JP2011130878A - Radiation image detector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a radiation image detector that promptly receives an exposure instruction signal even with a sleep function applied to save power consumption. <P>SOLUTION: The radiation image detector includes a wireless module 35 for the transmission and reception of a signal to/from an external device. In the sleep function of the wireless module 35, both a sleep state, i.e., a power saving state as a detector operation mode and a wake state where the signal transmission and reception are possible are alternately repeated at a prescribed time interval under certain prescribed conditions. The image detector also includes a communication controller 30a. When the wireless module 35 receives the exposure instruction signal from a radiation generator 112, the communication controller controls the drive condition of the wireless module 35 so that the wireless module 35 may be kept alive at the wake state at latest until the wireless module receives the exposure instruction signal from a radiation generator 112. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a radiological image detection apparatus.

  2. Description of the Related Art Conventionally, as a means for acquiring a medical radiation image, a radiation image detection device in which a solid-state imaging device called a so-called flat panel detector (FPD) is two-dimensionally arranged is known. In such a radiation image detection apparatus, radiation energy is directly converted into charges using a photoconductive material such as a-Se (amorphous selenium) as a radiation detection element, and the charges are arranged two-dimensionally. A direct readout method that reads out electrical signals in pixel units by switching elements for signal readout, such as TFT (Thin Film Transistor), or radiation energy is converted into light by a scintillator, and this light is arranged two-dimensionally. It is known that there is an indirect type that is converted into electric charge by a photoelectric conversion element such as a photodiode and read out as an electric signal by a TFT or the like.

  In recent years, a cassette-type radiation image detection apparatus having a built-in battery and configured to be portable and can be driven without a cable has been developed. When the radiation image detection apparatus is configured in this way, it is possible to perform imaging with a high degree of freedom including portable imaging on the patient's bedside or the like.

  In the case of such a radiation image detection apparatus driven by a battery, in order to keep the battery for a long time, it is preferable to reduce power consumption as much as possible when not used for imaging, and when imaging is not performed for a certain period of time. There is also known one in which each functional unit is provided with a sleep function that automatically enters a power saving mode with low power consumption.

By the way, in radiographic imaging, if radiation is exposed from the radiation generator when the radiographic image detection device is not in a state suitable for imaging, re-imaging is required, and the patient is unnecessarily exposed. It is not preferable.
Therefore, in order to ensure safety, even if the operator depresses the exposure switch, the radiation generator is kept in an interlocked state so that radiation is not exposed from the radiation generator alone (Patent Document) When it is determined that the “cassette” in FIG. 1 is in a state suitable for imaging, a technique is disclosed in which a signal to release this interlock is output to enable radiation exposure (for example, , See Patent Document 1).

And when imaging using a radiographic image detection device, a high-definition image can be obtained unless the radiographic image detection device is reset to a state suitable for imaging after imaging. May not be possible and re-shooting may be required.
Therefore, before such reset is completed, the interlock is applied so that radiation is not exposed from the radiation generator, and when the reset is completed, a signal to release this interlock is output. It is preferable to follow a procedure that enables radiation exposure.

International Publication WO2006 / 101233

However, when the radio module of the radiological image detection apparatus has a sleep function that is in a power saving mode in which the wake state and the sleep state are alternately repeated at a constant cycle, the exposure switch is set when the radio module is in the sleep state. Even if operated, the wireless module cannot receive the signal output from the exposure switch.
For this reason, even if the reset of the radiation image detection apparatus is completed, a signal to release the interlock, which is a response signal to the output signal of the exposure switch, can be output until the wireless module enters the wake state. Therefore, there is a problem that a rapid photographing operation is hindered.

That is, as shown in FIG. 11, for example, the exposure switch has two stages of half-press and full-press, and the first stage half-press (in FIG. 11 SW 1st stage press) instructs the preparation for shooting. When a signal is output and a signal for instructing shooting is output by fully pressing the second stage (pressing the second SW stage in FIG. 11), normally, when a shooting preparation signal is output, it is only after one second. A shooting instruction signal is output after a short time. However, for example, the wireless module wakes up in a cycle of about 100 milliseconds (the time in which the wireless module is in the wake state is “TW”) and the sleep state (the time in which the wireless module is in the sleep state in FIG. 11 is “TS”). When the radiography module is output when the wireless module is in the sleep state, this signal cannot be received until the wireless module enters the wake state next time.
For this reason, it takes time until the radiological image detection apparatus detects this after the imaging instruction signal is output and outputs a command to release the interlock (after the imaging instruction signal is output in FIG. 11). The time required until the interlock release command is output is assumed to be “TR”.) Meanwhile, the operator (engineer or the like) and the patient must wait for radiation exposure.

  Therefore, the present invention has been made in view of the above circumstances, and a radiological image detection apparatus capable of promptly receiving an exposure instruction signal even when a sleep function is applied to reduce power consumption. Is intended to provide.

In order to solve the above-mentioned problem, the radiological image detection apparatus of the present invention is
Sleep function that can take a sleep state that is a power-saving state as a driving state and a wake state that allows signal transmission and reception, and a power-saving mode that alternately repeats the sleep state and the wake state every predetermined time under a certain condition A wireless module that transmits and receives signals to and from an external device;
When the wireless module receives an exposure preparation signal instructing preparation for radiation exposure from the radiation generation apparatus, at least until the wireless module receives an exposure instruction signal instructing radiation exposure from the radiation generation apparatus And a communication control unit that controls a driving state of the wireless module so that the wireless module is held in the wake state.

Moreover, the radiographic image detection apparatus which is another side surface of this invention is the following.
Sleep function that can take a sleep state that is a power-saving state as a driving state and a wake state that allows signal transmission and reception, and a power-saving mode that alternately repeats the sleep state and the wake state every predetermined time under a certain condition A wireless module that transmits and receives signals to and from an external device;
When the wireless module receives an exposure preparation signal instructing preparation for radiation exposure from the radiation generation apparatus, at least until the wireless module receives an exposure instruction signal instructing radiation exposure from the radiation generation apparatus A communication control unit that controls a length of a transition period between the sleep state and the wake state in the power saving mode so that a signal reception opportunity by the wireless module is increased. .

