JP2014000196A - Radiation imaging system and radiation imaging apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a radiation imaging system, capable of precisely preventing the radiation start of a radiant ray from being detected in error even if a radiation imaging apparatus is vibrated, and also capable of automatically and precisely informing the completion of positioning the apparatus and the start of detecting the radiation start of a radiant ray to the radiation imaging apparatus.SOLUTION: This radiation imaging system 50 includes: a radiation imaging apparatus 1 having a control means for detecting the radiation start of a radiant ray based on data leak read by a readout circuit before imaging; and a detection means for dispatching a signal for detecting the completion of positioning the radiation imaging apparatus 1. The control means of the radiation imaging apparatus 1 starts the processing of detecting the radiation start of a radiant ray based on the readout data leak on determining that the positioning of the apparatus 1 is completed based on a signal received from the detection means.

Description

  The present invention relates to a radiographic imaging system and a radiographic imaging apparatus, and more particularly to a radiographic imaging system using a radiographic imaging apparatus that can detect the start of radiation irradiation by the apparatus itself.

  A so-called direct-type radiographic imaging device that generates electric charges by a detection element in accordance with the dose of irradiated radiation such as X-rays and converts it into an electrical signal, or other radiation such as visible light with a scintillator A so-called indirect radiographic imaging device that converts the light into a wavelength and then generates electric charges by a photoelectric conversion element such as a photodiode in accordance with the energy of the converted and irradiated light to convert it into an electrical signal (ie, image data). Have been developed. In the present invention, the detection element in the direct type radiographic imaging apparatus and the photoelectric conversion element in the indirect type radiographic imaging apparatus are collectively referred to as a radiation detection element.

  This type of radiographic imaging apparatus is known as an FPD (Flat Panel Detector), and is conventionally configured as a so-called dedicated machine type (also referred to as a fixed type or an installation type) integrally formed with a support base. However, in recent years, a portable radiographic imaging apparatus in which a radiation detection element or the like is housed in a housing and can be carried has been developed and put into practical use (for example, Patent Document 2, 3).

  In such a radiographic imaging apparatus, for example, as shown in FIG. 3 and the like, which will be described later, normally, a plurality of radiation detection elements 7 are arranged in a two-dimensional form (matrix) on the detection unit P, and each radiation detection element 7 is connected to switch means 8 each formed of a thin film transistor (hereinafter referred to as TFT).

  In general, radiographic imaging is performed by irradiating radiation from the radiation source of the radiation generating apparatus to the radiographic imaging apparatus through the body of the subject, that is, the subject. Then, after imaging, an ON voltage is sequentially applied from the gate driver 15b to each of the lines L1 to Lx of the scanning line 5 so that each TFT 8 is sequentially turned on, and is generated and accumulated in each radiation detecting element 7 by radiation irradiation. The formed electric charges are sequentially discharged to the signal lines 6 and read out as image data D by the readout circuits 17 respectively.

  By the way, in the conventional radiographic imaging system using such a radiographic imaging apparatus, radiographic imaging was performed by exchanging signals between the radiographic imaging apparatus and the radiation generating apparatus. However, for example, when the manufacturers of the radiographic imaging apparatus and the radiation generation apparatus are different, it may not always be easy to construct an interface between them, or the interface may not be constructed. .

  In such a case, when viewed from the side of the radiographic imaging device, it is not known at what timing the radiation is emitted from the radiation source. Therefore, in such a case, the radiographic imaging device needs to be configured so that the device itself can detect that radiation has been emitted from the radiation source. Various types of radiographic image capturing apparatuses that can detect the start of radiation irradiation and perform image capturing with the radiographic image capturing apparatus itself have been developed.

  For example, in the inventions described in Patent Literature 4 and Patent Literature 5, when radiation is started on the radiation imaging apparatus and charges are generated in each radiation detection element 7, each radiation detection element 7 sends each radiation detection element. The bias line 9 is provided with a current detection means by utilizing the fact that charges flow out to the bias line 9 (see FIG. 3 described later) connected to 7 and the current flowing through the bias line 9 increases. It has been proposed to detect a current value of a current flowing through the inside and detect the start of radiation irradiation based on the current value.

