Dynamic image photographing system, dynamic image photographing method, and program

Abstract

To provide a dynamic image photographing system or the like capable of managing a total exposure dose in an intermittent photographing mode including still image photographing and dynamic image photographing.SOLUTION: A radiographic system including a radiation source and a radiation detector is a dynamic image capturing system for capturing a still image constituted of a single frame and a dynamic image constituted of a plurality of frames by irradiating a subject with a radioactive ray by the radiation source and detecting the radioactive ray transmitted through the subject by the radiation detector, and includes a control unit to control the radiation source and the radiation detector so as to operate in an intermittent imaging mode in which imaging of the still image and the dynamic image is performed a plurality of times based on a designated imaging period and an imaging interruption period from the start of one imaging to the end of the imaging. The control unit controls termination of imaging in accordance with a total number of frames of the still image and the dynamic image.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a dynamic image capturing system, a dynamic image capturing method, and a program. [Background technology]

[0002] A radiographic imaging system is known that aims to perform dynamic imaging of a subject outside of an imaging room in a hospital (see Patent Document 1). This radiographic imaging system makes it possible to perform dynamic imaging of patients who have difficulty moving to an imaging room, such as seriously injured patients, thereby improving convenience.

[0003] In recent years, there has been a need for continuous, long-term video imaging in fluoroscopy, swallowing contrast examinations, and other procedures using dynamic imaging systems. However, in dynamic imaging, the total dose per imaging session is limited from the perspective of risk management. This poses a problem in that X-rays cannot be irradiated continuously for long periods of time. Therefore, a technology has been proposed that performs multiple dynamic imaging sessions based on specified imaging periods and imaging interruption periods from the start to the end of a single imaging session. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 2019-5073 Summary of the Invention [Problem to be solved by the invention]

[0005] When performing dynamic radiography, it is desirable to confirm the patient's positioning before the dynamic radiography. This is to avoid re-imaging and reduce radiation exposure. However, conventional techniques do not take into consideration capturing still images for positioning confirmation before dynamic radiography. This poses a problem in that it is not possible to manage the total radiation exposure dose, which is the sum of the radiation exposure dose during dynamic radiography and the radiation exposure dose during still image capture.

[0006] Therefore, in order to solve the above problem, the present invention aims to provide a dynamic image capturing system, a dynamic image capturing method, and a program that can manage the total radiation exposure dose in an intermittent imaging mode that includes still image capturing and dynamic image capturing. [Means for solving the problem]

[0007] The dynamic image capturing system according to the present invention comprises: a radiation source and a radiation detector, a dynamic image capturing system that captures a still image consisting of a single frame and a dynamic image consisting of a plurality of frames by irradiating a subject with radiation from the radiation source and detecting the radiation that has passed through the subject with the radiation detector, a control unit that controls the radiation source and the radiation detector so as to operate in an intermittent imaging mode in which the still images and dynamic images are captured multiple times based on a designated imaging period and imaging interruption period from the start to the end of one imaging session, The control unit controls the end of image capture depending on the total number of frames of still images and dynamic images.

[0008] The dynamic image capturing method according to the present invention comprises: a radiation source and a radiation detector, a dynamic image capturing method for a dynamic image capturing system that captures a still image consisting of a single frame and a dynamic image consisting of a plurality of frames by irradiating a subject with radiation from the radiation source and detecting the radiation that has passed through the subject with the radiation detector, the method comprising: controlling the radiation source and the radiation detector to operate in an intermittent imaging mode in which the still images and dynamic images are captured multiple times based on a designated imaging period and imaging interruption period from the start to the end of one imaging session; In the step, the end of the photographing is controlled according to the total number of frames of the still images and the dynamic images.

[0009] The program according to the present invention comprises: a radiation source and a radiation detector, a computer included in a dynamic image capturing system that captures a still image consisting of a single frame and a dynamic image consisting of a plurality of frames by irradiating a subject with radiation from the radiation source and detecting the radiation that has passed through the subject with the radiation detector, a control unit that controls the radiation source and the radiation detector to operate in an intermittent imaging mode in which the still images and dynamic images are captured multiple times based on a designated imaging period and imaging interruption period from the start to the end of one imaging session, and controls the end of imaging in accordance with the total number of frames of the still images and dynamic images; Function as. [Effects of the Invention]

[0010] According to the present invention, the end of imaging is controlled according to the total number of frames of still images and dynamic images, so that the patient's radiation dose can be accurately managed even when performing an intermittent imaging mode that includes still image imaging and dynamic imaging. [Brief explanation of the drawings]

[0011] [Figure 1] 1 is a diagram illustrating an example of a schematic configuration of a radiation imaging system according to a first embodiment. [Figure 2] 4 is a diagram showing a first irradiation pattern of X-rays irradiated from a radiation source in an intermittent imaging mode according to the first embodiment. FIG. [Figure 3] 10 is a diagram showing a second irradiation pattern of X-rays irradiated from the radiation source in the intermittent imaging mode according to the first embodiment. FIG. [Figure 4] FIG. 10 is a diagram showing a third irradiation pattern of X-rays irradiated from the radiation source in the intermittent imaging mode according to the first embodiment. [Figure 5] FIG. 10 is a diagram showing a fourth irradiation pattern of X-rays irradiated from the radiation source in the intermittent imaging mode according to the first embodiment. [Figure 6] 6 is a flowchart showing an example of the operation of the radiation imaging system in an intermittent imaging mode according to the first embodiment. [Figure 7] FIG. 4 is a diagram showing an example of an examination screen displayed on a display unit according to the first embodiment. [Figure 8] FIG. 4 is a diagram showing an example of a warm-up operation of the imaging device and the radiation source when an intermittent imaging order is placed according to the first embodiment. [Figure 9] 10A and 10B are diagrams illustrating an example of the operation of the radiation source and the imaging device when a still image switch is pressed in an intermittent imaging mode according to the first embodiment. [Figure 10] 10 is a diagram showing an example of the operation of the radiation source and the imaging device when the dynamic switch 24 is pressed in the intermittent imaging mode according to the first embodiment. FIG. [Figure 11] FIG. 10 is a diagram showing an example of an examination screen on which notification information and the like according to the first embodiment are displayed. [Figure 12] 10A and 10B are diagrams illustrating an example of a first stopping operation of the radiation source and the imaging device at the end of the intermittent imaging mode according to the first embodiment. [Figure 13] 10A and 10B are diagrams illustrating an example of a second stopping operation of the radiation source and the imaging device at the end of the intermittent imaging mode according to the first embodiment. [Figure 14] FIG. 10 is a diagram illustrating an example of a third stop operation of the radiation source and the imaging device at the end of the intermittent imaging mode according to the first embodiment. [Figure 15] 10 is a flowchart showing an example of the operation of the radiation imaging system in an intermittent imaging mode according to the second embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0012] A radiation imaging system, a radiation imaging method, and a program according to preferred embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings.

