Radiographic system, imaging support method for radiographic system, and program

Abstract

To appropriately present the presence or absence of synchronization of signals of an imaging device, a radiographic system 100 is provided with: a radiographic imaging device 1 that is synchronized with an irradiation device 2; a presentation unit 31 that presents synchronization information regarding the radiographic imaging device; and a control unit 211 of the presentation unit. The control unit presents the synchronization information to the presentation unit when the radiographic imaging device is stored in a storage unit 26 or when the radiographic imaging device is taken out of the storage unit. Alternatively, when the radiographic imaging device is selected, the control unit presents the synchronization information to the presentation unit when imaging order information is acquired, added, and selected in the control unit.

Description

Radiography system, imaging support method for radiation imaging system, and program

[0001] The present invention relates to a radiography system, an imaging support method for a radiography system, and a program.

[0002] Conventionally, radiation imaging systems have been used that include a radiation irradiation device that generates radiation and a radiation imaging device that receives radiation and generates radiation image data. Radiography includes a dynamic imaging technique in which a subject is continuously imaged at regular intervals to obtain multiple frame images. Dynamic imaging is divided into two types: "dynamic" imaging, which requires synchronization between the timing of radiation exposure and the timing of radiation image generation, and "fluoroscopic" imaging, which requires synchronization only between the start and end of imaging. For this reason, the radiation imaging systems described in Patent Documents 1 and 2 perform synchronization processing to synchronize the timing of image generation by the radiation imaging device with the irradiation by the radiation irradiation device.

[0003] JP 2023-2241 A JP 2023-5 A

[0004] In the system of Patent Document 1, the console recognizes the synchronization status, but there is no mention of explicitly indicating the synchronization status to the radiographer. In the system of Patent Document 2, the radiographer displays whether the signal is synchronized or not on the display unit. However, there are problems with this, such as only displaying the information on the display screen at a time when the user is not likely to be looking at the display unit during the radiographing workflow. For this reason, there is room for improvement in terms of drawing the attention of the radiographer.

[0005] An object of the present invention is to more effectively draw the user's attention by informing the user at an appropriate timing and in an appropriate manner whether or not a radiographic imaging device is synchronized.

[0006] In order to solve the above problem, the radiation imaging system of the present invention comprises: a radiation imaging device that captures video images in synchronization with a radiation irradiation device; a presentation unit that presents information related to the synchronization status of the radiation imaging device with the radiation irradiation device; and a control unit that controls the presentation unit, wherein the control unit determines the synchronization status of the radiation imaging device at least one of the following times: when the radiation imaging device is stored in a storage unit, when the radiation imaging device is removed from the storage unit, when the radiation imaging device that will perform imaging is selected, when the control unit acquires imaging order information from an external device, when imaging order information is added, or when imaging order information is selected by a user, and causes the presentation unit to present information related to the synchronization status of the radiation imaging device.

[0007] Furthermore, the imaging support method for a radiation imaging system of the present invention is a method for supporting imaging of a radiation imaging system having a radiation imaging device that performs video imaging in synchronization with a radiation irradiation device, a presentation unit that presents information regarding the synchronization status of the radiation imaging device with the radiation irradiation device, and a control unit that controls the presentation unit, wherein the synchronization status of the radiation imaging device is determined at least at one of the following times: when the radiation imaging device is stored in a storage unit, when the radiation imaging device is removed from the storage unit, when the radiation imaging device that will perform imaging is selected, when the control unit acquires imaging order information from an external device, when imaging order information is added, or when imaging order information is selected by a user, and the presentation unit is caused to present information regarding the synchronization status of the radiation imaging device.

[0008] The program of the present invention causes a computer of a radiation imaging system having a radiation imaging device that captures moving images in synchronization with a radiation irradiation device, a presentation unit that presents information regarding the synchronization status of the radiation imaging device with the radiation irradiation device, and a control unit that controls the presentation unit to realize a function of determining the synchronization status of the radiation imaging device at at least one of the following times: when the radiation imaging device is stored in a storage unit, when the radiation imaging device is removed from the storage unit, when the radiation imaging device that will capture images is selected, when the control unit acquires imaging order information from an external device, when imaging order information is added, or when imaging order information is selected by a user, and causing the presentation unit to present information regarding the synchronization status of the radiation imaging device.

[0009] According to the present invention, it is possible to appropriately notify the user whether or not the radiographic imaging device is synchronized, and to more effectively draw the user's attention.

[0010] 1 is a schematic configuration diagram showing a radiography system according to an embodiment of the present invention. FIG. 1 is a block diagram showing the configuration of a medical visit cart. FIG. 2 is a diagram showing an example of a display screen for examination information displayed on a display unit. FIG. 3 is a diagram showing an example of an examination screen for selected examination information. FIG. 4 is a diagram showing an examination screen on which radiography order information is added. FIG. 5 is a flowchart of synchronization processing. FIG. 6 is a flowchart showing processing of synchronization status presentation processing (1). FIG. 7 is a display example in which an icon in the image display area of ​​the examination screen is highlighted. FIG. 8 is a diagram showing an example of a positive screen. FIG. 9 is a diagram showing an example of a negative screen. FIG. 10 is a flowchart showing processing of synchronization status presentation processing (2). FIG. 11 is a flowchart showing processing of synchronization status presentation processing (3). FIG. 12 is an explanatory diagram showing a state in which an FPD is stored in a storage unit. FIG. 13 is a flowchart showing processing of synchronization status presentation processing (4). FIG. 14 is an explanatory diagram showing a state in which an FPD is removed from a storage unit. FIG. 15 is a diagram showing an example of a negative screen. FIG. 16 is a flowchart showing processing of synchronization status presentation processing (5). FIG. 17 is a flowchart showing processing of battery remaining amount presentation processing (1). FIG. 18 is a diagram showing an example of a negative screen. FIG. 19 is a flowchart showing processing of battery remaining amount presentation processing (2). FIG. 1 is a flowchart showing the processing of a remaining battery amount presentation process (5). FIG. 2 is a flowchart showing the processing of a device information presentation process (1). FIG. 3 is a diagram showing an example of a device information presentation screen. FIG. 4 is a flowchart showing the processing of a device information presentation process (2). FIG. 5 is a flowchart showing the processing of a device information presentation process (3). FIG. 6 is a flowchart showing the processing of a device information presentation process (4).

[0011] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail with reference to the accompanying drawings, but the present invention is not limited to the illustrated examples.

[0012] [General Configuration of Radiography System] The configuration of the apparatus according to this embodiment will be described with reference to Figures 1 and 2. Figure 1 is a general configuration diagram showing a radiography system 100. Figure 2 is a block diagram showing the configuration of a medical examination cart RC.

[0013] The radiation imaging system 100 is installed in a medical facility such as a hospital. A user U, such as a radiographer at the medical facility, makes rounds on patients. At that time, the user U moves to the destination, such as a ward or operating room, where the patient is located, together with the radiation imaging system 100, and performs radiation imaging on the patient. Here, an example is shown in which the destination is a ward, and a bed B is installed in the ward. A patient subject S, who is the subject of the radiation imaging, is radiographed while, for example, in a supine position on the bed B.

[0014] The radiation imaging system 100 includes an FPD 1, which is a radiation imaging device, and a mobile radiation irradiation device, a medical examination cart RC. The FPD 1 and the medical examination cart RC can communicate with each other via, for example, wireless communication.

[0015] The radiation imaging system 100 includes one or more FPDs 1. The radiation imaging system 100 includes at least one FPD 1 capable of both still and video imaging. Furthermore, the radiation imaging system 100 may also include an FPD 1 capable of only still imaging. Still imaging refers to acquiring an image of a subject S in response to a single imaging operation. Although the FPD and the radiation irradiator are synchronized during still imaging, synchronization occurs immediately before irradiation (at least after the irradiation button is pressed). In contrast, synchronization during dynamic imaging, which will be described later, differs from synchronization during still imaging in that it occurs before the irradiation button is pressed. Furthermore, synchronization during still imaging is a series of sequential request and response operations, in which the following operations are performed for each irradiation: irradiation start request → FPD imaging preparation - completion → irradiation permission → irradiation → readout. In contrast, synchronization during dynamic imaging is a non-sequential operation in which sequential communication is not performed between the radiation irradiator and the FPD for each irradiation. In this respect, synchronization during still imaging and dynamic imaging also differ. In the present specification and claims, unless otherwise specified, the term "synchronization" does not include "synchronization of still image capture," but refers to synchronization of video capture. Video capture refers to capturing multiple images of subject S by taking multiple consecutive images of the subject S in response to a single capture operation. Among video capture methods, a method of capturing images synchronously with pulse irradiation in which pulsed radiation such as X-rays is repeatedly irradiated at predetermined time intervals is called dynamic capture. In the following description, dynamic capture may also be referred to as capturing dynamic images.

[0016] [FPD] The FPD 1 is a device that generates radiation image data corresponding to the radiation R emitted from the radiation generating device 2. The FPD 1 is configured in a panel shape. The FPD 1 is portable. A user U can use the FPD 1 by mounting it on an imaging table. The user U can use the FPD 1 by placing it horizontally between the subject S and a bed B. In this case, the subject S is in a supine position on the bed. The user U can also use the FPD 1 by placing it between the subject S and the bed, as shown in FIG. 1.

[0017] The FPD 1 includes, for example, a scintillator, a PD, a TFT switch, etc. PD is an abbreviation for Photo Diode. TFT is an abbreviation for Thin Film Transistor. The scintillator, PD, TFT switch, etc. are not shown in the figure. The scintillator converts incident radiation R into light. The PDs are arranged in a matrix corresponding to the pixels. The TFT switches are arranged corresponding to each PD. The incident radiation R is converted into light by the scintillator and then incident on the PD. The PD that receives the incident radiation R accumulates the radiation R as an electric charge for each pixel. The electric charge accumulated in the PD flows out from the TFT switch to a signal line. The electric charge is amplified and A / D converted into radiation image data. The radiation image data is output to the medical cart RC. The above-mentioned FPD 1 is an indirect conversion type. However, the FPD 1 may be configured as a direct conversion type that directly converts radiation R into an electrical signal.

[0018] [Medical Cart] As shown in FIG. 2, the medical cart RC can communicate with the RIS 40 via a communication network N. RIS is an abbreviation for Radiology Information Systems. The RIS 40 is a system that manages examinations using radiation equipment and everything from treatment reservations to examination results. The medical cart RC may also be able to communicate with an electronic medical record system and consoles provided in other radiography systems via the communication network N. The medical cart RC may also be able to communicate with other medical carts, PACS, other examination devices, bed systems, etc. PACS is an abbreviation for Picture Archiving and Communication System. The communication network N is wireless. However, the communication network N may also be wired.

[0019] The medical cart RC includes a radiation generating device 2 and a console 3 .

[0020] The radiation generating device 2 includes a device main body 21, an irradiation instruction switch 22, a tube 23, a tube support section 24, and a collimator 25. The radiation generating device 2 further includes a generator 213, a storage section 26 for the FPD 1, an optical imaging section 28, and a second display section 29. The radiation generating device 2 is movable by wheels 27 provided on the housing of the device main body 21.

