Mobile radiography system and method for limiting a mobile radiography system

Abstract

To provide a mobile radiation moving image capturing system device capable of reducing burdens on a subject and a medical employee.SOLUTION: A mobile radiographic imaging system according to an embodiment of a disclosure has: a radiation generation apparatus that emits radiation and can be set to a plurality of imaging modes including a first mode for performing fluoroscopic imaging and a second mode as a general imaging mode for acquiring a series of a plurality of frame images by irradiating a subject with the radiation; and a control device that restricts the use of the first mode outside a management area.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present disclosure relates to a mobile radiation imaging system and a method for restricting a mobile radiation imaging system.

Background Art

[0002] A fluoroscopic device has been proposed that continuously emits pulsed radiation to perform fluoroscopic imaging of a subject (for example, Patent Document 1). Fluoroscopic imaging involves a higher dose of radiation than general imaging.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0004] In a building that handles fluoroscopic devices such as a hospital, a room that is a management area (simply referred to as the "management area") is installed. According to Japanese laws and regulations, a fluoroscopic device must be used in a more strictly controlled area than a general imaging device and cannot be used in a general hospital ward. Therefore, when performing fluoroscopic imaging, the patient needs to move to an imaging room where the fluoroscopic device can be used. In the case of patients who have difficulty moving to the imaging room, such as critically ill patients or patients with infectious diseases, the physical burden on the patient is large. In addition, when moving critically ill patients or patients with infectious diseases, it is necessary to assist in the movement and construct an environment for infection control, which also increases the physical and time burdens on medical staff.

[0005] Therefore, the above problem could be solved if hospitals owned mobile motion imaging equipment capable of recording video even in general patient rooms. However, owning both a fluoroscopy system and a mobile motion imaging system would be a significant financial burden for hospitals, and it is particularly difficult for small hospitals and clinics to own both.

[0006] The purpose of this disclosure is to provide a mobile radiography system that can reduce the burden on patients and medical personnel. [Means for solving the problem]

[0007] The inventors of this invention believe that the above problem can be solved by providing a mobile radiography system having multiple shooting modes, including a shooting mode for fluoroscopy and a dynamic shooting mode, which is a general shooting mode that acquires a series of multiple frames of images by irradiating the subject with radiation. However, since fluoroscopy and general shooting can be used in different locations, it is necessary to use the appropriate method depending on the location. We have found a new problem: if fluoroscopy is mistakenly performed in an unsuitable location, there is a risk that patients and medical personnel may be exposed to unnecessary radiation.

[0008] A mobile radiography system in one embodiment of the present disclosure includes a radiation-emitting device that can be set to a plurality of imaging modes, including a first mode for fluoroscopy and a second mode which is a general imaging mode for acquiring a series of multiple frame images by irradiating a subject with radiation, and a control device that performs processing to restrict the use of the first mode outside of a controlled area. Furthermore, the process for restricting the use of the first mode does not restrict setting to the second mode. .

[0009] A method for restricting a mobile radiography system in one embodiment of the present disclosure is a mobile radiography system that can be set to multiple imaging modes, including a first mode for fluoroscopy and a second mode which is a general imaging mode for acquiring a series of multiple frame images by irradiating a subject with radiation, wherein the method involves restricting the use of the first mode outside of a controlled area. Furthermore, the process for restricting the use of the first mode does not restrict setting to the second mode. .

[0010] These comprehensive or specific embodiments may be implemented as systems, devices, methods, integrated circuits, computer programs, or recording media, or as any combination of systems, devices, methods, integrated circuits, computer programs, and recording media. [Effects of the Invention]

[0011] According to this disclosure, it is possible to provide a mobile radiography system that can reduce the burden on patients and medical personnel. [Brief explanation of the drawing]

[0012] [Figure 1] A diagram showing an example of a medical cart in use. [Figure 2] A diagram showing an example of a mobile medical unit during transport or when not in use. [Figure 3] Diagram showing the functional blocks of the main unit. [Figure 4] This diagram shows an example of a window that appears on the screen to notify the user that the current mode is perspective mode. [Figure 5] This diagram shows an example of a window that appears on the screen when the setting to dynamic shooting mode is complete. [Figure 6] This diagram shows an example of a window that appears on the screen when notifying the user that the dynamic shooting mode has not been set up. [Figure 7] This diagram shows an example of a window that appears on the screen when perspective mode is available. [Figure 8] This diagram shows an example of a confirmation window that appears when switching to perspective mode. [Figure 9] Flowchart of the process executed by the control circuit [Figure 10] Flowchart of the process performed by the control unit [Modes for carrying out the invention]

[0013] Hereinafter, embodiments of the present disclosure will be described in detail with appropriate reference to the drawings.

[0014] <1. Mobile Radiographic Imaging System> First, the schematic configuration of a mobile radiographic imaging system according to an embodiment of the present disclosure will be described. The mobile radiographic imaging system includes at least a radiation generator. The mobile radiographic imaging system may be, for example, a mobile examination vehicle 100. The mobile examination vehicle 100 may have an automatic driving function.

[0015] FIG. 1 is a diagram showing an example of the mobile examination vehicle 100 during use.

[0016] FIG. 2 is a diagram showing an example of the mobile examination vehicle 100 during movement or when not in use.

[0017] The mobile examination vehicle 100 includes a radiation generator 110, a radiation detector 120, an arm 130, and a main body 140. The mobile examination vehicle 100 can be set to at least a fluoroscopy mode as the first mode or a dynamic imaging mode as the second mode as the imaging mode of the radiation generator 110. When the imaging mode is set to the fluoroscopy mode, it can also be used as a fluoroscopy device, and when the imaging mode is set to the dynamic imaging mode, it can also be used as a dynamic imaging device. The radiation generator 110 may have three or more imaging modes.

[0018] The mobile examination vehicle 100 may be capable of communicating with a hospital information system (HIS), a radiology information system (RIS), an image analysis device, a picture archiving and communication system (PACS), other radiographic imaging devices, etc., which are not shown.

[0019] [Radiation Generator] The radiation generator 110 is mounted on the mobile medical unit 100 and includes a generator 111 and a collimator 112. The radiation generator 110 may also be a radiation generating unit.

[0020] The generator 111 is equipped with a tube. When a voltage is applied to the tube and current flows, radiation is emitted from the tube. A pulsed voltage may be applied to the tube, causing pulsed radiation, such as X-rays, to be emitted from the tube.

[0021] The generator 111's maximum radiation dose, i.e., the permissible radiation dose, is limited according to the imaging mode set on the mobile examination unit 100. In dynamic imaging mode, the radiation dose is limited by the limitations of a general radiography device. In fluoroscopy mode, there are no limitations as a general radiography device, so it can emit a larger radiation dose than in dynamic imaging mode. In fluoroscopy mode, the radiation dose does not need to be limited. The generator 111 also emits radiation based on the settings from the input unit. Imaging conditions include, for example, conditions related to the subject 150 such as the imaging area, imaging direction, and body size, and conditions related to radiation emission such as tube voltage, tube current, radiation time, current-time product (mAs value), frame rate, permissible number of frames, pulse width, pulse interval, pulse period, and pulse duty cycle.

[0022] In dynamic imaging mode, the radiation generator 110 emits radiation repeatedly at a frequency of multiple times per unit time (for example, 15 times per second) while a radiation instruction is given, for a predetermined time (duration). Here, the pulse period and duration are set in advance by the input / output unit 141. The pulse interval, pulse width, and pulse duty cycle may also be set in advance by the input / output unit 141. In this embodiment, the dynamic imaging mode is described using a configuration that emits radiation pulses as an example, but a configuration that emits radiation continuously may also be used. In dynamic imaging mode, radiation emission is limited due to the limitations of a general imaging device.

