Radiation detector and control method

Abstract

This radiation detector is provided with: a radiation detection unit which generates a radiation image by using a charge generated according to radiated radiation, and which outputs the radiation image; and a communication unit which, when transmitting the radiation image generated by the radiation detection unit, operates as a master to establish wireless communication with a slave, and for which direct connection to a global network is disabled.

Description

[[Technical Field]]

[0001] The present disclosure relates to a radiation detector and a control method. [[Background Art]]

[0002] Generally, radiation detectors that generate radiation images corresponding to radiation transmitted through a subject are known. Radiation image capturing is performed under the control of a control device such as a so-called console. In some cases, the connection between the control device and the radiation detector is established via wireless communication.

[0003] As a technique for connecting to a connection destination via wireless communication, for example, Japanese Patent Laid-Open No. 2016-189968 describes a technique capable of switching whether the radiation detector operates as a master device or a slave device in wireless communication.

[0004] Further, for example, Japanese Patent Publication No. 2012-100796 describes a technique of searching for an access point of a connection destination in wireless communication by an active scan method, and switching the scan method to a passive scan method when the connection with the access point is successfully established. In the technique described in Japanese Patent Laid-Open No. 2012-100796, communication security is improved by not using the passive scan method when searching for a connection destination access point. [[Summary of the Invention]] [[Problem to be Solved by the Invention]]

[0005] By the way, when transmitting a radiation image generated by a radiation detector to an external device such as a console, it is desired to stably perform wireless communication. However, the techniques described in Japanese Patent Laid-Open No. 2016-189968 and Japanese Patent Laid-Open No. 2012-100796 sometimes fail to provide stable wireless communication. In addition, the techniques described in Japanese Patent Laid-Open No. 2016-189968 and Japanese Patent Laid-Open No. 2012-100796 cannot always be said to provide sufficient security for wireless communication in some cases.

[0006] This disclosure has been made in consideration of the above circumstances and provides a radiation detector and control method that can reliably transmit radiation images generated by a radiation detector while ensuring the security of wireless communication. [Means for solving the problem]

[0007] A radiation detector according to a first aspect of this disclosure includes a radiation detection unit that generates and outputs a radiation image based on the charge generated in response to irradiated radiation, and a communication unit that acts as a master to transmit the radiation image generated by the radiation detection unit, performs wireless communication with a slave, and is configured to be unable to connect directly to a global network.

[0008] A radiation detector in a second aspect of the present disclosure is configured such that, in the radiation detector of the first aspect, the communication unit is configured to perform wireless communication in master or slave mode, and when configured as master, direct connection to a global network is made impossible.

[0009] A radiation detector in a third aspect of this disclosure is a radiation detector in a second aspect wherein the communication unit is capable of direct connection to a global network when a slave is configured.

[0010] A radiation detector according to a fourth aspect of the present disclosure further comprises at least one processor in a radiation detector according to any one of the first to third aspects, the processor having a first power consumption reduction mode in which power is supplied to at least the communication unit and the supply of power is cut off to other parts of the unit, and a second power consumption reduction mode in which the supply of power is cut off to both the communication unit and other parts of the unit, and the processor switches to the first power consumption reduction mode when the communication unit is operating as a master.

[0011] A fifth aspect of the present disclosure is a radiation detector in any one of the first to third aspects, further comprising at least one processor, the processor having a first power consumption reduction mode in which power is supplied to at least the communication unit and the supply of power is cut off to other parts of the unit, and a second power consumption reduction mode in which the supply of power is cut off to both the communication unit and other parts of the unit, wherein when the communication unit is operating as a master, the transition to the second power consumption reduction mode is prohibited.

[0012] A radiation detector according to a sixth aspect of the present disclosure further comprises at least one processor in a radiation detector according to any one of the first to third aspects, the processor prohibits transitioning to a power consumption reduction mode in which the supply of power to the communication unit and other parts is cut off when the communication unit is operating as a master.

[0013] The seventh aspect of the present disclosure is a radiation detector in any one of the first to sixth aspects, wherein the communication unit, when operating as a master, becomes a wireless communication access point.