  However, when configured as described above, noise generated by the current detection means adversely affects the amount of charge accumulated in each radiation detection element 7 and is removed from the image data D read from each radiation detection element 7. However, it has been found that there are problems such as superimposing noise that is not always easy.

  Therefore, as a result of various studies on different methods for detecting that the radiation imaging apparatus itself has irradiated the radiation, the inventors have accurately detected that the radiation imaging apparatus itself has been irradiated. It was possible to find a technique that can be used (see, for example, Patent Documents 6 and 7).

  These new detection methods are configured to detect the start of radiation irradiation based on the data read out by each readout circuit 17 before radiographic image capturing. I will explain later.

  The control unit of the radiographic imaging apparatus is configured to monitor the data read by each readout circuit 17 as described above, and the data is larger than a set threshold value, for example, by irradiation with radiation. It is configured to detect that the irradiation of radiation has started at the time point.

JP-A-9-73144 JP 2006-058124 A JP-A-6-342099 US Pat. No. 7,211,803 JP 2009-219538 A International Publication No. 2011/13517 Pamphlet International Publication No. 2011-152093 Pamphlet

  By the way, in the research by the present inventors, it has been found that the value of read data may become abnormally large when an impact, vibration, or the like is applied to the radiographic imaging apparatus configured as described above.

  The cause of such a phenomenon is not necessarily clearly clarified, but the influence of static electricity accumulated on the substrate on which the radiation detection element 7 is formed or the substrate on which the scintillator is formed, or the readout circuit 17. This is considered to be caused by a vibration of a flexible circuit board (also referred to as a chip on film or the like; see 12 in FIG. 5 described later) in which a chip such as a readout IC 16 having a built-in chip is incorporated on a film.

  As described above, when the value of the read data becomes a large value, the read data becomes equal to or larger than the threshold value even though the radiation image capturing apparatus is not actually irradiated with radiation. Then, there is a risk of erroneous detection that radiation irradiation has started.

  When such a false detection occurs, the radiographic image capturing apparatus automatically shifts to a charge accumulation state as will be described later and performs a reading process of the image data D. However, since the radiation image capturing apparatus is not actually irradiated with radiation and the subject is not captured, the read image data D is wasted, and the radiation image capturing apparatus performs a wasteful reading process. As a result, there arises a problem that power is consumed wastefully.

  Further, while the radiographic image capturing apparatus performs the above processing, the radiographic image capturing apparatus cannot perform the next image capturing, so that a radiographer or other photographer operates the radiographic image capturing apparatus. Therefore, a process such as forcibly stopping the series of processes based on erroneous detection is required. However, in this case, the usability of the radiographic image capturing system including the radiographic image capturing apparatus becomes poor.

  Therefore, the radiation based on the value of the read data until the positioning of the radiographic imaging apparatus that is most likely to be subjected to shock, vibration, etc., that is, the alignment of the radiographic imaging apparatus with the patient's body, etc. is completed. It is possible to configure so that the irradiation start detection process is performed from the time when the positioning of the radiographic imaging device is completed without performing the irradiation start detection process.

  At that time, it is necessary to inform the radiographic imaging device that the positioning has been completed, that is, the detection process of the start of radiation irradiation should be started. For example, a radiographer or other radiographer performs the notification. If comprised in this way, there exists a possibility that a photographer may feel troublesome to notify a radiographic imaging apparatus that the positioning was completed one by one.

  In addition, there is a possibility that the radiation image capturing apparatus is forgotten to be notified, and radiation is applied to the radiation image capturing apparatus that has not been subjected to the detection process for starting radiation irradiation. In such a situation, not only radiographic imaging cannot be performed and the image data D cannot be obtained, but also re-imaging is required, so that the patient exposure dose increases and the burden on the patient increases. Problems occur.