[0023] In fluoroscopy mode, the radiation generator 110 repeats radiation pulses multiple times per unit time (for example, 6, 10, or 15 times per second) while radiation instruction is given. Here, the pulse period is set in advance by the input / output unit 141. In fluoroscopy mode, the duration is not set. In other words, in fluoroscopy mode, there is no limitation on radiation emission by duration. Also, in fluoroscopy mode, there are no limitations as a general radiography device, so more radiation can be emitted than in dynamic radiography mode. In fluoroscopy mode, the radiation dose does not need to be limited. The pulse interval, pulse width, and pulse duty cycle may be set in advance by the input / output unit 141. In this embodiment, the fluoroscopy mode is described using a configuration that emits radiation pulses as an example, but a configuration that emits radiation continuously may also be used.

[0024] The collimator 112 narrows the field of irradiation of the emitted radiation. The collimator 112 may have shielding means such as a filter. The shielding means may narrow the area irradiated by the emitted radiation. The shielding means may also reduce the intensity of the emitted radiation.

[0025] [Radiation detection device] The radiation detection device 120 has a communication unit 121. Although not shown in the figures, it also includes a sensor board, a scanning circuit, a reading circuit, and a control unit. The radiation detection device 120 may also be a radiation detection unit.

[0026] The radiation detection device 120 detects radiation emitted from the radiation generator 110 through the subject 150. The subject 150 is, for example, a human or an animal.

[0027] The sensor substrate has pixels arranged in a two-dimensional (matrix) configuration. Each pixel is equipped with a radiation detection element that generates an electric charge corresponding to the dose of radiation received through the subject, and a switch element that stores and releases the charge. The scanning circuit sets each switch element to be on or off. The reading circuit reads out the amount of charge emitted from each pixel as a signal value (intensity). The control unit controls the entire radiation detection device 120. The control unit generates a radiation image from the multiple signal values ​​read by the reading circuit. The communication unit 121 transmits the radiation image data and various signals generated by the reading circuit to the outside. The communication unit 121 also receives various information and signals. The communication unit 121 may perform wireless communication or wired communication.

[0028] In the radiation detection device 120 configured in this way, when the radiation detection element receives radiation with the scanning circuit switched off, the radiation detection element generates and accumulates a charge corresponding to the dose of radiation. When the scanning circuit switches on, the accumulated charge is released, and the readout circuit detects the amount of charge released from each pixel and generates a signal value indicating the amount of charge. The control unit generates a radiation image based on the signal value generated for each pixel. In the case of motion imaging, each generated radiation image is a single still image. In the case of pulsed radiation, one still image is generated corresponding to each pulse.

[0029] The communication unit 121 communicates with the communication unit 144 of the main unit 140 and transmits the generated radiation image to the communication unit 144 of the main unit 140. The communication unit 121 may transmit to the main unit 140 each time a still image is generated, or it may transmit multiple still images together to the communication unit 144 of the main unit 140. The communication unit 121 may also communicate with entities other than the main unit 140. The communication performed by the communication unit 121 may be wireless or wired communication.

[0030] When the radiation generator 110 performs pulsed radiation, the timing of generating the multiple still images that make up the dynamic image is synchronized with the timing of radiation emission from the radiation generator 110. On the other hand, when the radiation generator 110 performs continuous radiation, the generation of the multiple still images that make up the dynamic image is performed at any timing during the continuous radiation period.

[0031] The radiation detection device 120 may be stored in a compartment provided in the main unit 140 when the mobile medical unit 100 is in motion or when not in use. When the radiation detection device 120 is stored in the compartment of the main unit 140, the radiation detection device 120 may be connected to the main unit 140 by a wire, and charging and communication between the main unit 140 and the radiation detection device 120 may be performed from the main unit 140. When the radiation detection device 120 is stored in the compartment of the main unit 140, the software or firmware of the radiation detection device 120 may be updated by communication with the main unit 140. Charging of the radiation detection device 120 and communication with the main unit 140 may be performed wirelessly.

[0032] The radiation detection device 120 may be wirelessly connected when in use. The radiation detection device 120 may be powered by an internal battery. The radiation detection device 120 may be powered by a wired or wireless connection from the main unit 140.

[0033] The radiation detection device 120 may be connected to the main unit 140 by wire when being moved or not in use, and may be connected to the main unit 140 by wireless connection when in use.

[0034] [arm] The arm 130 comprises a vertical arm 131 and a horizontal arm 132. The vertical arm 131 rotatably supports the horizontal arm 132, i.e., so that it can rotate around the Z-axis. The vertical arm 131 may also movably support the horizontal arm 132. The horizontal arm 132 rotatably supports the radiation generator 110, i.e., so that it can rotate around the X-axis and Y-axis. The radiation generator 110 can be oriented in any direction relative to the main body 140 by the vertical arm 131 and the horizontal arm 132. The position and orientation of the arms may be determined by input from the input / output unit 141. The vertical arm 131 and the horizontal arm 132 may be rotatable and movable by control from the main body 140, or they may be rotatable and movable manually.

[0035] [Main body] The main unit 140 comprises an input / output unit 141, a power supply unit 142, a communication unit 144, and wheels 145. The main unit 140 may also include a handle 143. The main unit 140 may also include a housing for a radiation detection device 120, although this is not shown in the figures. Communication between the communication unit 144 of the main unit 140 and the communication unit 121 of the radiation detection device 120 may be wireless or wired.

[0036] The main body 140 may have a fixing means for locking its movement, although this is not shown. By releasing the fixing means, the main body 140 can be moved. For example, the fixing means may be a means for fixing the wheels 145, or a means for fixing the mobile examination cart 100 to a wire fixed to a wall constituting the controlled area.

[0037] The input / output unit 141 can have a variable tilt angle relative to the main unit 140. The input / output unit 141 may be separable from the main unit 140. If the input / output unit 141 is separated from the main unit 140, the input / output unit 141 and the main unit 140 are connected wirelessly or by wire.

[0038] The input / output unit 141 consists of an input means and an output means. The input and output units of the input / output unit 141 may be separate. The input / output unit 141 may consist of a touch panel, keyboard, mouse, microphone, camera, display, speaker, indicator light, etc. Input means such as voice input, gesture input, eye gaze input, and brainwave input may be available for the input / output unit 141. The input / output unit 141 configures the radiation generator 110. The input / output unit 141 can also input an operation to instruct the radiation generator 110 to emit radiation. The input / output unit 141 may configure the radiation instruction switch as a toggle button radiation button and output a radiation instruction for the period from the first time the toggle button is pressed to the second time it is pressed, or it may output a radiation instruction for the period while the radiation button is pressed.

[0039] By operating the input / output unit 141, the generator 111 emits radiation of a dose set by the input / output unit 141. The radiation is, for example, X-rays.

[0040] The input section receives various parameters emitted by the radiation generator 110. The input section may also receive mode settings. If the mobile medical unit 100 is set to dynamic imaging mode by the control means, the input section may be prohibited from receiving settings that exceed the radiation dose permissible in dynamic imaging mode.

[0041] The output unit provides notifications regarding mode settings. The output unit may also provide notifications prompting the user to switch from fluoroscopy mode to dynamic imaging mode. The output unit may also provide notifications regarding the current mode of the mobile ward ward 100. The output unit may also provide notifications indicating that the user has switched from fluoroscopy mode to dynamic imaging mode. The output unit may also issue alarms. Details regarding notifications will be described later.

[0042] The power supply unit 142 supplies power to the entire main unit 140. The power supply unit 142 may also charge the radiation detection device 120. The power supply unit 142 may be composed of a rechargeable battery. The power supply unit 142 may be connected to a commercial power source or the like for charging. It may have a function to detect when charging has started. The power supply unit 142 may be, for example, a nickel-metal hydride battery, a lithium-ion battery, a sodium battery, a solid-state battery, a flywheel, etc. The power supply unit 142 may be composed of a fuel cell or a nuclear battery. The fuel cell may be refillable.

[0043] The power supply unit 142 may be connected to a commercial power source or the like for charging when not in use, and disconnected from the commercial power source and powered by a battery when in use. The fuel cell fuel may be replenished when the power supply unit 142 is not in use.

[0044] The handle 143 is held by a person when moving the mobile medical cart 100. A sensor built into the handle 143 may detect that it is being held by a person. When the sensor detects that it is being held by a person, it may notify the control circuit 330.

