality of lighting fields for an AEC (Automation Exposure Control) provided in an X-ray detection panel, or sets the one or the plurality of lighting fields for the AEC in the X-ray detection panel. The daylighting field projection unit projects information indicating the selected or set region of the one or more daylighting fields onto the subject using visible light so as to be visually recognizable.

Description

[0001] This application is based on Japanese Patent Application No. 2023-217973 (filing date: December 25, 2023) and Japanese Patent Application No. 2024-214378 (filing date: December 9, 2024), and claims priority benefits from these applications. This application incorporates the entire contents of these applications by reference thereto. Technical Field

[0002] The embodiments disclosed in this specification and the accompanying drawings relate to an X-ray diagnostic apparatus and a control method for an X-ray diagnostic apparatus. Background Art

[0003] X-ray diagnostic apparatuses include various types such as a general X-ray imaging apparatus and an X-ray TV apparatus. Among these apparatuses, the general X-ray imaging apparatus is an apparatus that performs X-ray imaging of, for example, the chest with a relatively simple structure. In addition, the X-ray TV apparatus is configured to be able to acquire an X-ray fluoroscopic image as a dynamic image in addition to being able to acquire an X-ray imaging image as a static image, so as to be able to perform image-guided treatment, that is, IVR (Interventional Radiology), using medical devices such as a catheter.

[0004] These X-ray diagnostic apparatuses generally have an automatic exposure control function, that is, an AEC (Automatic Exposure Control) function. With the AEC function, in addition to being able to generate an X-ray fluoroscopic image and an X-ray imaging image (hereinafter, both are collectively referred to as an X-ray image) as an appropriately exposed image, it is also possible to suppress radiation to the subject.

[0005] In order to implement the AEC function, a light-receiving field for detecting the amount of X-rays is provided in an irradiation field, which is an area where X-rays are irradiated to generate an X-ray image.

[0006] The light-receiving field is preferably set in the imaging target area of the subject, in other words, within the region of interest (ROI; Region Of Interest) of the subject. One or more existing light-receiving fields are provided at specified positions on an X-ray detection panel (for example, an FPD: Flat Panel Detector), and marks indicating the position and size of the light-receiving field are marked on the surface of the X-ray detection panel.

[0007] In addition, there is also an X-ray diagnostic apparatus configured to be able to select a desired light-receiving field from a plurality of pre-set light-receiving fields by a user such as a radiographer in consideration of the positional relationship with the ROI.

[0008] However, when positioning and imaging the subject, the X-ray detection panel is hidden behind the subject (e.g., a patient), so users such as the imaging technician cannot confirm the position of the light field with respect to the ROI.

[0009] Therefore, there is also a known prior art in which the selected light field is overlapped and displayed with the camera image of the subject captured by a visible light camera. However, in this prior art, in addition to the visible light camera and the monitor device for displaying the camera image being necessary structures, depending on the type of surgery and the examination site, the patient sometimes refuses to be imaged with the visible light camera itself.

[0010] In addition, in a situation where the assistance of a user such as an imaging technician is required during the examination, it is inconvenient to confirm the light field displayed on the monitor device while assisting the patient. Summary of the Invention

[0011] One of the technical problems to be solved by the embodiments disclosed in this specification and the accompanying drawings is to enable a user to easily visually confirm the light field for AEC in an X-ray diagnostic apparatus with a simple structure. However, the technical problems to be solved by the embodiments disclosed in this specification and the accompanying drawings are not limited to the above technical problems. Technical problems corresponding to the respective effects of the respective structures shown in the following embodiments can also be defined as other technical problems.

[0012] An X-ray diagnostic apparatus according to an embodiment includes an X-ray tube, an X-ray detection panel, a selection setting unit, and a light field projection unit. The X-ray detection panel detects X-rays that are irradiated from the X-ray tube and transmitted through the subject. The selection setting unit selects one or more light fields for AEC (Automatic Exposure Control) provided in the X-ray detection panel, or sets one or more light fields for the AEC in the X-ray detection panel. The light field projection unit projects information indicating the area of the selected or set one or more light fields onto the subject using visible light in a visually confirmable manner.

[0013] A control method of an X-ray diagnostic apparatus according to an embodiment is a control method of an X-ray diagnostic apparatus including at least an X-ray tube and an X-ray detection panel that detects X-rays irradiated from the X-ray tube and transmitted through the subject. The control method of the X-ray diagnostic apparatus selects one or more light fields for AEC, i.e., automatic exposure control, provided in the X-ray detection panel, or sets one or more light fields for the AEC in the X-ray detection panel, and projects information indicating the area of the selected or set one or more light fields onto the subject using visible light in a visually confirmable manner.

[0014] An X-ray diagnostic apparatus and a control method thereof according to the above structure can enable a user to easily visually confirm a light-receiving field for AEC in the X-ray diagnostic apparatus with a simple structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is an external view showing a structural example of the X-ray diagnostic apparatus according to the first embodiment.

[0016] Figure 2 In (a), it is a block diagram showing a structural example of the X-ray diagnostic apparatus according to the first embodiment, and in (b), it is a diagram schematically showing the positional relationship between the light-receiving field projection light and the irradiation field projection light when observing a subject from the X-ray tube.

[0017] Figure 3 In (a), it is an explanatory diagram showing an example when the light-receiving field projection device is provided outside the X-ray irradiation housing, and in (b), it is an explanatory diagram showing an example when the light-receiving field projection device is provided inside the X-ray irradiation housing.

[0018] Figure 4 is a flowchart showing an example of the processing flow or operation flow of the X-ray diagnostic apparatus according to the first embodiment.

[0019] Figure 5 is a diagram showing the operation concept of the X-ray diagnostic apparatus according to the first embodiment.

[0020] Figure 6 is a flowchart showing an example of the processing flow or operation flow of the X-ray diagnostic apparatus according to a modification of the first embodiment.

[0021] Figure 7 is a diagram showing the operation concept of the X-ray diagnostic apparatus according to a modification of the first embodiment.