[0021] The irradiation instruction switch 22 outputs an operation signal to the device main body 21 in response to an operation by the user U. In Fig. 1, the irradiation instruction switch 22 sends the operation signal to the device main body 21 via a wired connection. However, the irradiation instruction switch 22 may send the operation signal to the device main body 21 wirelessly.

[0022] The generator 213 receives an imaging instruction signal from the control unit 211, which will be described later, by operating the irradiation instruction switch 22. The generator 213 applies a voltage according to preset imaging conditions to the tube 23. The generator 213 also supplies a current according to the imaging conditions to the tube 23.

[0023] The tube 23 generates radiation R (such as X-rays) by applying a voltage and energizing it from the generator 213. At this time, the tube 23 generates radiation R at a dose and in a manner according to the imaging conditions set in advance. The tube 23 irradiates the radiation R from an irradiation port.

[0024] The tube support 24 is an arm that supports the tube 23. The tube support 24 has a support part 241 that extends upward from the device main body 21 and a support part 242 that extends forward from the top of the support part 241. The tip of the support part 242 supports the tube 23. The tube support 24 also has a joint mechanism (not shown). The tube support 24 can move the tube 23 in the X-axis direction, Y-axis direction, and Z-axis direction using the joint mechanism. The X-axis direction is the left-right direction on the paper surface of FIG. 1. The X-axis direction corresponds to the front-rear direction of the radiation generation device 2. The Y-axis direction is a direction perpendicular to the paper surface of FIG. 1. The Y-axis direction corresponds to the width direction of the radiation generation device 2. The Z-axis direction is the up-down direction on the paper surface of FIG. 1. The Z-axis direction is the vertical direction. Furthermore, the tube support part 24 can rotate the tube 23 around rotation axes parallel to the X-axis, Y-axis, and Z-axis by using an articulation mechanism, thereby enabling the tube support part 24 to change the irradiation direction of the radiation R.

[0025] The collimator 25 is attached to the irradiation port of the housing of the bulb 23. The collimator 25 focuses the radiation R. The collimator 25 makes the irradiation field of the radiation R a predetermined rectangular shape. The collimator 25 also includes a lamp button (not shown). When the user operates the lamp button, the collimator 25 irradiates the range that will become the irradiation field of the radiation R with visible light.

[0026] The optical imaging unit 28 has an optical system such as a lens and an imaging element such as a CCD or CMOS. CCD is an abbreviation for Charge Coupled Device. CMOS is an abbreviation for Complementary Metal Oxide Semiconductor. In this embodiment, the optical imaging unit 28 is provided in the housing of the collimator 25. Note that the optical imaging unit 28 may also be provided in the housing of the tube 23 or the tube support 24. The optical imaging unit 28 optically captures the subject S as a subject using visible light under the control of the control unit 211 to generate optical image data. Furthermore, the optical imaging unit 28 outputs the optical image data to the control unit 211, etc. The optical imaging unit 28 optically captures the subject S to generate optical image data of a still image or dynamic (such as a live image) image.

[0027] The second display unit 29 is composed of an LCD, an EL display, or the like. LCD is an abbreviation for Liquid Crystal Display. EL is an abbreviation for Electro-Luminescence. The second display unit 29 displays various information according to display information. The display information is input to the second display unit 29 from the control unit 211, which will be described later. The second display unit 29 is provided on the outside of the housing of the bulb 23. It is assumed that the bulb 23 is oriented vertically downward. In this case, the second display unit 29 is attached to the cover of the bulb 23 so as to face forward (to the right in FIG. 1 ).

[0028] The storage unit 26 is provided on the rear surface of the device main body 21 and stores the FPD 1 when not in use. The storage unit 26 can store one or more FPDs 1. In this embodiment, the storage unit 26 has the following configuration as an example. The storage unit 26 has three slots that can store the FPDs 1. Each slot has a connector therein that can be connected to a connector (not shown) provided on the FPD 1. Each connector is connected to a power supply circuit 262. The power supply circuit 262 can charge the battery of the FPD 1 through the connector. Only one of the three slots has a connector 261 that has a communication function for performing synchronization processing with the radiation generation device 2 for the FPD 1. In FIG. 2, only the connector 261 with the communication function is illustrated.

[0029] [Clinic cart: console] The console 3 is composed of a PC, a mobile terminal, or a dedicated device. PC is an abbreviation for personal computer. The console 3 is mounted on top of the device main body 21. The console 3 manages various information for radiographic imaging. The console 3 also acquires radiographic image data generated by the FPD 1. The console 3 can store the radiographic image data itself or transmit it to other external devices (such as a PACS).

[0030] In this embodiment, the device main body 21 and the console 3 are housed in a single housing and integrated into one unit, but the device main body 21 and the console 3 may be separate units.

[0031] The console 3 includes a control unit, a storage unit, a communication unit, a display unit 31, an operation unit 32, and an audio output unit 33. The control unit, storage unit, and communication unit of the console 3 are respectively served by the control unit 211, storage unit 212, and communication unit 214 of the radiation generation device 2. The console 3 may be configured to include dedicated control units, storage units, and communication units. In this case, it is preferable that the control unit 211 of the radiation generation device 2 and the control unit of the console 3 can communicate with each other via a wired connection.

[0032] The control unit 211 is connected to each unit of the radiation generating device 2 except for the tube 23 so as to be able to communicate with them. The control unit 211 is composed of a CPU, RAM, etc. The CPU reads out various programs stored in the storage unit 212 and loads them into the RAM. The CPU then executes various processes in cooperation with the loaded programs. As a result, the CPU controls each unit of the radiation generating device 2 and the console 3.

[0033] The storage unit 212 is configured by a non-volatile memory, a HDD, etc. The storage unit 212 stores various programs executed by the control unit 211, parameters required for executing the programs, files, and other various data. The storage unit 212 stores programs for executing various processes described below.

[0034] The storage unit 212 also stores various information related to the FPD 1 registered with the medical cart RC. This information includes information on the synchronization status and expiration date of the registered FPD 1, which will be described later. This information also includes information indicating which radiography order the FPD 1 will be used for, which will be described later. The storage unit 212 also stores examination information and radiography order information, which will be described later, for the medical cart RC.

[0035] The communication unit 214 is configured with a communication module etc. The communication unit 214 is capable of transmitting and receiving various signals and various data to and from an external device. The external device is the wirelessly connected FPD 1, the RIS 40 connected via the communication network N, etc.

[0036] The display unit 31 is configured with an LCD, an EL display, etc. The display unit 31 displays various information in accordance with display information input from the control unit 211.

[0037] The operation unit 32 includes, for example, one or more of a keyboard, a pointing device, a touch panel, etc. The touch panel is formed integrally with the display screen of the display unit 31. The touch panel may also be formed integrally with the display screen of the second display unit 29. The operation unit 32 accepts operation input from the user U and outputs the operation information to the control unit 211.

[0038] The audio output unit 33 includes an amplifier, a speaker, etc. The audio output unit 33 outputs audio in accordance with audio information input from the control unit 211.

[0039] [Examination Information and Radiography Order] The console 3 can acquire examination information for the medical cart RC from the RIS 40 via the communication unit 214. Furthermore, new examination information and radiography order information may be added to the console 3 from the RIS 40. FIG. 3 shows an example of a display screen 311 of examination information displayed on the display unit 31. The control unit 211 displays one or more pieces of examination information side by side in a list 311a on the display screen 311. The examination information is information related to a scheduled examination. Each piece of examination information includes the patient ID, the patient's name, the body part to be imaged, the scheduled date and time of imaging, the size of the FPD 1 corresponding to the imaging, the imaging conditions, etc.

[0040] The control unit 211 accepts a selection input of examination information displayed in the list 311a from the user via the operation unit 32. When examination information is selected from the list 311a, the control unit 211 displays an examination screen 312 for the selected examination information. Fig. 4 shows an example of the examination screen 312 for the selected examination information.

[0041] The examination screen 312 displays an image display area 312a, a patient information display area 312b, an imaging order display area 312c, a reading condition setting button 312d, and the like.

[0042] The image display area 312a displays an icon F representing one or more FPDs 1 registered in the console 3. Each FPD 1 used in a medical facility is assigned an individual serial number. The user U can register one or more FPDs 1 to be used for radiography by inputting the serial number from the operation unit 32. When the FPD 1 is registered, the control unit 211 requests and acquires information such as specifications of the registered FPD 1 from the FPD 1 and the RIS 40. The acquired information such as specifications of the FPD 1 includes, for example, the size that can be imaged and whether dynamic imaging is supported. The acquired information such as specifications of the FPD 1 can also be input by the user U from the operation unit 32.

[0043] The control unit 211 may periodically communicate with each registered FPD 1 via the communication unit 214. In this case, the control unit 211 determines whether wireless communication is possible with each FPD 1. For example, an FPD 1 placed in an area of ​​the medical facility away from the medical cart RC cannot perform wireless communication. The control unit 211 may control the display unit 31 so that the icon F of such an FPD 1 is not displayed in the image display area 312a.

[0044] The patient information display area 312b is an area for displaying patient information of the subject S to be examined. The reading condition setting button 312d is a button for setting reading conditions during imaging. The reading conditions that can be set include whether or not to perform automatic reading, the reading size during imaging, the vertical and horizontal reading direction, the reading position, the resolution, etc.

[0045] The imaging order display area 312c displays an icon C of the imaging order included in the selected examination information. The imaging order indicates the radiographic image capturing to be performed in the examination whose examination information is displayed in the imaging order display area 312c. Multiple radiographic image capturing may be scheduled for one examination. In this case, an imaging order is displayed for each individual radiographic image capturing. Furthermore, these multiple imaging orders are displayed in order from top to bottom in the order in which the imaging will be performed.

[0046] The memory unit 212 stores a unique order number and imaging conditions for each piece of imaging order information. The imaging conditions include the imaging type, tube voltage, tube current, current-time product (mAs value), imaging region, imaging direction, S value, etc. The S value is sensitivity equivalent to the radiation dose during radiography. Furthermore, the imaging conditions for a dynamic imaging order include the frame rate. Imaging types include still image imaging and dynamic imaging. Furthermore, the imaging conditions include whether or not an additional filter is used and the type thereof, and whether or not a grid is used and the type thereof. The additional filter is equipment used on the radiation generating device 2 side to adjust the radiation dose during imaging. The grid is equipment used on the FPD 1 side to reduce scattered radiation generated in the captured image.

[0047] The radiography order icon C displayed in the radiography order display area 312c simply displays some of the radiography conditions. Specifically, the radiography order icon C displays the scan size, radiography body part, radiography type, etc. The examination screen 312 illustrated in Fig. 4 indicates that still image radiography, dynamic radiography, and dynamic radiography are performed in this order during the examination.

[0048] The console 3 may receive new imaging order information of the examination information through transmission from the RIS 40. The console 3 may also receive new imaging order information through the user U's operation of the operation unit 32. For example, the user U can add a new imaging order by clicking a blank space in the imaging order display area 312c. When the blank space in the imaging order display area 312c is clicked, a dialogue screen for inputting the imaging order is displayed. The user U can input the necessary information from the dialogue screen. As a result, an icon C of the new imaging order is displayed in the blank space in the imaging order display area 312c, as shown by the two-dot chain line in FIG. 5 .