[0014] Furthermore, the control method of the eighth aspect of this disclosure is a control method for a radiation detector comprising a radiation detection unit that generates and outputs a radiation image based on an electric charge generated in response to irradiated radiation, and a communication unit that transmits the radiation image generated by the radiation detection unit, wherein when the communication unit operates as a master and performs wireless communication with a slave, the method is for performing processing that makes direct connection to a global network impossible. [Effects of the Invention]

[0015] According to this disclosure, it is possible to reliably transmit radiation images generated by a radiation detector while ensuring the security of wireless communication. [Brief explanation of the drawing]

[0016] [Figure 1] This figure shows an example of a radiographic imaging system. [Figure 2]A block diagram showing an example of the hardware configuration of a radiation detector and console according to the embodiment. [Figure 3] This is a functional block diagram showing an example of the functional configuration of a radiation detector in an embodiment. [Figure 4] This flowchart shows an example of the sleep state control process in the radiation detector of the embodiment. [Modes for carrying out the invention]

[0017] The embodiments of this disclosure will be described in detail below with reference to the drawings. However, these embodiments are not intended to limit this disclosure.

[0018] First, the configuration of the radiation imaging system 1 of this embodiment will be described with reference to Figure 1. As shown in Figure 1, the radiation imaging system 1 of this embodiment includes a plurality of radiation detectors 10 (three in Figure 1, 101 to 103), two consoles 12 (two in Figure 1, 121 and 122), a RIS (Radiology Information System) 14, and a PACS (Picture Archiving and Communication System) 16. In this embodiment, the radiation imaging system 1 has been described in a case where multiple radiation detectors 10 and consoles 12 are provided, as shown in Figure 1, but the number of radiation detectors 10 and consoles 12 provided in the radiation imaging system 1 is not limited to this embodiment. For example, it may be a configuration in which at least one of the radiation detectors 10 and consoles 12 is provided as one.

[0019] The radiation detector 10 has the function of generating and outputting a radiation image corresponding to the irradiated radiation. More specifically, the radiation detector 10 has the function of generating and outputting image data representing a radiation image corresponding to the radiation irradiated from a radiation source (not shown) and transmitted through the subject. The radiation detector 10 in this embodiment is what is known as an FPD (Flat Panel Detector).

[0020] The radiation detector 10 of the present embodiment outputs image data representing the generated radiation image via wireless communication. The radiation detector 101 operates as a master in wireless communication, and performs wireless communication with the console 121 operating as a slave via a network 111 that is a local network. In this case, the radiation detector 101 itself serves as the access point AP1 in wireless communication.

[0021] Further, the radiation detector 102 operates as a slave in wireless communication, connects to an access point AP2 via a network 112 that is a local network, and performs wireless communication with the console 121 operating as a master via the access point AP2.

[0022] Further, the radiation detector 103 operates as a master in wireless communication, and performs wireless communication with the console 122 operating as a slave via a network 113 that is a local network. In this case, the radiation detector 103 itself serves as the access point AP3 in wireless communication.

[0023] The console 12 is connected to an RIS 14 via a global network 19, and has a function of controlling the radiation detector 10 based on imaging orders and the like received from the RIS 14, and controlling generation of radiation images by the radiation detector 10. Further, the console 12 is connected to a PACS 16 via a global network 19, and transmits the radiation image generated by the radiation detector 10 to the PACS 16. Note that communication between the console 12, the RIS 14, and the PACS 16 may be either wireless communication or wired communication.

[0024] As an example, the console 121 of the present embodiment is a stationary console, and is installed, for example, in a radiation imaging room. Further, the console 122 is a mobile console, and is equipped, for example, on a round car and the like.

[0025] Figure 2 shows a block diagram illustrating an example of the hardware configuration of the radiation detector 10 and console 12 in this embodiment. Since the hardware configurations of consoles 121 and 122 are substantially the same, they will be collectively referred to as console 12.