[0022] Figure 8 In (a), it is a block diagram showing a structural example of the X-ray diagnostic apparatus according to the second embodiment, and in (b), it is a diagram schematically showing the positional relationship between the light-receiving field projection light and the irradiation field projection light when observing a subject from the X-ray tube.

[0023] Figure 9 is a flowchart showing an example of the processing flow or operation flow of the X-ray diagnostic apparatus according to the second embodiment.

[0024] Figure 10 is a diagram showing the operation concept of the X-ray diagnostic apparatus according to the second embodiment.

[0025] Figure 11In (a), it is a block diagram showing a structural example of an X-ray diagnostic apparatus according to a third embodiment, and in (b), it is a diagram schematically showing the positional relationship between the light collection field projection light and the irradiation field projection light when observing a subject from an X-ray tube.

[0026] Figure 12 It is a flowchart showing an example of a processing flow or an operation flow of an X-ray diagnostic apparatus according to a third embodiment.

[0027] Figure 13 It is a diagram showing an operation concept of an X-ray diagnostic apparatus according to a third embodiment.

[0028] Figure 14 It is a flowchart showing an example of a processing flow or an operation flow of an X-ray diagnostic apparatus according to a fourth embodiment.

[0029] Figure 15 It is a diagram showing an operation concept of an X-ray diagnostic apparatus according to a fourth embodiment.

[0030] Figure 16 In (a), it is a block diagram showing a structural example of an X-ray diagnostic apparatus according to a fifth embodiment, and in (b), it is a diagram schematically showing the positional relationship between the light collection field projection light and the irradiation field projection light when observing a subject from an X-ray tube.

[0031] Figure 17 It is a flowchart showing an example of a processing flow or an operation flow of an X-ray diagnostic apparatus according to a fifth embodiment.

[0032] Figure 18 It is a diagram showing an operation concept of an X-ray diagnostic apparatus according to a fifth embodiment. Detailed Embodiments

[0033] Hereinafter, embodiments of an X-ray diagnostic apparatus and a control method for an X-ray diagnostic apparatus will be described in detail with reference to the accompanying drawings.

[0034] Figure 1 It is an external view showing a structural example of an X-ray diagnostic apparatus 1 according to a first embodiment. Figure 1 The X-ray diagnostic apparatus 1 illustrated in the example is an ordinary X-ray imaging apparatus that performs pure X-ray imaging of the chest or the like, but the X-ray diagnostic apparatus 1 is not limited thereto. For example, it may include an X-ray TV apparatus capable of performing IVR. The X-ray diagnostic apparatus 1 includes, for example, an X-ray irradiation device 10, a lying position imaging table 20, and an upright position imaging table 30.

[0035] The X-ray irradiation device 10 is held by an X-ray tube holding device. The X-ray tube holding device has, for example, two types: a ceiling type X-ray tube holding device and a floor type X-ray tube holding device. Figure 1Shows an example of the appearance of a ceiling-mounted X-ray tube holding device. The ceiling-mounted X-ray tube holding device has a ceiling rail 200, and can move the position of the held X-ray irradiation device 10 in two orthogonal directions in parallel along the ceiling rail 200.

[0036] The upright radiographic table 30 is a device for photographing a subject P (such as a patient) in an upright position. The upright radiographic table 30 is provided with an X-ray detection panel 31 (see Figure 2 ). In addition, the X-ray detection panel 31 is configured to include, for example, an FPD (Flat Panel Detector). The X-ray irradiated from the X-ray tube 101 (see Figure 2 ) accommodated in the X-ray irradiation device 10 passes through the chest or the like of the subject P and is detected by the X-ray detection panel 31.

[0037] On the other hand, the lying radiographic table 20 is configured as an examination couch that can make the subject P lie horizontally on the top plate in a lying position for photographing. An X-ray detection panel 31 is also arranged under the top plate of the lying radiographic table 20. The X-ray irradiated from the X-ray tube 101 (see Figure 2 ) accommodated in the X-ray irradiation device 10 passes through the subject P on the top plate and is detected by the X-ray detection panel 31.

[0038] Figure 2 Figure (a) shows a block diagram of the structure example of the X-ray diagnostic apparatus 1 according to the first embodiment. Figure 2 The example of the X-ray diagnostic apparatus 1 shown in Figure (a) of

[0039] illustrates a structure having an upright radiographic table 30, and the lying radiographic table 20 is omitted. Hereinafter, the structure and function of the X-ray diagnostic apparatus 1 will be described using an example of photographing the subject P by the upright radiographic table 30, but these descriptions can also be applied to the case of photographing the subject P by the lying radiographic table 20. Figure 2 As illustrated in Figure (a) of

[0040] the X-ray diagnostic apparatus 1 has an X-ray irradiation device 10, an upright radiographic table 30, a control console 60, and a light field projection device 40.

[0041] The X-ray detection panel 31 has an X-ray detector such as an FPD, for example. An X-ray pixel signal for generating an X-ray image such as an X-ray fluoroscopic image or an X-ray radiographic image is output from the X-ray detection panel 31. The area in the region of the X-ray detection panel 31 that detects the X-ray transmitted through the subject P is called the irradiation field. In addition, in Figure 2 in (a) of, the area X-ray where the X-ray transmitted through the subject P irradiates the X-ray detection panel 31 is also illustrated. The area X-ray where the X-ray irradiates the X-ray detection panel 31 is substantially the same as the irradiation field, which is the area where the X-ray detection panel 31 detects the X-ray transmitted through the subject P.

[0042] An AEC X-ray signal for implementing the AEC function is also output from the X-ray detection panel 31. A plurality of areas called light collection fields are provided on the X-ray detection panel 31, and the X-ray signals detected in these light collection fields are output in real time as the AEC X-ray signals.