[0013] First Embodiment [Example of schematic configuration of radiation imaging system 100] Fig. 1 is a diagram showing an example of the schematic configuration of a radiography system 100 according to the first embodiment. As shown in Fig. 1, the radiography system 100 includes a medical cart 1 and a radiography device 2 (hereinafter referred to as the radiography device). The medical cart 1 includes a console 10, a radiation irradiation device 20 (hereinafter referred to as the irradiation device), a display unit 30, an operation unit 32, a charging unit 40, a hub 50, an access point 60, and a storage unit 70.

[0014] The console 10 automatically sets imaging conditions based on imaging order information transmitted from a RIS or the like. RIS is an abbreviation for Radiology Information System. A user such as a doctor or radiologist may manually set imaging conditions by operating the operation unit. Examples of imaging conditions include patient conditions related to the subject, irradiation conditions related to the irradiation of radiation, and image reading conditions related to the reading of images from the imaging device. Examples of patient conditions include the imaging region, imaging direction, and physique. Examples of irradiation conditions include tube voltage (kV), tube current (mA), irradiation time (ms), current-time product (mAs value), irradiation field size (vertical and horizontal aperture sizes of the collimator), and pulse frame rate. Examples of image reading conditions include pixel size, image size, and frame rate. The console 10 also acquires image data of the radiation image generated by the imaging device 2 and outputs the acquired image data to an external device such as a PACS via a network. PACS is an abbreviation for Picture Archiving and Communication System.

[0015] The irradiation device 20 includes a radiation control device 21 and a radiation source 22. The radiation control device 21 acquires imaging conditions set by the console 10 or the like, and transmits the acquired imaging conditions to the irradiation device 20 and the imaging device 2. The imaging conditions include, for example, the above-mentioned irradiation conditions and image reading conditions. The radiation control device 21 generates a timing pulse signal that serves as a reference when the radiation source 22 irradiates radiation, based on the time within the device, and transmits the generated timing pulse signal to the radiation source 22. The radiation control device 21 performs time synchronization to match the time with the imaging device 2.

[0016] A still image switch 23 and a dynamic switch 24 are connected to the radiation control device 21. The still image switch 23 is, for example, a hand switch, and is pressed by the user to start still image capture. The still image switch 23 generates an operation signal in response to the user's pressing operation and outputs the generated operation signal to the radiation control device 21. The dynamic switch 24 is, for example, a foot switch, and is pressed by the user to start dynamic image capture. The dynamic switch 24 generates an operation signal in response to the user's pressing operation and outputs the generated operation signal to the radiation control device 21. Note that the configurations of the still image switch 23 and the dynamic switch 24 are not limited to those of this example as long as they can distinguish between the two systems of still image capture and dynamic image capture. Whether the still image switch 23 and the dynamic switch 24 are pressed (ON) or pulled (OFF) may be determined by the radiation control device 21, or may be determined by the console 10 based on the operation signal supplied from the radiation control device 21. The still image switch 23 and the dynamic switch 24 may also be connected to the console 10.

[0017] The radiation source 22 irradiates the subject with radiation, such as X-rays, based on the irradiation conditions and timing pulse signals supplied by the radiation control device 21. The radiation source 22 generates radiation in a manner corresponding to the type of radiation image, such as a still image or a dynamic image. Specifically, in the case of a still image, the radiation source 22 irradiates radiation only once per pressing of the still image switch 23. In the case of a dynamic image, the radiation source 22 acquires a series of images of the subject by repeatedly irradiating the subject with pulsed radiation at predetermined intervals in response to a single pressing of the dynamic switch 24. Repeated irradiation of pulsed radiation at predetermined intervals is called pulse irradiation. Dynamic imaging also includes the case of acquiring a series of images of the subject by continuously irradiating the subject with a low dose rate in response to a single imaging operation. Continuous, uninterrupted irradiation of radiation is called continuous irradiation. A series of images obtained by dynamic imaging is called a dynamic image. Each of the images constituting a dynamic image is called a frame. Dynamic photography includes video recording, but does not include taking still images while displaying the video. Dynamic images include video, but do not include images obtained by taking still images while displaying the video.

[0018] The imaging device 2 detects radiation irradiated from the radiation source 22 of the irradiation device 20, thereby generating digital image data showing the imaging site of the subject. The imaging device 2 corresponds to an example of a radiation detector. For example, a portable FPD can be used as the imaging device 2. FPD is an abbreviation for Flat Panel Detector. The imaging device 2 has an oscillator, and performs time synchronization communication with the radiation control device 21 to synchronize the time within the device with the time of the radiation control device 21. The time synchronization is performed when the imaging device 2 is stored in the storage unit 70. The imaging device 2 generates a timing pulse signal that serves as a reference during imaging, using the time based on the time synchronization.

[0019] The following methods may be employed for synchronizing the irradiation device 20 and the imaging device 2. When the imaging device 2 is connected to the medical cart 1 by wire, the timing information generated by the imaging device 2 may be synchronized with the timing information generated by the radiation control device 21. The imaging device 2 may also be controlled to maintain synchronization with the radiation control device 21 even after the connection with the medical cart 1 is terminated. That is, the radiation control device 21 and the imaging device 2 are synchronized when connected by wire, and when connected wirelessly, they operate independently by continuously generating synchronization pulses. The imaging device 2 may perform time synchronization communication with the radiation control device 21 via LAN communication called IEEE 1588 to correct the time difference between them, thereby achieving synchronization. The radiation control device 21 may synchronize the radiation source 22 and the imaging device 2 by transmitting a synchronization signal to each of them. The console 10 may synchronize the radiation source 22 and the imaging device 2 by transmitting a synchronization signal to each of them. If multiple synchronization methods can be adopted, it may be possible to switch from these methods to a method with higher synchronization accuracy.

[0020] The display unit 30 is, for example, a display such as a liquid crystal display or an organic EL display. EL is an abbreviation for Electro Luminescence. The display unit 30 displays still images and dynamic images captured by the imaging device 2 on an examination screen (described later) based on the control of the console 10, etc. The display unit 30 displays a GUI, etc. for accepting various input operations from the user. GUI is an abbreviation for Graphical User Interface. The display unit 30 may be configured as an integral part of the housing of the medical cart 1, may be configured to be detachable from the housing, or may be installed in a location separate from the medical cart 1.