[0049] The control unit 211 also displays some or all of the content displayed on the display unit 31 on the second display unit 29. The control unit 211 can also accept input from the user U via the touch panel of the second display unit 29. The same applies to all of the display content of the display unit 31 described below. The display unit 31 and the second display unit 29 function as presentation units.

[0050] [Basic Procedure for Radiation Image Capture] In radiation imaging using the radiation imaging system 100 configured as described above, the user U captures a radiation image as follows. First, the user U places the radiation imaging system 100 near the subject S, such as beside the bed B. Then, the user U has the subject S assume a supine position. Then, the user U adjusts the approximate position and orientation of the tube 23 so that the irradiation port of the housing of the tube 23 faces the region to be imaged on the subject S. Then, the user U removes the FPD 1 from the storage unit 26 and places the FPD 1 between the back of the subject S and the bed B. Then, the user U fine-tunes the orientation and irradiation field of the tube 23 so that the irradiation axis of the radiation R is perpendicular to the radiation entrance surface of the FPD 1. Then, the user U performs radiation imaging. That is, the user U causes the tube 23 to irradiate the region to be imaged on the subject S with radiation R. The FPD 1 then generates radiation image data of a still image or dynamic image showing the diagnostic target region.

[0051] [Synchronization Processing] When capturing the dynamic image described above, the control unit 211 controls the radiation generation device 2 to repeatedly irradiate radiation in pulses at a predetermined cycle. In response to this, the FPD 1 repeatedly generates radiographic images in synchronization with the radiation irradiation at the predetermined cycle. This allows the FPD 1 to generate radiographic image data of a dynamic image made up of a plurality of frame images. For this reason, it is necessary to synchronize the radiation irradiation timing by the radiation generation device 2 and the generation timing of the radiographic image by the FPD 1 with high precision.

[0052] The control unit 211 executes synchronization processing to set the radiation generation device 2 and the FPD 1 in a state where they can be synchronized, using a program stored in the storage unit 212. In this case, the control unit 211 functions as a synchronization processing unit.

[0053] A more detailed explanation will be given below. The control unit 211 is equipped with an oscillator. The oscillator can be configured with a crystal oscillator, a ceramic oscillator, or the like that generates a clock with a predetermined cycle. The control unit 211 generates a timing signal and time information using the clock generated by the oscillator. The timing signal is a pulse-like signal that is output each time one or more clocks are generated. The time information is a count value that counts up the timing signal.

[0054] In the synchronization process, the control unit 211 transmits a timing signal and time information to the FPD 1. This causes the FPD 1 to generate a copy signal with the same period as the timing signal. Furthermore, the FPD 1 counts up the copy signal taking the time information into account. This results in a synchronized state in which the control unit 211 and the FPD 1 count up the count value by the same value.

[0055] When capturing dynamic images, the control unit 211 may transmit information to the FPD 1 in advance that specifies a count value that indicates the timing of radiation irradiation by the radiation generation device 2. This allows the FPD 1 to generate radiographic images at appropriate timing. Therefore, the FPD 1 can capture good dynamic images.

[0056] 6 is a flowchart of the synchronization process performed by the control unit 211. The synchronization process is performed on the premise that an FPD 1 capable of capturing dynamic images is connected to the connector 261 of a communication-enabled slot. The control unit 211 and the FPD 1 are preferably connected by wire, with their connectors connected to each other, rather than wirelessly. This is because a wired connection allows the control unit 211 and the FPD 1 to achieve synchronization with high precision by reducing the effects of communication interruptions and noise. However, in a good wireless communication environment, the control unit 211 may perform the synchronization process with the FPD 1 by wireless communication.

[0057] The control unit 211 may start the synchronization process when the FPD 1 is connected to the communicable connector 261. Alternatively, the control unit 211 may start the synchronization process when a command is input by the user U via the operation unit 32.

[0058] The control unit 211 transmits a synchronization instruction to the FPD 1 (S1). Upon receiving the synchronization instruction, the FPD 1 returns a response signal to the control unit 211 (S101). Upon receiving the response signal, the control unit 211 initializes the count value of the time information (S2). The control unit 211 then transmits the time information and a timing signal to the FPD 1 (S3). The FPD 1 generates a copy signal of the received timing signal (S102). Furthermore, the FPD 1 counts up the count value of the received time information based on the copy signal (S103). As a result, synchronization on the FPD 1 side is completed, and the FPD 1 transmits a synchronization completion notification to the control unit 211 (S104). Upon receiving the synchronization completion notification from the FPD 1, the control unit 211 ends the synchronization process.

[0059] In the above synchronization process, it is difficult for the FPD 1 to generate a copy signal that is exactly the same as the received timing signal in terms of accuracy. Therefore, the count value of the time information on the FPD 1 side may become inaccurate as time passes. For this reason, the control unit 211 sets an expiration date for the synchronization process. The control unit 211 also transmits expiration date information to the FPD 1 during the synchronization process. The control unit 211 also registers the expiration date in the storage unit 212 along with the serial number of the FPD 1 that performed the synchronization process. The control unit 211 then monitors the arrival of the expiration date for the synchronization process for the FPD 1 whose expiration date has been registered.

[0060] After the synchronization process, the FPD 1 may display a synchronous state in which the synchronization process has been completed on a display unit that displays status information. The FPD 1 may also monitor the expiration date. In this case, the FPD 1 may switch the display of the synchronization status on the display unit to an asynchronous state when the expiration date arrives.

[0061] [Synchronization Status Presentation Process] The control unit 211 executes synchronization status presentation process to present information regarding the synchronization status of the FPD 1 using a predetermined program stored in the storage unit 212. In this case, the control unit 211 functions as a synchronization status presentation processing unit. The information regarding the synchronization status is information that indicates to the user U whether the target FPD 1 is in a synchronized state. Hereinafter, the "information regarding the synchronization status" will be referred to as "synchronization information." The control unit 211 presents the synchronization information by displaying it on the display unit 31 and the second display unit 29. The synchronization information may be displayed either directly or indirectly. A direct display is, for example, a display that clearly indicates that synchronization is in progress. An indirect display is, for example, a display that does not clearly indicate that synchronization is in progress but allows the user U to understand that synchronization is in progress.

[0062] The synchronization status presentation process is performed according to a plurality of patterns described below. The radiation imaging system 100 may be a system that performs the synchronization status presentation process according to only one of the plurality of patterns described below. Alternatively, the radiation imaging system 100 may be a system that performs the synchronization status presentation process according to a combination of two or more of the plurality of patterns.

[0063] [Synchronization Status Presentation Process (1)] The synchronization status presentation process (1) executed by the control unit 211 will be described. When the user U selects the FPD 1 to be used for imaging through the synchronization status presentation process (1), the control unit 211 presents synchronization information. The control unit 211 periodically and repeatedly executes the synchronization status presentation process (1).

[0064] 7 is a flowchart showing the synchronization status presentation process (1) performed by the control unit 211. The control unit 211 displays the examination screen 312 shown in FIG. 5 on the display unit 31 (S11). While the examination screen 312 is displayed, the user U can select an FPD 1 to be used for imaging from among the registered FPDs 1. The image display area 312a of the examination screen 312 displays icons F of the registered FPDs 1. Note that FIG. 5 illustrates an example in which only one icon F is displayed. However, if multiple FPDs 1 are registered in the storage unit 212, the icons F of all FPDs 1 are displayed in the image display area 312a.

[0065] With the examination screen 312 displayed, the control unit 211 determines whether or not the user U has selected an FPD 1 (S12). If no input has been received, the control unit 211 terminates the synchronization status presentation process (1). On the other hand, when the control unit 211 detects an FPD 1 selection input from the user U, it highlights the icon of the selected FPD 1. The two-dot chain line in FIG. 8 indicates the highlighting. The highlighting may be achieved by changing the color or brightness of the icon F, adding a border around the icon F, or the like. The control unit 211 then registers in the storage unit 212 that the selected FPD 1 will be used in the imaging order displayed on the examination screen 312 (S13).

[0066] The control unit 211 refers to the information about the selected FPD 1 that is recorded in the storage unit 212. Then, the control unit 211 determines whether the selected FPD 1 is in a synchronized state and whether that state continues (S14).

[0067] As a result, if the synchronized state of the selected FPD 1 continues, the control unit 211 causes the display unit 31 to display a positive screen G1 (S15). The positive screen G1 is a screen indicating that the FPD 1 is synchronized. As shown in FIG. 9, the positive screen G1 displays that imaging is possible for the dynamic image imaging order. This display corresponds to "presentation of information about the synchronization state." Furthermore, the control unit 211 may refer to the storage unit 212 and display information M1 on the positive screen G1, which indicates the time for which synchronization can be maintained, based on information about the expiration date of the synchronization state.

[0068] On the other hand, if the synchronized state of the selected FPD 1 is not maintained, the control unit 211 causes the display unit 31 to display a negative screen G2 (S16). The negative screen G2 is a screen indicating that the FPD 1 is not synchronized. As shown in Fig. 10, the negative screen G2 displays information indicating that synchronization is required using the slot connector 261. This display corresponds to "presentation of synchronization information."

[0069] Then, the control unit 211 goes through S15 or S16 and ends the synchronization status presentation process (1). The control unit 211 may end the display of the displayed positive screen G1 or negative screen G2 after a certain period of time has elapsed. Alternatively, the control unit 211 may display a confirmation button on the displayed positive screen G1 or negative screen G2. In this case, the control unit 211 may end the display of the screen after receiving input from the user U by pressing the confirmation button.

[0070] In some cases, the selected FPD 1 does not have the function of performing dynamic imaging. In such cases, the control unit 211 may display a screen indicating that the FPD 1 cannot perform dynamic imaging.

[0071] [Synchronization Status Presentation Process (2)] The following describes the synchronization status presentation process (2) executed by the control unit 211. The control unit 211 presents synchronization information when new photographing order information is acquired by addition or when photographing order information is selected by the user through the synchronization status presentation process (2). The control unit 211 periodically and repeatedly executes the synchronization status presentation process (2).

[0072] 11 is a flowchart showing the synchronization status presentation process (2) performed by the control unit 211. The control unit 211 determines whether or not examination information or radiography order information for the medical cart RC has been received from the RIS 40, which is an external device (S21). If examination information or radiography order information has not been received, the control unit 211 proceeds to S22. If examination information or radiography order information has been received, the control unit 211 proceeds to S23.

[0073] In S22, the control unit 211 determines whether or not the user U has input additional or selected imaging order information from the examination screen 312 (FIG. 5). If there is no such input, the control unit 211 ends the synchronization status presentation process (2). If there is such input, the control unit 211 proceeds to S23.

[0074] In S23, the control unit 211 refers to information recorded in the storage unit 212 regarding the FPD 1 capable of dynamic imaging that is registered in the storage unit 212. The control unit 211 then determines whether the registered FPD 1 is in a synchronized state and whether that state continues. As a result, if the synchronized state of the FPD 1 continues, the control unit 211 causes the display unit 31 to display a positive screen indicating that the FPD 1 is in a synchronized state (S24). This positive screen may be the same as the positive screen G1 in FIG. 9 described above. On the other hand, if the synchronized state of the FPD 1 does not continue, the control unit 211 causes the display unit 31 to display a negative screen (S25). This negative screen may be the same as the negative screen G2 in FIG. 10 described above.