[0043] Figure 2 (b) of is a diagram schematically showing the positional relationship between the light collection field projection light L1 and the irradiation field projection light L2 when observing the subject P from the X-ray tube 101. The light collection field projection light L1 corresponds to the position and shape of the light collection field in the X-ray detection panel 31, and the irradiation field projection light L2 corresponds to the position and shape of the irradiation field (the area irradiated with X-rays) in the X-ray detection panel 31. As an initial state, a specified number of light collection fields are preset at specified positions within the irradiation field. In Figure 2 in (b) of, an example is shown in which nine light collection fields arranged in three rows and three columns are set as the initial state.

[0044] An AEC detection element for detecting the X-ray for AEC is disposed in each light collection field. These AEC detection elements can be integrally formed with the FPD in a state embedded in the FPD. Alternatively, these AEC detection elements can be configured as an external device separate from the FPD.

[0045] As described later, each of these light collection fields can be set to non-selection by a user's manual operation or by an automatic setting function of the device, and conversely, a light collection field that has been set to non-selection can be re-selected.

[0046] In addition, as described later, instead of adjusting the light collection field by the method of non-selecting and selecting a plurality of preset light collection fields, a structure in which one or more light collection fields having a desired shape are set in the X-ray detection panel 31 can also be adopted.

[0047] The control console 60 is configured to include at least a user interface 62, a display 63, and a processing circuit 61.

[0048] The user interface 62 includes user-operable input devices and an input circuit that inputs signals from the input devices. The input devices are implemented, for example, by an operation console, a joystick, a trackball mouse, a keyboard, a touch panel that performs input operations through a touch operation surface, a touch screen that integrates a display screen and a touchpad, a non-contact input circuit using an optical sensor, a sound input circuit, and the like.

[0049] The display 63 is constituted by a general display output device such as a liquid crystal display or an OLED (Organic Light Emitting Diode) display. In addition to displaying X-ray images such as X-ray fluoroscopic images and X-ray radiographic images generated by the processing circuit 61, the display 63 also displays various data. In addition, all or part of the X-ray images and data displayed on the display 63 can also be displayed on the touch panel or touch screen of the user interface 62.

[0050] The processing circuit 61 has one or more processors and a memory. Each function described later is implemented by software processing that executes a program stored in the memory. In addition to this, the processing circuit 61 can also be configured to implement each function by hardware processing performed by an FPGA (Field Programmable Gate Array) or an ASIC (Application Specific Integrated Circuit), etc., and can also implement each function by combining software processing and hardware processing.

[0051] As Figure 2 shown in (a) of , the processing circuit 61 implements functions such as an X-ray image generation function F01, a lighting field selection setting function F02, and an AEC function F03.

[0052] The X-ray image generation function F01 generates X-ray images such as X-ray fluoroscopic images and X-ray radiographic images based on X-ray pixel signals output from the X-ray detection panel 31. The generated X-ray images are displayed, for example, on the display 63.

[0053] The AEC function F03 performs AEC based on AEC X-ray signals output from the lighting fields of the X-ray detection panel 31. For example, values such as the average value or the maximum value of the AEC X-ray signals output from multiple lighting fields are accumulated. Moreover, when the accumulated value exceeds a specified threshold, it is indicated to the high-voltage power supply 102 to stop applying high voltage and stop the irradiation of X-rays. Through this AEC function, in addition to being able to generate an X-ray image as an appropriately exposed image, it is also possible to suppress the radiation to the subject.

[0054] The light field selection setting function F02 selects one or more light fields for AEC from a plurality of light fields for AEC provided in the X-ray detection panel 31, or sets one or more light fields for AEC in the X-ray detection panel 31. Information related to the light field selected or set by the light field selection setting function F02 is output as a light field control signal to the X-ray detection panel 31. In the X-ray detection panel 31, according to the light field control signal, the selection of the light field is cancelled and set to non-selection, or the non-selected light field is re-selected to adjust the light field. For a more specific operation of the light field selection setting function F02, see the following description.

[0055] The light field control signal generated by the light field selection setting function F02 is also sent to the light field projection device 40. The light field projection device 40 projects information on the area of one or more light fields selected or set by the light field selection setting function F02 onto the subject P in a visually recognizable manner using visible light, such as laser light. In the present embodiment, an example in which the light field projection light L1 is used as the information on the area of one or more light fields selected or set is described.

[0056] The light field projection device 40 includes, for example, a laser light source 42 and a projection control circuit 41. The laser light source 42 is arranged adjacent to the X-ray irradiation housing 100 that houses the X-ray tube 101. The projection control circuit 41 controls the opening and closing of each laser light source 42 so that the laser light emitted from the laser light source 42 is projected onto the subject P as the light field projection light L1 corresponding to the area of the selected or set light field. In addition, the light source that generates the light field projection light L1 is not limited to the laser light source 42, and any appropriate visible light source can be used. Further, when each laser light source 42 has a shutter 42b, the projection control circuit 41 can also project the light field projection light L1 corresponding to the area of the selected or set light field onto the subject P by switching the opening and closing states of the respective shutters 42b.

[0057] In addition, on the subject P, in addition to the light field projection light L1, an irradiation field projection light L2 indicating the irradiation area of the X-ray on the subject P is also projected. The irradiation field projection light L2 is generated by an irradiation field lamp 50 housed in the X-ray irradiation housing 100. By irradiating the subject P with visible light generated by the irradiation field lamp 50 through the semi-reflection mirror 51 and the opening of the X-ray diaphragm device 103, the irradiation field projection light L2 corresponding to the irradiation area of the X-ray is projected onto the subject P. In addition, the irradiation field lamp 50 and the semi-reflection mirror 51 constitute an irradiation field projection unit.

[0058] Figure 2Examples (a) and (b) illustrate a situation where the subject P stands upright with the front of the chest in contact with the X-ray detection panel 31, and X-rays are irradiated from the back side of the subject P. In this positioning of the subject P, since the X-ray detection panel 31 is hidden behind the subject P, even if a lighting field is displayed on the surface of the X-ray detection panel 31, users such as the radiographer cannot directly visually confirm it. In contrast, in the X-ray diagnostic apparatus 1 of the embodiment, on the subject P, the irradiation field projection light L2 and the lighting field projection light L1 are projected overlappingly. As a result, even in the X-ray diagnostic apparatus 1 where the position and number of the lighting fields can be adjusted, a user observing the subject P from the X-ray irradiation apparatus 10 side can grasp the positional relationship between the currently selected or set lighting field and the irradiation field in an easily visually confirmable manner.