[0026] As shown in Figure 2, the console 12 of this embodiment includes a control unit 40, a storage unit 42, an I / F unit 44, a display 46, and an input device 48. The control unit 40, storage unit 42, I / F unit 44, display 46, and input device 48 are connected to each other via a bus 49, such as a system bus or a control bus, enabling the exchange of various types of information.

[0027] The control unit 40 in this embodiment controls the overall operation of the console 12. The control unit 40 includes a CPU (Central Processing Unit) 40A, a ROM (Read Only Memory) 40B, and a RAM (Random Access Memory) 40C. The ROM 40B pre-stores programs such as an imaging control processing program (not shown) for controlling the acquisition of radiation images by the console 12, which are executed by the CPU 40A. The RAM 40C temporarily stores various data.

[0028] The memory unit 42 stores image data of radiation images captured by the radiation detector 10, as well as various other information. Specific examples of the memory unit 42 include HDDs (Hard Disk Drives) and SSDs (Solid State Drives).

[0029] The I / F unit 44 communicates various information, including image data of radiation images, with the radiation detector 10 via wireless communication. In the radiation image acquisition system 1 of this embodiment, the image data of radiation images captured by the radiation detector 10 is received by the console 12 from the radiation detector 10 via wireless communication through the I / F unit 44. The I / F unit 44 also communicates various information with the RIS 14 and PACS 16 via the global network 19.

[0030] The display 46 displays various information such as shooting orders related to the acquisition of radiation images by the radiation detector 10, and radiation images acquired by the radiation detector 10. The input device 48 is used by the user to input instructions and various information related to the acquisition of radiation images, such as setting up communication with the radiation detector 10 and specifying the shooting menu according to the shooting order. The input device 48 is not particularly limited and can include, for example, various switches, touch panels, stylus pens, and mice. The display 46 and the input device 48 may be integrated to form a touch panel display.

[0031] Furthermore, as shown in Figure 2, the radiation detector 10 of this embodiment includes a display unit 24, operation buttons 28, a control unit 30, a storage unit 32, an I / F unit 34, and a radiation detection unit 35. The display unit 24, operation buttons 28, control unit 30, storage unit 32, I / F unit 34, and radiation detection unit 35 are connected to each other via a bus 39, such as a system bus or a control bus, enabling the exchange of various types of information.

[0032] The control unit 30 of this embodiment controls the overall operation of the radiation detector 10. The control unit 30 includes a CPU 30A, a ROM 30B, and a RAM 30C. The ROM 30B pre-stores programs such as the control program 31, which are executed by the CPU 30A. The RAM 30C temporarily stores various data. The CPU 30A of this embodiment is an example of the "processor" of this disclosure.

[0033] The radiation detection unit 35 has multiple pixels arranged in a row that generate signal charges in response to radiation or visible light converted from radiation by a conversion layer such as a scintillator, and has the function of generating image data that represents a radiation image corresponding to the irradiated radiation.

[0034] The storage unit 32 stores image data of radiation images captured by the radiation detector 10, as well as various other information. Specific examples of the storage unit 32 include HDDs and SSDs. In addition, the storage unit 32 of this embodiment stores information for identifying the communication destination of the radiation detector 10. Information for identifying the communication destination includes ESSID (Extended Service Set Identifier), MAC (Media Access Control) address, communication channel, communication destination name, communication method such as IEEE, and communication standards.

[0035] The I / F unit 34 communicates various information, including image data of the radiation image, with the console 12 via wireless communication. In the radiation image acquisition system 1 of this embodiment, the image data of the radiation image generated by the radiation detection unit 35 is transmitted to the console 12 via wireless communication through the I / F unit 34. The I / F unit 34 of this embodiment is an example of the "communication unit" of this disclosure.

[0036] As shown in Figure 2, the I / F unit 34 of this embodiment is configured with an operation setting 33 that indicates whether to operate as a master or a slave in wireless communication. The I / F unit 34 operates as either a master or a slave in wireless communication according to the operation setting 33.

