JP2013223538A - Control apparatus, radiation imaging system and control method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform radiography by synchronizing a radiant ray generation apparatus and a radiant ray detector by a simple structure.SOLUTION: In a control apparatus 1203, a first wireless communication part 1245 wirelessly receives a request of a wireless communication parameter from a radiant ray detector 1204, and wirelessly transmits the wireless communication parameter to the radiant ray detector 1204. A second wireless communication part 1247 communicates with the radiant ray detector 1204 based on the wireless parameter. The first wireless communication part 1245 receives a signal indicating that an exposure switch 1201 is pressed. The second wireless communication part 1247 transmits a signal for transition of the state of the radiant ray detector 1204 to a radiant ray detectable state, and receives a signal indicating that the radiant ray detector 1204 is in the radiant ray detectable state. The first wireless communication part 1245 further transmits a signal indicating that the radiant ray detector 1204 is in the detectable state.

Description

  The present invention relates to a control device, a radiation imaging system, and a control method.

An X-ray detector that irradiates a subject with X-rays from an X-ray generation device and obtains an X-ray image indicating the intensity distribution of the X-rays transmitted through the subject as digital data, and a digital X-ray imaging system using the device Has been commercialized.
In such a digital X-ray imaging system, X-ray imaging is performed while controlling the state of the X-ray detector, such as activation of the X-ray detector and transition to an accumulation state. Patent Document 1 discloses a technique for performing imaging control by transmitting information of an X-ray irradiation switch from an X-ray generator to an X-ray detector for controlling the state of the X-ray detector. Patent Document 2 discloses a technology for transitioning to a state in which an X-ray detector can detect an X-ray and obtain an image in response to the detection of the X-ray by the X-ray generator. .

JP 2000-308632 A Japanese Patent Laid-Open No. 11-155847

  However, when the X-ray generator exchanges signals with the X-ray detector as in Patent Document 1, communication is difficult when there is no dedicated interface on the X-ray generator side. When the X-ray detector changes the state according to the detection of X-rays as in Patent Document 2, if the detection of X-ray irradiation start or X-ray irradiation stop is delayed, a low-quality image is obtained. .

  Therefore, a radiography control apparatus according to an embodiment of the present invention includes a first wireless reception unit that wirelessly receives a request for wireless communication parameters from a radiation detector, and wirelessly transmits wireless communication parameters to the radiation detector. A first wireless transmission unit for transmission, and a second wireless reception unit and a second wireless transmission unit for communicating with the radiation detector according to the wireless parameter, wherein the first wireless reception unit The second wireless transmission unit receives a signal indicating that the instruction switch has been pressed, and transmits a signal for causing the radiation detector to transition to a state in which radiation detection is possible, and the second wireless reception The unit receives a signal indicating that the radiation detector is ready for radiation detection, and the first wireless transmission unit receives a signal indicating that the radiation detector is ready for detection. To send And butterflies.

  According to the present invention, imaging by a digital radiation detector can be performed with a simple configuration by using, for synchronous imaging, a wireless communication unit that transmits and receives wireless communication parameters for enabling a radiation detector to be used in a radiation imaging system. Can do.

It is a block diagram of an X-ray imaging system when a switch unit having a synchronous interface is connected to an X-ray generator. It is a block diagram of the X-ray imaging system at the time of connecting the switch unit which does not have a synchronous interface to an X-ray generator. It is a figure which shows the structure inside an X-ray detector. It is a figure which shows the example of the signal exchanged by an X-ray imaging system. It is a timing chart which shows the state of the signal at the time of imaging | photography start. It is a timing chart at the time of using the X-ray detector which concerns on other embodiment. It is a block diagram of an X-ray imaging system when another switch unit having a synchronous interface is connected to an X-ray generator via a repeater. 1 is a configuration diagram of an X-ray imaging system including a switch unit having a synchronization interface that performs one-way communication according to one embodiment. It is a block diagram of the X-ray imaging system containing the switch unit which has a synchronous interface which performs the one-way communication which concerns on other embodiment. It is a timing chart which shows the state of the signal at the time of a photography start at the time of using the synchronous interface which performs one-way communication. It is a timing chart at the time of using the X-ray detector which concerns on other embodiment. It is a block diagram of the X-ray imaging system containing the synchronous interface corresponding to the switch which transmits a signal by radio | wireless. It is a timing chart which shows the state of the signal concerning an embodiment. It is a timing chart at the time of using the X-ray detector which concerns on other embodiment. It is a figure which shows the structural example of the interface by the side of an X-ray detector. It is a figure which shows the structure of an X-ray imaging system at the time of providing the interface for a synchronization in an irradiation switch. It is a figure which shows the structural example of the synchronous interface provided in an irradiation switch. It is a timing chart at the time of providing the interface for a synchronization in an irradiation switch. It is a timing chart which shows the control which concerns on other embodiment. It is a flowchart which shows the flow of control of the X-ray imaging system which concerns on embodiment. It is a flowchart which shows the flow of control of the X-ray imaging system which concerns on other embodiment. It is a timing chart which shows the control which concerns on embodiment. It is a timing chart which shows control concerning other embodiments. It is a block diagram of an X-ray imaging system when a command communication interface is provided in the X-ray generator. 1 is a configuration diagram of an X-ray imaging system in which an X-ray generator and an X-ray detector communicate directly with a command communication interface. 1 is a configuration diagram of a mobile radiation imaging system according to an embodiment. It is a figure which shows the example of the GUI screen for imaging | photography displayed on the display part of a system.

  A radiation imaging system that is an example of an embodiment of the present invention will be described. Examples of the radiation system include a movable round-trip car, a mobile C-arm, and a stationary X-ray imaging system. Note that the last two digits of the symbols used in the description of the following embodiments may be the same in functionally common units or units having common elements.

  A radiation imaging system according to an embodiment will be described with reference to FIG. The radiation imaging system includes a radiation detector 104 that obtains a digital radiation image by detecting radiation such as X-rays, and a radiation generation device 108 that emits radiation such as X-rays. Signals can be exchanged via B. In the following description of the embodiments, the radiation generator may be referred to as a radiation imaging control device in that it controls imaging. Furthermore, the radiation generator B may be referred to as a switch unit B in terms of a unit including the irradiation switch 101.

  The radiation detector 104 detects radiation and obtains a digital radiation image. Communication with the radiation generation apparatus side is performed via an imaging apparatus side IF 103 and an imaging control unit 105 that controls the radiation detector 104. Here, the imaging apparatus-side IF 103, the imaging control unit 105, and the radiation detector 104 may be collectively referred to as an imaging apparatus or a radiation imaging apparatus. Note that there are cases where the imaging apparatus side I103 is directly connected to the radiation detector 104, and cases where the imaging apparatus side I103 is connected to the radiation detector 104 via a LAN configuration access point.

  The radiation generator 108 includes a high-pressure generator 106 including a control unit 1081 and the like, and a radiation source 107 such as an X-ray tube.

  The radiation generation control device B includes an irradiation switch 101, a generation device side IF (interface) 102, an imaging device side connection unit 131 (first connection unit), and a generation device side connection unit 130 (second connection unit). And an irradiation switch unit. The irradiation switch 101 is a switch for instructing radiation irradiation, and generates a signal (first signal) indicating that it has been pressed in response to being pressed by a photographer such as an engineer or a doctor. To do. By transmitting such a signal to the radiation generator 108, preparation for radiation irradiation and an irradiation instruction are performed. The irradiation switch 101 has a detection unit for detecting pressing down electromagnetically, mechanically, or optically, and an output unit that outputs an electrical or engineering signal (first signal) according to the detection, A signal is transmitted by a conductive cable or the like.

  The generator-side IF 102 includes an acquisition unit 102a, a control unit 102b, and an output unit 102c, and is connected to the irradiation switch 101 by a cable. Further, the control unit 105 on the imaging device side (radiation detector 104 side) and the imaging device side connection unit 131 are detachably connected. Moreover, it connects so that attachment or detachment is possible via the control part 1081 of the radiation generator 108 and the generator side connection part 130. FIG.

  The imaging device side connection unit 131 is realized by, for example, a connector for wired connection with a connection unit on the imaging device side IF (interface) 103 side.

  The generator side connection unit 130 is realized by, for example, a connector that can be attached to and detached from the connection unit of the radiation generation device 108.

  The acquisition unit 102a is electrically connected to the irradiation switch 101 and receives a first signal indicating that the irradiation switch has been pressed. In addition, a signal that has reached the generator IF 102 is acquired via the imaging device side connector 131 and the generator side connector 130.

  The radiation detector 104 outputs a signal (second signal) indicating the driving state of the radiation detector 104. The signal output here may be transmitted via a wired cable. However, the radiation detector 104 may be provided with a wireless transmission unit that transmits wirelessly. As a result, imaging using the radiation detector 104 can be performed without bothering the cable.

  The radiation detector 104 outputs a signal indicating that the radiation detector 104 has transitioned to a state in which radiation is received and imaging is possible. Here, the radiation detector 104 outputs a signal (second signal) indicating the driving state of the radiation detector to the radiation generation control device B constantly or periodically.

  The output second signal is transmitted by the imaging apparatus side connection unit 131 through the control unit 105 of the radiation detector and the imaging apparatus side IF 103, and is acquired by the acquisition unit 102a.

  In response to the acquisition unit 102a acquiring the signal from the irradiation switch 101 (first signal) and the signal from the radiation detector 104 (second signal), the control unit 102b generates the generator-side connection unit 130. A specific signal is output via the (second connection unit).

  The specific signal here may be either the first signal or the second signal, or may output a third signal different from both, but both the first signal and the second signal may be output. You can increase reliability by sending.

  Also, by outputting the first signal as a specific signal in response to the reception of the second signal, the radiation generator 108 only needs to be able to receive and interpret the signal of the irradiation switch 101 as before, so that analog radiography can be performed. Even in the radiation generator 108 used, digital radiography can be performed by a switch unit having a detachable switch.

  The radiation generation apparatus 108 is connected to the control unit 1081 by connecting to the generation apparatus side connection section 130 through a connection section on the radiation generation apparatus 108 side. As a result, a specific signal from the switch unit B is received. In response to the reception of the specific signal, the control unit 1081 controls the high-voltage generator 106 to generate a high voltage for generating radiation and to generate radiation from the radiation source 107.

  The generated radiation is detected by the radiation detector 104 to obtain radiation image data. This image data is transferred to the imaging control unit 105 by, for example, a wireless transmission unit. The imaging control unit 105 includes a display control unit, and can display the radiation image output from the radiation detector 104 by the display control unit on the display unit.

  As described above, the radiation generation control device B can be detachably connected to the imaging device including the radiation detector 104 and the radiation generation device 108, and can perform communication in response to pressing of the irradiation switch. In addition, by making it possible to connect the detachable connection unit of the switch unit to the radiation generator 108, it is possible to exchange signals with the radiation detector 104. Accordingly, a system capable of digital radiography such as exchange of imaging conditions before imaging, synchronization at the time of imaging, exchange of imaging execution information, and image transfer can be easily constructed.

  Here, in another embodiment, the control unit 102b captures a third signal for requesting information on the driving state of the radiation detector 104 in response to the acquisition unit 102a receiving a signal from the irradiation switch. The data is output via the device side connection unit 131. The third signal here can be output as it is to the photographing apparatus side as the third signal. In response to the third signals, the radiation detector 104 outputs a signal (second signal) indicating the driving state of the radiation detector 104. The radiation detector 104 changes the driving state of the radiation detector 104 from a standby state to a state where radiation imaging is possible, for example, according to a third signal. Then, the radiation detector 104 outputs a signal indicating that the radiation detector 104 has received radiation and has made a state of being ready for photographing in response to pressing of the irradiation switch.