[0059] As a method of projecting onto the subject P in a distinguishable manner for easy visual confirmation of the positional relationship between the lighting field and the irradiation field, for example, changing the color of the light, changing the intensity of the light, highlighting the outer frame of one region or highlighting the outer frames of both regions in different ways, or a combination thereof, etc. can be cited in the irradiation field projection light L2 and the lighting field projection light L1.

[0060] Figure 3 (a) is an explanatory diagram showing an example when the lighting field projection device 40 is provided outside the X-ray irradiation housing 100. Figure 3 (b) is an explanatory diagram showing an example when the lighting field projection device 40 is provided inside the X-ray irradiation housing 100.

[0061] The projection control circuit 41 switches the lighting states of the respective laser light sources 42 to project the lighting field projection light L1 corresponding to the area of the selected or set lighting field onto the subject P (refer to Figure 3 (a) and (b)).

[0062] A shutter 42b may also be provided on the housing 42a of each laser light source 42. In this case, the projection control circuit 41 can switch the opening and closing states of the respective shutters 42b so that the lighting field projection light L1 corresponding to the area of the selected or set lighting field is projected onto the subject P, and information indicating the areas of other lighting fields is not projected onto the subject.

[0063] In addition, as Figure 3As shown in (b), when the laser light source 42 is disposed inside the X-ray irradiation housing 100, the laser light emitted from the laser light source 42 may be the same as the visible light generated by the irradiation field lamp 50, and is irradiated onto the subject P through the opening of the semi-transparent mirror 51 and the X-ray diaphragm device 103. In this case, the projection control circuit 41 may also switch the lighting states of the respective laser light sources 42 or switch the opening and closing states of the respective shutters 42b so that the lighting field projection light L1 corresponding to the area of the selected or set lighting field is projected onto the subject P.

[0064] In addition, the number of laser light sources 42 may be set to the same number as the number of lighting fields that can be selected or set (for example, 6×6, etc.), or a larger number (for example, 9×9, etc.) may be set. When the number of laser light sources 42 is set to be larger than the number of lighting fields that can be selected or set, for example, the correspondence between each lighting field and each laser light source 42 may be preset. At this time, one laser light source 42 may correspond to one lighting field, or one or more laser light sources 42 may correspond to one lighting field.

[0065] In addition, the projection control circuit 41 may also adjust the incident angle of the lighting field projection light L1 incident on the subject P by adjusting the angle of the laser light source 42. For example, when the distance between the X-ray irradiation housing 100 and the X-ray detection panel 31 is changed, the position of the laser light of the laser light source 42 incident obliquely on the subject P will shift according to the changed distance. The projection control circuit 41 may adjust the incident angle of the lighting field projection light L1 incident on the subject P by adjusting the angle of the laser light source 42 in order to correct this shift.

[0066] Figure 4 is a flowchart showing an example of the processing flow or operation flow of the X-ray diagnostic apparatus 1 according to the first embodiment. In addition, Figure 5 is a diagram showing the operation concept of the X-ray diagnostic apparatus 1 according to the first embodiment.

[0067] First, in step ST100, the user sets a shooting protocol via the user interface 62, such as a shooting protocol indicating a shooting target part such as a pure chest shot and a shooting purpose.

[0068] In step ST101, the lighting field is set to a preset initial state. For example, as Figure 5 shown in (a), as the initial state, all the lighting fields of three rows and three columns set on the X-ray detection panel 31 are selected.

[0069] Next, in step ST102, the subject is positioned, and in step ST103, the apparatus is positioned. For example, the X-ray tube 101 is disposed on the back side of the subject P.

[0070] Then, in step ST104, the irradiation field lamp 50 is turned on. In response thereto, the irradiation field projection light L2 is projected onto the subject P.

[0071] In the next step ST105, the light collection field projection is turned on. Specifically, the laser light source 42 for the light collection field is turned on, and the light collection field projection light L1 is projected onto the subject P. The light collection field projection light L1 projected at this stage corresponds to the initial state of the light collection field as shown in Figure 5 (a) of.

[0072] Next, in step ST106, the light collection field is adjusted so that the light collection field coincides with the region of interest of the subject. For example, the user observes the light collection field projection light L1 projected onto the subject P and the region of interest of the subject P, and at the same time releases a part of the light collection field set to the initial state via the user interface 62 to make it non - selected or re - select the non - selected light collection field to adjust the light collection field.

[0073] Figure 5 (b) of is a diagram illustrating the adjusted light collection field. For example, in each light collection field in the initial state, a light collection field that does not overlap with the subject is determined to be unsuitable for AEC, and the selection of such a light collection field is released and adjusted to be non - selected.

[0074] Figure 6 is a flowchart showing an example of the processing flow or operation flow of the X - ray diagnostic apparatus 1 representing a modified example of the first embodiment. In addition, Figure 7 is a diagram showing the operation concept of the X - ray diagnostic apparatus 1 representing a modified example of the first embodiment.

[0075] For Figure 6 the same processing as in the first embodiment ( Figure 4 the flowchart) is labeled with the same reference numerals, and the description is omitted to avoid repetition. The flowcharts of the following embodiments are the same.

[0076] The difference between the processing of the modified example of the first embodiment ( Figure 6 ) and the processing of the first embodiment ( Figure 4 ) is that, instead of manually adjusting the light collection field in step ST106 of Figure 4 , in step ST200 of Figure 6 , the apparatus automatically selects the light collection field.

[0077] Specifically, in step ST200, based on at least one of the imaging protocol input via the user interface 62, the imaging part of the subject, and the region of interest of the subject, the light collection field selection setting function F02 of the processing circuit 61 automatically selects one or more light collection fields. Figure 7 (a) of shows the light collection field in the initial state,Figure 7 Fig. (b) shows each light collection field after selection (i.e., adjusted) by the light collection field selection setting function F02.