[0037] As an example, in this embodiment, the user can configure whether the radiation detector 10 operates as a master or a slave in wireless communication by operating the radiation detector 10. For example, as described above, in this embodiment, when the radiation detector 10 operates as a master, the radiation detector 10 itself becomes an access point. Therefore, the user can configure whether the radiation detector 10 operates as a master or a slave by configuring whether or not to configure the radiation detector 10 itself as an access point. When the user configures the settings, for example, the user can configure the settings by operating the operation button 28 of the radiation detector 10, or the user can configure the settings from the console 12.

[0038] In this embodiment, when the radiation detector 10 operates as a master in wireless communication, the console 12, which operates as a slave, specifies the communication destination, and the radiation detector 10 and the console 12 are connected on a one-to-one basis. The console 12 may, for example, display information on the display 46 that represents the radiation detectors 10 that are capable of wireless communication with the console 12, and the user may specify the communication destination by selecting the information representing the radiation detector 10 operating as the master from the displayed information using the input device 48. When a communication destination is specified in this way, the control unit 40 of the console 12 controls the system to enable communication only with the specified radiation detector 10 among the multiple radiation detectors 10. In this way, when the radiation detector 10 operates as a master and functions as an access point, the radiation detector 10 performs wireless communication via the local network to only one console 12 operating as a slave. On the other hand, the radiation detector 10 is not directly connected to the global network. As an example, in this embodiment, when the operation setting 33 is set to become a master, the I / F unit 34 does not perform a connection to the global network, so that there is no direct connection to the global network. In other words, the I / F unit 34 has arbitrary restrictions placed on its connection to the global network. It should be noted that this embodiment is not limited to this configuration; for example, if a user requests a connection to the global network, the system may be configured to reject a direct connection to the global network.

[0039] The display unit 24 displays various information related to the acquisition of radiation images by the radiation detection unit 35. The operation buttons 28 are used by the user to input instructions related to the acquisition of radiation images.

[0040] Furthermore, Figure 3 shows a functional block diagram of an example of the functional configuration of the radiation detector 10 of this embodiment. As shown in Figure 3, the radiation detector 10 includes a sleep state control unit 70. As an example, in the radiation detector 10 of this embodiment, the CPU 30A of the control unit 30 executes a control program 31 stored in the ROM 30B, so that the CPU 30A functions as the sleep state control unit 70.

[0041] The sleep state control unit 70 has a function to control the transition to a sleep mode in order to reduce the power consumption of the radiation detector 10. In this embodiment, the radiation detector 10 has two types of sleep modes for reducing power consumption: a first power consumption reduction mode and a second power consumption reduction mode. Hereinafter, the first power consumption reduction mode and the second power consumption reduction mode will be collectively referred to as sleep mode.

[0042] In the first power consumption reduction mode, power is supplied to at least the I / F unit 34, while power is cut off to at least a portion of other parts, such as the radiation detection unit 35. In the second power consumption reduction mode, in addition to the parts that are cut off from power in the first power consumption reduction mode, the I / F unit 34 is also cut off from power. Therefore, power consumption is reduced more in the second power consumption reduction mode than in the first power consumption reduction mode. However, in the second power consumption reduction mode, since the I / F unit 34 is also cut off from power, communication by the I / F unit 34 becomes impossible. Therefore, the sleep state control unit 70 of this embodiment performs control to prohibit the transition to the second power consumption reduction mode when the I / F unit 34 is operating as a master.

[0043] Next, the operation of the radiation detector 10 in this embodiment in transitioning to the sleep state will be described with reference to the drawings.

[0044] In this embodiment, the radiation detector 10 executes a sleep state control process, as executed by the CPU 30A of the control unit 30, which executes a control program 31 stored in the ROM 30B. Figure 4 shows a flowchart illustrating an example of the flow of the sleep state control process executed in the radiation detector 10 of this embodiment. The sleep state control process shown in Figure 4 is executed, for example, when the radiation detector 10 is not performing any operation such as taking a radiation image, and the I / F unit 34 is not communicating with an external device such as a console.