  Thereby, since the state transition of the radiation detector 104 can be performed in response to pressing of the irradiation switch, it is not necessary to place the radiation detector 104 in a standby state for a long time, thereby reducing deterioration of the radiation detector. Can do.

  Here, if the generator-side IF 102 is arranged as a circuit in the casing of the irradiation switch 101, there is no need to arrange a unit between the irradiation switch 101 and the connection unit 130. Handling becomes easy. In this case, the acquisition unit 102 a that acquires a signal (first signal) indicating that the switch is pressed, the connection unit 131 that connects to the radiation detector 104, the first signal and the radiation detector 104 The control unit 102b that outputs a specific signal to the radiation generation apparatus via the connection unit 130 in accordance with the second signal is arranged in the switch unit B.

  In addition, the communication state of the irradiation switch 101 can be changed by providing a display unit for displaying the progress of photographing and a display control unit for causing the display unit to display that the second signal has been acquired. This can be easily confirmed from the viewpoint of the photographer having 101.

  The communication between the switch unit B and the photographing apparatus may be performed via a wired cable as shown in the figure, but if the communication is performed wirelessly with the photographing apparatus side IF 103, the cable may be bothered. decrease. In this case, the connection unit 131 is a communication unit that transmits and receives signals wirelessly.

  The communication between the switch unit B and the photographing apparatus may be a dedicated communication using a dedicated line and treating the voltage value as a signal as it is, but the data of 0 and 1 are interpreted by both sides based on a predetermined rule. If command communication is used, it is not necessary to use a dedicated line, and for example, it is useful because communication can be performed on a communication path corresponding to a general communication standard of a wireless LAN.

  Here, the generator-side IF 102 and the imaging apparatus-side IF 103 do not need to be described separately in terms of function, and are synchronization and information exchange interfaces of the imaging system including the radiation generation apparatus 108 and the radiation detector 104. However, depending on the manufacturer, it may or may not be a product, so the generator IF 102 belongs to the radiation generator 108, and the imaging apparatus IF 103 is a unit belonging to the imaging device of the radiation detector 104. For this reason, the portion described as the imaging device side IF 103 and the portion described as the generation device side IF 102 are not significantly different conceptually. For example, in some cases, the connection to the imaging device side IFv 103 is described. However, for the purpose of the present invention, there is a case where it may be connected to the generator side IF 102 with functionally similar contents.

  Now, the switch unit B may be configured to be detachable with a connector 130 or the like, or may be switched whether or not to be connected to the photographing apparatus side IF 103 with an electrical switch. Depending on the purpose of use, the operator attaches or detaches the connector 130 or the connector 131 to use the photographing unit, or uses a plurality of types of photographing device side IF 103 (systems with different interfaces or other manufacturer interfaces). Is possible.

  A case where the switch unit A that does not perform communication with the imaging apparatus side is connected to the radiation generation apparatus 108 will be described with reference to FIG. Instead of the radiation generation control device B, an irradiation switch unit A that does not include the connection portion 131 for connection with the radiation detector 104 can be connected to the connection portion on the radiation generation device 108 side via the connection portion 230.

  The switch unit A has an irradiation switch 201 and outputs a first signal indicating that the irradiation switch has been pressed in response to the pressing. The switch unit A is connected to the radiation generator 108 via the connection unit 230. The output first signal is detected by the control unit 1081, and radiation generation preparation processing such as generation of high pressure and radiation generation processing by the radiation source 107 are performed.

  As the radiation detector 204 used together with the radiation generator 108, for example, a film or CR detector can be used. A digital radiation detector that does not synchronize with the radiation generator 108 can also be used.

  Of course, the radiation imaging system of FIG. 1 can also use a film or CR, or a radiation detector 104 that does not perform synchronization. In this case, according to the setting for operating in the asynchronous mode, the imaging apparatus-side IF 103 is in a state of constantly outputting a signal indicating that radiation imaging is possible. As a result, the generator-side IF 102 acquires such a signal via the imaging device-side connection unit 131, and thus imaging can be performed in the same manner as when performing synchronous imaging.

  In still another example, the illumination switch 101 in FIG. 2 can be configured to be detachable from the imaging apparatus side IF 102. This case can be dealt with by providing the imaging apparatus-side IF 102 with another connection section that is detachably connected to the radiation generation control apparatus B. In this way, it is possible to connect the switch unit A as shown in FIG. 2 directly to the connection part of the radiation generator 108 or to connect to the other connection part of the imaging apparatus side IF 102. . In this case, the imaging apparatus-side IF 102 functions as a relay that connects the switch unit A and the radiation generator 108. This eliminates the need to provide a plurality of irradiation switches.

  Furthermore, in the above-described example, a determination unit that determines which of the radiation generation control device B and the switch unit A is connected to the other connection unit of the radiation generation control device B can be provided. Such a determination unit may be provided as an independent unit, or may be implemented as a function of the control unit 102b. The result of such determination is output to the imaging control unit 105 and the radiation generator 108 via the connection unit 130 and the connection unit 131 and is displayed on the display unit by these display control units. The user can be notified of whether to operate in synchronous mode or asynchronous mode.

  Based on FIG. 3, the structure of the radiation detector 304 which is an example of the radiation detector which concerns on embodiment, and can communicate wirelessly is demonstrated.

  The radiation detector 304 includes each internal unit configured in the figure, and has an FPD 3042. The FPD 3042 includes a combination of a scintillator made of, for example, cesium iodide (CsI) and a two-dimensional photodetector mounted on amorphous silicon (a-Si) or single crystal silicon (Si). Here, by using polysilicon, it is possible to achieve both sensor characteristics and easy planarization. In the two-dimensional photodetector, a plurality of pixels are arranged two-dimensionally in a matrix. Each pixel has a photoelectric conversion element and a switching element for reading out charge, and is connected to a row selection line for selectively turning on the switching element and a column signal line for transferring charge.

  When X-rays enter the scintillator, visible light is emitted to the two-dimensional photodetector, resulting in an X-ray visible light image. Pixels in each row of the two-dimensional photodetector are simultaneously addressed by a line driver 3041 and a row selection line, and an output is output via a column signal line and held in a sample hold circuit 3043. The charge of the pixel output held through the multiplexer 3045 is amplified by the amplifier 3044 and is sequentially converted into a digital value by the A / D converter 3046. Control of these readout operations or imaging operations is performed by a detector control unit 3049 (not shown). Each time reading of the pixels on each row is completed, the line driver 3041 sequentially drives each row on the FPD 3042, and as a result, all the pixels in the FPD 3042 are digitized by the A / D conversion operation. The output of the A / D converter 3046 is temporarily stored in the memory 3047 and output via the wireless communication unit 3048 when requested.

  Before receiving the X-ray irradiation, the two-dimensional photodetector of the FPD 3042 performs a discharge process (initialization process) of dark current accumulated in a photoelectric conversion element or the like. The amount of dark current accumulated in the two-dimensional photodetector is proportional to the time, but if the accumulation speed is high, initialization processing is required immediately before shooting. By discharging dark current at an appropriate timing, an image with sufficient image quality can be obtained. If a reset circuit for discharging charges is mounted on the two-dimensional photodetector, charges can be discharged in a sufficiently short time compared to discharging charges by a normal signal line. The reset instruction is performed in accordance with an instruction from the control unit 3049.

  The battery pack 305 supplies power to all the electrical components constituting the radiation detector 1. Here, when the remaining amount of the battery pack 305 is reduced and it becomes impossible to supply power, the battery pack 305 needs to be replaced. In order to check the remaining amount of the battery pack 305, the battery pack 305 main body or the display unit constituted by LEDs or the like on the photographing unit 1 displays the remaining amount of the battery pack 305 or the remaining amount warning, a buzzer and a speaker. The remaining amount warning using sound by etc. is performed. This can prompt the user to replace the battery pack 305. In order to manage the remaining amount of the battery pack 305, the battery pack 305 is replaced by a dedicated charging system.

  Based on FIG. 4, signals exchanged in the radiation imaging system according to one embodiment will be described.

  In the radiation imaging system according to the embodiment, a two-stage switch can be applied to the irradiation switch 401. Signal 410 of 1st switch 401a (preparation start switch, preparation switch, Prep. Switch) and signal 411 of 2nd switch 401b (exposure [irradiation] switch, Exposure switch, Exp. Switch) are input to generator IF 402 through the cable. The The 1st switch signal 410 in which switch transition should occur first is transmitted to the radiation generation apparatus 108 by the generator IF 402, so that the radiation generation apparatus 108 starts preparation for exposure. In response to the 2nd switch signal 411 being transmitted to the radiation generation apparatus 108 by the generator-side IF 402, the radiation generation apparatus 108 performs exposure after preparation for exposure is completed. In some cases, the operation switch 401 may be configured by two sheet-like switches such as a membrane switch on an operation desk or a push button-like switch such as a keyboard.

  First, the operator prepares for X-ray irradiation by adjusting the radiation detector 404, a subject (not shown), and the radiation source 107. The generator IF 402 and the imaging device IF 403 are in a standby state, and the generator 402 a waits for the first switch signal 410 of the irradiation switch 401 in the generator IF 402. The photographing apparatus IF 403 waits for a 1st switch equivalent signal 41 from the generator IF 402. Thereafter, the 1st switch of the irradiation switch 401 is pressed by the photographer. Since the 1st switch signal 410 is received by the generation apparatus IF 402, the output unit 402 c sends a Prep signal 414 to the radiation generation apparatus 108 along with transmission of the 1st switch equivalent signal 416 to the imaging apparatus IF 403. The reason why the 1st switch equivalent signal 416 is transmitted here is to indicate that the 1st switch signal 410 is not necessarily transmitted, and the 1st switch signal 410 may be transmitted as it is.

  The acquisition unit 402a of the generator-side IF 402 waits for the 2nd switch immediately after the 1st switch equivalent signal 417 is transmitted. Of course, the acquisition unit 402a may wait for the 1st switch signal 410 and the 2nd switch signal 411 in parallel. The imaging apparatus side IF 403 receives the 1st switch equivalent signal 416 and instructs the radiation detector 404 to start the state transition process. Such processing includes various processes such as the start of bias application to the FPD 3032, the start of energization of the processing circuit, the start of idle driving, the start of initialization, and the start of accumulation, and these are under the control of the detector control unit 3049. Done. After instructing the start of the state transition process, the imaging apparatus-side IF 403 immediately moves to a standby state.

  When the 2nd switch 401b is pressed by the operator, the acquisition unit 402a of the generation device IF 402 detects the 2nd switch signal 411 and proceeds to the next process. The generator IF 402 sends a 2nd switch equivalent signal 416 to the imaging apparatus IF 403. The radiation detector 404 side issues an instruction to start imaging unit processing. Depending on the drive control of the radiation detector 404, there is a possibility that various processes such as the start of bias application to the internal detector, the start of energization of the processing circuit, the start of idle driving, the start of initialization, and the start of accumulation may be performed. In response to the transition to the accumulation permission state in such processing, the imaging apparatus-side IF 403 sends out an accumulation permission signal 413 (second signal). When the acquisition unit 402a of the generator-side IF 402 receives the storable signal 413 again, the output unit 402c sends an Exp signal 415. The radiation generator 108 starts irradiation and performs radiography.