[0078] In a modification of the first embodiment, the operation burden of manually selecting a light collection field or manually setting it to non-selection is reduced.

[0079] Figure 8 Fig. (a) is a block diagram showing a structural example of the X-ray diagnostic apparatus 1 according to the second embodiment. Figure 8 Fig. (b) is a diagram schematically showing the positional relationship between the light collection field projection light L1 and the irradiation field projection light L2 when observing the subject P from the X-ray tube 101.

[0080] The difference between the second embodiment and the first embodiment is that, as Figure 8 shown in Fig. (a), the X-ray diagnostic apparatus 1 according to the second embodiment includes a visible light camera 80.

[0081] The visible light camera 80 captures a plurality of light collection field projection lights L1 projected onto the subject P and a gesture of the user designating at least one of the plurality of light collection field projection lights L1. Here, the user's gesture is at least one of the position and movement of the user's arm, hand, fingers, or at least one of the position and movement of a support member held by the user. In Figure 8 Figs. (a) and (b), the user's gesture is indicated by the mark H of "hand".

[0082] Figure 9 Fig. is a flowchart showing an example of the processing flow or operation flow of the X-ray diagnostic apparatus 1 according to the second embodiment. Figure 10 Fig. is a diagram showing the operation concept of the X-ray diagnostic apparatus 1 according to the second embodiment.

[0083] The processing of the second embodiment ( Figure 9 ) and the processing of the first embodiment ( Figure 4 ) are different in that, instead of Figure 4 manually adjusting the light collection field in step ST106, in Figure 9 the flowchart of Fig., the processing of step ST300 and step ST301 is performed.

[0084] In Figure 9 step ST300, the visible light camera 80 captures a gesture of the user designating any one of the light collection field projection lights L1 and sends the captured image to the processing circuit 61.

[0085] In step ST301, the lighting field selection setting function F02 of the processing circuit 61 determines at least one lighting field projection light L1 indicated by the gesture based on the user gesture in the captured image of the visible light camera. Further, the lighting field selection setting function F02 adjusts the lighting field by canceling the selection of the lighting field corresponding to the determined at least one lighting field projection light L1 to make it unselected, or reselecting the unselected lighting field corresponding to the indicated position.

[0086] In addition, in synchronization with the adjustment of the lighting field by the lighting field selection setting function F02, the number and position of the lighting field projection lights L1 projected onto the subject P also change.

[0087] According to the X-ray diagnostic apparatus 1 of the second embodiment, manual operation via the user interface 62 is not required, and the lighting field can be adjusted while gazing at the subject P.

[0088] Figure 11 (a) is a block diagram showing a structural example of the X-ray diagnostic apparatus 1 of the third embodiment. Figure 11 (b) is a diagram schematically showing the positional relationship between the lighting field projection light L1 and the irradiation field projection light L2 when observing the subject P from the X-ray tube 101 in the third embodiment.

[0089] In the third embodiment and the first embodiment, the structures shown in the respective block diagrams are the same, but the method of arranging the lighting fields in the X-ray detection panel 31 and the method of setting the lighting fields of the lighting field selection setting function F02 of the processing circuit 61 are different between the third embodiment and the first embodiment.

[0090] In the first embodiment (the same applies to the second embodiment), in the X-ray detection panel 31, as an initial state, a plurality of lighting fields having a prescribed number, prescribed positions, and prescribed shapes are set. For the plurality of lighting fields in this initial state, one or more lighting fields are made unselected or the unselected lighting fields are reselected, thereby adjusting the lighting field.

[0091] In contrast, in the third embodiment (the same applies to the fourth and fifth embodiments described below), it is configured such that lighting fields having a desired number, desired positions, and desired prescribed shapes can be set in the X-ray detection panel 31, and a detailed and highly flexible lighting field adjustment can be performed.

[0092] In Figure 11 (a) and Figure 11 (b), after assuming the lung field as the region of interest of the subject P, lighting fields corresponding to the shape of the lung field are set. Moreover, in Figure 11 (a) and Figure 11In (b) thereof, an example is shown in which the illumination field projection light L1 corresponding to the shape of the lung field is projected onto the subject P using the laser light source 42.

[0093] Figure 12 FIG. is a flowchart showing an example of the processing flow or operation flow of the X-ray diagnostic apparatus 1 according to the third embodiment. Figure 13 FIG. is a diagram showing the operation concept of the X-ray diagnostic apparatus 1 according to the third embodiment.

[0094] In step ST400, an X-ray image is acquired as an image for positioning the illumination field. The X-ray image can be acquired, for example, as an arbitrary frame image (static image) of an X-ray fluoroscopic image with a small dose. As Figure 13 illustrated in (a) of FIG., the acquired X-ray image is displayed on, for example, the display 63, the touch panel of the user interface 62, etc.

[0095] In step ST401, for the region of interest of the X-ray image, the user manually sets the region of the illumination field. For example, as Figure 13 illustrated in (b) of FIG., the touch panel of the user interface 62 is caused to display the X-ray image, and for the region of interest of the X-ray image, that is, the lung field, for example, the periphery of the lung field is depicted using an indicating unit such as a stylus or a finger, and the region of the illumination field is manually set. The information of the manually set region is taken in by the illumination field selection setting function F02 of the processing circuit 61, and the illumination field selection setting function F02 designates the position and shape of the illumination field based on the taken-in region information.

[0096] In step ST402, the illumination field selection setting function F02 sets the thus designated illumination field on the X-ray detection panel 31. At the same time, the illumination field selection setting function F02 sets information related to the designated illumination field in the projection control circuit 41 of the illumination field projection device 40.

[0097] In step ST105, based on the information related to the set illumination field, the illumination field projection is turned on, and as Figure 13 shown in (c) of FIG., the illumination field projection light L1 is projected onto the subject P.