According to the present invention, since the wireless module has a sleep function that is in a power saving mode in which the wake state and the sleep state are alternately repeated at a constant cycle, the power consumption can be significantly suppressed, and the wireless module is built in the device. Even when it is driven by a battery, it can withstand long-term use.
When the wireless module receives the exposure preparation signal from the radiation generator, the wireless module is kept in a wake state until at least the exposure instruction signal is received. Therefore, the exposure switch is operated during the power saving mode. Even in such a case, the exposure instruction signal can be detected immediately.
As a result, when the operator outputs an exposure instruction signal by operating the exposure switch, it is possible to quickly release the interlock so that the radiation can be exposed, smoothly and quickly. An effect that a proper photographing operation can be realized.

It is a perspective view which shows the external appearance of the radiographic image detection apparatus in this embodiment. FIG. 2 is an equivalent circuit diagram illustrating configurations of a sensor panel unit, a reading unit, and the like of the radiological image detection apparatus illustrated in FIG. 1. It is the schematic which shows an example of the system configuration | structure of the radiographic imaging system to which the radiographic image detection apparatus shown in FIG. 1 is applied. It is explanatory drawing which shows the drive state of the main function parts of the radiographic image detection apparatus at the time of imaging | photography and non-imaging | photography. It is explanatory drawing showing the relationship between the sleep state in a power saving mode, and a wake state. It is an example of the timing chart which shows the relationship between the operating condition of the exposure switch in 1st Embodiment, and the drive state of a radio | wireless module. It is the schematic which shows an example of the system configuration | structure of the radiographic imaging system to which the radiographic image detection apparatus in 2nd Embodiment is applied. It is an example of the timing chart which shows the relationship between the operating condition of the exposure switch in 2nd Embodiment, and the drive state of a radio | wireless module. It is an example of the timing chart which shows the relationship between the operating condition of the exposure switch in 3rd Embodiment, and the drive state of a radio | wireless module. It is an example of the timing chart which shows the relationship between the operating condition of the exposure switch in 4th Embodiment, and the drive state of a wireless module. It is an example of the timing chart which shows the relationship between the operating condition of the exposure switch in a prior art example, and the drive state of a wireless module.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. Note that embodiments to which the present invention is applicable are not limited to this.

[First Embodiment]
First, a first embodiment of a radiological image detection apparatus according to the present invention will be described with reference to FIGS. 1 to 6. However, the present invention is not limited to the illustrated example.

In this embodiment, the radiation image detection apparatus 2 is a portable cassette type FPD in which a so-called flat panel detector (hereinafter referred to as “FPD”) is configured in a cassette type, and is used for radiographic imaging. Image data (hereinafter simply referred to as “image data”) is acquired.
In the following, a so-called indirect radiation image detection device that includes a scintillator or the like and converts the emitted radiation into electromagnetic waves of other wavelengths such as visible light to obtain an electrical signal will be described as the radiation image detection device 2. However, the present invention can also be applied to a so-called direct radiation image detection apparatus that directly detects radiation with a radiation detection element without using a scintillator or the like.

FIG. 1 is a perspective view of a radiation image detection apparatus 2 in the present embodiment.
As shown in FIG. 1, the radiation image detection apparatus 2 includes a housing 21 that protects the inside. The housing 21 has at least a surface X on which radiation is received (hereinafter referred to as a radiation incident surface X) formed of a material such as a carbon plate or plastic that transmits radiation. FIG. 1 shows a case where the casing 21 is formed of a front member 21a and a back member 21b. However, the shape and configuration are not particularly limited. It is also possible to form a cylindrical so-called monocoque shape.

  As shown in FIG. 1, in the present embodiment, a power switch 22, an indicator 25, a connector portion 26 that can be connected to a charging cable, and the like are disposed on the side surface portion of the radiation image detection apparatus 2.

  The power switch 22 switches ON / OFF of the power supply of the radiation image detection apparatus 2, and by operating the power switch 22, the start of power supply to each functional unit of the radiation image detection apparatus 2 by a battery (not shown) and A signal instructing the stop is output to a control device 30 (see FIG. 2) described later. When the radiographic image detection apparatus 2 is not used for imaging, the power consumption of the battery can be suppressed by turning off the power (that is, stopping the power supply to each functional unit by the battery).

  The indicator 25 is composed of, for example, an LED or the like, and displays the remaining charge amount of the battery, various operation states, and the like.

In addition, the radiation image detection device 2 is provided with a battery that supplies power to each functional unit of the radiation image detection device 2.
The battery can be charged, for example, a rechargeable secondary battery such as a nickel cadmium battery, a nickel metal hydride battery, a lithium ion battery, a small sealed lead battery, a lead storage battery, an electric double layer capacitor, a lithium ion capacitor (LIC). A power storage element or the like can be applied.

  In addition, a lid member 70 that is opened and closed for replacement of a battery built in the housing 21 is provided on a side surface portion of the radiographic image detection apparatus 2, and a radiographic image is disposed on a side surface portion of the lid member 70. An antenna device 71 is embedded in which the detection device 2 transmits and receives information to and from the outside via a wireless access point 113 (see FIG. 3) described later.

  The connector unit 26 is configured to be electrically connectable to a cradle or a power supply cable (not shown), and is a connection unit that receives power supplied to the radiation image detection apparatus 2 from the outside.

A scintillator layer (not shown) that absorbs radiation incident from the radiation incident surface X and converts it into light having a wavelength including visible light is formed inside the radiation incident surface X (see FIG. 1) of the housing 21. As the scintillator layer, for example, a layer formed by using a phosphor in which a luminescent center substance is activated in a mother body such as CsI: Tl, Gd ₂ O ₂ S: Tb, ZnS: Ag, or the like can be used.

  A plurality of photoelectric conversion elements 23 (see FIG. 2) that convert light output from the scintillator layer into electric signals are two-dimensionally provided on the surface of the scintillator layer opposite to the surface on which radiation is incident. A sensor panel unit 24 is provided as the arranged detection means. The photoelectric conversion element 23 is, for example, a photodiode, and constitutes a radiation detection element that converts the radiation transmitted through the subject into an electrical signal together with the scintillator layer and the like.

  In the present embodiment, the reading unit 45 (see FIG. 2) is a reading unit that reads the output value of each photoelectric conversion element 23 of the sensor panel unit 24 by the control device 30, the scanning drive circuit 32, the signal reading circuit 33, and the like. Is configured.