[0045] In step S100, the sleep state control unit 70 determines whether a first predetermined time has elapsed. As an example, in this embodiment, the system transitions to the first power consumption reduction mode if the radiation detector 10 has not performed any operation, such as taking a radiation image, and the I / F unit 34 has not communicated with an external device such as the console 12 for a period of time longer than the first predetermined time. Therefore, in this step, the sleep state control unit 70 determines whether a first predetermined time has elapsed since the radiation detector 10 stopped performing any operation, such as taking a radiation image, and the I / F unit 34 stopped communicating with an external device such as the console.

[0046] If the first predetermined time has not elapsed, the determination in step S100 becomes a negative determination, and the process proceeds to step S102. In step S102, the sleep state control unit 70 determines whether or not to terminate this sleep state control process. If the radiation detector 10 has performed some operation, such as taking a radiation image, and at least one of the following has occurred: the determination in step S102 becomes a positive determination, and this sleep process is terminated. On the other hand, if the radiation detector 10 has not performed any operation, such as taking a radiation image, and the I / F unit 34 has not communicated with an external device such as a console, the determination in step S102 becomes a negative determination, and the process returns to step S100.

[0047] On the other hand, if the radiation detector 10 does not perform any operation such as taking a radiation image, and the I / F unit 34 stops communicating with an external device such as a console, and a first predetermined time has elapsed, the determination in step S100 becomes a positive determination and the process proceeds to step S104.

[0048] In step S104, the sleep state control unit 70 transitions to the first power consumption reduction mode. In the first power consumption reduction mode, as described above, the I / F unit 34 is kept powered, while at least some of the other parts, such as the radiation detection unit 35, are kept powered off.

[0049] In the next step S106, the sleep state control unit 70 determines whether a second predetermined time has elapsed since transitioning to the first power consumption reduction mode. If the second predetermined time has not yet elapsed since transitioning to the first power consumption reduction mode, the determination in step S106 becomes a negative determination, and the process proceeds to step S108.

[0050] In step S108, the sleep state control unit 70 determines whether or not to resume from the first power consumption reduction mode. As an example, in this embodiment, the sleep state control unit 70 resumes from sleep mode when it receives a resume instruction from the user. The user gives a resume instruction, for example, by operating the operation button 28 of the radiation detector 10. If the sleep state control unit 70 receives a resume instruction, the determination in step S108 becomes a positive determination, and the system proceeds to step S116. On the other hand, if the sleep state control unit 70 has not received a resume instruction, the determination in step S108 becomes a negative determination, and the system returns to step S106.

[0051] On the other hand, if the second predetermined time has elapsed since transitioning to the first power consumption reduction mode, the determination in step S106 becomes a positive determination, and the process proceeds to step S110.

[0052] In step S110, the sleep state control unit 70 determines whether the I / F unit 34 will operate as a master. Specifically, the sleep state control unit 70 refers to the operation setting 33, and if it is set to operate as a master, the I / F unit 34 will operate as a master, the determination in step S110 becomes positive, and the process proceeds to step S114. On the other hand, if the operation setting 33 is set to operate as a slave, the determination in step S110 becomes negative, and the process proceeds to step S112.

[0053] In step S112, the sleep state control unit 70 transitions to the second power consumption reduction mode. In the second power consumption reduction mode, as described above, the power supply to the I / F unit 34 is also cut off from the state of the first power consumption reduction mode.

[0054] In the next step, S114, the sleep state control unit 70 determines whether or not to return from the second power consumption reduction mode. As an example, in this embodiment, the return conditions for returning from the second power consumption reduction mode are the same as the return conditions for returning from the first power consumption reduction mode described in step S108. That is, the determination in step S114 is negative until the sleep state control unit 70 receives a return instruction, and when the sleep state control unit 70 receives a return instruction, the determination in step S114 becomes positive and the system proceeds to step S116.

[0055] In step S116, the sleep state control unit 70 performs recovery processing to return from the first power consumption reduction mode or the second power consumption reduction mode. Specifically, it performs processing to supply power to each part whose power supply was cut off. When the processing in step S116 is completed, this sleep state control processing also ends.