  The present invention has been made in view of the above-described problems. Even if vibration or the like is applied to a radiographic imaging apparatus that can detect the start of radiation irradiation by the apparatus itself, the radiographic imaging apparatus performs irradiation of radiation. It is possible to prevent erroneous detection of the start accurately, and to automatically and accurately start the radiation irradiation start detection process for the radiographic imaging apparatus after the positioning of the apparatus is completed. An object of the present invention is to provide a radiographic imaging system and a radiographic imaging apparatus that can be notified.

In order to solve the above problems, the radiographic image capturing system and radiographic image capturing apparatus of the present invention include:
A plurality of scanning lines and a plurality of signal lines;
A plurality of radiation detection elements arranged two-dimensionally;
Scanning drive means for switching on and applying an on-voltage and an off-voltage to each scanning line;
Switch means connected to each of the scanning lines and causing the signal lines to discharge charges accumulated in the radiation detection element when an on-voltage is applied;
A readout circuit that converts the electric charge emitted from the radiation detection element into image data and reads the image data;
Prior to radiographic imaging, a radiation irradiation start detection process is performed based on the data read out by the readout circuit, and at least the scan driving means and the readout circuit are controlled after detection of the radiation irradiation start. Control means for reading out the electric charges emitted from the radiation detection elements as image data,
A radiographic imaging device comprising:
A radiation generator comprising: a radiation source that irradiates radiation to the radiation imaging apparatus; and an exposure switch that inputs an instruction to start radiation irradiation from the radiation source;
Detecting means for transmitting a signal for detecting that the positioning of the radiographic apparatus has been completed;
With
When the control unit of the radiographic image capturing apparatus determines that the positioning of the radiographic image capturing apparatus is completed based on the signal received from the detecting unit, the radiation irradiation start detection process based on the read data It is characterized by starting.

  According to the radiation image capturing system and the radiation image capturing apparatus of the system as in the present invention, during the positioning of the radiation image capturing apparatus, the control means of the radiation image capturing apparatus performs the detection process of the start of radiation irradiation. Do not do. Therefore, even if vibration or the like is applied to the radiographic imaging apparatus during positioning, it is possible to accurately prevent the start of radiation irradiation from being erroneously detected.

  In addition, after the positioning of the radiographic imaging apparatus is completed, before the radiation irradiation is started, the positioning of the radiographic imaging apparatus is completed from the detection unit to the control unit of the radiographic imaging apparatus. A signal for detecting this is accurately and automatically transmitted. Therefore, it is possible to automatically and accurately notify the radiographic imaging apparatus that the positioning of the radiographic imaging apparatus has been completed and the detection process of the start of radiation irradiation should be started.

  Then, the control unit of the radiographic imaging apparatus 1 accurately determines that the positioning of the radiographic imaging apparatus has been completed based on the signal received from the detection unit before the radiation irradiation to the radiographic imaging apparatus 1 is started. This makes it possible to accurately and automatically start the process of detecting the start of radiation irradiation. Therefore, at the time when radiation irradiation is started on the radiographic imaging apparatus, the detection process of radiation irradiation start is surely started, so that it is possible to accurately detect that radiation irradiation has started. It becomes possible.