  Next, the end of the X-ray exposure is performed by releasing the 2nd switch by the operator, a timeout of the accumulation timer in the radiation detector 404, or in some cases, an exposure end signal from the radiation generator 108 to the radiation detector 404. The image is read out. Depending on the driving contents, reading is periodically performed, and a transition is made to a final X-ray image reading state. Thereafter, the image is transferred from the radiation detector 404 to the imaging control unit 405, and an X-ray image is displayed on the imaging control unit.

  Based on the timing chart of FIG. 5, the state of the signal at the start of imaging will be described. FIG. 5A is a timing chart in the case of using a radiation detector capable of transitioning from an idle state in which periodic charge discharge processing is performed to an image accumulation state in a very short time. In such an embodiment, the irradiation switch 501 has a two-stage switch. Other points are the same as those of the embodiment described with reference to FIG. In the timing chart, reference numeral 573 denotes the driving state of the imaging unit, and 576 denotes the state of the X-ray generator (radiation generator).

  In response to pressing of the 1st switch 501a, the irradiation switch 501 generates a 1st switch signal 571 and is acquired by the acquisition unit 102a. In response to this, the Prep signal 575 is generated by the control unit 102b. In response to the signal, the radiation generator 108 is controlled by the control unit 1081 so that the rotor is raised.

  Thereafter, in response to pressing of the 2nd switch 501b, the irradiation switch 501 generates a 2nd switch signal 572, which is acquired by the acquisition unit 102a. In response to this, the radiation detector 104 transitions from the idle drive to the accumulation state. In response to the completion of the transition to the accumulation state, a storable signal 574 (second signal) is input from the imaging apparatus side IF 103 to the generation apparatus side IF 102. Such a storable signal 574 may be generated by acquiring the state of the detector on the imaging apparatus side IF 103 side or may be generated by the radiation detector 104.

  In response to the input of the accumulable signal 574, an Exp signal 576 is generated by the control unit 102b and output to the radiation generator 108. As a result, the control unit 1081 generates radiation from the radiation source 107, and exposure is started. The generation of radiation is performed for a predetermined time and is terminated under the control of the control unit 1081.

  When the pressing of the 2nd switch 501b is finished, the 2nd switch signal 572 is turned off. In this case, the acquisition unit 102a may acquire the 2nd switch signal 572 in the off state, or may acquire only the signal indicating the on state and may not acquire the signal in the off state.

  After the 2nd switch signal 572 is turned off or after the predetermined accumulation time is ended, the radiation detector 104 ends the accumulation state and starts to read out charges. After reading is completed, the state transitions to the idle state again. The radiographic image based on the read electric charge is transferred from the radiation detector 104 to the control unit 105 and subjected to predetermined image processing and displayed on the display unit.

  FIG. 5B is a timing chart in the case of using a radiation detector that performs initialization processing when transitioning from the idle state to the accumulation state. The description of the signals exchanged with those in FIG. 5 (a) is omitted.

  In such an embodiment, the FPD 3042 is shifted from the idle state to the initialization process in response to reception of the 2nd switch signal 572 by the imaging control unit 105 or the radiation detector 104. The initialization process here starts the same process as the periodic charge discharge process performed in the idle state with the reception of the 2nd switch signal 572 as a trigger.

  In another example, in consideration of the responsiveness to the 2nd switch signal 572, when the read time is shortened compared to the initialization process in the idle state, or when the charge discharge process is repeated a plurality of times, one unit of discharge process is performed. Or reduce the time interval between. The reading time can be shortened by shortening the time for which the switching element connected to each photoelectric conversion element of the FPD 3042 is turned on.

  In another example, in consideration of the image quality of an image obtained by exposure, the switching element is turned on longer than the initialization process in the idle state, or the charge discharge process is repeated in the idle state. By increasing the number more than the initialization process, the charges are discharged more reliably. Even in this case, the responsiveness can be improved by reducing the time interval between the discharge processes of one unit. The above-described control is realized by sending a signal to the FPD 3042 by the detector control unit 3049.

  The radiation detector 104 shifts to the accumulation state in accordance with the end of the initialization process. In response to the shift, the radiation detector 104 transmits a storable signal 574 (second signal) to the radiation generator 108 side. In response to this, an Exp signal 576 is generated by the control unit 102b of the generator IF 102, and is input to the radiation generator 108 by the output unit 102c.

  By the exchange of signals as described above, the imaging apparatus including the radiation detector 104 and the radiation generation apparatus 108 are synchronized, and radiation imaging is performed.

  Note that the control for realizing the exchange of signals shown in the timing chart shown in FIG. 5A and the control for realizing the exchange of signals shown in the timing chart of FIG. The imaging apparatus-side IF 103, the radiation detector 104, and the radiation imaging apparatus 105 can each execute, and one of the controls is executed depending on which radiation detector 104 is connected to the system.

  Hereinafter, an embodiment having another system configuration will be described.

  FIG. 6 shows an example in which the operation switch 601 is arranged in the photographing apparatus side IF 603. Descriptions of functions and configurations common to the above-described embodiment are omitted. The acquisition unit 603a, the control unit 603b, and the output unit 603c perform the same processing as the acquisition unit 102a, control unit 102b, and output unit 102c, respectively.

Although it is possible to delete the generator IF 602 and connect the radiation generator 108 directly, considering the case of connecting and using units manufactured by different manufacturers, the generator IF 602 converts the connector shape. And insulation treatment to ensure safety. In this case, the generator IF 602 functions as a relay,
The shape of the connecting portion 631 of the generator-side IF 602 is intentionally made a connector different from that of the radiation generating device, so that a general operation switch is directly connected to the generator-side IF 602 supplied by the radiation generator manufacturer. Can be suppressed. In addition, the insulation processing uses an optical element such as a photocoupler or electromagnetic coupling by a coil for the signal of the operation switch 601 permitted to be connected. In some cases, when power cannot be supplied from the radiation generator 108 to the generator IF 602 from the radiation generator 108, power is supplied from the imaging apparatus IF 603 to the generator IF 602 via the insulated power supply, including the previous insulating element. May be.

  The switch unit B in FIG. 1, the switch unit A in FIG. 2, and the switch unit C in FIG.

  The types of signals to be exchanged are the same as those shown in FIGS.

  A radiation imaging system according to another embodiment will be described with reference to FIG. In such an embodiment, a signal indicating that the illumination switch has been converted to Europe is only monitored, and no storable signal is returned from the imaging apparatus side. For this reason, the communication between the generator-side IF 733 and the imaging device-side IF 703 is unidirectional. The signal transmission path may be wired, but by using wireless, the cable is not bothered during shooting and the shooting efficiency is improved. A signal is transmitted from the generation apparatus side IF 733 to the imaging apparatus side IF 703. According to such a configuration, the generator unit IF 733 can be omitted from the reception unit that receives from the imaging device side IF 703 and the control for processing the received signal, and thus the configuration of the control unit 702b and the generator unit IF 733 is configured. It can be simplified.

  In addition, the irradiation switch 701 is a remote controller that transmits a signal via radio. The irradiation switch 701 includes a wireless transmission unit that wirelessly transmits a signal (first signal) generated in response to pressing of the first switch 701a and the second switch 701b. For example, an infrared transmission unit can be used as the wireless transmission unit. In this case, the acquisition unit 733 functions as a reception unit that receives a signal (first signal) output as a radio signal. Since the digital radiation detector and the radiation imaging apparatus can be imaged synchronously with a simple configuration using the remote control type irradiation switch 701, imaging can be performed without bothering with the cable.

  The present embodiment is a conceptual diagram for monitoring an operation switch signal without major modification. For example, the acquisition unit 702a monitors the electromagnetic field of each single line related to the first switch signal 711 and the second switch signal 712 with respect to the cable from the irradiation switch 701 to the radiation generation apparatus 108. A switch signal is transmitted to the imaging apparatus side IF 733. At that time, after the acquisition unit 702a performs processing such as removing the outer covering of the cable double covering of the target signal and exposing the single line of the target signal line when the single wire of the connection is not ready to be taken out in advance. In some cases, a signal is detected in a hall element or a coil. In other embodiments, the generator-side IF 733 monitors the magnetic field due to the high-voltage current generated by the high-voltage generator 106, and detects the pressing state of the irradiation switch 701 using, for example, a pressure sensor attached to the irradiation switch 701. The relative position of each operation switch (1st switch or 2nd switch) of the irradiation switch 701 is monitored.

  The generator IF 733 communicates wirelessly with the control unit 1081 of the radiation generator 108. In this case, the output unit 702c functions as a wireless communication unit that outputs a wireless signal. The control unit 702b outputs a signal for instructing the radiation generation apparatus 108 to irradiate radiation via the output unit 702c. The generation device side connection unit 730 functions as a wireless communication unit that transmits and receives signals from the radiation generation device 108. This can also be realized by connecting an infrared transceiver to the connector 130 in the above-described embodiment.

  Thus, the arrangement of the irradiation switch 701, the generator IF 733, and the radiation generator 108 can be changed according to the situation without being bothered by the cable. Can do.

  The generator IF 733 may be provided from the manufacturer on the photographing apparatus side as an expansion unit of the photographing apparatus IF 703. In this way, there is a merit that the radiation generator 108 side does not need to be greatly modified, and that synchronous imaging by the digital radiation detector 704 is possible with a simple configuration.

  FIG. 8 is an example of another embodiment, and is an example in which an infrared splitter 833d that divides an infrared signal is provided in the generator IF 833 with respect to the embodiment shown in FIG. The infrared splitter 833d functions as a dividing unit that divides the acquired signal (first signal) from the irradiation switch 801 by partially reflecting it to obtain a reflected signal (third signal). Furthermore, it functions as an output unit that outputs the divided signal (third signal) as a signal for causing the radiation detector 804 to transition to a state in which radiation detection is possible.

  This is a case where the irradiation switch 801 is a remote controller, here an infrared remote controller. In this case, the generator-side IF 833 receives the infrared signal from the irradiation switch 801 almost simultaneously with the radiation generator 108. The simultaneity here is not strict. If the imaging apparatus side IF 803 having an infrared receiving unit is simply arranged in a space without a clear intention, only one of the radiation generator 108 side and the radiation detector 804 side receives and the other does not receive both. Therefore, the generator IF 833 is disposed at the same position as the infrared receiver 840 of the radiation generator 108 or at a position close thereto. Furthermore, the imaging apparatus side IF 803 is disposed close to the generation apparatus side IF 833 and is positioned so as to cover the remote control signal so as not to reach the infrared reception unit 840 of the radiation generation apparatus 108. In this example, the infrared signal is split by the infrared splitter 833d while the infrared receiver 840 is covered by the generator IF 833, transmitted and transmitted to the infrared receiver 840, and a part of the infrared signal is transmitted to the imaging apparatus IF 803. By transmitting in the arrangement direction, the 1st switch signal and the 2nd switch signal are output to the photographing apparatus side.

  As a result, the radio remote control type irradiation switch 801 is used, and a simple configuration using an infrared splitter reduces the modification on the generator side, thereby enabling synchronous imaging.

  Based on the timing chart of FIG. 9, signal exchange in the radiation imaging system in the case of performing one-way communication as shown in FIGS. 7 and 8 will be described.