The configurations of the sensor panel unit 24 and the reading unit 45 will be further described with reference to the equivalent circuit diagram of FIG.
As shown in FIG. 2, one electrode of each photoelectric conversion element 23 of the sensor panel unit 24 is connected to a source electrode of a TFT 46 which is a signal reading switch element. In addition, a bias line Lb is connected to the other electrode of each photoelectric conversion element 23, and the bias line Lb is connected to a bias power supply 36, and a reverse bias voltage is applied from the bias power supply 36 to each photoelectric conversion element 23. It has come to be.

  The gate electrode of each TFT 46 is connected to a scanning line Ll extending from the scanning drive circuit 32, and a read voltage (ON voltage) or OFF voltage is applied to the gate electrode of the TFT 46 from a TFT power source (not shown) via the scanning line Ll. Is applied. The drain electrode of each TFT 46 is connected to the signal line Lr. Each signal line Lr is connected to an amplifier circuit 37 in the signal readout circuit 33, and an output line of each amplifier circuit 37 is connected to an analog multiplexer 39 via a sample hold circuit 38. The signal readout circuit 33 is connected to an A / D converter 40 as processing means for converting the signal into a digital signal. The analog image signal sent from the analog multiplexer 39 is an A / D converter. 40 is converted into a digital image signal. The signal readout circuit 33 is connected to the control device 30 via the A / D conversion unit 40, and a digital image signal is output to the control device 30. A storage unit 31 is connected to the control device 30, and the control device 30 stores the digital image signal sent from the A / D conversion unit 40 in the storage unit 31 as image data.

The control device 30 is a computer including a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory), and the like (not shown), and comprehensively controls the entire radiation image detection device 2.
The control device 30 includes a communication control unit 30a that controls a driving state of a wireless module, which will be described later, a power source control unit (not shown) that performs switching control of a power supply state from the battery, and a scanning driving circuit 32 that is a sensor driving unit. And a plurality of functional units such as a panel control unit (not shown) for controlling the operation of the signal readout circuit 33 and the like.

  As shown in FIG. 4, the radiographic image detection apparatus 2 is applied with a power saving mode in which each function unit other than the power supply control unit that controls power supply or the like is in an OFF state in which almost no power is consumed during non-imaging. It has become. In addition, even during shooting, functional units that are not related to operation are turned off as much as possible to reduce power consumption, and the power supply control unit has enough power to drive each functional unit. The power supply state is controlled so as to be supplied without excess or deficiency.

For example, the panel control unit that controls the sensor panel unit 24 is in an ON state at the time of real image data acquisition and dark image data acquisition, at the time of resetting, reading out charges, and transferring data, but consumes almost electric power when accumulating charges. Not in the OFF state.
Further, the communication control unit 30a is not completely turned off even during non-shooting, but is in a power saving ON state that continues to be driven with power saving, and is completely turned on during shooting.
Further, the wireless module 35 is in a power saving mode, which will be described later, at the time of non-photographing, reset, charge accumulation, and charge readout, and is completely turned on at the time of data transfer. Thus, the power consumption can be reduced as much as possible by finely switching the power ON / OFF.

The ROM stores a program for performing various processes in the radiological image detection apparatus 2, such as a wireless module control process, a photographed image data generation process, an offset correction value generation process, and a power supply control process, and various control programs and parameters. Has been.
The control device 30 reads out a predetermined program stored in the ROM, develops it in the work area of the RAM, and the CPU executes various processes according to the program.

The storage unit 31 is configured by, for example, an HDD (Hard Disk Drive), a flash memory, or the like. The storage unit 31 includes actual image data generated by the reading unit 45 (see FIG. 2) (radiation transmitted through the subject). Based image data), dark read values (image data acquired without radiation), and the like are stored.
The storage unit 31 may be a built-in memory or a removable memory such as a memory card. Further, the capacity is not particularly limited, but preferably has a capacity capable of storing a plurality of pieces of image data. By providing such a storage means, it is possible to continuously irradiate a subject with radiation, and to record and accumulate image data each time, enabling continuous shooting and moving image shooting. Become.

The wireless module 35 is connected to the antenna device 71 (see FIG. 1), and transmits and receives various signals to and from an external device such as the console 5 under the control of the communication control unit 30a. The wireless module 35 communicates with an external device such as the console 5 in a wireless manner via the wireless access point 113. Note that a wired communication cable may be connected to enable communication in a wired manner.
In the present embodiment, the wireless module 35 is a wireless LAN module that performs communication using, for example, a LAN (Local Area Network) built in the radiation image capturing system 100 (see FIG. 3). The wireless communication method is not particularly limited.
In the present embodiment, the wireless module 35 transmits image data based on an image signal read by the reading unit 45 and converted from an analog signal to a digital signal in the A / D conversion unit 40 to the console 5 that is an external device and the console. Receives shooting order information from 5 etc.

Note that power consumption increases when the wireless module 35 is in a driving state in which signals can be transmitted and received at all times. Therefore, in the present embodiment, the wireless module 35 is in a sleep state (“TS” in FIG. 6 is a power saving state) as a driving state and a wake state (FIG. 6 is set to “TW”), and for example, when imaging is not performed for a certain period of time under a certain condition (that is, during non-imaging), or when a radiographic image is detected. When the device 2 is reset, charges are stored, charges are read, etc., when the wireless module 35 does not need to operate, it has a sleep function for a power saving mode in which the sleep state and the wake state are alternately repeated every predetermined time. is doing.
In the present embodiment, since the wireless module 35 has such a sleep function, the power consumption of the wireless module 35 can be significantly reduced.

In the power saving mode, the predetermined time during which the wireless module 35 repeats the sleep state and the wake state may be set in advance as a default, or may be set later by an operator or the like.
In this embodiment, for example, a beacon signal is transmitted to the wireless module 35 every 100 milliseconds from a wireless access point 113 described later. As shown in FIG. The default setting is to wake up to match

In addition, the length of the transition cycle between the sleep state and the wake state of the wireless module 35 in the power saving mode, how long the wireless module 35 has been in the wake state, and how long the state remains, and when the time has elapsed, the sleep state It may be determined in advance by default as to whether or not the transition is made, or may be set later by an operator or the like.
In order to reduce the power consumption of the wireless module 35, it is preferable to shorten the time during which the wireless module 35 is in a wake state as much as possible. For example, when a beacon signal is transmitted every 100 milliseconds, a beacon signal is received. The default setting is such that the wake state of the wireless module 35 is maintained for 20 milliseconds and then transitions to the sleep state, and the sleep state is maintained for 80 milliseconds until the next beacon signal is transmitted. May be.
For example, each of a wake period that is a time until the wireless module 35 switches from the wake state to the sleep state in the power saving mode and a sleep period that is a time until the wireless module 35 switches from the sleep state to the wake state in the power saving mode. A plurality of combinations may be prepared and stored in the storage unit 31 or the like.