[0045] The communication unit 144 communicates with the communication unit 121 of the radiation detection device 120. The communication unit 144 transmits the settings and instructions set by the input / output unit 141 to the communication unit 121 of the radiation detection device 120. The communication unit 144 also outputs the radiation image received from the communication unit 121 of the radiation detection device 120 to the input / output unit 141.

[0046] The wheels 145 rotate when the medical cart 100 is moved. The wheels 145 may be rotated (driven) by power supplied from the power supply unit 142, or they may be rotated by a person pushing the medical cart 100 with the handle 143. The wheels 145 are also fixed by fixing means (not shown).

[0047] [Function Block] Figure 3 shows the functional blocks of the main unit 140. The main unit 140 comprises an input unit 310, an output unit 320, a power supply unit 142, a handle 143, a communication unit 144, and a control circuit 330. The input unit 310 and the output unit 320 constitute the input / output unit 141. The input unit 310 and the output unit 320 may be integrated into a single unit.

[0048] The input unit 310 is comprised of input devices such as a touch panel, buttons, or a microphone. When the input unit 310 is instructed to start shooting, it may notify the control circuit 330 that it has been instructed to start shooting.

[0049] The output unit 320 is composed of output devices such as a display or speaker. The control circuit 330 controls the output unit 320 to display notifications regarding mode settings, or to output audio regarding mode settings.

[0050] The power supply unit 142 may notify the control circuit 330 when it detects that charging has started, that the battery has started supplying power, that it has been connected to a commercial power source, or that it has been disconnected from a commercial power source.

[0051] The handle 143 may notify the control circuit 330 when its built-in sensor detects that it is being held by a person.

[0052] The control circuit 330 controls the entire mobile medical unit 100. The control circuit 330 may be instructed by the input unit 310 to start imaging. The control circuit 330 may be notified by the power supply unit 142 that charging has started, the battery has started supplying power, it has been connected to commercial power, or it has been disconnected from commercial power. The control circuit 330 may be notified by a sensor built into the handle 143 that it is being held by a person. The control circuit 330 may be notified that the fixing means has been released, information has been acquired from the RIS, the communication method has been set to wireless, movement has been detected, a predetermined distance has been moved, a predetermined time has elapsed since the start of movement, or the fixing means has been locked.

[0053] The control circuit 330 consists of a computer such as a CPU (Central Processing Unit), ASIC (Application Specific Integrated Circuit), and FPGA (Field Programmable Gate Array). The control circuit 330 manages and sets the modes of the mobile examination vehicle 100. The control circuit 330 can select and switch between at least a fluoroscopy mode used as a fluoroscopy device or a general radiography mode used as a general radiography device. The control circuit 330 may select the imaging mode from three or more modes, including other modes. Hereinafter, the mode used as a general radiography device will be referred to as the general radiography mode. The general radiography mode may also be a dynamic radiography mode used as a dynamic radiography device. The radiation dose permitted in the dynamic radiography mode is less than the radiation dose permitted in the fluoroscopy mode. The control circuit 330 may rotate and move the vertical arm 131 and the horizontal arm 132.

[0054] The control circuit 330 restricts use outside the controlled area when the current mode is the transparency mode.

[0055] Restricting use outside the controlled area can be done through so-called "soft measures," such as notifying or alerting users, including radiologists, who handle the mobile warding unit 100, to limit its use, or through so-called "hard measures," such as preventing high-dose radiation (radiation doses exceeding the permissible radiation dose outside the controlled area) from being emitted from the mobile warding unit 100 outside the controlled area, or preventing the mobile warding unit 100 from leaving the controlled area. At least one of the soft measures and / or hard measures must be implemented, or both may be implemented.

[0056] In terms of hardware capabilities, the control circuit 330 can perform at least one of the following: control over the building and control over the mobile medical unit 100.

[0057] Furthermore, the restrictions on use may be implemented by the building or by the mobile medical unit 100. It is sufficient for at least one of the building and the mobile medical unit 100 to implement the restrictions, or both may implement them.

[0058] As a control measure implemented by the building, the doors to the controlled area may be locked to prevent the mobile medical unit 100 from leaving the controlled area.

[0059] As a control measure implemented by the mobile medical unit 100, it may be prevented from leaving the controlled area while it is capable of irradiating with a radiation dose exceeding the permissible dose, or outside the controlled area, the radiation generator 110 may be controlled to prevent irradiation with a radiation dose exceeding the permissible dose.

[0060] Figure 10 shows a flowchart of the process performed by the control device. For example, the control device may be the control circuit 330 of the mobile medical unit 100. The location of the control device can be anywhere. The flowchart may be executed at predetermined intervals (for example, every regular time), when some operation is performed on the mobile medical unit 100, or at predetermined intervals and when some operation is performed. By executing the flowchart shown in Figure 10, the mobile medical unit 100 can prevent the emission of radiation exceeding the permissible radiation dose outside the controlled area.

[0061] The control circuit 330 determines whether the imaging mode set on the mobile medical unit 100 is fluoroscopy mode or not (step S1001).

[0062] If the mobile medical unit 100 is not in fluoroscopy mode (for example, dynamic imaging mode) (step S1001, No), the control circuit 330 returns to step S1001 and determines the mode of the mobile medical unit 100. The control circuit 330 can similarly determine imaging modes other than fluoroscopy mode that can only be emitted within the controlled area.

[0063] The control circuit 330 determines whether the radiation generator 110 (mobile medical unit 100) is located within the controlled area if the mobile medical unit 100 is in fluoroscopy mode (step S1001, Yes) (step S1002).

[0064] If the mobile medical unit 100 is located within the controlled area (step S1002, Yes), the control circuit 330 executes a process to prevent it from leaving the controlled area (step S1003). It may also execute a process to prompt the user not to leave the controlled area. Details will be described later.

[0065] The control circuit 330 limits the amount of radiation emitted by the radiation generator 110 (mobile medical vehicle 100) if the mobile medical vehicle 100 is outside the controlled area (step S1002, No) (step S1004). For example, the control circuit 330 may make it impossible for the radiation generator 110 to emit a radiation dose exceeding the permissible dose. It may also perform a process to prompt the user to limit the amount of radiation emitted by the radiation generator 110. Details of this will be described later.

[0066] The control circuit 330 may execute the process in step S1004 if it determines that the mobile medical unit 100 has started moving, even if the mobile medical unit 100 is already within the controlled area. If the mobile medical unit 100 has started moving within the controlled area, the control circuit 330 may execute both the processes in steps S1003 and S1004. After executing the process in step S1003 or step S1004, the process returns to step S1001.

[0067] As control over the mobile medical unit 100, for example, at least one of the following (1)-(8) may be performed. (1) If set to fluoroscopy mode, lock (prevent movement of) the mobile medical unit 100. (2) Outside the controlled area, shut down (turn off the power to) the mobile medical unit 100. (3) Outside the controlled area, the power supply to the mobile medical unit 100 will be cut off. (4) Outside the controlled area, the power supply to the radiation generator 110 is shut off. (5) Outside the controlled area, switch the mode of the mobile medical unit 100 to dynamic imaging mode. (6) Outside the controlled area, the fluoroscopy mode of the mobile medical unit 100 shall not be used. (7) The radiation dose emitted by the mobile medical unit 100 shall be limited to an output range that is within the output range of the area where the mobile medical unit 100 is located. For example, radiation exceeding the upper limit (permissible radiation dose) shall not be emitted from the radiation generator 110 outside the controlled area. For example, the irradiation time in fluoroscopy mode may be limited. (8) The fluoroscopy mode cannot be set outside the controlled area. For example, the fluoroscopy mode is grayed out on the settings screen of the mobile medical unit 100.

[0068] As a software-based solution, the control circuit 330 may cause the output unit 320 to notify the current mode (i.e., the mobile medical unit 100 outputs an alarm), or it may cause the building to output an alarm. The alarm may consist of at least one of the following: notification of the current mode, and notification that the area is outside the controlled area.

[0069] In the case of dynamic shooting mode, the control circuit 330 may cause the output unit 320 to issue an alarm if the shooting conditions preset by the input unit 310 are not acceptable for a general-purpose imaging device.