  Note that the description of the timing chart in FIG. 5 described above may be omitted. FIG. 9A shows a radiation detector capable of transitioning from an idle state in which periodic charge discharge processing is performed to an image storage state without performing initialization processing in a very short time, as in FIG. 5A. It is a timing chart at the time of using. Hereinafter, the radiation imaging system according to the embodiment shown in FIG. 7 will be described as an example.

  The control unit 702b of the generator-side IF 733 causes the radiation generator 108 to output a signal 971 generated when the first switch 701a is pressed via the wireless communication unit, and presses the second switch 701b. A signal 972 generated accordingly is output to both the radiation detector 704 and the radiation generator 108.

  First, the acquisition unit 102a acquires a first signal indicating that the irradiation switch 701 has been pressed. The first signal here includes a 1st switch signal 971 generated in response to pressing of the 1st switch 701a (first switch) included in the irradiation switch, and a press of 2nd switch 701b (second switch). A 2nd switch signal 972 generated accordingly is included. The acquisition unit 702a acquires and identifies the 1st switch signal 971 and the 2nd switch signal 972 of the irradiation switch 701. In response to pressing of the 1st switch signal 971, a Prep signal 975 is generated by the control unit 702b, which is wirelessly transmitted to the generation device control unit 1081, and the radiation generation device 108 is rotor-up and performs radiation generation preparation processing. Here, when the infrared splitter 833d shown in FIG. 8 is used, the Prep signal 975 is the same signal as the 1st switch signal 971, and no delay other than the delay related to signal transmission occurs.

  In such an embodiment, when the rotor up of the radiation generator 108 is completed and preparation for generation of radiation is completed, a display for displaying a state related to at least one of the generator IF 733 and the radiation generator 108 It is desirable to provide a control unit. The display unit may be in at least one of the generator-side IF 733 and the radiation generator 108. For example, the display unit is generated by being provided at an easy-to-see position such as the vicinity of the radiation source 107 of the radiation generator 108 or by being provided at a plurality of positions. The status of the device can be confirmed. Thus, it is desirable for the photographer to press the 2nd switch 901b while looking at the state of the generator. By doing so, it is possible to reduce adverse effects on the image quality caused by the radiation detector 704 having a long accumulation time.

  First, the generator-side IF 733 causes the output unit 702c to output the signal to the radiation detector 704 in response to the acquisition of the 2nd switch signal 972. Even if the signal output here is the 2nd switch signal 972 itself, the control unit 702b may generate a signal modified to be interpreted by the photographing apparatus. The 2nd switch signal 972 is treated as a signal for causing the radiation detector 704 to transition to a state where radiation detection is possible. In response to the acquisition of the 2nd switch signal 972, the radiation detector 704 transitions from the idle state to the accumulation state.

  Further, the generator-side IF 733 causes the output unit 702 c to output an Exp signal to the radiation generator 708 in response to the acquisition of the 2nd switch signal 972. In response to the control unit 1081 receiving the Exp signal, the radiation generation apparatus 108 generates radiation.

  The radiation detector 704 in the accumulation state detects the generated radiation and accumulates electric charges. Thereafter, the radiation detector 704 terminates the accumulation process, and performs a readout process for reading out charges from the FPD 3042 to obtain radiation image data.

  In this way, synchronous imaging is possible even when the radiation generation control device and the imaging device perform one-way communication.

  FIG. 9B shows a radiation detector after a signal 972 indicating that the 2nd switch 701b has been pressed reaches the radiation detector 704 when transitioning from the idle state to the accumulation state, as in FIG. 5B. 704 is a timing chart when an initialization process is required.

  If there is no storable signal 974, the generator IF 733 or, depending on the configuration, the imaging apparatus IF 703 generates the 2nd switch signal 972, and then outputs the Exp signal 976 with a delay time longer than the initialization time. . As a result, synchronous shooting is possible even in the case of one-way communication.

  In this way, it is possible to perform X-ray imaging without the accumulable signal 974, but when the radiation detector 704 receives the 1st switch signal 971 for some reason and cannot transition to the accumulable state in the first place, for example, patient information When there is no input, there is some abnormality in the radiation detector or the like, or when the imaging control unit 705 cannot receive the radiation image, there may be a case where the X-ray imaging cannot be stopped. Therefore, a display control unit that displays on the display unit whether the radiation detector 704 or the imaging apparatus is in a state in which the imaging apparatus can transition to the accumulation state is provided in at least one of the imaging apparatus-side IF 704 and the imaging control unit 705. The display unit is also provided in one or both of the imaging apparatus side IF 704 and the imaging control unit 705, so that the radiographer is notified of the state of the radiation detector, and the possibility of invalid exposure can be reduced. Here, information indicating that the radiation detector is in the accumulation state can be displayed on the display control unit that displays the radiation image on the display unit in the imaging control unit 705.

  One embodiment using an irradiation switch that outputs signals wirelessly will be described with reference to FIG. In this embodiment, communication between the radiation generation control device and the imaging device is bidirectional. Further, the radiation generation apparatus 108 includes a wired connection unit 1040a configured by a connector and the like, and a wireless connection unit 1040b configured by an infrared transmission / reception unit, for example.

  The irradiation switch 1001 is configured by an infrared remote controller or the like.

  Here, the generator-side IF 1033 includes a reception unit 1002a that receives an infrared signal from the irradiation switch 1001, a communication unit 1002c that transmits and receives a signal, and a transmission unit 1002d. This corresponds to the acquisition unit 102a and the output unit 102c in the above-described embodiment. The control unit 1002b has the same function as the control unit 102b according to the above-described embodiment. Furthermore, the generator-side IF 1033 includes a shielding member 1002e.

  The communication unit 1002c exchanges signals with the photographing apparatus side IF 1003 by infrared rays, wireless LAN or other wired connection.

  The receiving unit 1002a and the transmitting unit 1002d exchange signals with the wireless connection unit 1040b of the radiation generating apparatus 108, for example, using infrared rays.

  The shielding member 1002e shields radio signal reception by the radio communication unit of the radiation generator 108. An acquisition unit (reception unit 1002a) is disposed outside the shielding by the shielding member 1002e. Inside the shielding by the shielding member 1002e, a second transmission unit 1002d that outputs a specific signal to the wireless communication unit of the radiation generation apparatus 108 according to control by the control unit 1002b is arranged.

  The control unit 1002b is connected as a circuit so that electrical signals can be exchanged with the reception unit 1002a, the communication unit 1002c, and the transmission unit 1002d. In response to the communication unit 1002c receiving a signal (second signal) indicating that the radiation detector 1004 is in a state where radiation detection is possible, the control unit 1002b transmits a transmission unit 1002d that functions as a wireless communication unit. Via which the radiation generator 108 outputs a signal for instructing radiation irradiation.

  The generator IF 1033 is disposed so as to cover the wireless transmission unit 1040b, and is disposed so as to be close to the second transmission unit 1002d. Furthermore, the second transmitter 1002d is shielded by the shielding member 1002e. The shielding member 1002e prevents the signal from the irradiation switch 1001 from reaching the wireless connection unit 1040b directly, and the signal from the irradiation switch (first signal) reaches only one of the radiation generator 108 and the imaging device. Therefore, the possibility that synchronization is not performed can be reduced. The signal (first signal) of the irradiation switch 1001 can be directly received only by the receiver 1002a of the generator IF 1033. The arrangement of the generator-side IF 1033 with respect to the radiation generator 108 may be fixed by an attached fixing member.

  The generator-side IF 1033 receives the signal (first signal) at the receiving unit 1002a, and then generates an infrared signal at the transmitting unit 1002c. Here, if the transmission unit 1002c is connected to the imaging apparatus side IF 1003 by wire, the transmission reliability can be improved as compared with the case of wireless communication.

  Further, the generator-side IF 1033 transmits the signal of the irradiation switch 1001 to the wireless connection unit 1040b by the second transmission unit 1002d. As another configuration, instead of the irradiation switch 1001, in some cases, infrared transmission / reception is performed with the imaging apparatus-side IF unit 1033 and the wireless connection unit 1040b, and not only the irradiation switch signal but also setting information regarding imaging. It can be used for exchanging implementation information after shooting.

  Based on the timing chart of FIG. 11, signal exchange in the radiation imaging system according to the embodiment will be described. In the embodiment of FIG. 11A, the radiation detector is shifted to the accumulation state in response to the first switch 1011a being pressed. The radiation imaging system according to the embodiment shown in FIG. 10 will be described as an example. However, a two-stage switch type irradiation switch 1011 is used as the irradiation switch. In addition, the description of the parts that overlap with the timing charts of FIGS. 5 and 9 may be omitted.

  The receiving unit 1002a receives a 1st switch signal 1171 output in response to pressing of the 1st switch 1101a. In response to reception of the signal 1171 from the 1st switch 1101a (first switch), the control unit 1002b causes the communication unit 1002c to output a signal for causing the radiation detector 1004 to transition to a state in which radiation detection is possible. In this embodiment, the signal output from the communication unit 1002c is directly output as the 1st switch signal 1171.

  The detector control unit 3049 of the radiation detector 1004 sequentially repeats the discharge of electric charges and the accumulation state in response to reception of a signal from the radiation generation control device. And the radio | wireless communication part 3048 of a radiation detector outputs the signal (2nd signal) which shows that the radiation detector 1004 became the state which can detect radiation according to changing to an accumulation | storage state. Function as. Here, the radiation detector 1004 needs to perform an initialization process periodically because a dark current component accumulates in the photoelectric conversion element when the accumulation state is continued. Therefore, the detector control unit 3049 turns off the accumulable signal 1174 immediately before the accumulation time ends, and causes the wireless transmission unit 3048 to stop outputting the accumulable signal 1174 (second signal). Alternatively, a signal indicating the off state may be transmitted. This accumulation time is set on the basis that an image with sufficient image quality can be obtained no matter what timing the X-rays are irradiated.

  The control unit 1002b receives a signal generated in response to the pressing of the second switch 1101b and a storable signal 1174 (second signal) indicating that the radiation detector 1004 is in a radiation detectable state. In response to the reception of 1002a, the transmitter 1002d outputs an Exp signal 1176, which is a signal for instructing the radiation generation apparatus 108 to irradiate the radiation.

  Once the 1st switch signal 1171 is input from the generator side, accumulation and initialization are repeated until the 2nd switch signal 1172 is pressed, and an accumulable signal 1174 is returned during the accumulation state. When the accumulable signal 1174 and the 2nd switch 1101b are pressed and the 2nd switch signal 1172 is simultaneously received by the receiving unit 1002a, the control unit 1002b generates an Exp signal 1176. If the 2nd switch 1101b is pressed during the initialization process, the initialization process of the radiation detector 1004 is completed, the storage state is entered, and an accumulation enable signal 1174 is output. The Exp signal 1176 is generated in response to reception by the receiving unit 1002a. In this way, the signal immediately before exposure is reduced by reducing the transmission / reception of signals on the generator side and the imaging apparatus side after the 2nd switch is pressed, and making the transmission unilateral from the imaging apparatus side. Interaction can be reduced.

  In this case, by providing a display unit for displaying the storage state of the radiation detector 1004 on the imaging control unit 1005, the generation apparatus side IF 1033, and the imaging apparatus side IF 1003, and a display control unit for display, the user can avoid the initialization process. It becomes easy to measure the shooting timing. In addition, since the display control unit such as the imaging control unit 1005 displays the time until the accumulation state of the radiation detector ends in a countdown manner, it is easy for the photographer to know when the accumulation ends. Furthermore, it becomes easier to measure the timing of shooting.