[0021] The operation unit 32 includes, for example, at least one of a mouse, a keyboard, a switch, a button, etc. The operation unit 32 may be, for example, a touch panel integrally combined with a display, or an interface that accepts voice input. The operation unit 32 accepts instructions corresponding to various input operations from the user, converts the accepted instructions into operation signals, and outputs the signals to the radiation control device 21, etc.

[0022] For example, when stored in the storage section 70, the charging section 40 charges an internal power source such as a battery provided in the imaging device 2. The charging section 40 may be charged by receiving power from an external power source, or may be charged by receiving power from a power source provided in the medical cart 1, for example.

[0023] The hub 50 is, for example, a switching hub and has multiple ports. The hub 50 is connected to the radiation control device 21. The access point 60 is connected to the hub 50 via a communication cable. The access point 60 transmits and receives radio waves of a wireless LAN such as Wi-Fi (registered trademark). For example, when the imaging device 2 is removed from the medical cart 1 and used, the imaging device 2 is wirelessly connected to the access point 60, and various data and signals are transmitted and received between the medical cart 1 and the imaging device 2.

[0024] The imaging device 2 is removably stored in the storage unit 70. The storage unit 70 is configured to be able to store a plurality of imaging devices 2. When the imaging device 2 is stored in the storage unit 70, time synchronization is performed between the radiation control device 21 and the imaging device 2.

[0025] [Console 10 configuration and function example] Next, the configuration and functions of the console 10 according to the first embodiment will be described in detail. The console 10 functions as a computer and has a control unit including a processor such as a CPU and a memory. CPU is an abbreviation for Central Processing Unit. The control unit of the console 10 controls the operation of each component, such as the irradiation device 20, the display unit 30, and the operation unit 32. The control unit of the console 10 executes programs stored in memory or the like to realize various processes, such as a still image capture mode, a dynamic capture mode, and an intermittent capture mode. Note that in this embodiment, the console 10 mainly realizes various processes, such as the intermittent capture mode, but this is not limited to this. For example, other control devices, such as the radiation control device 21, may execute various processes, such as the intermittent capture mode, or the console 10 and other control devices may cooperate to execute various processes, such as the intermittent capture mode.

[0026] In this embodiment, the intermittent imaging mode is an imaging mode in which still images and dynamic images are captured multiple times based on a specified imaging period and imaging suspension period from the start to the end of one imaging session. The start of imaging refers to the timing when both the imaging device 2 and the radiation source 22 become ready for an intermittent imaging order and X-ray irradiation is permitted. The end of imaging refers to the timing when the corresponding intermittent imaging order ends and still image imaging and dynamic image imaging for this order are no longer possible. The imaging period refers to the period from the start of imaging to the end of imaging. The console 10 executes the intermittent imaging mode by controlling the radiation source 22 and the imaging device. In the intermittent imaging mode, the console 10 controls the end of imaging depending on the total number of frames of still images and dynamic images.

[0027] The console 10 functions as a setting unit for setting the imaging conditions for the radiation source 22. It is desirable that the console 10 not accept any changes to the imaging conditions for the radiation source 22 and the imaging device 2 from the start to the end of imaging in the intermittent dynamic mode. This allows the imaging conditions for the radiation source 22 and the imaging device 2 to be unified during the intermittent dynamic mode. In the intermittent dynamic mode, the console 10 preferably captures still images and dynamic images under the same irradiation conditions per frame. The imaging conditions refer to the tube voltage (kV), tube current (mA), mAs value, additional filters, and anti-scatter grid. This ensures that still and dynamic imaging are always performed under the same imaging conditions, facilitating radiation dose management. Furthermore, it is possible to ensure that the image quality per frame of still and dynamic images is the same, allowing the image quality of the dynamic imaging to be checked in advance using the still images.

[0028] [About the X-ray irradiation pattern in intermittent shooting mode] Next, an X-ray irradiation pattern in the intermittent imaging mode according to the first embodiment will be described. FIG. 2 is a diagram showing a first irradiation pattern of X-rays emitted from the radiation source 22 in the intermittent imaging mode. The first irradiation pattern involves one still image capture and one dynamic image capture. For example, the frame rate is set to 15 fps, and the first specified frame count is set to 300 frames. First, when the user presses the still image switch 23, still images of the subject's imaging area are captured. In the still image capture, a still image consisting of one frame is acquired. The still image is displayed on the examination screen of the display unit 30. The user checks the patient's positioning while viewing the still image displayed on the examination screen. During this period, the intermittent imaging mode is suspended.

[0029] Once the user confirms that the patient is positioned appropriately, they move on to dynamic imaging. Dynamic imaging begins when the user presses dynamic switch 24. Dynamic switch 24 is continuously pressed throughout dynamic imaging. Dynamic imaging captures dynamic images consisting of 299 frames. In this embodiment, dynamic imaging ends when the total number of frames obtained by adding the number of frames obtained by still image capture and the number of frames obtained by dynamic imaging reaches a first specified number of frames. In other words, intermittent imaging mode ends. Note that even if dynamic imaging has not reached the first specified number of frames, control may be exercised to end the intermittent imaging mode when the maximum imaging time of 10 minutes has elapsed.

[0030] FIG. 3 is a diagram showing a second irradiation pattern of X-rays emitted from the radiation source 22 in the intermittent imaging mode. The second irradiation pattern involves one still image capture and two dynamic image captures. For example, the frame rate is set to 15 fps, and the first specified frame count is set to 300 frames. First, still image capture is performed when the user presses the still image switch 23. In still image capture, a still image consisting of one frame is acquired. The still image is displayed on the examination screen of the display unit 30. The user checks the patient's positioning while viewing the still image on the examination screen. During this period, intermittent imaging is suspended.

[0031] Once the user confirms that the patient is positioned properly, they move on to dynamic imaging. The first dynamic imaging begins when the user presses dynamic switch 24. During the first dynamic imaging, a dynamic image consisting of 150 frames is acquired. The user turns off dynamic switch 24 after a certain period of time has passed. The first dynamic imaging may be automatically terminated when the 150 frames of dynamic imaging are completed. During this period, the intermittent imaging mode is suspended. After a predetermined period of time has passed, the user presses dynamic switch 24 to begin a second dynamic imaging. During the second dynamic imaging, a dynamic image consisting of 149 frames is acquired. In this embodiment, dynamic imaging ends when the total number of frames, calculated by adding the number of frames acquired in one still image imaging and the number of frames acquired in two dynamic imaging, reaches a first specified number of frames. In other words, the intermittent imaging mode ends.