  When there is a signal (information) held in the wireless access point 113 when in the wake state, the wireless module 35 can receive the signal. Further, the signal received by the wireless access point 113 when the wireless module 35 is in the sleep state is held in the wireless access point 113 until the wireless module 35 enters the wake state next, and the wireless module 35 enters the wake state. Can receive this signal.

The communication control unit 30a is a functional unit that controls the driving state of the wireless module.
In the present embodiment, as described above, the wireless module 35 has a sleep function that enters a power saving mode under a certain condition. Under the power saving mode, the wireless module 35 enters a wake state and sleeps at a constant cycle. However, if it takes time to acquire data when receiving data from the wireless access point 113 in the wake state, as shown in FIG. The drive state of the wireless module 35 is controlled so that the wake state is maintained until all the received data is received.

In addition, when there is transmission data to be transmitted from the radiation image detection device 2 side, the communication control unit 30 a controls the drive state so that transmission is possible regardless of the drive state of the wireless module 35.
That is, as shown in FIG. 5, when there is data to be transmitted when it is different from the timing of receiving the beacon signal, the communication control unit 30 a does not require the wireless module 35 to be in a wake state originally. The drive state is set to the wake state, and transmission data is transmitted.

Further, in the present embodiment, the exposure switch 114 that inputs an instruction related to radiation exposure from the radiation generator 112 is operated by an operator to instruct an exposure preparation signal (that is, preparation for radiation exposure from the radiation generator). When the exposure instruction signal (that is, the signal for instructing radiation exposure from the radiation generator) is output, the wireless module 35 receives these signals, and the wireless module 35 The received signal is sent to the communication control unit 30a.
When the communication control unit 30a detects that the wireless module 35 has received the exposure preparation signal from the exposure switch 114, at least the wireless module 35 receives the exposure instruction signal from the exposure switch 114 (wireless module). (Until the communication control unit 30a detects that 35 has received an exposure instruction signal from the exposure switch 114), the driving state of the wireless module 35 is controlled so that the wireless module 35 is held in the wake state. It has become.

Specifically, as illustrated in FIG. 6, when the wireless module 35 receives an exposure preparation signal from the exposure switch 114, the communication control unit 30 a instructs the wireless module 35 not to enter a sleep state. The instruction command is continuously transmitted.
As a result, after receiving the exposure preparation signal, any time the exposure instruction signal comes can be received immediately, so the time lag from when the exposure instruction signal is output until the interlock release command is output. (In FIG. 6, the time required from when the shooting instruction signal is output until the interlock release command is output is referred to as “TR”).
When the wireless module 35 receives the exposure instruction signal and outputs an interlock release command, the communication control unit 30a stops transmitting the wake instruction command to the wireless module 35. Thereby, the wireless module 35 repeats the wake state and the sleep state according to the original default setting.

In addition, this radiographic image detection apparatus 2 is arrange | positioned and used in the radiographic imaging system 100 as shown, for example in FIG.
The radiographic imaging system 100 includes, for example, a radiographic image detection device 2 and a console 5 that can communicate with the radiographic image detection device 2.

As shown in FIG. 3, the radiological image detection apparatus 2 is provided, for example, in an imaging room R1 that performs imaging of a patient (not shown) by irradiating radiation, and the console 5 corresponds to the imaging room R1. Is provided.
In the present embodiment, a case in which one radiographing room R1 is provided in the radiographic imaging system and one radiographic image detection device 2 is arranged in the radiographic room R1 will be described as an example. The number of imaging rooms and the number of radiation image detection devices 2 provided in each imaging room are not limited to the illustrated example.
Further, when there are a plurality of shooting rooms R1, the consoles 5 do not have to be provided corresponding to the respective shooting rooms R1, and even if one console 5 is associated with the plurality of shooting rooms R1. Good.

In the radiographing room R1, a radiation generator 112 including a radiation source (not shown) such as an X-ray tube that irradiates a subject (a patient's imaging target site) with radiation is provided. The radiological image detection apparatus 2 is used in a state where it is loaded and held in a bucky apparatus (not shown) or in a state where it is placed alone on a bed or the like.
When a plurality of bucky devices are provided in the imaging room R1, for example, one radiation generator 112 may be provided corresponding to each of the bucky devices, or radiation may be provided in the imaging room R1. One generation device 112 may be provided, and one radiation generation device 112 may correspond to a plurality of bucky devices, and may be used by appropriately moving the position or changing the radiation irradiation direction. .

In addition, since the radiographing room R1 is a room that shields radiation and radio waves for radio communication are blocked, the radiographic image detection apparatus 2 and an external device such as the console 5 communicate in the radiographing room R1. A wireless access point (base station) 113 for relaying these communications is provided.
A first I / F circuit 116 and a second I / F circuit 117 are connected to the wireless access point 113.

  In the present embodiment, the first I / F circuit 116 functions as a power source for supplying power to the wireless access point 113 and the like, and in a LAN (Local Area Network) constructed in the radiographic imaging system 100. It also has a function as a HUB for connecting a network cable.

  In addition, the second I / F circuit 117 is interposed between the radiation generator 112 and the wireless access point 113, and converts the signal output from the radiation generator 112 into one that is compatible with other devices. It has a function as a device. In the present embodiment, the signal output from the generator of the radiation generation apparatus 112 is a special signal, and the radiation generation apparatus 112 cannot be linked to another apparatus as it is. Therefore, by performing signal conversion processing in the second I / F circuit 117, the radiation generation apparatus 112 and other general apparatuses can be linked.

  In the present embodiment, a front room R2 is provided adjacent to the photographing room R1. In the anterior chamber R2, a radiographer, a doctor, etc. (hereinafter referred to as an “operator”) control the tube voltage, tube current, irradiation field stop, etc. of the radiation generator 112 that irradiates the subject with radiation. An operation device 115 for operating the device is disposed.

  A control signal for controlling the radiation irradiation condition of the radiation generating device 112 is transmitted from the console 5 to the operation device 115, and the radiation irradiation condition of the radiation generating device 112 is transmitted to the operation device 115. 5 is set according to the control signal from 5. Examples of radiation irradiation conditions include exposure start / end timing, radiation tube current value, radiation tube voltage value, filter type, and the like.