It is sectional drawing of a radiographic imaging apparatus. It is a top view which shows the structure of the board | substrate of a radiographic imaging apparatus. It is a block diagram showing the equivalent circuit in the basic composition of a radiographic imaging device. It is a block diagram showing the equivalent circuit about 1 pixel which comprises a detection part. It is a side view explaining the board | substrate with which a flexible circuit board, a PCB board | substrate, etc. were attached. 6 is a timing chart showing charge reset switches, pulse signals, and TFT on / off timings in image data read processing. It is a figure which shows the structural example of the radiographic imaging system which concerns on this embodiment constructed | assembled in the imaging | photography room. It is a figure which shows the structural example of the radiographic imaging system which concerns on this embodiment constructed | assembled on the round-trip vehicle. It is a figure explaining each electric charge leaked from each radiation detection element via TFT by the detection method 1 as leak data. 6 is a timing chart showing on / off timings of charge reset switches and TFTs in a leak data read process. It is a graph showing the example of the time transition of the leak data read. 6 is a timing chart for explaining the timing of applying an on-voltage to each scanning line in the detection process of radiation irradiation, the charge accumulation state, and the image data read process when the detection method 1 is adopted. It is a graph showing the example of the time transition of the leak data read. 6 is a timing chart showing the timing of sequentially applying an on-voltage to each scanning line when data reading processing for detecting the start of irradiation is repeatedly performed before radiographic image capturing in the detection method 2; It is a graph showing the relationship between the continuation time (tau) of sleep mode, and the frequency | count S of the reset process of each radiation detection element 7 set variably. It is a figure showing the example of the pressure sensor as a detection means attached to the radiographic imaging apparatus. It is a figure showing the example of the vibration sensor as a detection means attached to the radiographic imaging apparatus. It is a figure showing the example of the temperature sensor as a detection means attached to the radiographic imaging apparatus. It is a figure showing the example of the detection means attached to the exposure switch of the radiation generator.

  Embodiments of a radiographic image capturing system and a radiographic image capturing apparatus according to the present invention will be described below with reference to the drawings.

  In the following description, a so-called indirect radiation image capturing apparatus that includes a scintillator or the like as a radiation image capturing apparatus and converts an irradiated radiation into light of another wavelength such as visible light to obtain an electrical signal will be described. The present invention can also be applied to a so-called direct type radiographic imaging apparatus that directly detects radiation with a radiation detection element without using a scintillator or the like.

  Although the case where the radiographic imaging apparatus is a so-called portable type will be described, the present invention can also be applied to a so-called dedicated machine type radiographic imaging apparatus formed integrally with a support base or the like. Is possible.

[Radiation imaging equipment]
A configuration and the like of the radiographic image capturing apparatus according to the present embodiment will be described. FIG. 1 is a cross-sectional view of a radiographic image capturing apparatus according to the present embodiment, and FIG. 2 is a plan view illustrating a configuration of a substrate of the radiographic image capturing apparatus.

  In the present embodiment, as shown in FIG. 1, the radiographic image capturing apparatus 1 includes a scintillator 3, a substrate 4, and the like in a housing 2 having a radiation incident surface R that is a surface on which radiation is irradiated. The sensor panel SP is housed. Moreover, although illustration is abbreviate | omitted in FIG. 1, in this embodiment, the housing | casing 2 is provided with the antenna 41 (refer FIG. 3 mentioned later).

  Although not shown in FIG. 1, in the present embodiment, the radiographic image capturing apparatus 1 includes a connector on the side surface of the housing 2 or the like, and a console 58 receives signals and data in a wired manner via the connector. Etc. can be sent to. For this reason, this connector also functions as a communication means of the radiation image capturing apparatus 1.

  As shown in FIG. 1, a base 31 is disposed in the housing 2, and the radiation incident surface R side of the base 31 (hereinafter, simply referred to as the upper surface side in accordance with the vertical direction in the drawing). The substrate 4 is provided through a lead thin plate (not shown). A scintillator 3 that converts irradiated radiation into light such as visible light is provided on the scintillator substrate 34 on the upper surface side of the substrate 4, and the scintillator 3 is provided facing the substrate 4 side.

  Further, on the lower surface side of the base 31, a PCB substrate 33 on which electronic components 32 and the like are arranged, a battery 24, and the like are attached. In this way, the sensor panel SP is formed by the base 31, the substrate 4, and the like. In the present embodiment, the buffer material 35 is provided between the sensor panel SP and the side surface of the housing 2.

  In the present embodiment, the substrate 4 is formed of a glass substrate, and as shown in FIG. 2, a plurality of scanning lines 5 and a plurality of signals are provided on the upper surface 4a of the substrate 4 (that is, the surface facing the scintillator 3). The lines 6 are arranged so as to intersect each other. A radiation detection element 7 is provided in each small region r defined by the plurality of scanning lines 5 and the plurality of signal lines 6 on the surface 4 a of the substrate 4.