[0056] Thus, in this embodiment, when the radiation detector 10 operates as a master and functions as an access point, the transition to the second power consumption reduction mode is prohibited. In other words, when the radiation detector 10 operates as a master and functions as an access point, it does not enter a sleep state where the power supply to the I / F unit 34 is cut off. Therefore, the radiation detector 10 can function properly as a master in wireless communication.

[0057] As described above, the radiation detector 10 in the above configuration includes a radiation detection unit 35 that generates and outputs a radiation image based on the charge generated in response to the irradiated radiation, and an I / F unit 34 that acts as a master to transmit the radiation image generated by the radiation detection unit 35, performing wireless communication with the slave, and is configured to be unable to connect directly to a global network.

[0058] Like this to, In the above configuration of the radiation detector 10, when operating as a master in wireless communication, direct connection to the global network is not possible, thus ensuring security in wireless communication. Furthermore, as described above, since the radiation detector 10 and the console 12 are connected one-to-one, communication between the radiation detector 10 and the console 12 can be performed more stably. Therefore, with the above configuration of the radiation detector 10, radiation images generated by the radiation detection unit 35 can be stably transmitted while ensuring the security of wireless communication.

[0059] In particular, in the case of a mobile console 12, such as console 122, imaging is often performed using a single radiation detector 10 for the console 12. Therefore, in the case of a mobile console 12, it is preferable to operate the radiation detector 10 as the master.

[0060] In the above description, we explained that the console 12 can be either a stationary or mobile type, but the types of console 12 are not limited to these.

[0061] Furthermore, while the above-described embodiment describes a configuration in which the radiation detector 10 functions as an access point when it acts as a master in wireless communication, the embodiment is not limited to this configuration. When the radiation detector 10 acts as a master in wireless communication, it is sufficient for it to function as a host in wireless communication. For example, it may be a router or other host in communication.

[0062] Furthermore, in the above configuration, the timing of transitioning to sleep mode is such that the radiation detector 10 is not performing any operation such as taking radiation images, and I / F section 34 The determination is made based on the amount of time the device is not communicating with external devices such as a console. However, the timing of transitioning to sleep mode is not limited to this configuration. For example, the timing of transitioning to sleep mode may be when the sleep state control unit 70 receives a command from the user to transition to sleep mode. The user can give a transition command, for example, by operating the operation button 28 of the radiation detector 10.

[0063] Furthermore, although the above description explains a configuration in which the system transitions to the second power consumption reduction mode after transitioning to the first power consumption reduction mode, the system is not limited to this configuration, and it may also transition directly to the second power consumption reduction mode without going through the first power consumption reduction mode. For example, when the system transitions to sleep mode after receiving a transition instruction from the user as described above, the system may transition to the first power consumption reduction mode when the user lightly presses the operation button 28, and to the second power consumption reduction mode when the user long-presses the operation button 28.

[0064] Furthermore, in the above configuration, sleep mode Doka Although the timing of recovery has been described as the timing when a recovery instruction is received, the timing of recovery is not limited to this configuration. For example, a motion detection sensor such as a gyro sensor may be provided on the radiation detector 10, and the timing when the motion detection sensor detects that the radiation detector 10 has moved may be defined as the timing of recovery from sleep mode.

[0065] Furthermore, in the above configuration, the hardware structure of the processing unit that performs various processes, such as the sleep state control unit 70, can be the various processors shown below. As mentioned above, these various processors include a CPU, which is a general-purpose processor that executes software (programs) and functions as various processing units, as well as programmable logic devices (PLDs), such as FPGAs (Field Programmable Gate Arrays), which are processors whose circuit configuration can be changed after manufacturing, and dedicated electrical circuits, such as ASICs (Application Specific Integrated Circuits), which are processors with circuit configurations specifically designed to perform specific processes.

[0066] A single processing unit may consist of one of these various processors, or it may consist of a combination of two or more processors of the same or different types (for example, a combination of multiple FPGAs, or a combination of a CPU and an FPGA). Alternatively, multiple processing units may be composed of a single processor.