  In addition, when the radiation detector 1204 performs the driving for repeating the initialization and the accumulation time in the idle state, the driving is as shown in FIG. Here, when the initialization and the accumulation time are repeated even in the idle state, the detection is performed so that the accumulation time is shortened before the 1st switch signal 1171 is triggered in consideration of the stability of the image quality of the sensor. It can be controlled by the device controller 3049. Further, by controlling the detector control unit 3049 so that the accumulation time is longer before the 1st switch signal 1171 is triggered than when the 1st switch signal 1171 is triggered, the ON / OFF cycle of the switching element can be lengthened. Therefore, the deterioration of the FPD 3042 can be delayed and the useful life can be extended.

  FIG. 11B shows the radiation after the signal 972 indicating that the 2nd switch 1101b has been pressed reaches the radiation detector 1004 when transitioning from the idle state to the accumulation state as in FIG. 10 is a timing chart when an initialization process is required for the detector 1004. In FIG. 11B, in response to the 1st switch signal 1171 being triggered, the radiation detector 1004 starts outputting the accumulable signal 1174 to the generator side while remaining in the idle state. The display control unit of the imaging control unit causes the display unit to display a display indicating that a storable signal is being output. As a result, the photographer can measure the photographing timing.

  Based on FIG. 12, a configuration of a control device 1203 that is another embodiment of the imaging device-side IF according to the embodiment will be described. The description of the configuration common to the previous embodiment may be omitted. The reception unit 1202a, the control unit 1202b, and the transmission unit 1202c of the generator-side IF 1202 have the same functions as, for example, the acquisition unit 102a, the control unit 102b, and the output unit 102c in the embodiment illustrated in FIG.

  The control device 1203 functions as an imaging device side IF that synchronizes with the radiation generation device, as in the above-described embodiment. In addition, the radiation detector 1204 functions as a check-in device that transmits communication parameters for establishing communication so that the radiation detector 1204 can be used in the radiation imaging system. Control of each unit of the control device 1203 is performed by the control unit 1250 in an integrated manner.

  The control device 1203 includes a first wireless communication unit 1245 that wirelessly receives a request for wireless communication parameters from the radiation detector 1204. The first wireless communication unit 1245 also functions as a transmission unit that wirelessly transmits wireless communication parameters to the radiation detector 1204.

  The imaging control unit 1205 and the radiation detector 1204 establish a connection based on wireless parameters received from the control device 1203.

  Communication between the control device 1203 and the imaging control unit 1205 is established in advance by the second wireless communication unit 1247, for example. The establishment of communication here includes, for example, a process of controlling so that information can be exchanged with each other with a common ID when a wireless LAN is used for communication. For example, the first wireless communication unit 1245 establishes communication between the control device 1203 and the generator-side IF 1205 in advance. The establishment of the communication here is, for example, when infrared rays are used for communication, the infrared light emission patterns output from the connection unit 1231 of the generator IF 1202 and the first wireless communication unit 1245 are stored in the respective reception units. Including processing to keep. Or processing which adds ID which shows that it is a signal from a mutual apparatus to an infrared signal can also be included.

  As a result, the connection between the radiation detector 1204 and the second wireless communication unit 1247 is established via the imaging control unit 1205.

  As a result, the radiation detector 1204 is registered in the radiation imaging system, and the radiation detector 1204 can be used in the system.

  The first wireless communication unit 1245 receives, for example, infrared signals and transmits wireless LAN communication parameters using infrared rays. This function is used for setting the wireless communication before the radiation detector 1204 establishes wireless communication (usually wireless LAN communication) with other methods with the imaging control unit 1205, and also detects other radiation detectors. It is used for work for additionally registering in addition to or in place of the device 1204.

  The control device 1203 also includes a second wireless communication unit 1247 that functions as a second wireless reception unit and a second wireless transmission unit that communicate with the radiation detector 1204 using wireless parameters. The wireless communication unit 1247 includes, for example, a communication module and an antenna that can perform communication using a wireless LAN.

  The control device 1203 realizes synchronous imaging with the radiation generating device side by the first and second communication units used for the check-in and communication with the radiation detector 104. That is, the first wireless communication unit 1245 receives from the generator-side IF 1202 a signal indicating that the irradiation switch 1201 (imaging instruction switch) has been pressed. The second wireless communication unit 1247 functioning as the second wireless transmission unit transmits a signal for causing the radiation detector 1204 to transition to a state in which radiation detection is possible. The second wireless communication unit 1247 functioning as the second wireless reception unit receives a signal indicating that the radiation detector 1204 is in a state where radiation detection is possible. The first wireless communication unit 1245 functioning as the first wireless transmission unit transmits a signal indicating that the radiation detector 1204 is in a detectable state to the generator-side IF 1202. Here, the radiation generation control device includes a generator-side IF 1202 and, in some cases, an irradiation switch 1202.

  In this way, by using the first wireless communication unit 1245 used for check-in also for synchronous imaging, synchronous imaging by the radiation detector 1204 that performs wireless communication with a simple configuration becomes possible. In addition, since the connection between the radiation detector 1204 and the generator IF 1202 is configured as a wireless connection, the arrangement of each unit is not bothered by a cable, which is useful. Of course, in addition to the first wireless communication unit 1245, an infrared transmission / reception unit 1246 may be further provided, and the infrared transmission / reception unit 1246 may be used as a communication unit for synchronous photographing.

  Here, a two-stage switch in which the irradiation switch 1201 includes a 1st switch 1201a and a 2nd switch 1201b can be applied. In this case, the first wireless communication unit 1245 includes a signal 1210 generated in response to pressing of the first switch 1201a (first switch) of the irradiation switch 1201 (imaging instruction switch) and the irradiation switch 1201 (imaging instruction switch). And a signal 1211 generated in response to pressing of the 2nd switch 1201b (second switch). As a control flow in this case, for example, the control shown in the timing chart of FIG. 11 can be applied. That is, the radiation detector 1204 periodically repeats initialization processing and accumulation from the idle state according to the signal 1210, and the radiation detector 1204 transmits the accumulation enable signal 1174 wirelessly only during the accumulation state. The transmission from the unit 3048 is continued.

  Further, the control device 1203 can connect a photographing device switch 1233 (other photographing instruction switch) with a connector 1223. The photographing device switch 1233 is provided in response to a situation where synchronous photographing cannot be performed, for example, communication with the generation device cannot be performed properly, and is generated in response to the photographing device switch 1233 being pressed. The control unit 1250 obtains a signal indicating that the photographing device switch 1233 has been pressed. Thereafter, the control unit 1250 outputs an instruction to cause the radiation detector 1204 to transition from the idle state to the accumulation state.

  Here, the first wireless communication unit 1245 used for check-in is used for synchronous imaging, and is also used for receiving parameters related to radiation generated by the radiation generation apparatus 108 from the radiation control apparatus after exposure. it can. The radiation generation control device 1081 sends radiation generation execution information such as tube voltage, tube current, and mAs value to the generator IF 1202 via the infrared transmitter / receiver 1230 after the exposure, and the generator IF 1202 sends the first wireless communication unit. Implementation information is sent to 1245 by, for example, infrared rays. If the control unit 1250 of the control device 1203 further transmits the execution information to the imaging control unit 1205 via the second wireless communication unit 1247, the radiographic image data obtained from the radiation detector 1205 by the imaging control unit 1205 In association with implementation information, it can be used for various image processing.

  The control device 1203 does not need to be directly connected to the imaging control unit 1205, and is directly connected to the radiation detector 1204 or indirectly via an access point. In one embodiment, the control device 1203 is wired to the generator-side IF 1202 via the connection line 1225. In addition, the imaging control unit 1205 is connected via a connection line 1226. When the control device 1203 and the generator-side IF 1202 are arranged close to each other, it is possible to ensure the stability and reliability of communication without reducing convenience by using a wired connection. . In addition to communication, power supply is performed via the connection lines 1225 and 1226 by using a wired connection, whereby a highly reliable system can be obtained.

  When wireless is used for communication, a battery is provided as a power source for the control device 1203 and the generator-side IF 1202. As a connection method, a wired system can be constructed more simply than a dedicated line by using a general-purpose interface capable of command communication such as RS232C or USB. For wireless communication, a wireless LAN standard, Bluetooth (registered trademark), or general-purpose such as IrDA communication using infrared rays, and of course, a custom interface with an original communication rule added thereto may be used. If the connection line 1226 to the imaging control device 1205 is a USB (Universal Serial Bus) that serves both as a general-purpose communication interface and a power supply path, the versatility is high and command communication can be easily performed, and power can be supplied from the imaging control unit 1205. Therefore, convenience can be improved.

  In addition, the control device 1203 can be provided with an LED 1227 that displays a plurality of states such as a storage possible state of the radiation detector 1204 and a battery state. In this case, the LED 1227 is turned on in response to the control of the control unit 1250 in response to the radiation detector 1204 being in the accumulation state. Alternatively, a display can be provided instead of the LED. Alternatively, a sound source 1206 is installed to notify the state of the photographing unit. Control regarding these notifications is performed by the control unit 1250.

  Alternatively, an informing unit for informing the state of the radiation detector 1204 can be arranged in the housing of the irradiation switch 1201 that is taken by the photographer during exposure, and the state of the detector can be informed easily by the person taking the image. . The place to be placed is used in a state where it is held in the hand, so it is not suitable to hold it with your hand or press it with your finger. Furthermore, considering the use with your right hand and left hand, the upper surface around the switch of the irradiation switch 1201 lights up. It is desirable to make it so.

  It is also possible to configure the control device 1203 as a unit equipped with an interface that can handle a plurality of the above-described embodiments. In this case, the system operation including the radiation detector 1204 is switched depending on the setting. The control unit 1250 that controls all of these switching operations may be configured to control all of them, or simply configures mainly the fence conversion, and the main control is performed in the imaging control unit 1205 or radiation detection. All or part of the control can be left to the control unit 3049 in the device 1204.

  Here, the operation when the irradiation switch 1203 is an infrared remote controller will be described. The infrared remote controller of the irradiation switch 1201 may be connected to the control device 1203 through a wired connection. Further, the control device 1203 is configured integrally with the generator-side IF 1202.

  First, the light emission pattern (1st switch signal 1211, 2nd switch signal 1212, collimator light lighting signal, etc.) of the infrared remote controller for the radiation generator 108 is stored in the control device 1203 or the imaging control unit 1205 via the wireless receiver 1245. Let Next, the infrared transmission unit 1246 is arranged to face the infrared reception unit 1230. At this time, the infrared receiver 1230 may be completely covered with a unit including the control device 1203 so that it cannot be operated by another infrared remote controller. On the contrary, in order to make full use of the operation of the irradiation switch 1203 of the infrared unit of the radiation generator 108, the infrared receiving unit 1230 can be actively operated so that the irradiation switch 1201 to be used can be operated freely without switching operation. You may arrange | position so that an opening part may not be disturbed as much as possible. Next, it removes from the wired irradiation switch 1201 of the radiation generator 108, or prepares another similar new irradiation switch 1233, and attaches it to the control apparatus 1203 via the connection part 1223. FIG. Next, when the operator activates the entire system and presses the 1st switch of the irradiation switch 1201 attached to the control device 1203, the prep signal 1214 is notified from the previous wireless transmission unit 1246 to the infrared light receiving unit 1230 by infrared rays. At the same time, the radiation detector 1204 is prepared if necessary. Furthermore, after the operator depresses the 2nd switch and the radiation detector 1204 prepares, the infrared signal 1246 notifies the infrared light receiving unit 1230 of the Exp signal 1215 by infrared rays. Further, in this configuration, when the operator operates the irradiation switch 1201, the radiation detector 1204 and the image acquisition system of the imaging control unit 1205 have some reason (patient information is not input / power supply is not activated. ), An infrared signal is not emitted from the infrared transmitter 1246, so that an event of unnecessary X-ray irradiation can be reduced.