[0070] [Determining the position of the medical van] Whether the mobile medical unit 100 is located inside or outside the controlled area can be determined by the mobile medical unit 100 itself, or by a control device that controls the building (for example, the door to the controlled area) (hereinafter referred to as the "building control device"). For example, the building control device may be installed in the building, or the control circuit 330 of the mobile medical unit 100 may be the building control device.

[0071] The mobile medical unit 100 may be equipped with a GPS (Global Positioning System) or other GNSS (Global Navigation Satellite System) to determine whether it is located within or outside the controlled area.

[0072] The communication unit 144 of the mobile medical unit 100 and a communication device installed in the building where the controlled area is located (hereinafter referred to as the "building communication device") may communicate to determine whether the mobile medical unit 100 is located within or outside the controlled area.

[0073] For example, the mobile medical unit 100 may determine that it is located within the controlled area by receiving a signal (e.g., a beacon signal) transmitted from a building communication device installed within the controlled area, or it may determine that it is located outside the controlled area by receiving a signal (e.g., a beacon signal) transmitted from a building communication device installed outside the controlled area. Alternatively, different beacon signals may be transmitted from both inside and outside the controlled area, and the mobile medical unit 100 may determine whether it is located inside or outside the controlled area based on which beacon signal it receives.

[0074] For example, when a signal (e.g., a beacon signal) transmitted from the mobile medical unit 100 is received by building communication devices installed in various locations within the building, the building communication device can recognize that the mobile medical unit 100 is present at the location where the building communication device is installed. As a result, the building control device can determine whether the mobile medical unit 100 is located within or outside the controlled area.

[0075] Sensors such as cameras mounted on the mobile medical unit 100 may be used to determine whether the mobile medical unit 100 is located within or outside the controlled area.

[0076] The building control system may use sensors such as cameras installed in the building to determine whether the mobile medical unit 100 is located within or outside the controlled area.

[0077] If the mobile medical unit 100 determines whether it is located within or outside the controlled area, it may notify the building control device. If the building control device determines whether the mobile medical unit 100 is located within or outside the controlled area, it may notify the mobile medical unit 100. By communication between the building control device and the control circuit 330 of the mobile medical unit 100, either control device can control the building (e.g., locking doors) and / or the mobile medical unit 100. Alternatively, another control device (e.g., a central control device) may control the building (e.g., locking doors) and / or the mobile medical unit 100 by communicating with the control circuit 330 of the mobile medical unit 100 and / or the building control device. In other words, the control devices can be located anywhere.

[0078] [Operation 1] First, we will explain the operation when the control circuit 330 causes the output unit 320 to notify it about the current mode.

[0079] The radiation generator 110 generates radiation when the shooting conditions are set by the input unit 310 and the set shooting conditions are applied to the generator 111 under the control of the input unit 310.

[0080] In dynamic imaging mode, the input / output unit 141 sets the imaging conditions such that pulsed radiation is emitted multiple times per predetermined time (for example, 15 times per second) for each instruction from the input / output unit 141, until the duration is reached.

[0081] If the radiation generator 110 cannot repeat pulsed radiation emission multiple times per predetermined time, it may emit radiation continuously for a predetermined time. In this disclosure, "emitting radiation for a predetermined time" includes both pulsed radiation, which involves repeating pulsed radiation emission multiple times over a predetermined time, and continuous radiation, which involves emitting radiation continuously for a predetermined time. The duration is, for example, 15 seconds. In motion imaging mode, if radiation is instructed by the radiation instruction switch, radiation is emitted with the duration as the maximum radiation time. In other words, in motion imaging mode, radiation is emitted within the duration and when the radiation instruction switch is operated.

[0082] The radiation intensity in motion imaging mode may be lower than the radiation intensity in fluoroscopy mode.

[0083] In dynamic imaging mode, the amount of radiation emitted in a single pulse can be less than the amount of radiation emitted when taking a still image, so the total amount of radiation irradiated to the patient can be about the same as when taking a still image of the chest. However, in the case of continuous radiation emission, it is desirable to set imaging conditions that do not significantly increase the patient's exposure.

[0084] In fluoroscopy mode, the radiation generator 110, based on the control circuit 330, sets the imaging conditions so that pulsed radiation is emitted multiple times per predetermined time (for example, 15 times per second) based on the operation of the emission button, via the input unit 310. In fluoroscopy mode, the duration does not need to be set. In fluoroscopy mode, a longer duration may be set than in dynamic imaging mode.

[0085] If the radiation generator 110 cannot repeat pulsed radiation emission multiple times per predetermined time, it may emit radiation continuously for a predetermined time. In fluoroscopy mode, radiation is emitted as long as emission is instructed by the emission button. In other words, in fluoroscopy mode, if no duration is set, radiation is emitted indefinitely as long as emission is instructed.

[0086] The control circuit 330 sets various imaging conditions (tube voltage, tube current, radiation time, tube current-time product (mAs value), imaging site, imaging direction, etc.) to at least the radiation generator 110 based on the input from the input unit 310. The control circuit 330 may also set the various imaging conditions to the radiation detection device 120. The control circuit 330 may set the various imaging conditions based on imaging order information obtained from another system (HIS, RIS, etc.) or based on the user (e.g., technician). For example, the control circuit 330 may set the various imaging conditions to the radiation generator 110 and / or radiation detection device 120 based on a table in which imaging order information or the user corresponds to various imaging conditions.

[0087] The control circuit 330 may cause the output unit 320 to issue an alarm if the various shooting conditions set do not meet the requirements for use as a general-purpose imaging device, and the current mode notified by the control circuit 330 is the general-purpose imaging mode.

[0088] [mode] The mobile radiography unit 100 has multiple modes, such as a general radiography mode and a fluoroscopy mode. It may have three or more modes. The general radiography mode may also be a dynamic radiography mode. The mode may be set by input from the input unit 310. The mode may be set by selecting from multiple radiography modes displayed on the output unit 320. The mode may also be set by a switch. The radiography mode of the mobile radiography unit 100 may be set according to the patient to be radiographed, the examination order, or the radiography order.

[0089] The amount of radiation emitted in motion imaging mode may differ from the amount of radiation emitted in fluoroscopy mode. The amount of radiation emitted in fluoroscopy mode may be greater than the amount of radiation emitted in motion imaging mode.

[0090] Furthermore, while there is a radiation time in dynamic imaging mode, there is no radiation time in fluoroscopy mode. In other words, in dynamic imaging mode, even if radiation instructions are continuously output, the mobile medical unit 100 will stop emitting radiation once the radiation time has elapsed, but in fluoroscopy mode, it will continue to emit radiation as long as radiation instructions are being output.

[0091] When the fluoroscopy mode is set, the control circuit 330 may display the video generated by the radiation detection device 120 in real time on the input / output unit 141. When the dynamic imaging mode is set, the control circuit 330 may display a more restricted video on the input / output unit 141 than the video displayed when the fluoroscopy mode is set. When the dynamic imaging mode is set, the input / output unit 141 may display, for example, a delayed video compared to when the fluoroscopy mode is set. When the dynamic imaging mode is set, the input / output unit 141 may display at, for example, a lower frame rate than when the fluoroscopy mode is set. The control circuit 330 may restrict the video generated by the radiation detection device 120, or may restrict the video generated by the radiation detection device 120.

[0092] The control circuit 330 causes the input / output unit 141 to display video according to the set mode, allowing it to be used in controlled areas in the same way as a fluoroscopy device and in general hospital rooms as a dynamic imaging device. The permissible radiation dose in dynamic imaging mode is less than the permissible radiation dose in fluoroscopy mode.

[0093] [Mode Information] The dynamic imaging mode is used as a general radiography device and can therefore be used in general patient rooms. However, the fluoroscopy mode is used as a fluoroscopy device, and its use is strictly restricted; it cannot be used in general patient rooms. In other words, while the mobile ward unit 100 can be used in fluoroscopy mode in certain locations, Japanese law requires it to be used in dynamic imaging mode in other locations.