[0032] FIG. 4 is a diagram showing a third irradiation pattern of X-rays emitted from the radiation source 22 in the intermittent imaging mode. In the third irradiation pattern, still image capture is performed twice and dynamic image capture is performed once. For example, the frame rate is set to 15 fps, and the first specified frame number is set to 300 frames. First, the first still image capture is performed when the user presses the still image switch 23. In the still image capture, a still image consisting of one frame is acquired. The still image is displayed on the examination screen of the display unit 30.

[0033] The user checks the patient's positioning while viewing the still image displayed on the examination screen. During this period, intermittent photography is suspended. If the patient's positioning is not appropriate, the user guides the patient to the correct position and instructs the system to take a second still image. When the user presses the still image switch 23, the second still image is taken. During still image photography, a still image consisting of one frame is acquired. The still image is displayed on the examination screen of the display unit 30. The user checks the patient's positioning while viewing the still image on the examination screen. During this period, intermittent photography is suspended.

[0034] Once the user confirms that the patient is properly positioned, they move on to dynamic imaging. Dynamic imaging begins when the user presses the dynamic switch 24. During dynamic imaging, a dynamic image consisting of 298 frames is acquired. In this embodiment, dynamic imaging ends when the total number of frames acquired in one still image capture and the total number of frames acquired in two dynamic image captures reaches a first specified number of frames. In other words, the intermittent imaging mode ends.

[0035] FIG. 5 is a diagram showing a fourth irradiation pattern of X-rays emitted from the radiation source 22 in the intermittent imaging mode. The fourth irradiation pattern involves two still image captures and two dynamic image captures. For example, the frame rate is 15 fps, and the first specified frame count is set to 300 frames. First, the first still image capture is performed when the user presses the still image switch 23. In the still image capture, a still image consisting of one frame is acquired. The acquired still image is displayed on the examination screen of the display unit 30. The user checks the patient's positioning while viewing the still image on the examination screen. During this period, the intermittent imaging is suspended.

[0036] Once the user confirms that the patient is positioned properly, they proceed to the first dynamic imaging. The first dynamic imaging begins when the user presses the dynamic switch 24. In the first dynamic imaging, dynamic images consisting of 150 frames are acquired. The user turns off the dynamic switch 24 after a certain period of time has passed. Note that the first dynamic imaging may be automatically terminated when the dynamic imaging of 150 frames has been completed. During this period, the intermittent imaging mode is suspended.

[0037] If the patient's positioning shifts during the first dynamic imaging due to bodily movement such as coughing, it is necessary to guide the patient back to the correct position and perform the imaging again. In this case, a second still image is taken. The second still image is taken when the user presses the still image switch 23. In the still image capture, a still image consisting of one frame is acquired. The still image is displayed on the examination screen of the display unit 30. The user checks the patient's positioning while viewing the still image on the examination screen. During this period, intermittent imaging is suspended.

[0038] Once the user confirms that the patient is properly positioned, they proceed to the second dynamic imaging. The second dynamic imaging begins when the user presses the dynamic switch 24. During the dynamic imaging, a dynamic image consisting of 148 frames is acquired. In this embodiment, the dynamic imaging ends when the total number of frames acquired in one still image imaging plus the number of frames acquired in two dynamic imaging reaches the first specified number of frames. In other words, the intermittent imaging mode ends.

[0039] [Example of operation of the radiation imaging system 100] 6 is a flowchart showing an example of the operation of the radiation imaging system 100 in the intermittent imaging mode according to the first embodiment. The console 10 including a control unit executes a program stored in a storage unit (not shown) to realize the following processing including control steps.

[0040] For example, when examination information including a patient's radiography order is received in the radiology department, the examination information is sent from the RIS or the like to the medical cart 1. A list screen corresponding to the examination information (not shown) is displayed on the display unit 30 of the medical cart 1. When a user selects specific examination information on the list screen, an imaging screen corresponding to the examination information is displayed on the display unit 30 of the medical cart 1.

[0041] FIG. 7 is a diagram showing an example of an examination screen 300 displayed on the display unit 30 according to the first embodiment. The examination screen 300 includes an imaging order list 301, an image display field 302, an examination end button 303, an output button 304, and a rejected image button 305. The imaging order list 301 is an area displaying a list of imaging order information included in the examination information selected on a list screen or the like. The imaging order information includes the imaging region, imaging direction, imaging category, and the like. The imaging category includes, for example, a still image imaging mode, a dynamic imaging mode, and an intermittent imaging mode that combines still image imaging and dynamic imaging. The imaging category further includes a low-exposure dynamic imaging mode and a low-exposure intermittent imaging mode. Here, when the dynamic imaging mode and the intermittent imaging mode are group A and the low-exposure dynamic imaging mode and the low-exposure intermittent imaging mode are group B, the maximum number of frames that can be irradiated may be set to B>A.

[0042] The image display field 302 is an area that displays radiographic images captured by the imaging device 2. The image display field 302 displays information indicating the system status, such as "Waiting for permission to expose" or "Ready to capture," before capturing an image. Note that while the words "Ready to capture" are displayed in FIG. 7 for convenience, no words are displayed at this stage. The examination end button 303 is a button for ending the examination. The output button 304 is a button for outputting radiographic images, including still images and dynamic images, captured by the imaging device 2 to an external device such as the PACS 40. The rejected image button 305 is a button for discarding radiographic images captured by the imaging device 2 without outputting them.

[0043] 6, the user selects a predetermined radiography order from the radiography order list 301 on the examination screen 300 by operating the operation unit 32. When the user selects radiography order information indicating, for example, intermittent radiography, the console 10 acquires the intermittent radiography order information as the radiography order (step S10).

[0044] When the console 10 acquires the intermittent radiography order information, it instructs the radiography device 2, the radiation source 22, etc. to warm up (step S11). When the warm-up of the radiography device 2, the radiation source 22, etc. is completed, the console 10 displays the message "Ready to radiograph" in the image display field 302 on the examination screen 300, as shown in Fig. 7. Furthermore, the console 10 sets the irradiation conditions in the radiation source 22 based on the selected intermittent radiography order, and transmits the image reading conditions to the radiography device 2 via the access point 60, etc.