[0075] If multiple FPDs 1 are registered in the storage unit 212, the control unit 211 may perform the determination in S23 for all FPDs 1 capable of capturing dynamic images. The control unit 211 may then display a positive screen if there is at least one FPD 1 that is continuously synchronized among the FPDs 1. The control unit 211 may also display a negative screen if there is no FPD 1 that is continuously synchronized among the FPDs 1.

[0076] Then, the control unit 211 goes through S24 or S25 and ends the synchronization status presentation process (2).

[0077] In the synchronization status presentation process (2), the display of the positive screen or negative screen is terminated in the same manner as in the synchronization status presentation process (1). Furthermore, there may be cases where none of the registered FPDs 1 have the function of performing dynamic imaging. In such cases, the control unit 211 may cause the display unit 31 to display a screen indicating that the FPD 1 cannot capture dynamic images.

[0078] [Synchronization Status Presentation Process (3)] The synchronization status presentation process (3) executed by the control unit 211 will be described. When the synchronization status of the FPD 1 changes due to the synchronization status presentation process (3), the control unit 211 presents synchronization information. The control unit 211 periodically and repeatedly executes the synchronization status presentation process (3).

[0079] The change in the synchronization state corresponds to a case where the synchronization state of the FPD 1 is released due to the expiration date. The change in the synchronization state may also include a transition from an asynchronous state to a synchronous state. Specifically, the control unit 211 requires a certain amount of time to elapse from the start to the completion of the synchronization process. The change in the synchronization state may also include the moment when the synchronization process is completed.

[0080] 12 is a flowchart showing the synchronization status presentation process (3) performed by the control unit 211. The control unit 211 references information about the FPD 1 registered in the storage unit 212. The control unit 211 then determines whether or not there is an FPD 1 for which the synchronization status is to be released (S31). In this case, the release of the synchronization status refers to the status immediately before the synchronization status is released. "Immediately before" may be, for example, one to several seconds before, or an even shorter time.

[0081] If there is no FPD 1 for which the synchronized state is to be released, the control unit 211 ends the synchronized state presentation process (3). If there is an FPD 1 for which the synchronized state is to be released, the control unit 211 causes the display unit 31 to display the negative screen of Fig. 10 (S32). The negative screen may be the negative screen G2 of Fig. 10. Then, the control unit 211 ends the synchronized state presentation process (3).

[0082] The display of the negative screen is terminated in the same manner as in the synchronization state presentation process (1).

[0083] Furthermore, if the change in the synchronization state includes a transition from an asynchronous state to a synchronous state, the following processing may be performed. The control unit 211 may monitor the FPD 1 during execution of the synchronization processing, and when the processing is completed, cause the display unit 31 to display a positive screen. The positive screen may be the positive screen G1 in FIG. 9 . In this case, the display of the positive screen is terminated in the same manner as in the synchronization state presentation processing (1).

[0084] [Synchronization Status Presentation Process (4)] The following describes the synchronization status presentation process (4) executed by the control unit 211. When the FPD 1 is stored in the storage unit 26 by the synchronization status presentation process (4), the control unit 211 presents synchronization information. The control unit 211 periodically and repeatedly executes the synchronization status presentation process (4).

[0085] Fig. 13 is an explanatory diagram showing the state in which the FPD 1 is stored in the storage unit 26. Fig. 14 is a flowchart showing the synchronization status presentation process (4) performed by the control unit 211. The control unit 211 detects the connection of the FPD 1 to a connector in one of the slots in the storage unit 26 (S41). The control unit 211 can detect the connection of the FPD 1 to one of the connectors through the power supply circuit 262 connected to each connector.

[0086] If the control unit 211 does not detect the connection of the FPD 1 to any of the connectors, it ends the synchronization status presentation process (4). If the control unit 211 detects the connection of the FPD 1 to any of the connectors, it refers to the information about the FPD 1 recorded in the storage unit 212. Then, the control unit 211 determines whether the connected FPD 1 is in a synchronized state and whether that state continues (S42).

[0087] If the synchronized state of the FPD 1 continues, the control unit 211 causes the display unit 31 to display a positive screen indicating the synchronized state (S43). This positive screen may be the same as the positive screen G1 in FIG. 9 described above. On the other hand, if the synchronized state of the FPD 1 does not continue, the control unit 211 causes the display unit 31 to display a negative screen G3 in FIG. 16 (S44). The negative screen G3 indicates that the FPD 1 is in an asynchronous state. The control unit 211 then ends the synchronization state presentation process (4).

[0088] The display of the affirmative screen or the negative screen G3 is terminated in the same manner as in the synchronization status presentation process (1). Furthermore, there are cases where the FPD 1 stored in the storage unit 26 does not have the function of performing dynamic imaging. In such cases, the control unit 211 may cause the display unit 31 to display a screen indicating that the FPD 1 cannot capture dynamic images.

[0089] [Synchronization Status Presentation Process (5)] The following describes the synchronization status presentation process (5) executed by the control unit 211. The control unit 211 performs the synchronization status presentation process (5) to present synchronization information when the FPD 1 is removed from the storage unit 26. The control unit 211 periodically and repeatedly executes the synchronization status presentation process (5).

[0090] Fig. 15 is an explanatory diagram showing the state in which the FPD 1 is being removed from the storage unit 26. Fig. 17 is a flowchart showing the synchronization status presentation process (5) performed by the control unit 211. The control unit 211 detects the removal of the FPD 1 from a connector in one of the slots in the storage unit 26 (S46). The control unit 211 can detect the removal of the FPD 1 from any of the connectors via the power supply circuit 262 connected to each connector.

[0091] If the controller 211 does not detect removal of the FPD 1 from any of the connectors, it ends the synchronization status presentation process (5). If the controller 211 detects removal of the FPD 1 from any of the connectors, it refers to the information about the removed FPD 1 stored in the storage unit 212. Then, the controller 211 determines whether the removed FPD 1 is in a synchronized state and whether that state continues (S47).

[0092] As a result, if the synchronized state of FPD 1 continues, the control unit 211 causes the display unit 31 to display a positive screen indicating that the synchronized state is in effect (S48). This positive screen may be the same as the positive screen G1 in Fig. 9 described above. On the other hand, if the synchronized state of FPD 1 does not continue, the control unit 211 causes the display unit 31 to display a negative screen G3 in Fig. 16 (S49). Then, the control unit 211 ends the synchronization state presentation process (5).

[0093] The display of the affirmative screen or the negative screen G3 is terminated in the same manner as in the synchronization status presentation process (1). Furthermore, there are cases where the FPD 1 removed from the storage unit 26 does not have the function of performing dynamic imaging. In such cases, the control unit 211 may cause the display unit 31 to display a screen indicating that the FPD 1 cannot capture dynamic images.

[0094] [Synchronization Status Presentation Process: Other] In the synchronization status presentation processes (1), (2), (4), and (5), the control unit 211 presents information about both the synchronized state and the asynchronous state of the FPD 1. From the perspective of drawing the attention of the user U, the presentation of the synchronized state is more important than the presentation of the asynchronous state. Therefore, in the synchronization status presentation processes (1), (2), (4), and (5), the control unit 211 may omit the presentation of the synchronization status.

[0095] Each screen presenting synchronization information in the synchronization status presentation processes (1) to (5) may include information identifying the FPD 1. For example, each screen may also display identifying information such as the type, model number, and serial number of the target FPD 1.

[0096] [Battery Remaining Amount Presentation Process] The control unit 211 executes a battery remaining amount presentation process that presents information about the remaining battery amount of the FPD 1 using a predetermined program stored in the storage unit 212. In this case, the control unit 211 functions as a battery remaining amount presentation processing unit. The information about the remaining battery amount is information that indicates to the user U whether the remaining battery amount of the target FPD 1 is appropriate for performing dynamic imaging. Hereinafter, "information about the remaining battery amount" will be referred to as "battery information." The control unit 211 presents the battery information by displaying the information on the display unit 31 and the second display unit 29. The display of the battery information may be either a direct display or an indirect display. A direct display is, for example, a display that clearly indicates the remaining battery amount itself or whether the remaining battery amount is sufficient. An indirect display is, for example, a display that allows the user U to understand whether dynamic imaging is possible based on the remaining battery amount.

[0097] The remaining battery capacity display process is performed according to a plurality of patterns described below. The radiation imaging system 100 may perform the remaining battery capacity display process in only one of the plurality of patterns described below. Alternatively, the radiation imaging system 100 may perform the remaining battery capacity display process in a combination of two or more of the plurality of patterns.

[0098] [Battery remaining capacity presentation process (1)] The following describes the battery remaining capacity presentation process (1) executed by the control unit 211. When the user U selects the FPD 1 to be used for imaging through the battery remaining capacity presentation process (1), the control unit 211 presents battery information. The control unit 211 periodically and repeatedly executes the battery remaining capacity presentation process (1).

[0099] 18 is a flowchart showing the remaining battery capacity presentation process (1) performed by the control unit 211. The control unit 211 displays the inspection screen 312 shown in FIG. 5 on the display unit 31 (S51).

[0100] With the examination screen 312 displayed, the control unit 211 determines whether or not the user U has selected and input the FPD 1 (S52). If no input has been received, the control unit 211 terminates the remaining battery level presentation process (1). On the other hand, if the control unit 211 detects the user U's selection and input of the FPD 1, it performs the following process. The control unit 211 registers in the storage unit 212 that the selected FPD 1 will be used in the radiography order displayed on the examination screen 312 (S53).

[0101] Next, the control unit 211 communicates with the selected FPD 1 to request the current remaining battery level (S54), and the control unit 211 obtains the current remaining battery level from the response of the FPD 1.

[0102] The control unit 211 determines whether the remaining battery power of the selected FPD 1 is equal to or greater than a predetermined value (S55). The predetermined value here refers to the remaining battery power required for dynamic imaging. This value may be set in advance. If the remaining battery power of the selected FPD 1 is equal to or greater than the predetermined value, the control unit 211 displays a positive screen on the display unit 31 (S56). The positive screen indicates that the remaining battery power is sufficient for dynamic imaging. This screen may be the same as the positive screen G1 shown in FIG. 9 . FIG. 9 indicates that the remaining battery power is sufficient for capturing dynamic images and therefore imaging is possible. This display corresponds to "information regarding the remaining battery power." The control unit 211 may also display the remaining battery power instead of the information M1 indicating the time for which synchronization can be maintained shown in FIG. 9 .

[0103] On the other hand, if the remaining battery charge value of the selected FPD 1 is less than the predetermined value, the control unit 211 causes the display unit 31 to display a negative screen G4 (S57). The negative screen G4 is a screen that clearly indicates that the remaining battery charge is insufficient for dynamic imaging. As shown in Figure 19, the negative screen G4 indicates that the FPD 1 needs to be charged via the connector 261 of one of the slots. This display corresponds to "information regarding the remaining battery charge."