[0094] Therefore, the mobile medical unit 100 has an input / output unit 141 that provides notifications regarding the mode. The output unit 320 may provide a notification prompting the user to switch from fluoroscopy mode to dynamic imaging mode. The output unit 320 may also provide a notification prompting the user to switch from dynamic imaging mode to fluoroscopy mode.

[0095] [Notification timing] The mobile warding vehicle 100 may notify before it moves or when it starts moving. Since the mobile warding vehicle 100 often moves after being set up, it is effective to notify before it moves and / or when it starts moving. For example, the mobile warding vehicle 100 may notify when it acquires imaging information from the RIS. The mobile warding vehicle 100 may notify based on whether the acquired imaging information is fluoroscopy or dynamic imaging. For example, the mobile warding vehicle 100 may notify when the lock on the fixing means is released. Since the mobile warding vehicle 100 moves after the lock is released, it can be said that the lock is released before it moves. For example, the mobile warding vehicle 100 may notify when its movement is detected. The detection of the movement of the mobile warding vehicle 100 may be performed by detecting the rotation of the wheels 145. For example, the mobile warding vehicle 100 may notify when the power supply unit 142 is disconnected from the commercial power supply and power supply by battery begins. For example, the mobile medical unit 100 may notify when the main unit 140 is powered on and the power supply unit 142 begins supplying power. For example, the mobile medical unit 100 may notify when the communication method of the mobile medical unit 100 is changed from wired communication to wireless communication. For example, the mobile medical unit 100 may notify when it detects that the handle 143 is being held.

[0096] The mobile medical unit 100 may send a notification while it is moving. The mobile medical unit 100 may send a notification, for example, when it has traveled a predetermined distance. The mobile medical unit 100 may send a notification, for example, when a predetermined amount of time has elapsed since the mobile medical unit 100 began moving.

[0097] The mobile medical unit 100 may also send a notification after it has moved. The mobile medical unit 100 may also send a notification, for example, when the power supply unit 142 is connected to commercial power. The mobile medical unit 100 may also send a notification, for example, when the switch on the main unit 140 is activated and the power supply unit 142 begins supplying power. The mobile medical unit 100 may also send a notification, for example, when the fixing means is locked.

[0098] The mobile medical unit 100 may notify when it starts taking images. The mobile medical unit 100 may notify, for example, when it receives an instruction to start taking images from the input unit 310. After notification, the mode may be confirmed before taking images can begin.

[0099] [Notification method] For example, notification from the mobile medical unit 100 is made by outputting to the input / output unit 141. If the input / output unit 141 is separated into an input unit 310 and an output unit 320, the notification may be made by outputting to the output unit 320. The output unit 320 may, for example, provide notification by displaying it on a monitor. The output unit 320 may, for example, provide notification by lighting up an indicator light on the main unit 140. The color of the indicator light may be changed according to the current mode. The output unit 320 may, for example, provide notification by locking the fixing means. The output unit 320 may, for example, provide notification by voice. The output unit 320 may, for example, provide notification by vibration of the main unit 140 or a part of the main unit 140. If the main unit 140 is equipped with a handle, the output unit 320 may provide notification by vibration of the handle.

[0100] Notifications may be provided using multiple methods. For example, notifications may be displayed on a monitor and made by sound. For example, notifications may be made using a monitor display, indicator lights, sound, and steering wheel vibration.

[0101] [Notification content] A notification regarding mode settings may indicate that fluoroscopy mode is selected. A notification regarding mode settings may indicate that dynamic imaging mode or general imaging mode is selected. A notification regarding mode settings may indicate the current mode. A notification regarding mode settings may prompt confirmation of the current mode. A notification regarding mode settings may indicate that mode settings are complete. A notification regarding mode settings may indicate that mode settings are in progress. The mobile unit 100 may also notify whether the imaging information acquired from the RIS is fluoroscopy or dynamic imaging.

[0102] Figure 4 shows an example of a window 400 that appears on the screen when notifying the user that the current mode is transparency mode. The color of window 400 may change depending on the mode being notified. By displaying the current mode or notifying the user that it is transparency mode, the user can be prompted to switch to dynamic shooting mode.

[0103] If the current mode is X-ray mode, a button to instruct the user to switch to motion shooting mode may be displayed. The size of the "OK" button 410 may be different from the size of the "Set to motion shooting mode" button 420. The size of button 410 may be smaller than the size of button 420. The sizes of button 410 and button 420 may be the same.

[0104] If the current mode is dynamic shooting mode, the button instructing you to switch to fluoroscopy mode may be displayed at a smaller size than the "OK" button. Alternatively, the button instructing you to switch to fluoroscopy mode may not be displayed at all.

[0105] By reducing the size of the button that maintains the transparency mode, the operator is required to carefully check whether the device is in transparency mode, thus enabling them to perform the necessary checks when using the device in transparency mode.

[0106] By not displaying the button that instructs the user to switch to X-ray mode, or by making the button small, the possibility of accidentally switching to X-ray mode can be reduced, thereby preventing exposure due to incorrect operation.

[0107] Figure 5 shows an example of window 500 displayed on the screen when the setting to dynamic shooting mode is complete. The color of window 500 may be changed depending on the mode after completion.

[0108] Figure 6 shows an example of window 600 displayed on the screen when notifying that the setting to dynamic shooting mode is not complete. The color of window 600 may be different from the color of window 500. Notifying that the setting to dynamic shooting mode is not complete can prompt the user to set it to dynamic shooting mode.

[0109] [flowchart] Figure 9 shows an example of a flowchart of the processing performed by the control circuit 330. Figure 9 shows how to determine when to output an alarm. The control circuit 330 is controlled by the status of the mobile medical unit 100.

[0110] The control circuit 330 determines whether or not the power to the mobile medical unit 100 has been turned on (step S901). If the control circuit 330 determines that the power to the mobile medical unit 100 has been turned on, it performs the process in step S913. If the control circuit 330 determines that the power to the mobile medical unit 100 has not been turned on, it performs the process in step S902.

[0111] The control circuit 330 determines whether the fixing means of the mobile medical cart 100 has been released (step S902). If the control circuit 330 determines that the fixing means of the mobile medical cart 100 has been released, it performs the process in step S913. If the control circuit 330 determines that the fixing means of the mobile medical cart 100 has not been released, it performs the process in step S903.

[0112] The control circuit 330 determines whether the mobile medical unit 100 has been disconnected from the commercial power supply (step S903). The control circuit 330 may also determine whether the mobile medical unit 100 has started receiving power from its battery. If the control circuit 330 determines that the mobile medical unit 100 has been disconnected from the commercial power supply, it performs the process in step S913. If the control circuit 330 determines that the mobile medical unit 100 has not been disconnected from the commercial power supply, it performs the process in step S904.

[0113] The control circuit 330 determines whether the mobile medical unit 100 has acquired imaging information from the RIS (step S904). The control circuit 330 may also make this determination based on the content of the acquired imaging information. If the control circuit 330 determines that the mobile medical unit 100 has acquired imaging information from the RIS, it performs the process in step S913. If the control circuit 330 determines that the mobile medical unit 100 has not acquired imaging information from the RIS, it performs the process in step S905.

[0114] The control circuit 330 determines whether the communication method used by the mobile medical unit 100 has been changed from wired communication to wireless communication (step S905). If the control circuit 330 determines that the communication method used by the mobile medical unit 100 has been changed from wired communication to wireless communication, it performs the process in step S913. If the control circuit 330 determines that the communication method used by the mobile medical unit 100 has not been changed from wired communication to wireless communication, it performs the process in step S906.

[0115] The control circuit 330 determines whether the handle of the medical cart 100 is being held (step S906). If the control circuit 330 determines that the handle of the medical cart 100 is being held, it performs the process in step S913. If the control circuit 330 determines that the handle of the medical cart 100 is not being held, it performs the process in step S907.

[0116] The control circuit 330 determines whether or not it has detected movement of the mobile medical cart 100 (step S907). The control circuit 330 may also detect movement of the mobile medical cart 100 by detecting the rotation of the wheels 145. If the control circuit 330 determines that it has detected movement of the mobile medical cart 100, it performs the process in step S913. If the control circuit 330 determines that it has not detected movement of the mobile medical cart 100, it performs the process in step S908.