[0098] Figure 14 FIG. is a flowchart showing an example of the processing flow or operation flow of the X-ray diagnostic apparatus 1 according to the fourth embodiment. Figure 15 FIG. is a diagram showing the operation concept of the X-ray diagnostic apparatus 1 according to the fourth embodiment.

[0099] In Figure 14 step ST500, which is the same as step ST400 of the third embodiment, as Figure 15 shown in (a) of FIG., an X-ray image is acquired as an image for positioning the illumination field.

[0100] In the third embodiment, for the region of interest in the X-ray image, the user manually designates the illumination field ( Figure 12 step ST402). In contrast, in the fourth embodiment, as shown in step ST501, the illumination field selection setting function F02 detects the region of interest of the subject P based on the X-ray image, and based on the detected region of interest, the illumination field selection setting function F02 automatically sets one or more illumination fields (refer to Figure 15 (b)).

[0101] For example, the illumination field selection setting function F02 performs a known segmentation process on the X-ray image based on the information of the imaging object included in the imaging protocol input in step ST100 (for example, the information that the imaging object is the lung field), and detects the region of interest of the subject P. Then, based on the detected region of interest, the region corresponding to the region of interest (for example, a region substantially the same as the region of interest) is set as the illumination field.

[0102] Alternatively, the illumination field selection setting function F02 can also automatically set one or more illumination fields by inputting the X-ray image obtained in step ST500 into a pre-generated machine learning model. For example, the pre-generated machine learning model is a model that outputs information on one or more illumination fields when an X-ray image is input.

[0103] In step ST502, similar to the third embodiment, the illumination field selection setting function F02 sets the illumination field thus set on the X-ray detection panel 31, and sets information related to the set illumination field in the projection control circuit 41 of the illumination field projection device 40.

[0104] In step ST105, based on the information related to the set illumination field, the illumination field projection is turned on, and as shown in Figure 15 (c), the illumination field projection light L1 is projected onto the subject P.

[0105] In addition to being able to set a detailed and highly flexible illumination field in the same way as the third embodiment, the X-ray diagnostic apparatus 1 of the fourth embodiment does not require the operation burden of designating the region of the illumination field.

[0106] Figure 16 (a) is a block diagram showing a structural example of the X-ray diagnostic apparatus 1 of the fifth embodiment, Figure 16 (b) is a diagram schematically showing the positional relationship between the illumination field projection light L1 and the irradiation field projection light L2 when observing the subject P from the X-ray tube 101 in the fifth embodiment.

[0107] The X-ray diagnostic apparatus 1 according to the fifth embodiment is different from the third and fourth embodiments in that it has a visible light camera 80 for photographing a subject P.

[0108] Further, in the fourth embodiment, the lighting field selection setting function F02 detects a region of interest of the subject based on the X-ray image obtained by photographing the subject, and sets the lighting field based on the detected region of interest. In contrast, in the fifth embodiment, the region of interest of the subject is detected based on the visible light image of the subject P photographed by the visible light camera 80, and the lighting field is set based on the detected region of interest.

[0109] Figure 17 FIG. is a flowchart showing an example of the processing flow or operation flow of the X-ray diagnostic apparatus 1 according to the fifth embodiment. Figure 18 FIG. is a diagram showing the operation concept of the X-ray diagnostic apparatus 1 according to the fifth embodiment.

[0110] In Figure 17 step ST600, as shown in Figure 18 (a) of FIG., the visible light camera 80 is used to acquire a visible light image.

[0111] In the next step ST601, the lighting field selection setting function F02 automatically sets one or more lighting fields based on the acquired visible light image. For example, the lighting field selection setting function F02 automatically sets one or more lighting fields by inputting the acquired visible light image into a pre-generated machine learning model (see Figure 18 (b) of FIG.).

[0112] Then, in step ST602, similar to the third and fourth embodiments, the lighting field selection setting function F02 sets the lighting field thus set on the X-ray detection panel 31, and sets information related to the set lighting field in the projection control circuit 41 of the lighting field projection device 40.

[0113] In step ST105, based on the information related to the set lighting field, the lighting field projection is turned on, and as shown in Figure 18 (c) of FIG., the lighting field projection light L1 is projected onto the subject P.

[0114] The X-ray diagnostic apparatus 1 according to the fifth embodiment is provided with the visible light camera 80 in addition to the fourth embodiment, but uses the visible light image photographed by the visible light camera 80 instead of the X-ray image as the image for automatically setting the lighting field, so that the radiation to the subject P can be reduced.

[0115] In addition, the light field selection setting function, the light field projection device, and the user interface in each embodiment are examples of the selection setting unit, the light field projection unit, and the input unit described in the claims, respectively.

[0116] According to at least one of the embodiments described above, it is possible to visually confirm the light field for AEC in the X-ray diagnostic apparatus by a simple structure and easily for the user.

[0117] Some embodiments of the present invention have been described, but 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 ways, and various omissions, substitutions, and changes can be made without departing from the gist of the invention. These embodiments and their modifications are included in the scope and gist of the invention, and are also included in the invention described in the claims and its equivalents.

[0118] Regarding the above embodiments, the following remarks are disclosed as an aspect and optional features of the invention.

[0119] (Remark 1)

[0120] An X-ray diagnostic apparatus includes:

[0121] An X-ray tube;

[0122] An X-ray detection panel that detects X-rays irradiated from the X-ray tube and transmitted through a subject;

[0123] A selection setting unit that selects one or more light fields for AEC (Automatic Exposure Control) from a plurality of light fields provided in the X-ray detection panel or sets one or more light fields for the AEC in the X-ray detection panel; and

[0124] A light field projection unit that projects the area of the selected or set one or more light fields onto the subject in a visually confirmable manner using visible light.

[0125] (Remark 2)

[0126] According to the X-ray diagnostic apparatus described in Remark 1,

[0127] the X-ray diagnostic apparatus further includes an input unit for inputting a shooting protocol, a shooting part of the subject, and an interested area of the subject,

[0128] and the selection setting unit selects the one or more light fields from the plurality of pre-set light fields based on at least one of the input shooting protocol, the shooting part, and the interested area.