  In addition, functions such as a USB extended HUB function and a bar code reader may be installed for data exchange at the time of medical examination. When communication in one direction is performed as in the embodiment of FIGS. 7 and 8, communication with the radiation detector 1204 may be configured using only the wireless transmission unit 1246.

  A switch 1233 by wired connection is connected to the control device 1203, and the radiation detector 1204 can be used as a trigger switch for shifting to the accumulation state in response to pressing of the switch. In this case, there is an advantage that X-rays are not accidentally irradiated when the preparation for accumulation in the radiation detector 1204 is not arranged for any reason regardless of the operator's attention or carelessness.

  Further, when actually operated in a hospital or the like, the radiation 1204, the imaging control unit 1205, and the control device 1203 may not be installed in advance on the mobile radiation generator 108. In this case, every time it is used, the radiation detector 1204 and the imaging control unit 1205 and, in some cases, the control device 1203 are placed on or attached to the mobile radiation generator 108. In particular, considering that the handling of the cable portion is likely to be complicated, the control device 1203 is provided with a suction cup and a hold function so that the work can be stably performed when the cable is inserted and removed.

  Based on FIG. 13, an embodiment of a radiation imaging system provided with a switch different from the irradiation switch will be described. In FIG. 13, the expansion unit 1333 of the imaging apparatus side IF unit 1303 has an independent switch, and is attached so that the expansion unit 1333 covers the irradiation switch 1301. When the expansion unit 1333 is provided with a switch, it is arranged so that the timing at which the operator operates the 2nd switch of the irradiation switch 1301 can be detected almost simultaneously. For example, an operation button in the middle of the repulsive force between the 1st switch and the 2nd switch may be placed on the irradiation switch 1301 so that it is pressed almost simultaneously with the 2nd switch. Further, when the radiation detector 704 is not ready for imaging, an interlock mechanism may be provided so that the irradiation switch 1301 cannot be pushed. Now, when the photographing apparatus side IF 1303 is arranged in the irradiation switch 1301 in this way, the wiring is doubled and handling becomes inconvenient. For this reason, since the normal irradiation switch 1301 is a curled cable, it may be wound around the curled cable, or may be a winding type cable configuration in which the cable exposed portion automatically expands and contracts.

  FIG. 14 shows another example of the embodiment of the expansion unit 1333 of FIG.

  In the radiation generation control apparatus having the irradiation switch 1401 and the expansion unit 1433 including a storage switch, the first switch (first switch) 1401a of the irradiation switch 1401 is a signal for instructing the radiation generation apparatus 108 to prepare for radiation generation ( 1st switch signal, Prep signal) 1310 is output. The 2nd switch 1401b (second switch) of the irradiation switch 1401 outputs a signal (2nd switch signal, Exp signal) 1311 to instruct radiation irradiation. The expansion unit 1433 includes an interlock unit 1455 that functions as a restricting unit that restricts pressing of the 2nd switch 1401b. In addition, an acquisition unit 1402a and an output unit 1402c functioning as a communication unit communicating with the radiation detector 1404 are provided. In addition, the control unit 1402b is configured to release the restriction by the restriction unit in response to receiving a signal indicating that the radiation detector 1404 is in a radiation detectable state via the communication unit. The radiation generation control apparatus further includes a storage switch 1409 (third switch), and the output unit 1402c shifts the radiation detector 1404 to a state in which radiation detection is possible in response to pressing of the storage switch 1409. Send the signal.

  Here, by modifying the configuration of FIG. 14, the storage switch 1409 can be arranged to cover at least one of the first switch 1401a or the second switch 1401b. In this case, for example, the accumulation switch 1409 is pressed in response to pressing of the 1st switch 1401a, or the storage switch 1409 is pressed in response to pressing of the 2nd switch 1401b. As a result, the operator can reliably instruct the radiation detector 1401a with the same operability as when operating the irradiation switch 1401.

  Further, the accumulation switch 1409 is arranged so as to cover the 2nd switch 1401b, and the magnitude of the force required to depress the accumulation switch 1409 is the magnitude of the force necessary to depress the first switch 1401a and the force necessary to depress the 2nd switch 1401b. The switch member is selected so as to generate a repulsive force that is between the two. As a result, the storage switch 1409 can be pressed in the middle of the operation of pressing the 2nd switch after the 1st switch is pressed.

  Further, as shown in FIG. 14, the accumulation switch 1409 can be arranged so that the pressing direction is different from that of the first switch 1401a and the second switch 1401b. Thereby, it is possible to reduce the possibility that the irradiation switch 1401 and the accumulation switch 1409 are pushed incorrectly.

  By providing a display unit in the irradiation switch 1401 or the expansion unit 1433, the state of the radiation detector 1404 can be displayed in an easy-to-understand manner for the operator. In this case, the control unit 1402b of the expansion unit 1433 performs display control to display on the display unit a display indicating that the acquisition unit 1402b has received a signal indicating that the radiation detector 1404 is ready to detect radiation. .

  In addition, the expansion unit 1433 functions as a holding unit that holds the interlock unit 1455 that functions as a restriction unit. Furthermore, an attachment jig 1435 that functions as a fixing portion for fixing the expansion unit 1433 to the irradiation switch 1401 is provided.

  Here, the part where the expansion unit 1433 of the photographing apparatus side IF 1403 is switched will be described as a storage switch 1409. The accumulation switch 1409 includes a housing (weight, size) that can be held in the hand, at least one switch (push button, membrane switch, etc.) for giving instructions to the radiation detector 1404, and the imaging apparatus side IF 1403, or It consists of a cable or a wireless communication unit for connection with the subsequent radiation detector 1404 system. The switch 1409 issues an instruction directly related to driving in the radiation detector, such as at least accumulation start of the radiation detector 1404 described later. In particular, when the storage switch 1409 is synchronized with the radiation generator 108 and the radiation detector 1404 by using the operation of the irradiation switch 1401, the two-stage configuration of the 1st switch and the 2nd switch is used similarly to the irradiation switch 1401. Also good.

  In FIG. 14, the expansion unit 1433 of the imaging apparatus side IF unit is an independent switch, and the expansion unit 1433 is simply attached to the irradiation switch 1401 with the attachment jig 1435. The attachment jig 1435 fixes the expansion unit 1433 so as to hold the cylindrical portion of the irradiation switch. The mounting jig 1435 preferably has a simple configuration that can be mounted on various irradiation switches 1401. Therefore, the attachment jig 1435 is configured not to be attached to various irradiation switch button portions on the market but to absorb only the difference in outer shape of the cylindrical portion existing in most of the irradiation switch portions. That is, it is possible to attach to the cylindrical portion mainly by changing the length of the winding portion. When a switch is provided in the expansion unit 1433, the switch is arranged so that the timing at which the operator operates the 2nd switch 1401b of the irradiation switch 1401 can be detected substantially simultaneously. Alternatively, when the operator operates the 2nd switch 1401b of the irradiation switch 1401, the operator may press the switch on the expansion unit 1433 at substantially the same time. In this case, by changing the pressing direction of the irradiation switch 1401 and the pressing direction of the switch 1409 on the expansion unit 1433, the normal switch is arranged to be operated with the thumb and the switch 1409 on the expansion unit 1433 is operated with the index finger, for example. By configuring so that it can be easily operated with separate fingers of one hand, the operator can explicitly control the operation of the two switches. Further, when the radiation detector 1404 is not ready for imaging, an interlock unit 1455 that restricts pressing of the irradiation switch 1401 by preventing the irradiation switch 1401 from being pushed in may be provided. . In the figure, the interlock unit 1455 is in a position where the 2nd switch 1401b of the irradiation switch 1401 cannot be pressed when the preparation for photographing is not completed, and the interlock unit 1455 is the expansion unit 1433 when preparation for photographing is completed. The interlock unit 1455 cancels the restriction in response to receiving a signal from the radiation detector 1404. As another example, the switch 1409 on the expansion unit 1433 itself may be provided with an interlock mechanism that cannot be pushed in when not in the ready state but can be pushed only in the ready state. In the first place, the expansion unit 1433 of the photographing apparatus side IF is an independent switch arranged completely separately, so that the operator can operate each switch with one hand. May be configured to be clicked with a foot switch, a touch panel button on a display on the photographing control unit 1405, or a mouse which is an example of an operation unit attached to the photographing control unit 1405.

  Next, using the timing chart of FIG. 15, signal exchange according to an embodiment of a radiation imaging system provided with an imaging device switch or storage switch for controlling the radiation detector of the imaging device in addition to the irradiation switch will be described. . For convenience, the radiation imaging system according to the embodiment of FIG. 14 will be described as an example.

  An operation sequence when the switch 1409 is configured in the expansion unit 1433 of the photographing apparatus side IF 1403 will be described. In FIG. 15, a storage switch 1409 is a portion where the expansion unit 1403 of the photographing apparatus side IF 1403 is switched. In FIG. 15A, the operator depresses the accumulation switch 1409 after the X-ray generator state 1577 transitions to the ready state with the first switch 1401a signal 1571 of the irradiation switch 1401 depressing only the first switch 1401a. To do. Based on this signal, the photographing unit drive state 1573 is shifted to the accumulation state immediately after initialization if it is a drive that needs to be initialized. The operator presses the 2nd switch 1401b of the irradiation switch 1401 while the imaging unit drive state 1573 is in the accumulation period, and performs X-ray exposure in the X-ray generator state 1577. At this time, the imaging unit state 1573 needs to maintain the accumulation state until the end of the X-ray exposure. From the opposite viewpoint, it is necessary to end the X-ray exposure before the accumulation state ends. FIG. 15B shows a sequence when the accumulation start switch 1509 is first pressed. Then, after waiting for the countdown period 1521, the imaging unit drive state 1573 transitions to the accumulation state. Regarding the display of the countdown period 1521, some numerical value, a clock, or an index may be displayed on the user interface of the imaging control unit 1405, or an index or the like may be displayed on the imaging apparatus side IF 1403. The operator confirms the transition to the accumulation state, and in FIG. 15B, the pressing information by the signal 1571 of the first switch 1401a of the irradiation switch 1401 and the pressing information of the signal 1572 of the 2nd switch 1401b are output. In this case, the X-ray generator state 1577 transitions to an X-ray exposure ready state after the elapse of the X-ray generator preparation period 1520 from the time of pressing, and X-rays are emitted. The radiation detector 1404 reads out an X-ray image by accumulation time timeout or X-ray detection. Note that if the 1st switch 1401a is pressed before the radiation detector 1404 transitions to the accumulation state, the X-ray generator state 1577 can immediately transition to the X-ray exposure state. It will be shortened.

  Based on FIG. 16, the flow of the processing according to the embodiment will be described. FIG. 16A is a flowchart when the main control is performed by the control unit of the generator IF. Although described as processing performed in the radiation imaging system of FIG. 1, the processing in the radiation imaging system according to other embodiments is the same. In the embodiment of FIG. 16, the irradiation switch 101 will be described as a case where a two-stage switch of a 1st switch 101a and a 2nd switch 101b is adopted.