[0104] Then, the control unit 211 goes through S56 or S57 and ends the remaining battery capacity presentation process (1). The control unit 211 may end the display of the displayed positive screen or negative screen G4 after a certain period of time has elapsed. Alternatively, the control unit 211 may display a confirmation button on the displayed positive screen or negative screen G4. In this case, the control unit 211 may end the display of the screen after receiving input from the confirmation button.

[0105] The control unit 211 may display the "information about the remaining battery capacity" in stages. For example, a recommended remaining battery capacity and a lower remaining battery capacity may be defined. The recommended remaining battery capacity is a value that is sufficient for dynamic radiography. The remaining battery capacity is a value at which dynamic radiography is possible. The control unit 211 may display a screen showing the recommended remaining battery capacity when the FPD 1 has a value less than the recommended remaining battery capacity but greater than or equal to the remaining battery capacity (see FIG. 22). Furthermore, the control unit 211 may display the remaining battery capacity when the FPD 1 has a value less than the remaining battery capacity (see FIG. 23). These screens may also include a display encouraging charging of the battery of the FPD 1.

[0106] The control unit 211 may perform the synchronization status presentation process (1) and the battery remaining capacity presentation process (1) in parallel. In this case, the control unit 211 may perform the displays based on each process at different times. The control unit 211 may also divide the display area into two and perform each display.

[0107] Furthermore, the control unit 211 may provide individual displays for all combinations of the determination results of each process. For example, the control unit 211 may provide the following displays: (i) A display that the FPD 1 is synchronized and the remaining battery power is sufficient. (ii) A display that the FPD 1 is synchronized but the remaining battery power is insufficient. (iii) A display that the FPD 1 is asynchronous and the remaining battery power is sufficient. (iv) A display that the FPD 1 is asynchronous and the remaining battery power is insufficient.

[0108] [Battery remaining capacity presentation process (2)] The following describes the battery remaining capacity presentation process (2) executed by the control unit 211. The control unit 211 presents battery information through the battery remaining capacity presentation process (2) when new imaging order information is acquired by addition or when imaging order information is selected by the user. The control unit 211 periodically and repeatedly executes the battery remaining capacity presentation process (2).

[0109] 20 is a flowchart showing the remaining battery level presentation process (2) performed by the control unit 211. The control unit 211 determines whether or not examination information or radiography order information for the medical cart RC has been received from the RIS 40 (S61). If examination information or radiography order information has not been received, the control unit 211 proceeds to S62. If examination information or radiography order information has been received, the control unit 211 proceeds to S63.

[0110] In S62, the control unit 211 determines whether or not the user U has added or selected imaging order information via the examination screen 312 (FIG. 5). If there has been no such input, the control unit 211 ends the remaining battery level presentation process (2). If there has been such input, the control unit 211 proceeds to S63.

[0111] In S63, the control unit 211 communicates with an FPD 1 capable of dynamic imaging that is registered in the storage unit 212, and requests the current remaining battery level. Then, the control unit 211 obtains the current remaining battery level from the response of the FPD 1.

[0112] The control unit 211 determines whether the remaining battery power of the selected FPD 1 is equal to or greater than the value that allows dynamic radiography (S64). If the remaining battery power of the selected FPD 1 is equal to or greater than the value that allows dynamic radiography, the control unit 211 displays a positive screen on the display unit 31 (S65). Note that this positive screen may be the positive screen G1 in Fig. 9, as in the case of the above-described battery power presentation process (1).

[0113] On the other hand, if the remaining battery power value of the selected FPD 1 is less than the value that allows dynamic radiography, the control unit 211 displays a negative screen on the display unit 31 (S66). The negative screen may be the same screen as the negative screen G4 in FIG. 19.

[0114] If multiple FPDs 1 are registered in the storage unit 212, the control unit 211 may perform the determination in S64 for all FPDs 1 capable of capturing dynamic images. The control unit 211 may then display a positive screen if there is at least one FPD 1 among the FPDs 1 whose remaining battery charge is equal to or greater than the value at which dynamic imaging is possible. Alternatively, the control unit 211 may display a negative screen if there is no FPD 1 among the FPDs 1 whose remaining battery charge is equal to or greater than the value at which dynamic imaging is possible.

[0115] Then, the control unit 211 goes through S65 or S66 and ends the remaining battery capacity presentation process (2).

[0116] In the battery remaining amount presentation process (2), the display of the positive screen or negative screen is terminated in the same manner as in the battery remaining amount presentation process (1). Also, in the battery remaining amount presentation process (2), the gradual display of the "information regarding the battery remaining amount" is the same as in the battery remaining amount presentation process (1).

[0117] The control unit 211 may perform the synchronization status presentation process (2) and the battery remaining capacity presentation process (2) in parallel. This case is the same as the case where the synchronization status presentation process (1) and the battery remaining capacity presentation process (1) are performed in parallel.

[0118] [Battery remaining capacity presentation process (3)] The following describes the battery remaining capacity presentation process (3) executed by the control unit 211. The control unit 211 presents battery information by the battery remaining capacity presentation process (3) when the remaining battery capacity of the FPD 1 falls below a predetermined threshold. The control unit 211 periodically and repeatedly executes the battery remaining capacity presentation process (3).

[0119] 21 is a flowchart showing the remaining battery capacity presentation process (3) performed by the control unit 211. The control unit 211 communicates with an FPD 1 capable of dynamic radiography registered in the storage unit 212 to request the current remaining battery capacity value (S71). If there are multiple FPDs 1 capable of dynamic radiography, the control unit 211 requests the current remaining battery capacity values ​​from all of those FPDs 1. The control unit 211 then obtains the current remaining battery capacity values ​​from the responses of the FPDs 1.

[0120] The control unit 211 compares the remaining battery capacity of the selected FPD 1 with a first threshold (S72). Here, the control unit 211 prepares two thresholds, a first threshold and a second threshold. The first threshold is greater than the second threshold. For example, the first threshold indicates a recommended remaining battery capacity that is sufficient to perform dynamic radiography. The second threshold indicates a feasible remaining battery capacity that allows dynamic radiography to be performed.

[0121] The control unit 211 ends the remaining battery level display process (3) if the remaining battery level of the FPD 1 is not less than the first threshold. The control unit 211 may also display on the display unit 31 that the remaining battery level of the FPD 1 is equal to or greater than the recommended remaining battery level.

[0122] If the remaining battery capacity of FPD1 is less than the first threshold, the control unit 211 compares the remaining battery capacity with the second threshold (S73).If the remaining battery capacity of FPD1 is not less than the second threshold, the control unit 211 displays the first screen G5 of Fig. 22 on the display unit 31 (S74).

[0123] If the remaining battery power of the FPD 1 is less than the second threshold, the second screen G6 of FIG. 23 is displayed on the display unit 31 (S75).

[0124] The first screen G5 is a screen indicating that the remaining battery power value of the FPD 1 is greater than the executable remaining battery power but less than the recommended remaining battery power. The second screen G6 is a screen indicating that the remaining battery power value of the FPD 1 is also less than the executable remaining battery power.

[0125] Then, the control unit 211 goes through S74 or S75 and ends the remaining battery capacity presentation process (3).

[0126] In the remaining battery capacity display process (3), the control unit 211 may set only one threshold value for the remaining battery capacity and make a determination. For example, the threshold value may be the second threshold value only. In this case, the control unit 211 omits step S72 in the remaining battery capacity display process (3). Furthermore, in step S73, the control unit 211 may end the process if it determines NO. Alternatively, in step S73, the control unit 211 may display on the display unit 31 that the FPD 1 has a remaining battery capacity equal to or greater than the executable capacity if it determines NO.

[0127] If there are a plurality of FPDs 1 capable of dynamic imaging, the control unit 211 may perform the remaining battery level display process (3) for the FPD 1 with the largest remaining battery level.

[0128] In the remaining battery capacity presentation process (3), the display of the first screen G5 or the second screen G6 is terminated in the same manner as in the remaining battery capacity presentation process (1).

[0129] [Battery remaining capacity presentation process (4)] The following describes the battery remaining capacity presentation process (4) executed by the control unit 211. When the FPD 1 is stored in the storage unit 26 by the battery remaining capacity presentation process (4) (see FIG. 13), the control unit 211 presents battery information. The control unit 211 periodically and repeatedly executes the battery remaining capacity presentation process (4).

[0130] 24 is a flowchart showing the remaining battery power presentation process (4) performed by the control unit 211. The control unit 211 detects the connection of the FPD 1 to a connector in one of the slots in the storage unit 26 (S81).

[0131] If the control unit 211 does not detect the connection of the FPD 1 to any of the connectors, it ends the remaining battery level presentation process (4). If the control unit 211 detects the connection of the FPD 1 to any of the connectors, it proceeds to S82.

[0132] In S82, the control unit 211 communicates with the connected FPD 1 to request the current remaining battery level. Then, the control unit 211 obtains the current remaining battery level from the response of the FPD 1.

[0133] The control unit 211 determines whether the remaining battery power of the connected FPD 1 is equal to or greater than the value that allows dynamic radiography (S83). If the remaining battery power of the connected FPD 1 is equal to or greater than the value that allows dynamic radiography, the control unit 211 displays a positive screen on the display unit 31 (S84). Note that this positive screen may be the positive screen G1 in Fig. 9, as in the case of the above-described battery power presentation process (1).

[0134] On the other hand, if the remaining battery capacity of the connected FPD 1 is less than the capacity required for dynamic radiography, the control unit 211 displays a negative screen on the display unit 31 (S85). Note that this negative screen may be the negative screen G4 in Fig. 19, as in the case of the above-described remaining battery capacity presentation process (1).

[0135] Then, the control unit 211 goes through S84 or S85 and ends the remaining battery capacity presentation process (4).

[0136] In the battery remaining amount presentation process (4), the display of the positive screen or negative screen is terminated in the same manner as in the battery remaining amount presentation process (1). Also, in the battery remaining amount presentation process (4), the gradual display of the "information regarding the battery remaining amount" is the same as in the battery remaining amount presentation process (1).

[0137] Furthermore, there may be cases where the FPD 1 stored in the storage unit 26 does not have the function of performing dynamic imaging. In such cases, the control unit 211 may cause the display unit 31 to display a screen indicating that the FPD 1 cannot perform dynamic image capture.

[0138] The control unit 211 may perform the synchronization status presentation process (4) and the battery remaining capacity presentation process (4) in parallel. This case is the same as the case where the synchronization status presentation process (1) and the battery remaining capacity presentation process (1) are performed in parallel.

[0139] [Battery remaining capacity presentation process (5)] The following describes the battery remaining capacity presentation process (5) executed by the control unit 211. When the FPD 1 is removed and taken out from the storage unit 26 (see FIG. 15 ), the control unit 211 presents battery information through the battery remaining capacity presentation process (5). The control unit 211 periodically and repeatedly executes the battery remaining capacity presentation process (5).

[0140] 25 is a flowchart showing the remaining battery power display process (5) performed by the control unit 211. The control unit 211 detects removal of the FPD 1 from the connector in one of the slots in the storage unit 26 (S91).

[0141] If the removal of the FPD 1 from any connector is not detected, the control unit 211 ends the remaining battery capacity presentation process (5). If the removal of the FPD 1 from any connector is detected, the control unit 211 proceeds to step S92.

[0142] In S92, the control unit 211 communicates with the removed FPD 1 to request the current remaining battery level. The control unit 211 then obtains the current remaining battery level from the response of the FPD 1.