[0117] The control circuit 330 determines whether the mobile medical vehicle 100 has traveled a predetermined distance (step S908). The control circuit 330 may also detect that the mobile medical vehicle 100 has traveled a predetermined distance based on the rotation speed of the wheels 145. If the control circuit 330 determines that the mobile medical vehicle 100 has traveled a predetermined distance, it performs the process in step S913. If the control circuit 330 determines that the mobile medical vehicle 100 has not traveled a predetermined distance, it performs the process in step S909.

[0118] The control circuit 330 determines whether a predetermined time has elapsed since the mobile medical unit 100 started moving (step S909). If the control circuit 330 determines that a predetermined time has elapsed since the mobile medical unit 100 started moving, it performs the process in step S913. If the control circuit 330 determines that a predetermined time has not elapsed since the mobile medical unit 100 started moving, it performs the process in step S910.

[0119] The control circuit 330 determines whether the fixing means of the mobile medical cart 100 is locked or not (step S910). If the control circuit 330 determines that the fixing means of the mobile medical cart 100 is locked, it performs the process in step S913. If the control circuit 330 determines that the fixing means of the mobile medical cart 100 is not locked, it performs the process in step S911.

[0120] The control circuit 330 determines whether the mobile medical unit 100 is connected to commercial power (step S911). If the control circuit 330 determines that the mobile medical unit 100 is connected to commercial power, it performs the process in step S913. If the control circuit 330 determines that the mobile medical unit 100 is not connected to commercial power, it performs the process in step S912.

[0121] The control circuit 330 determines whether or not the mobile medical unit 100 has been instructed to start imaging (step S912). If the control circuit 330 determines that the mobile medical unit 100 has been instructed to start imaging, it proceeds to step S913. If the control circuit 330 determines that the mobile medical unit 100 has not been instructed to start imaging, it returns to step S901.

[0122] The control circuit 330 causes the input / output unit 141 to send a notification regarding the setting of the shooting mode (step S913). That is, if Yes is determined in any of steps S901 to S912, a notification regarding the setting of the shooting mode is sent. The display format may be changed depending on which step Yes was determined in.

[0123] If a notification is sent to the input / output unit 141 in step S913, or if No is determined in any of the steps from S901 to S912, the process returns to step S901.

[0124] Some steps from S901 to S912 may be omitted.

[0125] The "Notification regarding the setting of the shooting mode" may be a notification about the process performed in step S1003 of Figure 10, for example, "The door has been locked," or a notification about the process performed in step S1004 of Figure 10, for example, "Radiation dose has been limited." The "Notification regarding the setting of the shooting mode" may be output from the output unit 320 of the mobile medical unit 100, or from an output device installed in the building. The "Notification regarding the setting of the shooting mode" may contain multiple contents. For example, the notification may be, "The system is set to fluoroscopy mode. Please lock the door."

[0126] [Operation 2] Next, we will explain how the system works when an alarm is issued to the building.

[0127] The building control system recognizes whether the mobile medical unit 100 is located within or outside the controlled area.

[0128] The building control device may determine whether the mobile medical unit 100 is located within or outside the controlled area, or the mobile medical unit 100 may transmit the result of its determination to the building control device. Alternatively, the building control device may recognize the status of the mobile medical unit 100 (mode, location, movement status, etc.) by receiving it from the communication unit 144.

[0129] For example, the building control device may output an alarm within the building depending on the status of the recognized mobile medical unit 100. The alarm may be the same as the alarm of the mobile medical unit 100. For example, the mode of the mobile medical unit 100 may be displayed on a display installed in the controlled area. For example, if the mobile medical unit 100, which is set to fluoroscopy mode, is located outside the controlled area, the building control device may sound a buzzer installed outside the controlled area. For example, if the mobile medical unit 100, which is set to fluoroscopy mode, is located inside the controlled area, a message such as "Please lock the door" may be output from an output device (e.g., a display or speaker) inside the controlled area. The alarms issued by the building control device and the alarms issued by the mobile medical unit 100 may be the same or different. For example, the control circuit 330 of the mobile medical unit 100 may output "Set to fluoroscopy mode" from the display of the mobile medical unit 100, and the building control device may output "Please lock the door" from a speaker inside the controlled area. For example, the sound output by the building control device and the sound output by the output unit 320 of the mobile medical unit 100 may have different timbres.

[0130] [Operation 3] Next, I will explain the hardware requirements for the mobile medical unit 100.

[0131] The mobile medical unit 100 recognizes whether it is located within or outside the controlled area. Alternatively, the building management device may determine whether it is located within or outside the controlled area, and the mobile medical unit 100 may recognize the result of the building management device's determination by receiving it from the communication unit 144.

[0132] If the control circuit 330 recognizes that the mobile medical unit 100, which is set to fluoroscopy mode, is located within the controlled area, it prevents the mobile medical unit 100 from moving outside the controlled area. For example, the control circuit 330 controls a fixing means (not shown) to fix the wheels 145 of the mobile medical unit 100. For example, the control circuit 330 controls a fixing means (not shown) to fix the mobile medical unit 100 to a wire fixed to a wall constituting the controlled area. The movement of the mobile medical unit 100 is restricted to the range of the wire. The control circuit 330 performs at least one of fixing the wheels 145 and fixing the wire.

[0133] When the mobile medical unit 100 is set to fluoroscopy mode, the control circuit 330 may prevent the mobile medical unit 100 from moving. In this case, the fluoroscopy mode setting is made at the location where the mobile medical unit 100 will be used.

[0134] If the mobile medical unit 100 is recognized as being outside the controlled area, it will restrict radiation emission outside the controlled area. For example, it will perform at least one of the following (1)-(7). (1) The control circuit 330 shuts down (powers off) the mobile ward ward 100. When it moves outside the controlled area, the power to the mobile ward ward 100 is turned off. For example, if the default setting for the mobile ward ward is dynamic analysis mode, it can be set to dynamic analysis mode when the power to the mobile ward ward 100 is turned on. A reset can be used instead of a shutdown. Also, since a new setting needs to be made, radiation from the previous setting (for example, fluoroscopy mode) can be prevented. (2) The control circuit 330 stops supplying power to the mobile medical unit 100. When the power supply to the mobile medical unit 100 is stopped, the mobile medical unit 100 operates using the power of the storage battery. For example, if the power of the storage battery is not large and the setting is such that radiation emission by fluoroscopy mode cannot be used with the storage battery, radiation emission by fluoroscopy mode can be prevented. (3) The control circuit 330 shuts off (shuts down) the power supply to the radiation generator 110. By shutting off the power supply to the radiation generator 110, radiation from the fluoroscopy mode can be prevented. The power supply to the radiation generator may be restarted when the mobile medical unit 100 is set to dynamic analysis mode or when it is recognized that it is located within the controlled area. (4) The control circuit 330 switches the mode of the radiation generator 110 to dynamic imaging mode. For example, when it recognizes that the mobile medical unit 100 is outside the controlled area, the control circuit 330 forcibly sets (changes) the mode of the radiation generator 110 to dynamic imaging mode. (5) The control circuit 330 disables the fluoroscopy mode. For example, if it recognizes that the mobile medical unit 100 is outside the controlled area, the control circuit 330 prevents the radiation generator 110 from operating in fluoroscopy mode. (6) The control circuit 330 prevents radiation exceeding the upper limit (permissible radiation dose) from being emitted from the radiation generator 110. The control circuit 330 may change (for example, lower) the upper limit (permissible radiation dose). For example, the control circuit 330 prevents radiation exceeding the permissible radiation dose by limiting the irradiation time in fluoroscopy mode. (7) The control circuit 330 prevents the setting of the fluoroscopy mode. For example, the control circuit 330 grays out the fluoroscopy mode on the settings screen of the mobile medical unit 100. The control circuit 330 may also allow the setting to be changed to fluoroscopy mode when it determines that the mobile medical unit 100 is within the controlled area.

[0135] The control circuit 330 can prevent radiation emission exceeding the permissible radiation dose (upper limit) outside the controlled area by limiting radiation emission outside the controlled area.