[0067] Examples of configuring multiple processing units with a single processor include, firstly, a configuration where one or more CPUs and software combine to form a single processor, as exemplified by client and server computers, and this processor functions as multiple processing units. Secondly, a configuration using a processor that realizes the functions of the entire system, including multiple processing units, on a single IC (Integrated Circuit) chip, as exemplified by System-on-a-Chip (SoC). Thus, various processing units are configured, in terms of hardware structure, using one or more of the above-mentioned processors.

[0068] Furthermore, the hardware structure of these various processors can more specifically utilize electrical circuits (Circuitry) that combine circuit elements such as semiconductor devices.

[0069] Furthermore, although the above embodiments describe a configuration in which the control program 31 is pre-stored (installed) in the storage unit 32, the invention is not limited to this configuration. The control program 31 may be provided in the form of a recording medium such as a CD-ROM (Compact Disc Read Only Memory), DVD-ROM (Digital Versatile Disc Read Only Memory), or USB (Universal Serial Bus) memory. Alternatively, the control program 31 may be provided in the form of a download from an external device via a network.

[0070] The disclosure of Japanese Patent Application No. 2020-183114, filed on 30 October 2020, is incorporated herein by reference in its entirety.

[0071] All documents, patent applications, and technical standards described herein are incorporated by reference to the same extent as if each individual document, patent application, and technical standard were specifically and individually noted to be incorporated by reference. [Explanation of Symbols]

[0072] 1. Radiation imaging system 10, 101-103 Radiation detectors 111-113 Network (Local Network) Consoles 12, 121, and 122 14 RIS 16 PACS 19 Global Network 24 Display 28 Operation buttons 30, 40 control unit, 30A, 40A CPU, 30B, 40B ROM, 30C, 40C RAM 31 Control Program 32, 42 Storage section 33 Operation Settings 34, 44 I / F section 35 Radiation detection unit Buses 39 and 49 46 displays 48 Input Devices 70 Sleep State Control Unit AP1-AP3 Access Points

Claims

1. A radiation detection unit generates and outputs a radiation image based on the electric charge generated in response to the irradiated radiation, A communication unit that transmits the radiation image generated by the radiation detection unit, At least one processor, Equipped with, The communication unit is configured to perform wireless communication in master or slave mode. When the communication unit operates as the master, it functions as an access point in wireless communication, and does not communicate wirelessly with multiple devices simultaneously, but only with one console operating as a slave via a local network in a one-to-one wireless communication manner, and direct connection to the global network is not possible. When the communication unit operates as the slave, it is possible to connect directly to the global network. The aforementioned processor, When performing a gradual sleep control that transitions to a first power consumption reduction mode in which, after a first predetermined time has elapsed, power is supplied to at least the communication unit and the supply of power to other parts of the system is cut off, and then, after a second predetermined time has elapsed, the system transitions to a second power consumption reduction mode in which the supply of power to both the communication unit and other parts of the system is cut off. When the communication unit operates as the master, the transition to the second power consumption reduction mode is prohibited. Radiation detector.

2. When the communication unit is operating as the master, even when the user instructs it to connect to the global network, the communication unit will perform a process to refuse a direct connection to the global network. The radiation detector according to claim 1.

3. A control method for a radiation detector comprising a radiation detection unit that generates and outputs a radiation image based on the electric charge generated in response to irradiated radiation, a communication unit that transmits the radiation image generated by the radiation detection unit, and at least one processor, The communication unit is configured to perform wireless communication in master or slave mode. When the communication unit operates as the master, it functions as an access point in wireless communication, and does not communicate wirelessly with multiple devices simultaneously, but only with one console operating as a slave via a local network in a one-to-one wireless communication manner, and direct connection to the global network is not possible. When the communication unit operates as the slave, it is possible to connect directly to the global network. The aforementioned processor, When performing a gradual sleep control that transitions to a first power consumption reduction mode in which, after a first predetermined time has elapsed, power is supplied to at least the communication unit and the supply of power to other parts of the system is cut off, and then, after a second predetermined time has elapsed, the system transitions to a second power consumption reduction mode in which the supply of power to both the communication unit and other parts of the system is cut off. When the communication unit operates as the master, the transition to the second power consumption reduction mode is prohibited. Control method.

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