Further, an exposure switch 114 is connected to the operation device 115, and when an operator (that is, an engineer or the like) operates the exposure switch 114, information (signal) indicating that the switch has been pressed is output. It is like that.
In FIG. 3, as indicated by a solid arrow, a signal (SW pressing information in FIG. 3) output from the exposure switch 114 is sent to the radiation generator 112 via the operation device 115, and further the first The data is sent to the wireless access point 113 via the I / F circuit 116 and the second I / F circuit 117. The wireless access point 113 can temporarily store the received information (signal) and outputs it to the wireless module 35 of the radiation image detection apparatus 2. The signal output from the wireless access point 113 is received by the wireless module 35 when the wireless module 35 is in the wake state, and is sent to the communication control unit 30a.

  In the present embodiment, the exposure switch 114 can be pressed in two stages, and an exposure preparation signal indicating that the preparation for exposure is entered when the first stage is pressed (so-called half-pressed state). Output. In addition, an exposure instruction signal indicating that exposure is instructed when the second stage is pressed (so-called fully pressed state) is output.

  In the present embodiment, even when the exposure switch 114 is fully pressed and an exposure instruction signal is output, exposure is prohibited until the radiographic image detection apparatus 2 is ready for imaging (so-called interlock). The interlock signal is output from the console 5 so that the state is maintained. For this reason, even if the operator fully presses the exposure switch 114, the interlock state is not released and radiation is not exposed until the interlock release command is output from the radiation image detection apparatus 2. It has become.

  In FIG. 3, as indicated by a broken line, an interlock release command is generated from the radiation image detection apparatus 2 via the wireless access point 113, the first I / F circuit 116, and the second I / F circuit 117. When it is output to the device 112 and received by the radiation generator 112, radiation can be exposed. When receiving the interlock release command, the radiation generator 112 emits a predetermined amount of radiation determined in the imaging order information and the like at a predetermined time for a predetermined time.

The console 5 is a computer including a control unit configured by a CPU (Central Processing Unit), a storage unit, an input unit, a display unit, a communication unit (all not shown), and the like.
The console 5 transmits an interlock signal indicating that radiation exposure is prohibited to the radiation generation apparatus 112, and prevents radiation from being exposed in a state not suitable for imaging.
The console 5 displays an image based on the image data sent from the radiation image detection apparatus 2 on the display unit, and performs various image processing on the image data.
In the present embodiment, the console 5 is connected to an external device such as a HIS / RIS, a PACS server, an imager (not shown) via a network (not shown).

  Next, the operation of the radiation image detection apparatus 2 in the present embodiment will be described with reference to FIG.

  When shooting is not performed for a certain period of time, each functional unit such as the panel control unit and the panel driving unit is in an OFF state with low power consumption. Further, when the sleep function is ON, the wireless module 35 enters a power saving mode and enters a wake state every 100 milliseconds according to the beacon signal. For example, after maintaining the wake state for 20 milliseconds, the wireless module 35 transitions to the sleep state. Thus, the sleep state and the wake state are alternately repeated every predetermined time so that the sleep state is maintained for 80 msec until the next beacon signal is transmitted.

When the exposure switch 114 is pressed only by the first stage by the operator, an exposure preparation signal, that is, switch pressing information indicating that the exposure switch 114 has been pressed only by the first stage is output, and the radiation generator 112 is output. To the wireless access point 113 via the first I / F circuit 116 and the second I / F circuit 117.
At this time, as shown in FIG. 6, when the wireless module 35 is in the wake state, the wireless module 35 receives the exposure preparation signal and sends it to the communication control unit 30a.
If the wireless module 35 is in the sleep state when the exposure preparation signal is transmitted to the wireless access point 113, the exposure preparation signal is received from the wireless access point 113 when it enters the wake state next time. .

When the communication control unit 30a detects the exposure preparation signal (SW first stage detection in FIG. 6), the communication control unit 30a continues to transmit a wake instruction command that instructs the wireless module 35 not to enter the sleep state. Thereby, the wireless module 35 is maintained in a wake state in which a signal can be received.
In response to the detection of the exposure preparation signal, a reset operation or the like is started in the radiological image detection apparatus 2 and preparations are made so as to be ready for imaging.

When the exposure switch 114 is pressed down to the second level by the operator, an exposure instruction signal, that is, switch pressing information indicating that the exposure switch 114 is pressed down to the second level is output, and radiation is generated. The data is transmitted from the device 112 to the wireless access point 113 via the first I / F circuit 116 and the second I / F circuit 117.
At this time, since the wireless module 35 is in a wake state, the exposure instruction signal is immediately received and sent to the communication control unit 30a.

When the communication control unit 30a detects the exposure instruction signal (SW second stage detection in FIG. 6), the communication control unit 30a transmits a signal to the control unit that controls the driving state of each functional unit, and confirms whether the reset is completed. If the reset is completed, the wireless module 35 immediately transmits an interlock release command. In this case, since the time TR from when the exposure switch 114 is pressed (fully pressed) to when the interlock release command is transmitted is very short, radiographic imaging can be performed quickly thereafter.
When the reset is not completed, the wireless module 35 transmits an interlock release command after completion.

  Note that the wireless module 35 automatically returns to the power saving mode in which the wake state and the sleep state are alternately repeated at a default period after a predetermined time has elapsed after transmitting the interlock release command. It is preferable that

  As described above, according to the present embodiment, the wireless module 35 has a sleep function that enters a power saving mode under certain conditions, such as when shooting is not performed for a certain period of time, thereby reducing power consumption. Therefore, even when driven by a battery, it is possible to perform shooting for a long time.

  Further, since the wireless module 35 is kept in the wake state after detecting the exposure preparation signal, it can be immediately detected when the exposure instruction signal is output, and the interlock release command is immediately transmitted. be able to. For this reason, even when the wireless module 35 has a sleep function, the time from when the operator presses the exposure switch 114 until radiation exposure is possible (that is, the interlock is released). Is short, and radiographic images can be taken smoothly and quickly.

  In the present embodiment, since the wireless module 35 is maintained in the wake state by continuously transmitting the wake instruction command from the communication control unit 30a, the transition cycle between the wake state and the sleep state when the sleep function is applied Since the wireless module 35 can be maintained in the wake state without changing the setting of the time, it is possible to eliminate the time lag from when the exposure switch 114 is pressed until the interlock is released by a simple method. it can.