[0136] [Operation 4] Next, I will explain the building's hardware requirements.

[0137] The building control device recognizes whether the mobile radiograph 100 is located within or outside the controlled area, and whether it is in fluoroscopy mode or general radiography mode. The building control device may determine whether the mobile radiograph 100 is located within or outside the controlled area, or the mobile radiograph 100 may determine whether it is located within or outside the controlled area, and the building control device may recognize this by receiving the mobile radiograph 100's determination. The building control device recognizes whether the mobile radiograph 100 is in fluoroscopy mode or general radiography mode by receiving from the mobile radiograph 100 whether it is in fluoroscopy mode or general radiography mode.

[0138] The building control device controls the locks on the doors constituting the controlled area according to the status of the mobile medical unit 100. For example, if the mobile medical unit 100 is within the controlled area and set to fluoroscopy mode, the building control device locks the doors constituting the controlled area. Conversely, if the mobile medical unit 100 is outside the controlled area, or if the mobile medical unit 100 is within the controlled area and set to dynamic imaging mode, the building control device unlocks the doors constituting the controlled area.

[0139] If there are multiple mobile medical units 100, and at least one mobile medical unit 100 is located within the controlled area and set to fluoroscopy mode, the doors constituting the controlled area may be locked. If another mobile medical unit 100 moves into the controlled area, the doors may be temporarily unlocked.

[0140] By locking the door, it is possible to prevent the mobile medical unit 100, which is set to fluoroscopy mode, from moving outside the controlled area.

[0141] Alternatively, the wire fixed to the mobile medical unit 100 may be fixed to or released from the wall constituting the controlled area. By fixing the wire fixed to the mobile medical unit 100 to the wall constituting the controlled area, the movement of the mobile medical unit 100 is limited to the range of the wire, thereby preventing it from moving outside the controlled area.

[0142] The building control device controls the lock on the door and performs at least one of the following: locking or unlocking the wire.

[0143] <Variation> It is desirable that the control circuit 330 has a function to restrict the operation of the radiation button in fluoroscopy mode. It is also desirable that the control circuit 330 performs user authentication, allowing only authenticated users to operate the radiation button in fluoroscopy mode. Authenticated users are those authorized by the hospital, such as doctors and radiologists. Authentication can be performed using well-known authentication methods such as an ID or account and password, employee ID and / or biometric authentication.

[0144] The control circuit 330 may perform user authentication. If the control circuit 330 authenticates that the user is authorized, it may allow the user to switch to the X-ray mode. If the user is not authorized, it may restrict operation to the dynamic shooting mode, or disable all operations. It may also authenticate users who are restricted to operation in the dynamic shooting mode.

[0145] The control circuit 330 may enable a change to the first mode when the imaging order or inspection order received from the RIS, etc., is for imaging or inspection using fluoroscopy mode. The control circuit 330 may be configured based on the imaging order or inspection order received from the RIS. The configuration of the control circuit 330 based on the imaging order or inspection order received from the RIS may be modified by the input / output unit 141.

[0146] The building control device does not have to be installed in the building where the controlled area is located. For example, it may be controlled by the control circuit 330 of the mobile medical unit 100, or it may be remotely controlled by a control device installed in another building.

[0147] The mode of the mobile medical unit 100 may be automatically set based on whether it is located in a specific location where a fluoroscopy device can be used, or in a location where a fluoroscopy device cannot be used but a general radiography device can be used. When the mode of the mobile medical unit 100 is set, or when it is recognized that the mobile medical unit 100 is located in a location where a fluoroscopy device can be used, the input / output unit 141 may provide notification regarding the mode setting.

[0148] When setting to transparent mode, or when transparent mode has been set, a confirmation screen may be displayed.

[0149] The control circuit 330 may always provide notifications regarding mode settings. The control circuit 330 may provide notifications by multiple notification means. For example, the control circuit 330 may always provide notifications of the current mode by indicator lights, and may also provide notifications by displaying on the monitor when the mobile medical unit 100 is instructed to start imaging.

[0150] Figure 7 shows an example of the window 700 that appears on the screen when perspective mode can be selected.

[0151] Furthermore, the mobile ward unit 100 may automatically set the fluoroscopy mode and the dynamic imaging mode according to the imaging information received from the RIS, and the input / output unit 141 may notify the user that the set mode has been set or that the mode setting is complete. The size of the "Change to fluoroscopy mode" button 710 may be different from the size of the "Keep dynamic imaging mode" button 720. The size of button 710 may be smaller than the size of button 720. The sizes of button 710 and button 720 may be the same.

[0152] A confirmation window may appear when switching to perspective mode.

[0153] Figure 8 shows an example of a confirmation window 800 when changing to fluoroscopy mode. In window 800, the size of the button 810 selected for "fluoroscopy mode," which is used in limited locations, may be smaller than the size of the button 820 selected for "dynamic shooting mode," which is used as a general imaging device. Alternatively, the confirmation screen may not be displayed when selecting dynamic shooting mode, but may be displayed when selecting fluoroscopy mode.

[0154] The setting mechanism allows for more careful handling when switching the mobile medical unit 100 to fluoroscopy mode by displaying a smaller button for the fluoroscopy mode than the button for the dynamic imaging mode.

[0155] Furthermore, by displaying a confirmation screen only when the setting method is set to fluoroscopy mode, more careful processing can be performed when the mobile medical unit 100 is set to fluoroscopy mode.

[0156] While embodiments have been described above with reference to the drawings, this disclosure is not limited to such examples. It will be apparent to those skilled in the art that various modifications or alterations can be conceived within the scope of the claims. Such modifications or alterations are also understood to fall within the technical scope of this disclosure. Furthermore, the components in the embodiments may be combined in any way without departing from the spirit of this disclosure.

[0157] (1) A mobile radiography system in one embodiment of the present disclosure includes a radiation-emitting device that can be set to a plurality of imaging modes, including a first mode for performing fluoroscopy and a second mode which is a general imaging mode for acquiring a series of multiple frame images by irradiating a subject with radiation, and a control device that restricts the use of the first mode outside of a controlled area.

[0158] (2) A mobile radiography system in one embodiment of the present disclosure is the mobile radiography system of (1), wherein the mobile radiography system is a mobile medical vehicle, and the mobile medical vehicle comprises the radiation generator and the control device.

[0159] (3) A mobile radiography system according to one embodiment of the present disclosure, in the mobile radiography system of (2), wherein the control device is at least one of (1) a control device for controlling the mobile medical unit and (2) a control device for controlling the building in which the controlled area is installed, and performs at least one of (1) outputting an alarm to the user and (2) causing the mobile medical unit to limit radiation emission outside the controlled area.

[0160] (4) In one embodiment of the present disclosure, the mobile radiography system is the mobile radiography system of (3), wherein the alarm is notified at least one of the following: (1) before the mobile radiography vehicle moves and / or when it starts to move; (2) when the fixing means for the mobile radiography vehicle is released; (3) when the mobile radiography vehicle is disconnected from commercial power; (4) when the mobile radiography vehicle acquires imaging information from the radiology information system (RIS); (5) when communication between the main body of the mobile radiography vehicle and the radiation detection device is switched from wired communication to wireless communication; (6) when it is detected that the handle of the mobile radiography vehicle is being held; (7) when it is detected that the mobile radiography vehicle is moving; (8) while the mobile radiography vehicle is moving; (9) when the mobile radiography vehicle has moved a predetermined distance; (10) when a predetermined time has elapsed since the mobile radiography vehicle started to move; (11) after the mobile radiography vehicle has moved; (12) when the fixing means for the mobile radiography vehicle is locked; (13) when the mobile radiography vehicle is connected to commercial power; (14) when it is instructed to start imaging.

[0161] (5) A mobile radiography system in one embodiment of the present disclosure is the mobile radiography system of (3), wherein the alarm is a notification by at least one of (1) display on a monitor, (2) lighting, or (3) sound.

[0162] (6) A mobile radiography system in one embodiment of the present disclosure, in the mobile radiography system of (2), the alarm notifies at least one of (1) that it is in fluoroscopy mode, (2) that it is in the current mode, or (3) that the mode setting is complete.