[0143] The control unit 211 determines whether the remaining battery power of the removed FPD 1 is sufficient to perform dynamic radiography (S93). If the remaining battery power of the removed FPD 1 is sufficient to perform dynamic radiography, the control unit 211 displays a positive screen on the display unit 31 (S94). Note that this positive screen may be the positive screen G1 in Fig. 9, as in the case of the above-described battery power display process (1).

[0144] On the other hand, if the remaining battery capacity of the removed FPD 1 is less than the capacity required for dynamic radiography, the control unit 211 displays a negative screen on the display unit 31 (S95). Note that this negative screen may be the negative screen G4 in Fig. 19, as in the case of the above-described remaining battery capacity presentation process (1).

[0145] Then, the control unit 211 goes through S94 or S95 and ends the remaining battery capacity presentation process (5).

[0146] In the battery remaining capacity presentation process (5), the display of the positive screen or negative screen is terminated in the same manner as in the battery remaining capacity presentation process (1). Also, in the battery remaining capacity presentation process (5), the gradual display of the "information regarding the battery remaining capacity" is the same as in the battery remaining capacity presentation process (1).

[0147] Furthermore, there may be cases where the FPD 1 removed from the storage unit 26 does not have the function of performing dynamic imaging. In such cases, the control unit 211 may cause the display unit 31 to display a screen indicating that the FPD 1 cannot perform dynamic imaging.

[0148] The control unit 211 may perform the synchronization status presentation process (5) and the battery remaining capacity presentation process (5) in parallel. This case is the same as the case where the synchronization status presentation process (1) and the battery remaining capacity presentation process (1) are performed in parallel.

[0149] [Battery Remaining Amount Presentation Process: Other] In the battery remaining amount presentation processes (1), (2), (4), and (5), the control unit 211 presents information in two cases. The two cases here are when the remaining battery amount of the FPD 1 is sufficient for capturing dynamic images and when it is not sufficient. From the perspective of alerting the user U, of the two cases above, the case where the remaining battery amount is not sufficient for capturing dynamic images is more important. Therefore, in the battery remaining amount presentation processes (1), (2), (4), and (5), the control unit 211 may omit presenting information when the remaining battery amount of the FPD 1 is sufficient for capturing dynamic images.

[0150] Each screen that presents battery information in the remaining battery capacity presentation processes (1) to (5) may include information that identifies the FPD 1. For example, each screen may also display identifying information such as the type, model number, and serial number of the target FPD 1.

[0151] [Equipment Information Presentation Processing] The control unit 211 executes equipment information presentation processing that presents information about equipment required for capturing radiographic images using a predetermined program stored in the storage unit 212. In this case, the control unit 211 functions as an equipment information presentation processing unit. Examples of equipment required for capturing radiographic images include FPDs, grids, and additional filters. Examples of equipment are not limited to these. The equipment covers all equipment that may be required depending on the imaging conditions and the mode of imaging. In the following description, an example is given in which the equipment covers FPDs and grids. Information about equipment is information that indicates the equipment required for the target imaging. This information may include information that identifies the equipment in detail, such as the specifications, format, model, and type of the equipment. Hereinafter, "information about equipment" will be referred to as "equipment information."

[0152] The equipment information presentation process is performed according to a plurality of patterns described below. The radiation imaging system 100 may perform the equipment information presentation process in only one of the plurality of patterns described below. Alternatively, the radiation imaging system 100 may perform the equipment information presentation process in a combination of two or more of the plurality of patterns.

[0153] [Equipment Information Presentation Process (1)] The following describes the equipment information presentation process (1) executed by the control unit 211. When the user U selects the FPD 1 to be used for imaging through the equipment information presentation process (1), the control unit 211 presents equipment information. The control unit 211 periodically and repeatedly executes the equipment information presentation process (1).

[0154] 26 is a flowchart showing the equipment information presentation process (1) performed by the control unit 211. The control unit 211 displays the inspection screen 312 shown in FIG. 5 on the display unit 31 (S111).

[0155] With the examination screen 312 displayed, the control unit 211 determines whether or not the user U has selected an FPD 1 (S112). If no selection has been made, the control unit 211 terminates the equipment information presentation process (1). On the other hand, if the control unit 211 detects an FPD 1 selection input from the user U, it performs the following process. The control unit 211 registers in the storage unit 212 that the selected FPD 1 will be used in the radiography order displayed on the examination screen 312 (S113).

[0156] Next, the control unit 211 identifies the equipment information based on the radiography order information of the medical cart RC stored in the storage unit 212 (S114). The equipment information is the specifications, format, model, type, etc. of the FPD 1 and grid equipment necessary or appropriate for the radiography order.

[0157] It is preferable that the control unit 211 identifies the FPD 1 from among the FPDs 1 registered in the storage unit 212. However, the control unit 211 may identify an FPD 1 from outside the range of registered FPDs 1. Furthermore, when there are multiple pieces of radiography order information for the medical cart RC stored in the storage unit 212, the control unit 211 may identify the equipment information based on all of the radiography order information.

[0158] The control unit 211 causes the display unit 31 to display the equipment information presentation screen G7 shown in Fig. 27, which lists the identified equipment information (S115). Then, the control unit 211 ends the equipment information presentation process (1).

[0159] The control unit 211 may terminate the display of the displayed device information presentation screen G7 after a certain period of time has elapsed. Alternatively, the control unit 211 may display a confirmation button on the displayed device information presentation screen G7. In this case, the control unit 211 may terminate the display of the screen after receiving input from the confirmation button.

[0160] The control unit 211 may perform the device information presentation process (1), the synchronization status presentation process (1), or the battery remaining capacity presentation process (1) in parallel. In this case, the control unit 211 may stagger the timing of the displays based on each process. Furthermore, the control unit 211 may divide the display area and perform each display.

[0161] [Equipment Information Presentation Process (2)] The following describes the equipment information presentation process (2) executed by the control unit 211. The control unit 211 presents equipment information through the equipment information presentation process (2) when new photographing order information is acquired by addition or when photographing order information is selected by the user. The control unit 211 periodically and repeatedly executes the equipment information presentation process (2).

[0162] 28 is a flowchart showing the equipment information presentation process (2) performed by the control unit 211. The control unit 211 determines whether or not examination information or radiography order information for the medical cart RC has been received from the RIS 40, which is an external device (S121). If examination information or radiography order information has not been received, the control unit 211 proceeds to S122. If examination information or radiography order information has been received, the control unit 211 proceeds to S123.

[0163] In S122, the control unit 211 determines whether or not the user U has added or selected imaging order information through the examination screen 312 (FIG. 5). If there has been no such input, the control unit 211 ends the equipment information presentation process (2). If there has been such input, the control unit 211 proceeds to S123.

[0164] In S123, the control unit 211 identifies equipment information based on the radiography order information added in S121 or S122. The equipment information is the specifications, format, model, type, etc. of the FPD 1 and grid equipment necessary or appropriate for the radiography indicated by the radiography order information. In this case, too, it is preferable that the control unit 211 identifies the FPD 1 from among the FPDs 1 registered in the storage unit 212. However, the control unit 211 may identify an FPD 1 from outside the range of registered FPDs 1.

[0165] The control unit 211 causes the display unit 31 to display the equipment information presentation screen G7 shown in Fig. 27, which lists the identified equipment information (S124). Then, the control unit 211 ends the equipment information presentation process (2).

[0166] In the device information presentation process (2), the display of the device information presentation screen G7 is terminated in the same manner as in the device information presentation process (1). The control unit 211 may also perform the device information presentation process (2) in parallel with the synchronization status presentation process (2) or the battery remaining capacity presentation process (2). This case is the same as when the device information presentation process (1) in parallel with the synchronization status presentation process (1) or the battery remaining capacity presentation process (1) is performed.

[0167] [Equipment Information Presentation Process (3)] The following describes the equipment information presentation process (3) executed by the control unit 211. When the user U selects a photography order for photography through the equipment information presentation process (3), the control unit 211 presents equipment information. The control unit 211 periodically and repeatedly executes the equipment information presentation process (3).

[0168] 29 is a flowchart showing the equipment information presentation process (3) performed by the control unit 211. The control unit 211 displays the examination screen 312 shown in FIG. 5 on the display unit 31 (S131). The user U can select the imaging order to be executed by selecting the imaging order icon C displayed on the examination screen 312 using the operation unit 32.

[0169] With the examination screen 312 displayed, the control unit 211 determines whether or not the user U has selected and input an imaging order (S132). If no input has been made, the control unit 211 terminates the equipment information presentation process (3). On the other hand, if the control unit 211 detects a selection and input of an imaging order from the user U, the control unit 211 performs the following process. The control unit 211 registers in the storage unit 212 that the selected imaging order is the subject of imaging (S133).

[0170] Next, the control unit 211 identifies equipment information based on the radiography order selected by the user U (S134). The equipment information includes specifications, format, model, type, etc. of the FPD 1 and grid equipment necessary or appropriate for the radiography indicated by the radiography order information.

[0171] It is preferable that the control unit 211 specifies the FPD 1 from among the FPDs 1 registered in the storage unit 212. However, the control unit 211 may specify an FPD 1 from outside the range of registered FPDs 1.

[0172] The control unit 211 then causes the display unit 31 to display the equipment information presentation screen G7 shown in Fig. 27, which lists the identified equipment information (S135).Then, the control unit 211 ends the equipment information presentation process (3).

[0173] In the equipment information presentation process (3), the display of the equipment information presentation screen G7 is terminated in the same manner as in the equipment information presentation process (1).

[0174] [Equipment Information Presentation Process (4)] The following describes the equipment information presentation process (4) executed by the control unit 211. When the equipment information presentation process (4) detects a preparation operation for shooting, the control unit 211 presents equipment information. The control unit 211 periodically and repeatedly executes the equipment information presentation process (4).

[0175] Preparatory operations for photography include moving the medical examination cart RC and adjusting the position and orientation of the tube 23 in the tube support part 24. The movement of the medical examination cart RC can be detected by an acceleration sensor provided somewhere on the medical examination cart RC, a rotation sensor provided on the wheels 27, etc. The adjustment of the position and orientation of the tube 23 can be detected by an acceleration sensor provided near the tube 23 in the tube support part 24. Furthermore, the adjustment of the orientation can be detected by an acceleration sensor or rotation sensor provided on the joint mechanism of the tube support part 24. For the equipment information presentation process (4), the control unit 211 will illustrate an example in which equipment information is presented by moving the medical examination cart RC.

[0176] 30 is a flowchart showing the equipment information presentation process (4) performed by the control unit 211. The control unit 211 determines whether or not the medical examination cart RC has moved (S141). If no movement of the medical examination cart RC is detected, the control unit 211 ends the equipment information presentation process (4).

[0177] On the other hand, when the movement of the medical examination cart RC is detected, the control unit 211 identifies the equipment information based on the radiography order information of the medical examination cart RC stored in the storage unit 212 (S142). The equipment information is the specifications, model, type, etc. of the FPD 1 and grid equipment necessary or appropriate for the radiography indicated by the radiography order information.