[0045] FIG. 8 is a diagram showing an example of the warm-up operation of the imaging device 2 and the radiation source 22 when an intermittent imaging order is made according to the first embodiment. When the radiation source 22 receives a warm-up instruction from the radiation control device 21, it opens the rotor and heats the filament, and maintains these states. When the imaging device 2 receives a warm-up instruction from the console 10 or the like, it performs warm-up (reset) and offset calibration. During the warm-up operation of the imaging device 2 and the radiation source 22, they are controlled so that X-ray irradiation is not permitted even if the still image switch 23 or the dynamic switch 24 is pressed by the user. When the warm-up operation is completed, the imaging device 2 transitions to automatic detection mode. The automatic detection mode is a mode in which accumulation and readout operations are performed according to the set frame rate.

[0046] 6, the console 10 determines whether the still image switch 23 has been pressed by the user (step S12). If the console 10 determines that the still image switch 23 has been pressed by the user, the process proceeds to step S13. In this case, the console 10 controls the radiation control device 21 to irradiate one frame of X-rays from the radiation source 22 toward the subject (step S13).

[0047] 9 is a diagram showing an example of the operation of the radiation source 22 and the imaging device 2 when the still image switch 23 is pressed in the intermittent imaging mode according to the first embodiment. When the still image switch 23 is pressed, the radiation source 22 irradiates one pulse of X-rays, which corresponds to one frame, regardless of the pressing time of the still image switch 23. The imaging device 2 repeatedly executes accumulation and readout operations at a frame rate of, for example, 15 fps. At the timing of the readout operation, the imaging device 2 acquires one frame of radiographic image by detecting one pulse of X-rays irradiated from the radiation source 22. After acquiring the still image, the console 10 proceeds to step S14.

[0048] On the other hand, if the console 10 determines in step S12 that the still image switch 23 has not been pressed by the user, the process proceeds to step S18. The console 10 determines whether the dynamic switch 24 has been pressed (step S18). If the console 10 determines that the dynamic switch 24 has been pressed, the process proceeds to step S19. In this case, the console 10 controls the radiation control device 21 to continuously irradiate the subject with pulsed X-rays from the radiation source 22 (step S19).

[0049] 10 is a diagram showing an example of the operation of the radiation source 22 and the imaging device 2 when the dynamic switch 24 is pressed in the intermittent imaging mode according to the first embodiment. When the dynamic switch 24 is pressed, the radiation source 22 continuously irradiates pulsed X-rays at, for example, 15 fps while the dynamic switch 24 is pressed. The imaging device 2 repeatedly executes accumulation and readout operations at 15 fps, which is the same frame rate as the radiation source 22. During the readout operation at 15 fps, the imaging device 2 detects the X-rays irradiated from the radiation source 22 to obtain a dynamic image composed of multiple frames.

[0050] Furthermore, for dynamic imaging, the frame rate on the imaging device 2 side may be set to 15 fps, and the frame rate on the radiation source 22 side may be set to 7.5 fps. A frame rate of 7.5 fps is half the frame rate of the imaging device 2 side. The radiation source 22 can irradiate X-rays by thinning out the readout operations of the imaging device 2. This reduces the amount of X-ray radiation emitted from the radiation source 22, thereby reducing the radiation exposure dose. Furthermore, since the imaging device 2 detects a smaller amount of X-rays, the size of the image data can be reduced and the imaging time for dynamic images can be extended. Furthermore, since the frame rate on the imaging device 2 side is not changed, offset calibration is not required each time it is switched, and 15 fps and 7.5 fps can be controlled (high-speed) simply by switching the X-ray irradiation.

[0051] Returning to FIG. 6, the console 10 displays the frames captured by the imaging device 2 in the image display field 302 of the examination screen 300 on the display unit 30 (step S14). Image data of the frames captured by the imaging device 2 is transmitted, for example, wirelessly and received by the access point 60 of the medical cart 1. For example, if the exposure in the intermittent imaging mode is for still image capture, a still image is displayed on the display unit 30. The user checks the positioning of the patient while viewing the still image. If the exposure in the intermittent imaging mode is for dynamic imaging, a dynamic image is displayed on the display unit 30. The user performs image diagnosis of the imaging area while viewing the dynamic image.

[0052] At this time, the console 10 may display notification information on the display unit 30 to notify the user of the shooting status in the intermittent shooting mode. FIG. 11 is a diagram showing an example of an examination screen 300 on which the first notification information Ia and the like according to the first embodiment are displayed. The display unit 30 displays the first notification information Ia to notify the user of the shooting status in the intermittent shooting mode, etc., at the lower center of the image display field 302 of the examination screen 300. The display unit 30 corresponds to an example of a notification means. Examples of the first notification information Ia include the number of remaining frames in the intermittent shooting mode and the remaining shooting time. Specifically, the image display field 302 displays the words "Remaining shooting time: 12 seconds / 120 frames" as the first notification information Ia. When the intermittent shooting mode is being performed, the user can accurately grasp the remaining shooting time and the like by checking the first notification information Ia on the examination screen 300. Here, the number of remaining frames is calculated by the following equation (1). Remaining frames = current total number of frames - preset first specified number of frames (1) The remaining shooting time is calculated using the following formula (2). Remaining shooting time = remaining number of frames × (1 × frame rate) (2)

[0053] The display unit 30 also displays second notification information Ib on the upper right side of the image display field 302 of the examination screen 300 to notify the user of the shooting status in the intermittent shooting mode. The second notification information Ib may, for example, indicate the elapsed time from the start of shooting in the intermittent shooting mode to the present. Specifically, the image display field 302 displays the text "5 minutes" as the second notification information Ib, which indicates the elapsed time from the start of shooting in the intermittent shooting mode to the present. The second notification information Ib may also be information indicating, for example, the remaining shooting time, in addition to the elapsed time. The first notification information Ia and the second notification information Ib may also be information other than letters, numbers, symbols, graphics, etc., displayed on the display unit 30. For example, the first notification information Ia and the second notification information Ib may be information such as sound or vibration. In this case, the console 10 outputs a voice, a buzzer sound, or vibration when the remaining shooting time reaches a certain value.

[0054] Returning to FIG. 6 , the console 10 adds the number of frames corresponding to the number of pulses irradiated from the radiation source 22 to the total number of frames (step S15). Specifically, when one frame is irradiated by pressing the still image switch 23, the console 10 adds one frame to the total number of frames. Similarly, when multiple frames are irradiated by pressing the dynamic switch 24, the console 10 adds multiple frames to the total number of frames. The console 10 may obtain information about the frames from the imaging device 2, or may obtain information about the number of pulses irradiated from the irradiation device 20.