[0129] (Note 3)

[0130] The X-ray diagnostic apparatus according to Note 1 or Note 2, wherein

[0131] the selection setting unit selects the one or more light collection fields from the plurality of pre-set light collection fields based on a user's designation.

[0132] (Note 4)

[0133] The X-ray diagnostic apparatus according to any one of Notes 1 to 3, wherein

[0134] the X-ray diagnostic apparatus further includes a visible light camera that captures a plurality of projection images respectively corresponding to the plurality of light collection fields projected onto the subject and a gesture of the user designating at least one of the plurality of projection images.

[0135] the selection setting unit determines the at least one projection image based on the gesture of the user in the captured image of the visible light camera, and

[0136] cancels the selection of the light collection field corresponding to the determined at least one projection image to make the light collection field non-selected, or re-selects the non-selected light collection field.

[0137] (Note 5)

[0138] The X-ray diagnostic apparatus according to Note 4, wherein

[0139] the gesture of the user is at least one of the position and movement of the user's arm, hand, finger, or a support member held by the user.

[0140] (Note 6)

[0141] The X-ray diagnostic apparatus according to any one of Notes 1 to 5, wherein

[0142] the X-ray diagnostic apparatus further includes an irradiation field projection unit that projects the area of the irradiation field of the X-ray on the subject onto the subject.

[0143] the light collection field projection unit projects the area of the one or more light collection fields in a manner overlapping with the area of the irradiation field and projects the area of the one or more light collection fields onto the subject in a manner distinguishable from the area of the irradiation field.

[0144] (Note 7)

[0145] The X-ray diagnostic apparatus according to any one of Notes 1 to 6, further including:

[0146] An X-ray diaphragm that defines the irradiation range of the irradiation field of the X-ray; and

[0147] An X-ray irradiation housing that houses at least the X-ray tube and the X-ray diaphragm,

[0148] The light source of the light collection field projection unit, that is, the light source for projecting the area of the light collection field, is provided adjacent to the X-ray irradiation housing.

[0149] (Note 8)

[0150] The X-ray diagnostic apparatus according to any one of Notes 1 to 7, further comprising:

[0151] A display that displays an X-ray image obtained by photographing the subject using the X-ray irradiated from the X-ray tube; and

[0152] A user interface that designates the area of one or more light collection fields for an area of interest of the X-ray image displayed on the display,

[0153] The selection setting unit sets one or more light collection fields for the AEC based on the area of one or more light collection fields designated through the user interface.

[0154] (Note 9)

[0155] The X-ray diagnostic apparatus according to any one of Notes 1 to 8, wherein

[0156] The selection setting unit detects an area of interest of the subject based on an X-ray image obtained by photographing the subject using the X-ray irradiated from the X-ray tube, and sets one or more light collection fields for the AEC based on the detected area of interest.

[0157] (Note 10)

[0158] The X-ray diagnostic apparatus according to any one of Notes 1 to 9, wherein

[0159] The X-ray diagnostic apparatus further comprises an input unit for inputting a shooting protocol,

[0160] The selection setting unit detects an area of interest of the subject through a segmentation process based on information of the subject included in the input shooting protocol.

[0161] (Note 11)

[0162] The X-ray diagnostic apparatus according to any one of Notes 1 to 10, wherein

[0163] The selection setting unit sets one or more light-receiving fields for the AEC by inputting an X-ray image obtained by photographing a subject using X-rays irradiated from the X-ray tube into a pre-generated machine learning model.

[0164] (Note 12)

[0165] According to the X-ray diagnostic apparatus according to any one of Notes 1 to 11, wherein

[0166] The X-ray diagnostic apparatus further includes a visible light camera that photographs the subject.

[0167] The selection setting unit sets one or more light-receiving fields for the AEC by inputting a visible light image of the subject photographed by the visible light camera into a pre-generated machine learning model.

[0168] (Note 13)

[0169] A control method for an X-ray diagnostic apparatus, the control method for the X-ray diagnostic apparatus being a control method for an X-ray diagnostic apparatus including at least an X-ray tube and an X-ray detection panel that detects X-rays irradiated from the X-ray tube and transmitted through a subject, wherein

[0170] Select one or more light-receiving fields for AEC (Automatic Exposure Control) from a plurality of light-receiving fields provided in the X-ray detection panel, or set one or more light-receiving fields for the AEC in the X-ray detection panel.

[0171] Project the area of the selected or set one or more light-receiving fields onto the subject using visible light in a visually confirmable manner.

Claims

1. An X-ray diagnostic device, characterized in that: have: X-ray tube; An X-ray detection panel that detects X-rays irradiated from the X-ray tube and transmitted through the subject; A selection and setting unit, which selects one or more lighting fields from a plurality of lighting fields for AEC (automatic exposure control) provided in the X-ray detection panel, or sets one or more lighting fields for the AEC in the X-ray detection panel; as well as A lighting field projection unit projects information indicating the selected or set area of ​​the one or more lighting fields onto the subject using visible light in a manner that allows visual confirmation.

2. The X-ray diagnostic apparatus according to claim 1, characterized in that: The X-ray diagnostic apparatus further includes an input unit for inputting an imaging protocol, an imaging part of the subject, and a region of interest of the subject. The selection and setting unit selects the one or more lighting fields from the plurality of lighting fields that are preset based on at least one of the inputted imaging protocol, the imaging part, and the region of interest.

3. The X-ray diagnostic apparatus according to claim 1, characterized in that: The selection setting unit selects the one or more lighting fields from among the plurality of lighting fields set in advance based on a designation by a user.

4. The X-ray diagnostic apparatus according to claim 3, characterized in that: The X-ray diagnostic apparatus further includes a visible light camera, which captures a plurality of projection images corresponding to the plurality of light fields projected onto the subject and a gesture of the user designating at least one of the plurality of projection images. The selection setting unit determines the at least one projection image based on the gesture of the user in the image captured by the visible light camera, and The lighting field corresponding to the determined at least one projection image is deselected and the lighting field is set to be non-selected, or a non-selected lighting field is reselected.