[0178] It is preferable that the control unit 211 identifies the FPD 1 from among the FPDs 1 registered in the storage unit 212. However, the control unit 211 may identify an FPD 1 from outside the range of registered FPDs 1. Furthermore, when there are multiple pieces of radiography order information for the medical cart RC stored in the storage unit 212, the control unit 211 may identify the equipment information based on all of the radiography order information.

[0179] The control unit 211 causes the display unit 31 to display the equipment information presentation screen G7 shown in Fig. 27, which lists the identified equipment information (S143). Then, the control unit 211 ends the equipment information presentation process (4).

[0180] In the equipment information presentation process (4), the display of the equipment information presentation screen G7 is terminated in the same manner as in the equipment information presentation process (1).

[0181] [Setting the Execution of Presentation Processes] The control unit 211 can select whether to execute or not execute the various processes described above depending on the settings. The various processes refer to synchronization status presentation processes (1) to (5), remaining battery capacity presentation processes (1) to (5), and device information presentation processes (1) to (4). The above settings can be made by the user U operating the operation unit 32. In this case, the operation unit 32 functions as a setting input unit.

[0182] [Technical Effects of the Embodiments of the Invention] In the radiation imaging system 100, when the FPD 1 is stored in the storage unit 26, the control unit 211 causes the display unit 31 to present synchronization information for the FPD 1. If the synchronization information is presented when the FPD 1 is stored in the storage unit 26, the user U will pay attention to the synchronization information. This enables the system 100 to allow the user U to accurately recognize the synchronization information. Furthermore, the system 100 can reduce the chances of the user U making a mistake in capturing a dynamic image with an unsynchronized FPD 1.

[0183] In the radiation imaging system 100, when the FPD 1 is removed from the storage unit 26, the control unit 211 causes the display unit 31 to display synchronization information for the FPD 1. If the synchronization information is displayed when the FPD 1 is removed from the storage unit 26, the user U will pay attention to the synchronization information. This enables the system 100 to allow the user U to accurately recognize the synchronization information. Furthermore, the system 100 can reduce the chance of the user U making a mistake in capturing a dynamic image with an unsynchronized FPD 1.

[0184] In the radiation imaging system 100, when the FPD 1 to be used for imaging is selected, the control unit 211 causes the display unit 31 to present synchronization information for the FPD 1. If synchronization information is presented when the FPD 1 is selected, the user U will pay attention to the synchronization information. Furthermore, the user U often focuses his or her attention on the display unit 31 when selecting the FPD 1. This enables the system 100 to allow the user U to accurately recognize the synchronization information. Furthermore, the system 100 can reduce the chance of the user U capturing a dynamic image with an unsynchronized FPD 1.

[0185] In the radiation imaging system 100, the control unit 211 causes the display unit 31 to present synchronization information of the FPD 1 when radiography order information is acquired from an external device or when radiography order information is added. Alternatively, in the radiation imaging system 100, the control unit 211 causes the display unit 31 to present synchronization information of the FPD 1 when radiography order information is acquired, such as when radiography order information is selected by the user. If synchronization information is presented when radiography order information is acquired, the user U will pay attention to the synchronization information. Furthermore, the user U is often gazing at the display unit 31 when radiography order information is acquired. This allows the system 100 to accurately allow the user U to recognize the synchronization information. Furthermore, the system 100 can reduce the chance of the user U capturing a dynamic image with an unsynchronized FPD 1.

[0186] In the radiation imaging system 100, when the synchronization status of the FPD 1 changes, the control unit 211 displays synchronization information of the FPD 1 on the display unit 31. Changes in the synchronization status of the FPD 1 are important to the user U who is capturing dynamic images. This allows the system 100 to promptly and accurately make the user U aware of this important information from the moment it occurs. Furthermore, changes in the synchronization status that are not visible in the appearance of the FPD 1 are difficult for the user U to recognize. However, the system 100 allows the user U to accurately recognize changes in the synchronization status. Furthermore, the system 100 can reduce the chances of the user U capturing dynamic images with an unsynchronized FPD 1.

[0187] The control unit 211 causes the display unit 31 to display information M1 indicating the time period for which the FPD 1 can maintain the synchronized state. Therefore, the system 100 allows the user U to accurately recognize the time period for which the FPD 1 can maintain the synchronized state. Furthermore, the system 100 can reduce the chance that the user U will mistakenly attempt to capture a dynamic image with an FPD 1 whose synchronization time has expired.

[0188] The control unit 211 causes the display unit 31 to present battery information of the FPD 1 at a predetermined timing. Therefore, the system 100 can draw the user U's attention to the battery information, compared to when the battery information is constantly presented.

[0189] In the radiation imaging system 100, when the FPD 1 is stored in the storage unit 26, the control unit 211 causes the display unit 31 to display battery information for the FPD 1. If the battery information is displayed when the FPD 1 is stored in the storage unit 26, the user U will pay attention to the battery information. This enables the system 100 to allow the user U to accurately recognize the battery information. Furthermore, the system 100 can reduce the chance of the user U making a mistake in capturing a dynamic image with an FPD 1 that has a low battery.

[0190] In the radiation imaging system 100, when the FPD 1 is removed from the storage unit 26, the control unit 211 causes the display unit 31 to display battery information for the FPD 1. If the battery information is displayed when the FPD 1 is removed from the storage unit 26, the user U will pay attention to the battery information. This enables the system 100 to allow the user U to accurately recognize the battery information. Furthermore, the system 100 can reduce the chance of the user U making a mistake in capturing a dynamic image with an FPD 1 that has a low battery.

[0191] In the radiation imaging system 100, when the FPD 1 to be used for imaging is selected, the control unit 211 causes the display unit 31 to display battery information for the FPD 1. If battery information is displayed when the FPD 1 is selected, the user U will pay attention to the battery information. Furthermore, the user U often focuses his or her attention on the display unit 31 when selecting the FPD 1. This enables the system 100 to allow the user U to accurately recognize the battery information. Furthermore, the system 100 can reduce the chance of the user U making a mistake in capturing a dynamic image with an FPD 1 that has a low battery.

[0192] In the radiation imaging system 100, the control unit 211 causes the display unit 31 to present battery information of the FPD 1 when radiography order information is acquired from an external device or when radiography order information is added. Alternatively, the control unit 211 causes the display unit 31 to present battery information of the FPD 1 when radiography order information is acquired, such as when radiography order information is selected by the user. If battery information is presented when radiography order information is acquired, the user U will pay attention to the battery information. Furthermore, the user U often focuses his or her attention on the display unit 31 when radiography order information is acquired. This enables the system 100 to allow the user U to accurately recognize battery information. Furthermore, the system 100 can reduce the possibility of the user U making a mistake in capturing a dynamic image using an FPD 1 with a low battery.

[0193] In the radiation imaging system 100, when the remaining battery charge of the FPD 1 falls below a threshold, the control unit 211 causes the display unit 31 to display battery information for the FPD 1. A decrease in the remaining battery charge of the FPD 1 is an important matter for the user U who is capturing dynamic images. This allows the system 100 to promptly and accurately make the user U aware of this important matter from the moment it occurs. Furthermore, a decrease in the remaining battery charge, which is not visible from the outside of the FPD 1, is difficult for the user U to recognize. However, the system 100 allows the user U to accurately recognize changes in the remaining battery charge. Furthermore, the system 100 can reduce the chances of the user U capturing dynamic images with an FPD 1 that has insufficient battery power.

[0194] The control unit 211 causes the display unit 31 to present equipment information related to equipment required for shooting at a predetermined timing. Therefore, the system 100 can draw the user U's attention to the equipment information, compared to when equipment information is constantly presented.

[0195] In the radiation imaging system 100, when the FPD 1 to be used for imaging is selected, the control unit 211 causes the display unit 31 to present equipment information. If equipment information is presented when the FPD 1 is selected, the user U will pay attention to the equipment information. Furthermore, the user U often focuses his or her attention on the display unit 31 when selecting the FPD 1. This enables the system 100 to allow the user U to accurately recognize the equipment information. Furthermore, the FPD 1 to be used for imaging is often selected during the preparation stage for imaging using the FPD 1. This enables the system 100 to allow the user U to accurately prepare the equipment and smoothly prepare for imaging. Furthermore, the system 100 can reduce mistakes made by the user U, such as insufficient equipment or incorrect equipment selection, that prevent imaging using the FPD 1 from being performed.

[0196] In the radiation imaging system 100, when the user selects imaging order information, such as when imaging order information is acquired from an external device or when imaging order information is added, the control unit 211 causes the display unit 31 to present equipment information. If equipment information is presented when imaging order information is acquired, the user U will pay attention to the equipment information. Furthermore, the user U often focuses his or her attention on the display unit 31 when acquiring imaging order information. This allows the system 100 to accurately recognize the equipment information. Furthermore, upon acquiring an imaging order, the user U often begins preparations for imaging using the FPD 1. This allows the system 100 to enable the user U to accurately prepare equipment and smoothly prepare for imaging. Furthermore, the system 100 can reduce mistakes made by the user U, such as insufficient equipment or incorrect equipment selection, that prevent imaging using the FPD 1.

[0197] In the radiation imaging system 100, when an imaging order to be executed is selected, the control unit 211 causes the display unit 31 to present equipment information. If equipment information is presented when an imaging order is selected, the user U will pay attention to the equipment information. Furthermore, the user U often focuses his or her attention on the display unit 31 when selecting an imaging order. This enables the system 100 to allow the user U to accurately recognize the equipment information. Furthermore, once an imaging order is selected, the user U often begins preparations for imaging using the FPD 1. This enables the system 100 to allow the user U to accurately prepare equipment and smoothly prepare for imaging. Furthermore, the system 100 can reduce mistakes made by the user U, such as insufficient equipment or incorrect equipment selection, that prevent imaging using the FPD 1.

[0198] In the radiation imaging system 100, the control unit 211 causes the display unit 31 to present equipment information when a preparatory operation for imaging is detected. If equipment information is presented when a preparatory operation for imaging is detected, the user U will pay attention to the equipment information. This enables the system 100 to allow the user U to accurately recognize the equipment information. Furthermore, the system 100 can provide the equipment information to the user U who is preparing for imaging at the appropriate timing. This allows the user U to accurately prepare the equipment and smoothly prepare for imaging. Furthermore, the system 100 can reduce mistakes made by the user U, such as a lack of equipment or an incorrect selection of equipment, that prevent imaging using the FPD 1.

[0199] The radiation imaging system 100 includes a mobile radiological imaging cart RC as a mobile radiation irradiation device. This allows the system to move to various locations within the medical facility and capture radiation images. Furthermore, the control unit 211 can perform a synchronization status display process, a battery remaining capacity display process, and an equipment information display process. This allows the system 100 to provide accurate imaging support during radiation imaging that involves moving around during medical rounds.

[0200] In the radiation imaging system 100, the display units 31, 29 are arranged on the console 3, the frame of the tube 23, and the device main body 21. This allows the user U to receive various pieces of information at a position appropriate for the work. Furthermore, the system 100 presents various pieces of information using sound, light, or vibration, allowing the user U to perform imaging work without gazing at the display unit. This makes it possible for the system 100 to improve the user U's workability.