[0055] The console 10 determines whether the total number of frames obtained by adding up the total number of frames is less than a predetermined first specified number of frames (upper limit) (step S16). That is, the console 10 determines whether the total number of frames obtained by adding up the number of frames captured during still image capture and the number of frames captured during dynamic image capture is less than the first specified number of frames. The first specified number of frames is a value set based on the total radiation dose per capture from the perspective of risk management. The first specified number of frames can be set according to capture conditions such as the frame rate, and may be set for each capture order. The first specified number of frames may be set before shipment, or may be set by a user or the like after shipment using the operation unit 32, etc. Furthermore, a threshold other than the first specified number of frames may be used as the specified value for determining whether the radiation exposure dose in the intermittent capture mode is within the allowable range. For example, the specified value may be a specified capture time calculated based on the first specified number of frames and the frame rate. This allows management to ensure that the total actual capture time in the intermittent capture mode does not exceed a predetermined capture time.

[0056] If the console 10 determines that the total number of frames is less than the preset first specified number of frames, it returns to step S12. Specifically, this is the case when the number of frames captured in the intermittent shooting mode has not reached the upper limit. As described above, the console 10 repeatedly performs still image capture and dynamic image capture in the intermittent shooting mode until the total number of frames reaches the first specified number of frames.

[0057] On the other hand, if the console 10 determines that the total number of frames is not less than the first predetermined number of frames, the process proceeds to step S17. Specifically, this is the case when the number of captured frames reaches the upper limit in the intermittent imaging mode. In this case, the radiation source 22 and the imaging device 2 each stop imaging.

[0058] FIG. 12 is a diagram showing an example of a first stop operation of the radiation source 22 and the imaging device 2 at the end of the intermittent imaging mode according to the first embodiment. When the total number of frames reaches a first specified number during dynamic imaging in the intermittent imaging mode, the radiation source 22 stops emitting X-rays based on an instruction from the console 10 or the like. After the total number of frames reaches the first specified number, X-ray irradiation is prohibited. Therefore, X-rays are not irradiated even if the dynamic switch 24 is pressed by the user. The imaging device 2 performs a readout operation of the X-rays last irradiated from the radiation source 22 based on an instruction from the radiation control device 21 or the like, and stops the readout operation thereafter. Note that the readout operation may continue after the last X-rays irradiated from the radiation source 22, depending on the settings of the accumulation operation and readout operation.

[0059] FIG. 13 illustrates an example of a second stopping operation of the radiation source 22 and the imaging device 2 at the end of the intermittent imaging mode according to the first embodiment. The second stopping operation describes a case in which dynamic imaging is stopped before the total number of frames captured in the intermittent imaging mode reaches the first specified number of frames. In this embodiment, the second specified number of frames is defined as a specified number of frames that is smaller than the first specified number of frames and that is before the total number of frames reaches the first specified number of frames. For example, if dynamic imaging is stopped at the number of frames immediately before the first specified number of frames, even if dynamic imaging is resumed, the remaining number of frames may be small, resulting in wasted radiation exposure. Therefore, if the number of frames after resuming dynamic imaging is equal to or greater than the second specified number of frames, the console 10 stops the dynamic imaging. The console 10 functions as a changing unit and can change the second specified number of frames each time imaging is started or ended.

[0060] If the dynamic switch 24 is turned off before the total number of frames reaches the first specified number during dynamic imaging in the intermittent imaging mode, the console 10 determines whether the total number of frames is equal to or greater than the second specified number of frames. If the total number of frames is equal to or greater than the second specified number of frames, the console 10 executes control to stop dynamic imaging. For example, the first specified number of frames is 300, the second specified number of frames is 290, and the total number of frames is 292. In this case, the radiation source 22 stops emitting X-rays based on instructions from the console 10 or the like. As a result, X-ray irradiation is prohibited after the total number of frames reaches the second specified number of frames. Therefore, X-rays are not emitted even if the user presses the dynamic switch 24. The imaging device 2 reads out the last X-rays irradiated from the radiation source 22 based on instructions from the radiation control device 21 or the like, and then stops the readout operation thereafter. Note that the readout operation may continue after the last X-rays irradiated from the radiation source 22 depending on the settings of the accumulation operation and readout operation.

[0061] FIG. 14 illustrates an example of a third stop operation of the radiation source 22 and the imaging device 2 at the end of the intermittent imaging mode according to the first embodiment. For example, after the intermittent imaging mode is initiated, X-rays may not be emitted from the radiation source 22 due to the patient's condition. When the intermittent imaging mode is initiated, the imaging device 2 repeatedly executes accumulation and readout operations according to the set frame rate. If the imaging time from the start of the intermittent imaging mode exceeds a predetermined time, the console 10 executes control to forcibly stop the intermittent imaging mode. The predetermined time can be set arbitrarily, taking into account, for example, the examination time of other patients. To prevent image quality abnormalities due to offset correction, a value specifying the acquisition interval between the offset calibration image and the captured image may be set. Based on instructions from the console 10, etc., when the imaging time exceeds the predetermined time, the imaging device 2 stops accumulation and readout operations according to the frame rate. After the predetermined time has elapsed, X-rays will not be emitted even if the user presses the power switch 24, etc.

[0062] Returning to FIG. 6, the console 10 outputs image data of the dynamic images obtained in the intermittent imaging mode to an external device such as a PACS (step S17). In this case, the console 10 outputs image data to which additional information including patient information, examination information, etc. is added to the PACS. The console 10 may also store the image data to which additional information is added in a memory (not shown) within the medical cart 1. The image data may also include still images taken in the intermittent imaging mode to confirm positioning. When dynamic images are taken multiple times, the console 10 may connect the dynamic images from each time to generate a series of dynamic images.

[0063] In the first embodiment, when an intermittent imaging mode including still image imaging and dynamic imaging is performed, the total number of frames is calculated by adding the number of frames acquired by still image imaging and the number of frames acquired by dynamic imaging. The console 10 ends the intermittent imaging mode when the total number of frames reaches a preset first specified number of frames, and can control the X-ray irradiation so that the total number of frames does not exceed the first specified number of frames. As a result, according to the first embodiment, it is possible to take into account the total radiation dose for still image imaging and dynamic imaging, and to accurately manage the radiation dose for one imaging (examination).