[Second Embodiment]
Next, a second embodiment of the present invention will be described with reference to FIGS. The second embodiment is different from the first embodiment in that the communication control unit controls the driving state of the wireless module. Therefore, in the following, differences from the first embodiment will be described. To do.

  In this embodiment, as shown in FIG. 7, the radiographic image detection apparatus 2 is applied to a radiographic image capturing system 100 similar to that of the first embodiment.

The communication control unit 30a in the present embodiment is configured to be capable of switching control of ON / OFF of the sleep function of the wireless module 35.
Specifically, as illustrated in FIG. 7, the communication control unit 30a outputs an instruction signal for switching the sleep function ON / OFF to the wireless module 35 so that the wireless module 35 is maintained in the wake state. To control the driving state.

In the present embodiment, when the communication control unit 30a detects that the wireless module 35 has received the exposure preparation signal output from the exposure switch 114, the communication control unit 30a instructs the wireless module 35 to turn off the sleep function. Send a signal. As a result, when the sleep function is turned off, the wireless module 35 is not in the sleep state but is kept in the wake state until the sleep function is canceled.
In order to turn the sleep function on again, an instruction signal to that effect may be transmitted again from the communication control unit 30a, or an elapse of a certain period of time or an interlock release command from the wireless module 35 may be transmitted. The sleep function may be turned on in response to output or the like.

  Since other configurations are the same as those of the first embodiment, description thereof is omitted.

  Next, the operation of the radiation image detection apparatus 2 in the present embodiment will be described with reference to FIG.

  When shooting is not performed for a certain period of time, the wireless module 35 enters a power saving mode when the sleep function is ON, and wakes up every 100 milliseconds according to the beacon signal, for example, maintains the wake state for 20 milliseconds. After that, the sleep state and the wake state are alternately repeated every predetermined time so that the sleep state is maintained and the sleep state is maintained for 80 msec until the next beacon signal is transmitted.

When the exposure switch 114 is depressed only by the first step by the operator, an exposure preparation signal is output, and the radiation generator 112 passes through the first I / F circuit 116 and the second I / F circuit 117. To the wireless access point 113.
At this time, as shown in FIG. 8, when the wireless module 35 is in the wake state, the wireless module 35 receives the exposure preparation signal and sends it to the communication control unit 30a.
If the wireless module 35 is in the sleep state when the exposure preparation signal is transmitted to the wireless access point 113, the exposure preparation signal is received from the wireless access point 113 when it enters the wake state next time. .

When the communication control unit 30 a detects the exposure preparation signal (SW first stage detection in FIG. 8), the communication control unit 30 a transmits an instruction signal for turning off the sleep function to the wireless module 35. Thereby, the wireless module 35 is maintained in a wake state in which a signal can be received.
In response to the detection of the exposure preparation signal, a reset operation or the like is started in the radiological image detection apparatus 2 and preparations are made so as to be ready for imaging.

When the exposure switch 114 is pushed down to the second level by the operator, an exposure instruction signal is output, and the radiation generator 112 outputs the first I / F circuit 116 and the second I / F circuit 117. To the wireless access point 113.
At this time, since the wireless module 35 is in a wake state, the exposure instruction signal is immediately received and sent to the communication control unit 30a.

When the communication control unit 30a detects the exposure instruction signal (SW second stage detection in FIG. 8), the communication control unit 30a transmits a signal to the control unit that controls the driving state of each functional unit to check whether the reset is completed. If the reset is completed, the wireless module 35 immediately transmits an interlock release command. In this case, since the time TR from when the exposure switch 114 is pressed (fully pressed) to when the interlock release command is transmitted is very short, radiographic imaging can be performed quickly thereafter.
When the reset is not completed, the wireless module 35 transmits an interlock release command after completion.

  The wireless module 35 enters the sleep function ON state after a certain time has elapsed after transmitting the interlock release command, and returns to the power saving mode in which the wake state and the sleep state are alternately repeated every predetermined time. Preferably it is.

  As described above, according to the present embodiment, the wireless module 35 has a sleep function that enters a power saving mode under certain conditions, such as when shooting is not performed for a certain period of time, thereby reducing power consumption. Therefore, even when driven by a battery, it is possible to perform shooting for a long time.

  Further, since the wireless module 35 is kept in the wake state after detecting the exposure preparation signal, it can be immediately detected when the exposure instruction signal is output, and the interlock release command is immediately transmitted. be able to. For this reason, even when the wireless module 35 has a sleep function, the time from when the operator presses the exposure switch 114 until radiation exposure is possible (that is, the interlock is released). Is short, and radiographic images can be taken smoothly and quickly.

  In the present embodiment, the wireless module 35 is maintained in the wake state by turning off the sleep function of the wireless module from the communication control unit 30a. Therefore, the wake state and the sleep state when the sleep function is applied It is not necessary to change the setting of the transition period, and the radio module 35 can be maintained in the wake state by outputting a signal once from the communication control unit 30a. Therefore, the exposure switch 114 is pressed by a simple method. It is possible to eliminate the time lag from when the interlock is released.

[Third Embodiment]
Next, a third embodiment of the present invention will be described with reference to FIG. The third embodiment differs from the first embodiment and the second embodiment in that the communication control unit controls the driving state of the wireless module. Differences from the embodiment and the second embodiment will be described.

  In this embodiment, the wireless module has a sleep function as in the first and second embodiments, and in the power saving mode, the sleep state and the wake state are alternated every predetermined time. It is supposed to repeat.

The communication control unit can switch and control the length of the wake period until the wireless module switches from the wake state to the next sleep state in such a power saving mode.
Specifically, a wake period change command for instructing switching to extend the wake period of the wireless module is transmitted to the wireless module.

In the present embodiment, when the communication control unit detects that the wireless module has received the exposure preparation signal from the exposure switch, the communication control unit remains in the wake state until at least the wireless module receives the exposure instruction signal from the exposure switch. In order to be maintained, a wake period change command for instructing switching to extend the wake period is transmitted to the wireless module.
For example, when the time from when the exposure preparation signal is output to when the exposure instruction signal is output is about 1 second and the wake period set by default is 20 milliseconds, the wake period change command is wireless. By being transmitted to the module, the wake period of the wireless module is extended to a predetermined time of 1 second or more.
Note that the length of the wake period when the wake period change command is transmitted may be set by default, or may be appropriately set depending on the operation state of the exposure switch. In addition, a plurality of types of wake periods of the wireless module may be set and stored in advance, and the communication control unit may select an appropriate value from these default values.
In order to return the wake period to the original length again, a command to that effect may be transmitted again from the communication control unit 30a, or a certain time may elapse or an interlock from the wireless module 35 may be transmitted. The length of the wake period may return to the default value triggered by the output of the release command or the like.