  In step 1610, the control unit 102 b establishes a connection (first connection) between the generator-side IF 102, which is a unit that can acquire a signal from the irradiation switch 101, and the radiation detector 104. In addition, the control unit 102b establishes a second connection through the connection unit 130 between the generator-side IF 102, which is a unit that can acquire a signal from the irradiation switch 101, and the radiation generator 108. The establishment of connection here includes at least one of a physical connection of a connector and an electric signal transmission path in the case of a wired connection. In the case of wireless, it includes processing for setting a predetermined command and information to be exchanged with the connection unit on the generator side by the acquisition unit 102a and the output unit 102c functioning as a wireless communication unit.

  In step 1611, the acquisition unit 102 a acquires a first signal indicating that the first switch (first switch) 101 a of the irradiation switch 101 has been pressed. Thus, the acquisition unit 102a detects that the 1st switch has been pressed. If not acquired, the acquisition unit 102a waits for a signal indicating that the first switch 101a of the irradiation switch 101 has been pressed. The acquisition unit 102a also stores in the storage unit the time when the 1st switch 101a of the irradiation switch 101 is pressed and the 1st switch signal is received.

  In step 1612, the output unit 102 c outputs a signal (1st switch equivalent signal) for transitioning the radiation detector 104 to a radiation detectable state in accordance with the first signal of the irradiation switch 101.

  Further, the output unit 102c outputs a Prep signal for instructing a preparation process for making the radiation generating apparatus 108 in a state capable of generating radiation, to the radiation generating apparatus. The Prep signal is generated by the control unit 102b in response to pressing of the first switch.

  In step 1613, the acquisition unit 102a acquires a signal (first signal) indicating that the 2nd switch (second switch) 102b of the irradiation switch 101 has been pressed. Thus, the acquisition unit 102a detects that the 2nd switch has been pressed. The acquisition unit 102a also stores in the storage unit the time when the 2nd switch 101b of the irradiation switch 101 is pressed and the 2nd switch signal is received.

  In step 1614, the control unit 102b controls the signal output timing according to the detected time difference of pressing. The control unit 102b reads the time when the 2nd switch 101b is pressed and the time when the 1st switch 101a is pressed from the storage unit, calculates the difference time between the times, and determines whether this is smaller than the threshold value Tdiff. To do. For example, as will be described later, when the 1st switch 101a and the 2nd switch 101b are pushed in substantially simultaneously, the difference time is considered to be shorter than Tdiff. In this case, the process proceeds to step 1619. In step S1619, the control unit 102b waits for a predetermined time based on the difference time. In this way, the control unit 102b delays the signal output timing by a specific time when the time difference from the pressing of the 1st switch 101a to the pressing of the 2nd switch 102b is smaller than a specific threshold.

  In this case, the radiation generator 108 executes the rotor-up process in response to pressing of the 1st switch 101a, and a waiting time corresponding to this is provided. By providing the standby time, the accumulation state of the radiation detector 104 can be shortened, so that the quality of the radiation image can be improved.

  For example, the waiting time is determined by the control unit 102b as a time obtained by subtracting the time required for the initialization processing of the radiation detector 104 from the time required for the rotor up. It may be a time obtained by subtracting the time required for signal transmission from this time. Alternatively, Tdiff is defined as the time required for the rotor up, and the standby time is determined based on the time required.

  In step 1615, the output unit 102c outputs a signal for causing the radiation detector 104a to transition to a state in which radiation detection is possible in response to pressing of the irradiation switch 101 and control by the control unit 102b. The output unit 102c waits as necessary, and then transmits a 2nd switch equivalent signal to the radiation detector 104 in accordance with an output instruction from the control unit 102b.

  Since the threshold value Tdiff and the standby time depend on the radiation generator 108 paired with the radiation detector 104, the radiation detector 104 is connected to a plurality of radiation generators 108 in advance to be stored in the storage unit. It is desirable to memorize it. For example, a threshold value and a standby time are stored for each radiation generator 108. The storage unit is provided in the generation apparatus side IF 102 (radiation imaging control apparatus) connected to the radiation generation apparatus 108 or the imaging apparatus side IF 103. Alternatively, a plurality of radiation detectors and radiation generation apparatuses are stored in a management server that manages them in an integrated manner, and acquired by the generation apparatus side IF 102 and the imaging apparatus side IF 103 according to the connected radiation generation apparatuses.

  Further, since the standby time varies depending on the initialization processing time of the radiation detector 104, the standby time can be stored for each pair of the radiation generator and the radiation detector in the storage unit. When the radiation generation control device and the radiation generation device are connected by wire, it is useful because it is less necessary to consider such a delay.

  Here, the generator-side IF 102 (radiation generation control device) and the radiation generation device 108 can be connected by a connection means such as a wireless LAN connected in a connection format that allows delay and loss of signals. In such a case, the standby time can be set in consideration of the delay.

  When it is determined that the time difference between pressing the 1st switch 101a and the 2nd switch 102b exceeds a specific threshold value, the output unit 102c outputs a 2d switch equivalent signal in response to the pressing of the 2nd switch 102b.

  In step 1616, the acquisition unit 102a acquires a second signal indicating the driving state of the radiation detector 104 from the radiation detector 104 via the first connection.

  In step 1617, the output unit 102c functioning as a wireless communication unit is identified via the second connection in response to the acquisition of the signal (first signal) and the second signal generated in response to pressing of the 2nd switch. The signal (Exp signal) is output to the radiation generator 108. The specific signal here is a signal for instructing the radiation generator to irradiate the radiation, and is generated by the control unit 102b in response to pressing of the 2nd switch 101b. Note that a signal generated in response to pressing of the 2nd switch can be output as it is.

  In step 1618, the control of the control unit 1081 of the radiation generation apparatus 108 causes the radiation source 107 of the radiation generation apparatus 108 to generate radiation according to acquisition of a specific signal.

  Hereinafter, processing on the imaging apparatus side corresponding to processing on the radiation generating apparatus side will be described.

  In step 1620, connections are established with the radiation detector 104, the imaging control unit 105, the imaging apparatus side IF 103, and the generation apparatus side IF 102. Here, the connection between the radiation detector 104 and the imaging control unit 105 is established by the radio communication unit using infrared rays or the like provided in the head of the imaging apparatus side IF 103 as described in the embodiment of FIG. This is done by sending wireless communication parameters to the radiation detector in response to a request from the instrument 104, thereby establishing a wireless connection.

  In step 1621, the radio communication unit of the radiation detector 104 receives a signal corresponding to the 1st switch. The wireless communication unit performs standby processing until reception.

  In step 1622, the detector control unit of the radiation detector 104 performs initialization processing (imaging unit processing a) as necessary in response to reception of the 1st switch signal. This corresponds to, for example, the initialization process shown in the timing chart of FIG. When the initialization process is not required at the transition from the idle state to the accumulation state, this process is omitted.

  In step 1623, the wireless communication unit of the radiation detector 104 receives a signal corresponding to the 2nd switch. The wireless communication unit performs standby processing until reception.

  In step 1624, the detector control unit of the radiation detector 104 performs initialization processing (imaging unit processing a) as necessary. This corresponds to, for example, the initialization process shown in the timing chart of FIG. Here, when the initialization process is not required at the transition from the idle state to the accumulation state, this process is omitted.

  In step 1625, the wireless communication unit of the radiation detector 104 transmits a storable signal (second signal) to the generator-side IF 102.

  In step 1626, the radiation detector 104 that has transitioned to the accumulation state detects radiation and acquires image data.

  FIG. 16B is a flowchart when the main control is performed by the control unit of the imaging apparatus-side IF 103. The description of the steps for performing the same processing as each step in FIG.

  In step 1665, the output unit 102c transmits a signal corresponding to the 2nd switch signal to the photographing apparatus side.

  In step 1654, the control unit of the imaging apparatus side IF 103 calculates the time interval of the reception timing between the signal corresponding to the 1st switch signal and the signal corresponding to the 2nd switch signal, and whether or not the calculated time interval is smaller than the threshold Tdiff. Determine whether. The threshold Tdiff here may be a time different from Tdiff in FIG. 16A in consideration of signal transmission. If it is determined that the time interval is shorter than Tdiff, a standby time is provided in step 1659 for delaying the transmission of the accumulable signal (second signal) by the control unit.

  By doing so, the accumulation time can be shortened and the quality of the radiation image obtained by the synchronous imaging can be improved.

  A process corresponding to the case where the operator 100 presses the 1st switch and the 2nd switch substantially simultaneously will be described based on the timing chart of FIG. For convenience, the radiation imaging system according to the embodiment of FIG. 1 in which only the switch unit employs a two-stage irradiation switch 1701 will be described as an example. FIG. 17A is a timing chart when the generator IF 102 transmits the 1st switch signal 1771 and the 2nd switch signal 1772 to the imaging apparatus IF unit 103 and the radiation generator 108. The 1st switch signal 1771 and the 2nd switch signal 1772 transition almost simultaneously. The imaging unit drive state 1773 transitions to the accumulation state in a short time, but in the radiation generator state, a preparation period such as rotor up occurs for about 1 second. Depending on the driving method of the radiation detector 104, the accumulating time is almost over in the imaging unit driving state 2173 during this preparation period, and the radiation detector 1773 transitions to image reading during the radiation exposure period of the radiation generator 108. Therefore, correct image formation cannot be performed. In this problem, in FIG. 17A, by setting the accumulation time to be longer than the predetermined time, it is possible to prevent invalid exposure from occurring by ending the exposure accumulation time.

  It is also possible to provide a delay time when the 2nd switch signal 1771 and the generator-side IF transmit a 2nd switch equivalent signal to the photographing apparatus-side IF 103.

  Another solution to this problem will be described based on the timing chart of FIG. As shown in FIG. 17B, a timing difference between the process corresponding to the 1st switch signal and the process corresponding to the 2nd switch signal is always provided for a predetermined time in the radiation detector 104 by being transmitted to the imaging apparatus side IF 103. To make it work. This standby processing for a predetermined time corresponds to the rotor up time of the radiation generator 108 and is determined for each radiation generator 108. In the standby process, the radiation detector 104 may be in the accumulation state, or the accumulation state and the initialization process may be repeated as in the idle state. As shown in FIG. 17B, when the initialization process is required when the radiation detector 104 transitions from the idle state to the accumulation state, the time required for the initialization process is subtracted from the predetermined time required for the rotor up. It will be waiting for the time. In this case, the transition from the idle state to the standby state first, followed by the initialization process, and then the transition to the accumulation state makes it possible to shorten the accumulation state, which is advantageous in terms of image quality. . In this case, the radiation generator preparation period such as the rotor up of the radiation generator 108 is registered in advance in the radiation detector 104 and the preparation period preset from the arrival time from the 1st switch equivalent signal, or the The 2nd switch equivalent signal may not be accepted until the time obtained by subtracting the initialization time for driving the imaging unit from the preparation period. In this case, after receiving the 2nd switch signal 1771, after waiting for the preparation period 1720, the accumulable signal 1774 is returned to the generator IF 102 to synchronize.