[0064] Second Embodiment In the second embodiment, both still and dynamic image capture are performed by pressing a single exposure switch, rather than providing separate still image switch 23 and dynamic image switch 24 as in the first embodiment. In the following, components that are substantially the same as those in the first embodiment are given the same reference numerals, and common descriptions will be omitted or simplified.

[0065] [Example of operation of the radiation imaging system 100] 15 is a flowchart showing an example of the operation of the radiation imaging system 100 in the intermittent imaging mode according to the second embodiment. The console 10 including the control unit executes a program stored in a storage unit (not shown) to realize the following processing including control steps.

[0066] When the user selects an intermittent radiography order on the examination screen 300, the console 10 acquires intermittent radiography order information as the radiography order (step S20).

[0067] When the console 10 acquires the intermittent radiography order information, it instructs the radiography device 2, the radiation source 22, etc. to warm up (step S21). Furthermore, based on the selected intermittent radiography order information, the console 10 sets the radiation irradiation conditions for the radiation source 22 and transmits the image reading conditions to the radiography device 2 via the access point 60, etc.

[0068] The console 10 acquires the default exposure mode for the selected intermittent radiography order (step S22). For example, if the type of radiography order is an intermittent radiography order, the exposure modes include still image radiography and dynamic radiography. As the default exposure mode for the intermittent radiography order, still image radiography is set because the patient's positioning is checked first.

[0069] The console 10 determines whether there is a request to change the exposure mode (step S23). If the console 10 determines that there is no request to change the exposure mode, the process proceeds to step S24. For example, when starting imaging in the intermittent imaging mode, still image imaging, which is initially set as the exposure mode, is performed. In this case, the console 10 proceeds to step S24 without changing the exposure mode.

[0070] On the other hand, if the console 10 determines that there is a request to change the exposure mode, the process proceeds to step S31. For example, when still image capture is completed in the intermittent imaging mode, dynamic imaging is performed subsequently. In this case, a change request to change the exposure mode from still image capture to dynamic imaging is supplied to the console 10 from the radiation control device 21 or the like.

[0071] The console 10 changes the exposure mode (step S31). For example, when still image capturing is completed in the intermittent imaging mode, the console 10 changes the exposure mode from still image capturing to dynamic imaging.

[0072] The console 10 determines whether the user has pressed the exposure switch 25 (step S24). An operation signal corresponding to the user pressing the exposure switch 25 is supplied to the console 10 via, for example, the radiation control device 21. If the console 10 determines that the user has pressed the exposure switch 25, it proceeds to step S25.

[0073] The console 10 determines whether the current exposure mode is a still image (step S25). If the console 10 determines that the current exposure mode is a still image, the process proceeds to step S26. The console 10 controls the radiation control device 21 to irradiate one frame of X-rays from the radiation source 22 toward the subject based on an imaging instruction for still image imaging (step S26). After step S26 is completed, the process proceeds to step S27.

[0074] On the other hand, if the console 10 determines in step S25 that the exposure mode is not for still images, the process proceeds to step S32. That is, the exposure mode is set to for dynamic images. The console 10 controls the radiation control device 21 to continuously irradiate the subject with pulsed X-rays from the radiation source 22 while the exposure switch is pressed based on an imaging instruction for dynamic imaging (step S32). After step S26 is completed, the process proceeds to step S27.

[0075] The console 10 displays the frames captured by the imaging device 2 in the image display field 302 of the examination screen 300 on the display unit 30 (step S27). Specifically, image data of the frames captured by the imaging device 2 is transmitted wirelessly and received by the access point 60 of the medical cart 1, etc. For example, when the exposure mode is still image capture, a still image is displayed on the display unit 30. The user checks the positioning of the patient while viewing the still image. When the exposure mode is dynamic imaging, a dynamic image is displayed on the display unit 30. The user performs image diagnosis of the imaging area while viewing the dynamic image.

[0076] The console 10 adds the number of frames corresponding to the number of pulses irradiated from the radiation source 22 to the total number of frames (step S28). Specifically, when one frame is irradiated by pressing the still image switch 23, the console 10 adds one frame to the total number of frames. When multiple frames are irradiated by pressing the dynamic image switch 24, the console 10 adds multiple frames to the total number of frames.

[0077] The console 10 determines whether the total number of frames obtained by adding up is less than a first specified number of frames (upper limit) that is set in advance (step S29).

[0078] If the console 10 determines that the total number of frames is less than the preset first specified number of frames, it returns to step S23. Specifically, this is the case when the number of frames captured in the intermittent shooting mode has not reached the upper limit. In this case, the console 10, as described above, repeatedly performs still image capture and dynamic image capture in the intermittent shooting mode until the total number of frames reaches the first specified number of frames.

[0079] On the other hand, if the console 10 determines that the total number of frames is not less than the preset first specified number of frames, the process proceeds to step S30. Specifically, this is the case when the number of captured frames reaches the upper limit in the intermittent imaging mode. In this case, the radiation source 22 and the imaging device 2 each stop imaging.

[0080] The console 10 outputs image data corresponding to the dynamic images obtained in the intermittent imaging mode to an external device such as a PACS (step S30). In this case, the console 10 outputs image data to which additional information, including patient information, examination information, etc., is added to the PACS. The image data may also include still images captured in the intermittent imaging mode for confirming positioning. When dynamic images are captured multiple times, the console 10 may connect the dynamic images from each capture to generate a series of dynamic images.

[0081] According to the second embodiment, it is possible to achieve the same effects as those of the first embodiment described above. That is, in the intermittent imaging mode, the total radiation dose for still image and dynamic imaging can be taken into consideration, so that the radiation dose for one imaging (examination) can be accurately managed. Furthermore, since a single exposure switch is used to generate a trigger for starting still image imaging and dynamic imaging, the radiation imaging system 100 can be configured simply. Furthermore, by using a single exposure switch, it is possible to avoid erroneous exposure due to operational errors and also to simplify operation.

[0082] It should be noted that the following processing can be added to the flowcharts showing the series of steps in the intermittent shooting mode described above with reference to FIGS. The console 10 preferably performs at least one of offset correction, gain correction, defect correction, afterimage correction, and gradation correction before displaying a frame on the display unit 30. When performing offset correction, the console 10 may acquire an offset correction image (dark image) during the first intermittent shooting and perform correction using the same offset correction image throughout the shooting period. This simplifies and speeds up internal processing during offset correction. The console 10 may also acquire an offset correction image for each group of still images and dynamic images in intermittent shooting mode.