[0201] The radiation imaging system 100 has an operation unit 32 into which a setting for whether to execute or not execute presentation on the display unit 31 is input. This makes it possible to receive presentation of information suited to the environment in which the radiation imaging system 100 is used. Furthermore, since presentation of unnecessary information can be avoided, necessary information can be more accurately provided to the user U. Furthermore, in the imaging order display area (reference numeral 312c in FIG. 4), if there is no imaging order for dynamic imaging or if imaging has already been performed even if there is an imaging order for dynamic imaging, presentation of the synchronization status can be prevented, thereby avoiding presentation of unnecessary information.

[0202] [Others] The present invention has been described above based on the above embodiment, but the description in the above embodiment is a preferred example of the radiation imaging system according to the present invention, and the present invention is not limited to this.

[0203] Before capturing a radiographic image, the subject S is positioned. During positioning, an offset calibration image is captured using the FPD 1. The offset calibration image is an image obtained by capturing an image using the FPD 1 without irradiating the subject with radiation. Multiple offset calibration images are acquired and averaged. The offset calibration image obtained by this averaging is used for correction processes, such as noise removal, of the radiographic image irradiated with radiation. If the subject S moves and changes his / her posture after positioning, a good radiographic image cannot be captured. The control unit 211 may use the offset calibration image described above to determine whether the radiographic image obtained by capturing the image is appropriate. Specifically, the control unit 211 determines the change in posture after positioning based on fluctuations in the signal of the offset calibration image. If the change in posture is within a predetermined range, the control unit 211 displays the appropriateness of the radiographic image on the display unit 31. Furthermore, if the change in posture is greater than the predetermined range, the control unit 211 displays the poor capture of the radiographic image on the display unit 31. This allows the user U to determine whether radiation can be irradiated before the radiation irradiation. Furthermore, even after the start of irradiation, the user U can immediately determine whether the image is appropriate. Therefore, it becomes possible to immediately decide whether to retake the image. Alternatively, if it is determined that the offset calibration image is not appropriate after the start of irradiation, the user U can acquire the offset calibration image again after the radiation irradiation is completed.

[0204] Furthermore, the FPD 1 may be equipped with detection elements such as strain gauges and pressure sensors. In this case, the control unit 211 receives the detection results of the detection elements on the spot through the FPD 1 during imaging. The detection results of the detection elements indicate fluctuations in the pressure that the FPD 1 receives from the subject S. Therefore, the control unit 211 can determine changes in posture after positioning from the detection results of the detection elements. In this case, too, the control unit 211 can determine the changes in posture during imaging of a radiographic image and determine whether the radiographic image is appropriate.

[0205] The image data of the radiographic image captured by the FPD 1 may be transmitted to a registered portable terminal such as a tablet in advance. Alternatively, the console 3 may acquire the image data from the FPD 1 and transmit it to the portable terminal. This allows medical personnel such as doctors to easily and quickly check the image.

[0206] Furthermore, in the radiation imaging system 100, the control unit 211 displays a pre-imaging screen indicating that imaging will be performed on the display unit 31 or the second display unit 29 immediately before imaging is performed. The control unit 211 may display this pre-imaging screen on the display unit 31 or the second display unit 29 so that it is visually different between still image imaging and dynamic imaging. The visual difference is preferably a visually clear one, such as a difference in color or brightness, a difference in screen configuration, or flashing of only one screen. This allows the user U to clearly recognize whether still image imaging or dynamic imaging is being performed.

[0207] The control unit 211 may also cause the second display unit 29 to display the radiation display status. For example, the radiation display status indicates whether or not radiation is being irradiated. This allows the user U to check the radiation display status during imaging by looking at the second display unit 29 on the tube 23 side without looking at the console 3.

[0208] Furthermore, the control unit 211 may cause the audio output unit 33 to output sounds that are repeated at regular intervals during radiation irradiation during imaging. The user U can grasp the irradiation time by ear by counting the sounds output during radiation irradiation. Therefore, the user U can irradiate radiation for an appropriate time while focusing on an area to be monitored or observed during radiographic imaging.

[0209] In the radiation imaging system 100, a display unit may be provided in a location other than the display unit 31 and the second display unit 29. This display unit displays the same content as the display unit 31 or the second display unit 29. This display unit may be provided in the radiation imaging system 100 together with the display unit 31 and the second display unit 29 or in place of the display unit 31 and the second display unit 29. This display unit may be provided in any location other than the display unit 31 and the second display unit 29 of the device main body 21 of the medical cart RC. Furthermore, the display unit may be provided in the FPD 1.

[0210] Furthermore, in the various processes described above, the control unit 211 may present various pieces of information in a manner different from the display on the display unit 31 or the second display unit 29. The various processes described above refer to synchronization status presentation processes (1) to (5), remaining battery capacity presentation processes (1) to (5), and equipment information presentation processes (1) to (4). Other manners include sound, light, vibration, etc. In the case of sound, the audio output unit 33 is used. In the case of light, a lamp is newly provided in the radiation imaging system 100. In the case of vibration, a vibrator is newly provided in the radiation imaging system 100. When using sound, light, or vibration, the control unit 211 can present various pieces of information by changing the continuous repeated output, the number of repeated outputs, the period of the repeated output, etc. Furthermore, the control unit 211 may use a combination of multiple types of sound, multiple colors of light, etc.

[0211] In the radiation imaging system 100 described above, the radiation generation device 2 and the console 3 share the control unit 211, the storage unit 212, and the communication unit 214. However, this is not limited thereto, and the radiation generation device 2 and the console 3 may each have their own control unit, storage unit, and communication unit. In this case, only one of the control unit of the radiation generation device 2 and the control unit of the console 3 may execute the various processes described above. The various processes described above refer to the synchronization status presentation processes (1) to (5), the remaining battery level presentation processes (1) to (5), and the equipment information presentation processes (1) to (4). Alternatively, the control unit of the radiation generation device 2 and the control unit of the console 3 may separately share the responsibility for executing smaller units of processing included in the various processes described above.

[0212] The above-described radiography system 100 includes a medical examination cart RC, but is not limited to this. For example, the radiation generation device 2 and the console 3 may both be housed in a stationary or portable housing other than a medical examination cart. Furthermore, the radiation generation device 2 and the console 3 may be configured as separate entities rather than being integrated.

[0213] Furthermore, although the above embodiment mainly refers to dynamic imaging, the contents presented in the above embodiment can also be applied to other types of dynamic imaging (for example, fluoroscopic imaging, etc.).

[0214] Furthermore, the detailed configurations and operations of the components constituting the radiation imaging system 100 in the above embodiment can be modified as appropriate without departing from the spirit of the present invention.

[0215] The present invention has industrial applicability in a radiography system, an imaging support method for a radiography system, and a program.

[0216] REFERENCE SIGNS LIST 1 FPD (radiographic imaging device) 2 Radiation generation device (radiation irradiation device) 3 Console 21 Device body 211 Control unit 212 Memory unit 213 Generator 214 Communication unit 22 Irradiation instruction switch 23 Tube 24 Tube support unit 25 Collimator 26 Storage unit 27 Wheels 28 Optical imaging unit 31 Display unit 32 Operation unit (setting input unit) 33 Audio output unit 100 Radiation imaging system 261 Connector 262 Power supply circuit 311 Display screen 311a List 312 Examination screen B Bed C Icon F Icon G1 Positive screen G2 Negative screen G3 Negative screen G4 Negative screen G7 Equipment information presentation screen G7 Equipment information presentation screen ID Patient M1 Information N Communication network R Radiation RC Mobile radiotherapy cart (mobile radiation irradiation device) S Subject (subject) U User

Claims

1. A radiation imaging system comprising: a radiation imaging device which captures video in synchronization with a radiation irradiation device; a presentation unit which presents information relating to a synchronization state of the radiation imaging device with respect to the radiation irradiation device; and a control unit which controls the presentation unit, wherein the control unit determines the synchronization state of the radiation imaging device at least one of the following times: when the radiation imaging device is stored in a storage unit, when the radiation imaging device is removed from the storage unit, when the radiation imaging device which will capture video is selected, when the control unit acquires imaging order information from an external device, when imaging order information is added, or when imaging order information is selected by a user, and causes the presentation unit to present information relating to the synchronization state of the radiation imaging device.

2. A radiation imaging system according to claim 1, wherein the control unit causes the presentation unit to present information on the time during which the radiation image capturing device can maintain synchronization with the radiation irradiation device.

3. The radiation imaging system according to claim 1, wherein the control unit causes the presentation unit to present information relating to the remaining battery charge of the radiation imaging device at a predetermined timing.

4. The radiation imaging system of claim 3, wherein the control unit causes the presentation unit to present information regarding the remaining battery charge of the radiation imaging device at at least one of the following times: when the radiation imaging device is stored in the storage unit, when the radiation imaging device is removed from the storage unit, when the radiation imaging device to perform imaging is selected, when the control unit acquires imaging order information from an external device, when imaging order information is added, when imaging order information is selected by a user, or when the remaining battery charge of the radiation imaging device falls below a threshold value.

5. A radiation imaging system according to claim 1, wherein the control unit causes the presentation unit to present information relating to equipment required for imaging at a predetermined timing.

6. A radiation imaging system as described in claim 5, wherein the control unit causes the presentation unit to present information regarding equipment required for the imaging at at least one of the following times: when the radiation imaging device to perform the imaging is selected, when the control unit acquires imaging order information from an external device, when imaging order information is added, when imaging order information is selected by a user, or when a preparatory operation for imaging is detected.

7. A radiation imaging system according to any one of claims 1 to 6, comprising a mobile radiation irradiation device as the radiation irradiation device.

8. A radiation imaging system as described in claim 1, wherein the presentation unit is arranged on a console, a frame of a tube, a device body or the radiation image imaging device, and the presentation unit performs presentation by sound, light or vibration.

9. A radiation imaging system according to any one of claims 1 to 6, further comprising a setting input section for inputting a setting of whether to execute or not execute presentation by said presentation section.

10. An imaging support method for a radiation imaging system having a radiation imaging device that captures video in synchronization with a radiation irradiation device, a presentation unit that presents information regarding a synchronization state of the radiation imaging device with respect to the radiation irradiation device, and a control unit that controls the presentation unit, the imaging support method for a radiation imaging system determining the synchronization state of the radiation imaging device at at least one of the following times: when the radiation imaging device is stored in a storage unit, when the radiation imaging device is removed from the storage unit, when the radiation imaging device that will capture video is selected, when the control unit acquires imaging order information from an external device, when imaging order information is added, or when imaging order information is selected by a user, and causing the presentation unit to present information regarding the synchronization state of the radiation imaging device.

11. A program for causing a computer of a radiation imaging system having a radiation imaging device that captures video in synchronization with a radiation irradiation device, a presentation unit that presents information regarding the synchronization state of the radiation imaging device with respect to the radiation irradiation device, and a control unit that controls the presentation unit to realize a function of determining the synchronization state of the radiation imaging device at least one of the following times: when the radiation imaging device is stored in a storage unit, when the radiation imaging device is removed from the storage unit, when the radiation imaging device that will capture video is selected, when the control unit acquires imaging order information from an external device, when imaging order information is added, or when imaging order information is selected by a user, and causing the presentation unit to present information regarding the synchronization state of the radiation imaging device.