  Other configurations are the same as those in the first embodiment and the second embodiment, and thus description thereof is omitted.

  Next, the operation of the radiological image detection apparatus according to the present embodiment will be described with reference to FIG.

  When shooting is not performed for a certain period of time, the wireless module enters a power saving mode when the sleep function is ON, and enters a wake state every 100 milliseconds according to a beacon signal, for example, maintains a wake state for 20 milliseconds. Thereafter, the sleep state and the wake state are alternately repeated every predetermined time so that the sleep state is maintained and the sleep state is maintained for 80 msec until the next beacon signal is transmitted.

When the exposure switch is depressed only by the first stage by the operator, an exposure preparation signal is output, and the wireless access point is transmitted from the radiation generator via the first I / F circuit and the second I / F circuit. Sent to.
At this time, as shown in FIG. 9, when the wireless module is in a wake state, the wireless module receives the exposure preparation signal and sends it to the communication control unit.
If the wireless module is in the sleep state when the exposure preparation signal is transmitted to the wireless access point, the exposure preparation signal is received from the wireless access point when the wireless module is in the wake state next time.

When the communication control unit detects the exposure preparation signal (SW first stage detection in FIG. 9), it transmits a wake period change command for instructing the wireless module to extend the wake period. Accordingly, the wireless module is maintained in a wake state in which a signal can be received until at least an exposure instruction signal from the exposure switch is received.
In response to the detection of the exposure preparation signal, a reset operation or the like is started in the radiological image detection apparatus, and preparations are made so as to be ready for imaging.

When the exposure switch is pressed down to the second level by the operator, an exposure instruction signal is output and wirelessly transmitted from the radiation generator via the first I / F circuit and the second I / F circuit. Sent to the access point.
At this time, since the wireless module is in the wake state, the exposure instruction signal is immediately received and sent to the communication control unit.

When the communication control unit detects the exposure instruction signal (in FIG. 9, SW second stage detection), the communication control unit transmits a signal to the control unit that controls the driving state of each function unit, and confirms whether the reset is completed. If the reset is completed, the wireless module immediately transmits an interlock release command. In this case, since the time TR from when the exposure switch is pressed (fully pressed) to when the interlock release command is transmitted is very short, radiographic imaging can be performed quickly thereafter.
If the reset is not completed, the wireless module sends an interlock release command after completion.

  The wireless module is preferably configured to return to the default wake period after a predetermined time has elapsed after transmitting the interlock release command.

  As described above, according to the present embodiment, the wireless module has a sleep function that enters a power saving mode under certain conditions, such as when shooting is not performed for a certain period of time, thereby reducing power consumption. Therefore, even when driven by a battery, it is possible to perform shooting for a long time.

  In addition, after the exposure preparation signal is detected, the wireless module is kept in a wake state, so when an exposure instruction signal is output, it can be detected immediately and an interlock release command should be sent immediately. Can do. For this reason, even when the wireless module has a sleep function, the time from when the operator depresses the exposure switch until radiation exposure becomes possible (that is, the interlock is released) is short. The radiographic image can be taken smoothly and quickly.

  In this embodiment, since the wireless module is maintained in the wake state by extending the wake period of the wireless module from the communication control unit, the wireless module is maintained in the wake state by outputting a signal once from the communication control unit. The time lag from when the exposure switch is pressed to when the interlock is released can be eliminated by a simple method.

[Fourth Embodiment]
Next, a fourth embodiment of the present invention will be described with reference to FIG. The fourth embodiment is different from the first to third embodiments in that the communication control unit controls the driving state of the wireless module. Therefore, in the following, the first embodiment will be described. Differences from the third embodiment to the third embodiment will be described.

  In this embodiment, the wireless module has a sleep function as in the first to third embodiments, and in the power saving mode, the sleep state and the wake state are alternated every predetermined time. It is supposed to repeat.

The communication control unit switches the length of the sleep period until the wireless module switches from the sleep state to the next wake state in such a power saving mode, thereby changing the transition cycle between the sleep state and the wake state in the power saving mode. The length can be switched and controlled.
Specifically, a sleep period change command for instructing switching to shorten the length of the sleep period of the wireless module is transmitted to the wireless module.

In the present embodiment, when the communication control unit detects that the wireless module has received the exposure preparation signal from the exposure switch, at least until the wireless module receives the exposure instruction signal from the exposure switch, the wireless module The sleep period change command for instructing to switch the length of the sleep period of the wireless module to be shortened is transmitted to the wireless module so that the signal reception opportunities according to the above are increased.
For example, if the time from when the exposure preparation signal is output to when the exposure instruction signal is output is about 1 second, and the sleep period set by default is 80 milliseconds, the sleep period change command is wireless By transmitting to the module, the sleep period of the wireless module is shortened to a predetermined time of 10 milliseconds or less.
Note that the length of the sleep period when the sleep period change command is transmitted may be set by default, or may be appropriately set depending on the operation state of the exposure switch. Also, a plurality of types of length of the sleep period of the wireless module may be set and stored in advance, and the communication control unit may select an appropriate value from these default values.
In order to return the sleep period to the original length again, a command to that effect may be transmitted again from the communication control unit 30a, or a certain time may elapse or an interlock from the wireless module 35 may be transmitted. The length of the sleep period may return to the default value triggered by the output of the release command or the like.

  Since other configurations are the same as those of the first to third embodiments, the description thereof is omitted.

  Next, the operation of the radiological image detection apparatus according to this embodiment will be described with reference to FIG.

  When shooting is not performed for a certain period of time, the wireless module enters a power saving mode when the sleep function is ON, and enters a wake state every 100 milliseconds according to a beacon signal, for example, maintains a wake state for 20 milliseconds. Thereafter, the sleep state and the wake state are alternately repeated every predetermined time so that the sleep state is maintained and the sleep state is maintained for 80 msec until the next beacon signal is transmitted.