5. The X-ray diagnostic apparatus according to claim 4, characterized in that: The gesture of the user is at least one of a position and a movement of an arm, a hand, a finger of the user, or a supporting member held by the user.

6. The X-ray diagnostic apparatus according to claim 1, characterized in that: The X-ray diagnostic apparatus further includes an irradiation field projection unit that projects an area of ​​an irradiation field of the X-ray to the subject onto the subject. The lighting field projection unit projects information representing the area of ​​the one or more lighting fields in a manner overlapping with the area of ​​the irradiation field, and projects the information representing the area of ​​the one or more lighting fields onto the subject in a manner distinguishable from the area of ​​the irradiation field.

7. The X-ray diagnostic apparatus according to claim 1, characterized in that: Also available: An X-ray aperture that defines an irradiation range of an irradiation field of the X-ray; and an X-ray irradiation housing which accommodates at least the X-ray tube and the X-ray aperture, The daylighting field projection unit includes a plurality of light sources at least corresponding to the number of the daylighting fields for projecting information indicating the area of ​​the daylighting field, and is disposed inside the X-ray irradiation housing or adjacent to the outside of the X-ray irradiation housing.

8. The X-ray diagnostic apparatus according to claim 7, characterized in that: The lighting field projection unit includes a projection control circuit that switches lighting states of the plurality of light sources so that information indicating the area of ​​one or more lighting fields selected or set by the selection and setting unit is projected onto the subject.

9. The X-ray diagnostic apparatus according to claim 8, characterized in that: The lighting field projection unit includes the plurality of light sources, the number of which is greater than the number of the lighting fields.

10. The X-ray diagnostic apparatus according to claim 8, characterized in that: The lighting field projection unit further includes a light shielding device for cutting off the light paths of the plurality of light sources. The projection control circuit of the lighting field projection unit switches the opening and closing states of the shutters of the multiple light sources so that information representing the areas of one or more lighting fields selected or set by the selection and setting unit is projected onto the subject, and information representing the areas of other lighting fields is not projected onto the subject.

11. The X-ray diagnostic apparatus according to claim 1, characterized in that: Also available: a display that displays an X-ray image obtained by imaging the subject using the X-rays irradiated from the X-ray tube; and a user interface for specifying a region of the one or more light collecting fields for a region of interest of the X-ray image displayed on the display, The selection setting unit sets one or more lighting fields for the AEC based on the areas of the one or more lighting fields designated through the user interface.

12. The X-ray diagnostic apparatus according to claim 1, characterized in that: The selection and setting unit detects a region of interest of the subject based on an X-ray image obtained by imaging the subject using X-rays emitted from the X-ray tube, and sets one or more lighting fields for the AEC based on the detected region of interest.

13. The X-ray diagnostic apparatus according to claim 12, characterized in that: The X-ray diagnostic apparatus further includes an input unit for inputting an imaging protocol. The selection setting unit detects a region of interest of the subject by segmentation processing based on information of an imaging target included in the input imaging protocol.

14. The X-ray diagnostic apparatus according to claim 1, characterized in that: The selection and setting unit sets one or more lighting fields for the AEC by inputting an X-ray image obtained by imaging the subject using X-rays irradiated from the X-ray tube into a pre-generated machine learning model.

15. The X-ray diagnostic apparatus according to claim 1, characterized in that: The X-ray diagnostic apparatus further comprises a visible light camera for photographing the subject. The selection and setting unit sets one or more lighting fields for the AEC by inputting the visible light image of the subject captured by the visible light camera into a pre-generated machine learning model.

16. A method for controlling an X-ray diagnostic apparatus, the method for controlling an X-ray diagnostic apparatus comprising at least an X-ray tube and an X-ray detection panel for detecting X-rays emitted from the X-ray tube and transmitted through a subject, wherein: One or more lighting fields are selected from a plurality of lighting fields for AEC (automatic exposure control) provided in the X-ray detection panel, or one or more lighting fields for AEC are set in the X-ray detection panel, Information indicating the selected or set area of ​​the one or more lighting fields is projected onto the subject in a visually recognizable manner using visible light.

17. The control method of the X-ray diagnostic apparatus according to claim 16, characterized in that: The X-ray diagnostic apparatus further includes an input unit for inputting an imaging protocol, an imaging part of the subject, and a region of interest of the subject. The step of selecting one or more lighting fields from the plurality of lighting fields comprises the following steps: based on the input shooting protocol, the shooting location and at least one of the regions of interest, selecting the one or more lighting fields from the plurality of pre-set lighting fields.

18. The control method of the X-ray diagnostic apparatus according to claim 16, characterized in that: The step of selecting one or more daylighting fields from the plurality of daylighting fields comprises the following steps: based on a user's designation, selecting the one or more daylighting fields from the plurality of daylighting fields that are preset.

19. The control method of an X-ray diagnostic apparatus according to claim 16, characterized in that: The control method of the X-ray diagnostic apparatus further comprises the step of projecting the area of ​​the irradiation field of the X-ray to the subject onto the subject, The step of projecting information representing the area of ​​the lighting field onto the subject in a manner that can be visually confirmed using visible light includes the following steps: projecting information representing the area of ​​the one or more lighting fields onto the subject in a manner that overlaps with the area of ​​the irradiation field, and projecting information representing the area of ​​the one or more lighting fields onto the subject in a manner that can be distinguished from the area of ​​the irradiation field.

20. The control method of an X-ray diagnostic apparatus according to claim 16, characterized in that: The X-ray diagnostic device further comprises: a display that displays an X-ray image obtained by imaging the subject using the X-rays irradiated from the X-ray tube; and a user interface for specifying a region of the one or more light collecting fields for a region of interest of the X-ray image displayed on the display, The step of setting one or more light fields for the AEC within the X-ray detection panel includes the step of setting one or more light fields for the AEC based on areas of the one or more light fields specified through the user interface.

Images