[0083] Frame information indicating which frame image of which dynamic shooting in the intermittent shooting mode it is or which frame of which dynamic shooting it is may be added to the image by overlay. Instead of adding the frame information to the image by overlay, it may be added to the image's supplementary information or header information. Information that identifies which intermittent shooting group the frame belongs to may be added to the image data. This makes it possible to cue or display images in units of intermittent shooting when displayed.

[0084] In addition to the stopping operations shown in FIGS. 12 to 14, the console 10 may automatically determine that imaging has ended when any of the following conditions (1) to (6) is met. (1) When the total exposure dose reaches the specified exposure dose. (2) When the total time of shooting and interruption reaches the specified time. For example, the maximum time can be set at three minutes, during which time shooting and interruption can be allowed any number of times. (3) When the interruption time for intermittent shooting reaches the specified time. As a result, if the interruption time exceeds a predetermined time, the image capturing can be stopped temporarily and a reset process can be performed in consideration of the image capturing quality. (4) When the number of intermittent shots reaches a predetermined number. Considering that time and dose may not be intuitive for technicians, managing intermittent exposures at a feasible number of times makes it easier for technicians to understand when to end the exposure. (5) When the number of exposure frames in one dynamic exposure exceeds the specified value. (6) A user performs a termination operation by pressing a switch on the imaging device 2 or by operating the screen of the console 10. The above (1) to (5) may be configured so that the settings can be switched for each imaging order and each operating frame rate by operating the operation unit 32 or the like.

[0085] The photographing order in each of the normal dynamic photographing mode and the intermittent photographing mode according to this embodiment may be switchable between any of the following (1) to (3). (1) The setting range of irradiation conditions including the X-ray tube voltage (kV), tube current (mA), and mAs value In dynamic imaging in the intermittent imaging mode, deterioration of the imaging device 2 can be suppressed by narrowing the settable range in order to maintain the ready state of the imaging device 2 for a long time. (2) Switching the warm-up time of the imaging device 2 To enable offset correction with one offset calibration in an intermittent photographing mode in which photographing time is long. (3) Switching the remaining battery capacity during wireless shooting In the shooting mode where the shooting time is long, it is possible to prevent the battery from running out in the middle of shooting.

[0086] If either of the following conditions (1) or (2) is met before starting the intermittent shooting mode, the console 10 may display a warning or error on the display unit 30, or may prohibit the start of the intermittent shooting mode. (1) When the relationship of shooting period > synchronization maintenance time is satisfied The shooting time is the shooting time in the intermittent shooting mode, which includes pre-set still image shooting and dynamic image shooting. The synchronization maintenance time is the time during which accurate synchronization can be achieved with the parent cart 1 when the imaging device 2 is removed from the cart 1 and wirelessly connected. (2) When the relationship of the number of frames that can be irradiated > the number of times that the radiation source 22 can be irradiated is satisfied

[0087] While the preferred embodiments of the present disclosure have been described in detail above with reference to the accompanying drawings, the technical scope of the present disclosure is not limited to such examples. Furthermore, various modifications and improvements will naturally fall within the technical scope of the present disclosure, provided that they are within the scope of the technical ideas described in the claims of those skilled in the art. [Explanation of symbols]

[0088] 1 Medical cart 2. Radiography equipment, imaging equipment 10 Console (control unit, change means, setting means) 20 Radiation irradiation device, irradiation device (radiation detector) 21 Radiation Control Device 22 Radiation source 30 Display unit (notification means) 100 Radiography system (dynamic imaging system)

Claims

1. a radiation source and a radiation detector, a dynamic image capturing system that captures a still image consisting of a single frame and a dynamic image consisting of a plurality of frames by irradiating a subject with radiation from the radiation source and detecting the radiation that has passed through the subject with the radiation detector, a control unit that controls the radiation source and the radiation detector so as to operate in an intermittent imaging mode in which the still images and dynamic images are captured multiple times based on a designated imaging period and imaging interruption period from the start to the end of one imaging session, The control unit controls the end of image capture depending on the total number of frames of still images and dynamic images. Dynamic imaging system.

2. The control unit ends the shooting when the total number of frames reaches a first specified number of frames. The dynamic image capturing system according to claim 1 .

3. The control unit ends the shooting when the total number of frames during the shooting suspension period reaches a second specified number of frames. The dynamic image capturing system according to claim 1 .

4. a change unit that can change the second specified number of frames every time from the start of photography to the end of photography; The dynamic image capturing system according to claim 3 .

5. The control unit ends the photographing when the elapsed time from the start of the one photographing reaches a specified photographing period. The dynamic image capturing system according to claim 1 .

6. The radiation detector performs an image readout operation for capturing the still image and the dynamic image at the same frame rate. The dynamic image capturing system according to claim 1 .

7. The still image and / or the dynamic image can be captured multiple times between the start and end of the single capture. The dynamic image capturing system according to claim 1 .

8. a setting unit for setting imaging conditions for the radiation source; The setting means does not accept any change in the photographing conditions from the start to the end of one photographing session. The dynamic image capturing system according to claim 1 .

9. The setting means sets the same photographing conditions for photographing the still images and the dynamic images. The dynamic image capturing system according to claim 8 .

10. a notification means for notifying information regarding the total number of frames; The dynamic image capturing system according to claim 1 .

11. a radiation source and a radiation detector, a dynamic image capturing method for a dynamic image capturing system that captures a still image consisting of a single frame and a dynamic image consisting of a plurality of frames by irradiating a subject with radiation from the radiation source and detecting the radiation that has passed through the subject with the radiation detector, the method comprising: a control step of controlling the radiation source and the radiation detector so that the radiation source and the radiation detector operate in an intermittent imaging mode in which the still images and dynamic images are captured multiple times based on a designated imaging period and imaging interruption period from the start to the end of one imaging session, In the control step, the end of the photographing is controlled according to the total number of frames of the still images and the dynamic images. Dynamic imaging method.

12. a radiation source and a radiation detector, a computer included in a dynamic image capturing system that captures a still image consisting of a single frame and a dynamic image consisting of a plurality of frames by irradiating a subject with radiation from the radiation source and detecting the radiation that has passed through the subject with the radiation detector, a control unit that controls the radiation source and the radiation detector to operate in an intermittent imaging mode in which the still images and dynamic images are captured multiple times based on a designated imaging period and imaging interruption period from the start to the end of one imaging session, and controls the end of imaging in accordance with the total number of frames of the still images and dynamic images; A program to function as a

Images