  In the above-described embodiment, the case where both the 1st switch equivalent signal and the 2nd switch equivalent signal are transmitted to the radiation detector 104 side has been described. However, this is not an essential requirement, and either one holds. If there is no 1st switch equivalent signal, it is only necessary to start the work when the conventional 1st switch equivalent signal is received after receiving the 2nd switch equivalent signal. When only the 1st switch equivalent signal is received, the driving method of the radiation detector 104 is limited. However, after receiving the 1st switch equivalent signal, the radiation detector 104 waits for a driving method that can always accumulate radiation, and performs radiation detection. This is possible.

  In the above-described embodiment, the process is based on the premise that the rotor-up process on the radiation generating apparatus side requires more time than the initialization process of the radiation detector 104. If the rotor-up process of the radiation generator is shorter, first, the control unit 102b outputs to the output unit 102c a signal that instructs the radiation detector 104 to transition to the accumulation state in response to pressing of the 1st switch. Let Here, the control unit 102b determines whether or not the time difference between pressing the 1st switch and pressing the 2nd switch is smaller than the threshold value. If the time difference is small, the Prep signal is output to the radiation generator 108 after waiting for a predetermined time. If this is done, the standby time of the radiation generator can be shortened. As a radiation generator with a very short rotor-up, for example, a radiation generator having a transmission type radiation source can be considered.

  An example in which the imaging apparatus side IF is configured in the imaging control unit and the radiation detector will be described with reference to FIG. FIG. 18A shows an embodiment in which the function of the photographing apparatus side IF 1803 is incorporated in the photographing control unit 1805. The generator IF 1803 and the radiation generator 1808 are connected to each other via a connection unit 1831. In the embodiment of FIG. 18B, the imaging apparatus side IF 1803 is incorporated in the radiation detector 1804, and the radiation detector 1804 and the radiation generator 1808 are connected by wireless connection. The connection method may be a general-purpose interface such as Ethernet (registered trademark), RS232C, or USB for wired communication, a wireless LAN standard, Bluetooth (registered trademark), or IrDA communication using infrared rays. In this method, a signal corresponding to the irradiation switch 1801 or timing information to which contents are added is executed using command communication. In this case, command communication refers to separating electric signals whose pattern fluctuates in time and transmitting them as commands according to a specific rule when transmitting on the same transmission medium. In RS232C or the like, a specific command is extracted from the signal level in accordance with voltage signal level transition rules such as a start bit and a stop bit. With this so-called serial communication, the radiation generation apparatus 1808 is used to transmit the synchronization timing signal related to the previous X-ray imaging, the setting conditions related to the X-ray generation at the time of imaging, and the execution record information related to the X-ray generation after the X-ray generation on the same communication medium. And information exchange with the radiation control unit 1805 or radiation detector 1804 on the radiation detector side. For example, if condition settings at the time of imaging are registered in the user interface of the imaging control unit 1805, in this connection form, the setting information is directly received from the imaging control unit 1805 or via the radiation detector 1804. A command can be notified to the generator 1808. As a result, information regarding the X-ray condition setting can be centrally managed between the radiation generation apparatus 1808 and the radiation detector 1804 system. Further, implementation information after the X-ray irradiation, for example, actual measurement information related to actual X-ray exposure and information related to tube voltage, tube current, and exposure time, is sent from the radiation generator 1808 to the imaging control unit 1805 or the radiation detector 1804. Command notification can be performed. In particular, when the radiation detector 1804 receives the execution information immediately after the end of the X-ray exposure, it is possible to link the X-ray image and the execution information, and in some cases, the patient-related information from the imaging control unit 1805. Important information related to line images will be linked at an early stage, reducing the risk of some mistakes, and in some cases, even if the images are temporarily stored in a radiation detector and sent to another imaging control unit, etc. Image management can be performed without any confusion regarding consistency with images.

  An embodiment of the present invention having a mobile radiation generator will be described with reference to FIG. A description of points in common with the previous embodiment will be omitted. The radiation generator 1908 can be moved by moving units 1961a and 1961b made of wheels and the like, and is used across rounds in hospitals, hospital rooms and operating rooms, for example. The radiation generation apparatus 1908 can be provided with a wireless communication unit 1931, and imaging conditions and implementation information can be exchanged via the wireless communication unit 1931 via the wireless communication unit 5101 of the radiation detector 1901 and the access point 5107. Is possible.

  The mobile radiation generation apparatus 1908 is equipped with an information processing apparatus 5112 that is a form of the imaging control unit. A display unit 5113 and an operation unit 5114 are connected to the information processing apparatus 5112, and a screen displayed by the display unit 5113 can be operated via the operation unit 5114. Thereby, setting of imaging conditions, selection of patient information to be imaged, reception of an image obtained by imaging, and transfer processing of an image to a server can be performed. A display screen displayed on the display unit 5113 is controlled by the display control unit 5116. Transmission / reception of information with an external device is performed by, for example, the wireless communication unit 5115.

  Note that in the case where the information processing apparatus 5112 is integrated with the radiation generation apparatus 1908 and is not assumed to be attached or detached, the reliability of the radiation imaging system can be improved by performing communication by wired communication. When the information processing apparatus 5112 is configured by, for example, a notebook PC or a tablet terminal, it is useful to perform wireless communication.

  A switch unit A not having a unit for synchronizing with the radiation detector 190 is connected to the radiation generator 1908, and this is connected to a switch unit B having a generator-side IF 102 as shown in FIG. Can do. When the switch unit A is connected, the radiation detector 190 detects the radiation generated by the radiation generator 1908 and shifts to the accumulation state to obtain an image. When the switch unit B is connected, the radiation detector 104 performs imaging in synchronization with the radiation generation apparatus 1908 in accordance with control from the information processing apparatus 5112. The switching of the shooting control is performed under the control of the information processing apparatus 5112. An image transmitted from the information processing apparatus 5112 via the access point 5107 is stored in a server, can be viewed from the PACS terminal 5103 and the viewer terminal 5104, and is output to a paper medium or film by the printer 5105 as necessary. The Further, the information processing apparatus 5112 receives an imaging order from the RIS and performs imaging according to the order.

  A display screen displayed on the display unit 5113 connected to the information processing apparatus 5112 functioning as the imaging control unit 105 will be described with reference to FIG. Display control of the display screen is performed by a display control unit 5116.

  FIG. 20 shows an example of a shooting screen 5301 displayed on the display unit 5113 under the control of the display control unit 5116. A screen 5301 includes a subject information display area 5302 for displaying subject information, a preview image display area 5303 for displaying a captured image, and an image adjustment button 5304 for instructing adjustment of image processing parameters of the captured image being previewed. And an inspection end button 5305 for instructing the end of the inspection, and an inspection order display area 5306 indicating information of the inspection order being executed. In the examination order display area 5306, a plurality of imaging protocol buttons 5307 are provided.

  The imaging protocol button 5307 includes a thumbnail display area 5308 for displaying thumbnails of captured images, a name display area 5309 for displaying the name of the imaging region, and a sensor type display for displaying sensor type information such as standing and lying. An area 5310 and a shooting environment information display area 5313 for displaying a sensor type and a shooting posture are provided. The shooting protocol button 5307 also indicates states such as a shooting completed state (in preview), a shooting preparation state, and a shooting ready state. The other screen 5301 is also provided with a sensor state display area 5311 indicating the state of the sensor relating to the imaging protocol being executed. Although the screen 5301 indicates the state by characters, the display control unit 5112 changes the button color or displays an animation, etc., to display the state intuitively to the user. Information can be notified.

  A display area 5317 is a display area for explaining various states of the radiation imaging system according to the above-described embodiment. In the display area 5317, whether or not the radiation detector is in an accumulated state, whether or not the connected switch unit is compatible with synchronous imaging, as in the embodiment shown in FIG. Various types of radiation imaging systems, such as whether or not a wire connection or a wireless connection is established, the number of connected switches, whether or not other switches are mounted on the irradiation switch as in the embodiment shown in FIG. Display information of. Thereby, the user can grasp | ascertain the information regarding a radiography system centrally.

  In addition, what combined the above-mentioned embodiment suitably is also contained in embodiment of this invention.

  Alternatively, a case where a part of the present invention is realized by cooperation of a program and hardware is also included in the embodiment of the present invention. In the embodiment by the program, the program corresponding to the process shown in FIG. 16 and the program corresponding to the display screen shown in FIG. 20 are stored in a storage unit (not shown) of the radiation imaging system, and the CPU expands the RAM. This is achieved by executing instructions included in the program by the CPU.

  The above-described embodiment is an exemplification of the embodiment of the present invention, and the scope of the invention is not limited to the above-described embodiment.

108 Radiation Generator 1201 Irradiation Switch 1203 Control Device 1204 Radiation Detector 1205 Imaging Control Unit 1245 First Wireless Communication Unit 1247 Second Wireless Communication Unit 1250 Control Unit

Claims (11)

A radiography control device,
A first wireless receiver that wirelessly receives a request for wireless communication parameters from a radiation detector;
A first wireless transmission unit for wirelessly transmitting wireless communication parameters to the radiation detector;
A second wireless receiver and a second wireless transmitter that communicate with the radiation detector according to the wireless parameters;
The first wireless reception unit receives a signal indicating that the shooting instruction switch has been pressed,
The second wireless transmission unit transmits a signal for transitioning the radiation detector to a radiation detectable state,
The second wireless reception unit receives a signal indicating that the radiation detector is in a state capable of detecting radiation,
The first wireless transmission unit transmits a signal indicating that the radiation detector is in a detectable state.   The first wireless reception unit receives a signal indicating that the imaging instruction switch has been pressed from the radiation generation control device, and the first wireless transmission unit is in a state where the radiation detector can be detected. The control device according to claim 1, wherein a signal to be transmitted is transmitted to the radiation generation control device.   The first wireless receiver includes a signal generated in response to pressing of the first switch of the shooting instruction switch and a signal generated in response to pressing of the second switch of the shooting instruction switch. The control device according to claim 1, wherein the control device receives the control device. Other shooting instruction switches,
Detecting means for detecting depression of the other photographing instruction switch;
The said 2nd wireless transmission part transmits the signal for changing the said radiation detector to the state which can detect a radiation according to pressing-down of the said other imaging | photography instruction | indication switch. Control device.   The control device according to claim 1, wherein the first wireless reception unit receives a parameter related to radiation generated by the radiation generation device from the radiation control device.   The control apparatus according to claim 1, further comprising display control means for displaying information indicating that the radiation detector is in an accumulation state.   The control device according to claim 6, further comprising notification means that lights up in response to the control of the display control means when the radiation detector is in an accumulation state. The first wireless reception unit receives an infrared signal,
The control device according to claim 1, wherein the first wireless transmission unit transmits an infrared signal. The second wireless reception unit receives a signal via a wireless LAN,
The control device according to claim 1, wherein the second wireless transmission unit transmits a signal via a wireless LAN. A control device according to any one of claims 1 to 9,
The radiation detector;
A radiation imaging system comprising: A method for controlling radiography,
Receiving a request for wireless communication parameters from the radiation detector by the first wireless communication unit;
Transmitting wireless communication parameters to the radiation detector by a first wireless communication unit;
Establishing a connection between the radiation detector and the second wireless communication unit according to the wireless parameter;
The first wireless communication unit receiving a signal indicating that the photographing instruction switch has been pressed; and
The second wireless communication unit transmitting a signal for transitioning the radiation detector to a radiation detectable state;
The second wireless communication unit receiving a signal indicating that the radiation detector is ready to detect radiation; and
The first wireless transmission unit transmitting a signal indicating that the radiation detector is in a detectable state; and
A control method characterized by comprising:

Images