[0163] (7) A mobile radiography system according to one embodiment of the present disclosure, wherein the control device is a control device for controlling the mobile medical vehicle and performs at least one of the following: (1) outputting an alarm to the user; (2) causing the mobile medical vehicle to restrict radiation emission outside the controlled area.

[0164] (8) In one embodiment of the present disclosure, the mobile radiography system, in the mobile radiography system of (6), prevents the mobile radiography vehicle from moving outside the controlled area when the control device is set to the first mode.

[0165] (9) A mobile radiography system in one embodiment of the present disclosure, in the mobile radiography system of (7), wherein the control device performs at least one of (1) controlling a fixing means for fixing the mobile radiography vehicle, and (2) fixing the mobile radiography vehicle to a wire fixed to a wall constituting a controlled area.

[0166] (10) In one embodiment of the present disclosure, the mobile radiography system in the mobile radiography system of (6) wherein the control device controls the radiation generator to prevent it from emitting a radiation dose exceeding the permissible radiation dose when the radiation generator is located outside the controlled area.

[0167] (11) In one embodiment of the present disclosure, the mobile radiography system, in the mobile radiography system of (9), if the control device recognizes that the radiation generator is set to the first mode and the mobile examination vehicle is outside the controlled area, it performs at least one of the following: (1) shutting down the mobile examination vehicle; (2) stopping the power supply to the mobile examination vehicle; (3) cutting off the power supply to the radiation generator; (4) switching the mode of the radiation generator to the second mode; (5) making the first mode unusable; (6) preventing radiation exceeding the permissible radiation dose from being emitted from the radiation generator; and (7) preventing the setting of the fluoroscopy mode.

[0168] (12) A mobile radiography system according to one embodiment of the present disclosure, wherein the mobile radiography system according to (1) is a control device that controls a building in which a controlled area is installed, and performs at least one of (1) outputting an alarm to the user and (2) causing the mobile radiography vehicle to restrict radiation emission outside the controlled area.

[0169] (13) A mobile radiography system in one embodiment of the present disclosure, in the mobile radiography system of (11), wherein the control device performs at least one of the following when the mobile radiography vehicle is located within a controlled area: (1) locking the doors constituting the controlled area; (2) securing the wires fixed to the mobile radiography vehicle to the walls constituting the controlled area.

[0170] (14) A method for restricting a mobile radiography system in one embodiment of the present disclosure is a mobile radiography system that can be set to a plurality of imaging modes, including a first mode for performing fluoroscopy and a second mode which is a general imaging mode for acquiring a series of multiple frame images by irradiating a subject with radiation, wherein the use of the first mode is restricted outside of a controlled area. [Industrial applicability]

[0171] This disclosure is useful for radiography equipment. [Explanation of Symbols]

[0172] 100th Medical Vehicle 110 Radiation Generator 111 Generator 112 Collimator 120 Radiation detection device 121, 144 Communications Department 130 Arm 131 Vertical Arm 132 Horizontal Arm 140 Main body 141 Input / output section 142 Power supply section 143 Handle 145 Wheels 310 Input section 320 Output section 330 Control Circuit 400, 500, 600, 700, 800 windows 410, 420, 710, 720, 810, 820 buttons

Claims

1. A radiation-emitting device that can be set to multiple shooting modes, including a first mode for fluoroscopic imaging and a second mode, a general imaging mode that acquires a series of multiple frame images by irradiating the subject with radiation, A control device that performs processing to restrict the use of the first mode outside the controlled area, It has, The process for restricting the use of the first mode does not restrict setting to the second mode. Mobile radiography system.

2. The aforementioned mobile radiography system is a mobile medical unit. The mobile medical unit is equipped with the radiation generator and the control device. The mobile radiography system according to claim 1.

3. The control device is (1) Control device for controlling the mobile medical vehicle (2) Control device for controlling buildings in which controlled areas are installed. At least one control device, (1) Output an alarm to the user. (2) Restrict the emission of radiation from the mobile medical unit outside the controlled area. Perform at least one of the following: The mobile radiography system according to claim 2.

4. The aforementioned alarm is, (1) Before the mobile medical unit moves and / or when it starts moving (2) When the fixing means of the mobile medical cart is released (3) When the mobile medical unit is disconnected from commercial power (4) When the mobile radiology unit acquires imaging information from the radiology information system (RIS) (5) When the communication between the main body of the mobile medical unit and the radiation detection device is switched from wired communication to wireless communication. (6) When it is detected that the handle of the mobile medical vehicle is being held (7) When the movement of the mobile medical vehicle is detected (8) While the medical van is moving (9) When the mobile medical vehicle has traveled a predetermined distance (10) When a predetermined time has elapsed since the mobile medical unit began to move. (11) After the mobile medical unit has moved (12) When the fixing means of the mobile medical cart is locked (13) When the mobile medical unit is connected to commercial power (14) When filming is instructed to begin Notify at least one of the following: The mobile radiography system according to claim 3.

5. The aforementioned alarm is, (1) Display on the monitor (2) Lighting (3) Audio Notification by at least one of the following: The mobile radiography system according to claim 3.

6. The aforementioned alarm is, (1) It is in X-ray mode. (2) Current mode (3) Mode setting is complete. Notify at least one of the following: The mobile radiography system according to claim 3.

7. The control device is a control device for controlling the mobile medical vehicle, (1) Output an alarm to the user. (2) Restrict the emission of radiation from the radiation generating device outside the controlled area. Perform at least one of the following: The mobile radiography system according to claim 2.

8. When the control device is set to the first mode, it prevents the medical cart from moving outside the controlled area. The mobile radiography system according to claim 7.

9. The control device is (1) Controlling the fixing means for fixing the medical cart. (2) The mobile medical cart is fixed to a wire that is fixed to the wall constituting the controlled area. Perform at least one of the following: The mobile radiography system according to claim 8.

10. The control device, when the radiation generating device is located outside the controlled area, controls the radiation generating device to prevent it from emitting radiation exceeding the permissible radiation dose. The mobile radiography system according to claim 7.

11. The control device, when it recognizes that the radiation generator is set to the first mode and the mobile medical unit is outside the controlled area, (1) Shut down the mobile medical unit. (2) Stop supplying power to the mobile medical unit. (3) Cut off the power supply to the radiation generating device. (4) Switch the mode of the radiation generator to the second mode. (5) Disable the first mode. (6) Ensure that radiation exceeding the permissible radiation dose is not emitted from the radiation generating device. (7) Disable the setting of the X-ray mode. Perform at least one of the following: The mobile radiography system according to claim 10.

12. The control device is a control device that controls a building in which a controlled area is installed. (1) Output an alarm to the user. (2) Restrict the emission of radiation from the radiation generating device outside the controlled area. Perform at least one of the following: The mobile radiography system according to claim 2.

13. The control device is used when the mobile medical unit is located within the controlled area. (1) Lock the doors that make up the controlled area. (2) The wire fixed to the mobile medical cart is fixed to the wall that constitutes the controlled area. Perform at least one of the following: The mobile radiography system according to claim 12.

14. The control device is Compared to setting to any other mode other than the first mode, setting to the first mode requires the user to make a more careful mode change. The mobile radiography system according to claim 1.

15. The control device is By allowing the user to change to the first mode only to users who have been authenticated with the necessary permissions to do so, the user can perform the mode change cautiously. The mobile radiography system according to claim 14.

16. The control device is By making the display size of the button for setting to the first mode smaller than the display size of the button for setting to the other modes, the mode change is made more careful. The mobile radiography system according to claim 14.

17. The control device is By not confirming the mode change when setting to the other modes, but confirming the mode change when setting to the first mode, the mode change is made more cautious. The mobile radiography system according to claim 14.

18. In a mobile radiography system that can be set to multiple shooting modes, including a first mode for fluoroscopic imaging and a second mode, which is a general imaging mode that acquires a series of multiple frame images by irradiating the subject with radiation, Processes are taken to restrict the use of the first mode outside the controlled area. The process for restricting the use of the first mode does not restrict setting to the second mode. Methods for limiting mobile radiography systems.

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