When the exposure switch is depressed only by the first stage by the operator, an exposure preparation signal is output, and the wireless access point is transmitted from the radiation generator via the first I / F circuit and the second I / F circuit. Sent to.
At this time, as shown in FIG. 10, when the wireless module is in a wake state, the wireless module receives the exposure preparation signal and sends it to the communication control unit.
If the wireless module is in the sleep state when the exposure preparation signal is transmitted to the wireless access point, the exposure preparation signal is received from the wireless access point when the wireless module is in the wake state next time.

When the communication control unit detects the exposure preparation signal (SW first stage detection in FIG. 10), the communication control unit transmits a sleep period change command to instruct the wireless module to switch the length of the sleep period. As a result, the wireless module enters the wake state within 10 milliseconds even when it enters the sleep state until it receives the exposure instruction signal from at least the exposure switch, and repeats the sleep state and the wake state in small increments. As a result, even if the wireless module is in the sleep state when the signal is transmitted, the wireless module enters the wake state within 10 milliseconds and can transmit and receive the signal.
In response to the detection of the exposure preparation signal, a reset operation or the like is started in the radiological image detection apparatus, and preparations are made so as to be ready for imaging.

When the exposure switch is pressed down to the second level by the operator, an exposure instruction signal is output and wirelessly transmitted from the radiation generator via the first I / F circuit and the second I / F circuit. Sent to the access point.
At this time, since the wireless module repeats the sleep state and the wake state in a short sleep period within 10 milliseconds, even if the wireless module is in the sleep state when a signal is transmitted, the wireless module is within 10 milliseconds at the latest. Becomes a wake state and can receive an exposure instruction signal.

When the wireless module receives the exposure instruction signal, it transmits it to the communication control unit. When the communication control unit detects the exposure instruction signal (SW second stage detection in FIG. 10), it sends a signal to the control unit that controls the driving state of each function unit, and confirms whether or not the reset is completed. If the reset is completed, the wireless module immediately transmits an interlock release command. In this case, since the time TR from when the exposure switch is pressed (fully pressed) to when the interlock release command is transmitted is very short, radiographic imaging can be performed quickly thereafter.
If the reset is not completed, the wireless module sends an interlock release command after completion.

  The wireless module is preferably configured to return to the length of the default wake period after a predetermined time has elapsed after transmitting the interlock release command.

  As described above, according to the present embodiment, the wireless module has a sleep function that enters a power saving mode under certain conditions, such as when shooting is not performed for a certain period of time, thereby reducing power consumption. Therefore, even when driven by a battery, it is possible to perform shooting for a long time.

  In addition, after the exposure preparation signal is detected, the wireless module alternately repeats the sleep state and the wake state in a short sleep period within 10 milliseconds, so that the signal reception opportunity by the wireless module increases. As a result, when an exposure instruction signal is output, it can be detected quickly, and an interlock release command can be transmitted early. For this reason, even when the wireless module has a sleep function, the time from when the operator depresses the exposure switch until radiation exposure becomes possible (that is, the interlock is released) is short. The radiographic image can be taken smoothly and quickly.

  Also, in this embodiment, the signal can be received once by the wireless module by outputting the signal once from the communication control unit, so the interlock is released after the exposure switch is pressed by a simple method. It is possible to eliminate the time lag until it is done.

  In the present embodiment, the wireless module is configured to repeat the sleep state and the wake state in a short sleep period for a while even after detecting the exposure instruction signal, but for a while after detecting the exposure instruction signal. During this time, the wake state may be maintained.

  In each of the above embodiments, an interlock signal for interlocking radiation exposure is transmitted from the console, and radiation can be exposed by outputting an interlock release command for canceling the radiation signal from the radiation image detection device. Although the case where it will be in the state has been described, the method of interlocking the radiation exposure is not limited to the one exemplified here.

  In addition, it goes without saying that the present invention is not limited to the present embodiment and can be appropriately changed.

2 Radiation image detection device 5 Console 30 Control unit 30a Communication control unit 35 Wireless module 100 Radiation image capturing system 112 Radiation generation device 113 Wireless access point 114 Exposure switch 116 First I / F circuit 117 Second I / F circuit

Claims (6)

Sleep function that can take a sleep state that is a power-saving state as a driving state and a wake state that allows signal transmission and reception, and a power-saving mode that alternately repeats the sleep state and the wake state every predetermined time under a certain condition A wireless module that transmits and receives signals to and from an external device;
When the wireless module receives an exposure preparation signal instructing preparation for radiation exposure from the radiation generation apparatus, at least until the wireless module receives an exposure instruction signal instructing radiation exposure from the radiation generation apparatus A radiographic image detection apparatus comprising: a communication control unit configured to control a driving state of the wireless module so that the wireless module is held in the wake state. Sleep function that can take a sleep state that is a power-saving state as a driving state and a wake state that allows signal transmission and reception, and a power-saving mode that alternately repeats the sleep state and the wake state every predetermined time under a certain condition A wireless module that transmits and receives signals to and from an external device;
When the wireless module receives an exposure preparation signal instructing preparation for radiation exposure from the radiation generation apparatus, at least until the wireless module receives an exposure instruction signal instructing radiation exposure from the radiation generation apparatus A communication control unit configured to control a length of a transition period between the sleep state and the wake state in the power saving mode so that a signal reception opportunity by the wireless module is increased. Radiation image detection device.   When the wireless module receives the exposure preparation signal, the communication control unit continues to transmit a wake instruction command that instructs the wireless module not to enter the sleep state, so that the wireless module The radiographic image detection apparatus according to claim 1, wherein the driving state of the wireless module is controlled so as to be held in a state. The communication control unit is configured to be capable of switching ON / OFF of the sleep function of the wireless module,
When the wireless module receives the exposure preparation signal, the communication control unit transmits an instruction signal to turn off the sleep function to the wireless module, so that the wireless module enters the wake state. The radiological image detection apparatus according to claim 1, wherein the driving state of the wireless module is controlled so as to be held. The communication control unit can switch and control a length of a wake period until the wireless module switches from the wake state to the next sleep state in the power saving mode,
When the wireless module receives the exposure preparation signal, the communication control unit extends the wake period so that the wake state is maintained at least until the wireless module receives the exposure instruction signal. The radiological image detection apparatus according to claim 1, wherein a wake period change command for instructing switching is transmitted to the wireless module. The communication control unit can switch and control a length of a sleep period until the wireless module is switched from the sleep state to the next wake state in the power saving mode,
When the wireless module receives the exposure preparation signal, the communication control unit transmits a sleep period change command for instructing switching to shorten the sleep period to the wireless module. The radiographic image detection apparatus of Claim 2.