  In this way, the entire small region r provided with a plurality of radiation detection elements 7 arranged in a two-dimensional form (matrix) in each small region r partitioned by the scanning lines 5 and the signal lines 6, that is, FIG. The area indicated by the alternate long and short dash line in FIG. In the present embodiment, a photodiode is used as the radiation detection element 7, but a phototransistor or the like can also be used, for example.

  Here, the circuit configuration of the radiation image capturing apparatus 1 will be described. FIG. 3 is a block diagram illustrating an equivalent circuit of the radiographic image capturing apparatus 1 according to the present embodiment, and FIG. 4 is a block diagram illustrating an equivalent circuit for one pixel constituting the detection unit P.

  The first electrode 7a of each radiation detection element 7 is connected to a source electrode 8s (see “S” in FIG. 3 and FIG. 4) of a TFT 8 serving as a switch means. Further, the drain electrode 8d and the gate electrode 8g (see “D” and “G” in FIGS. 3 and 4) of the TFT 8 are connected to the signal line 6 and the scanning line 5, respectively.

  The TFT 8 is turned on when a turn-on voltage is applied to the gate electrode 8g via the scanning line 5 from the scanning driving means 15 described later, and is accumulated in the radiation detection element 7 via the source electrode 8s and the drain electrode 8d. The charged electric charge is discharged to the signal line 6. Further, when a turn-off voltage is applied to the gate electrode 8 g via the scanning line 5, the gate electrode 8 g is turned off, the discharge of charge from the radiation detection element 7 to the signal line 6 is stopped, and charge is accumulated in the radiation detection element 7. It is supposed to let you.

  In the present embodiment, as shown in FIGS. 2 and 3, the bias line is applied to the second electrode 7 b of each radiation detection element 7 at a rate of one for each radiation detection element 7 in a row on the substrate 4. 9 is connected, and each bias line 9 is bound to the connection 10 at a position outside the detection portion P of the substrate 4.

  The connection 10 is connected to a bias power supply 14 (see FIGS. 3 and 4) via an input / output terminal 11 (also referred to as a pad, see FIG. 2). The connection 10 and each bias line 9 are connected from the bias power supply 14 to the connection. Thus, a reverse bias voltage is applied to the second electrode 7b of each radiation detection element 7.

  In the present embodiment, as shown in FIG. 5, chips such as a readout IC 16 (described later) and a gate IC 15d constituting a gate driver 15b of the scanning drive means 15 are incorporated on the film at each input / output terminal 11. The flexible circuit board 12 is connected via an anisotropic conductive adhesive material 13 such as an anisotropic conductive adhesive film (Anisotropic Conductive Film) or an anisotropic conductive paste (Anisotropic Conductive Paste).

  The flexible circuit board 12 is routed to the back surface 4b side of the substrate 4 and is connected to the PCB substrate 33 described above on the back surface 4b side. In this way, the sensor panel SP of the radiation image capturing apparatus 1 is formed. In FIG. 5, illustration of the electronic component 32 and the like is omitted.

  On the other hand, each scanning line 5 is connected to the gate driver 15b of the scanning driving means 15 via the input / output terminal 11, respectively. In the scanning drive means 15, an ON voltage and an OFF voltage are supplied from the power supply circuit 15a to the gate driver 15b via the wiring 15c, and applied to the lines L1 to Lx of the scanning line 5 by the gate driver 15b. The voltage is switched between an on voltage and an off voltage.

  Each signal line 6 is connected to each readout circuit 17 built in the readout IC 16 via each input / output terminal 11. In the present embodiment, the readout circuit 17 is mainly composed of an amplification circuit 18 and a correlated double sampling circuit 19. An analog multiplexer 21 and an A / D converter 20 are further provided in the read IC 16. 3 and 4, the correlated double sampling circuit 19 is represented as CDS.

  In the present embodiment, the amplifier circuit 18 is a charge amplifier circuit including an operational amplifier 18a, a capacitor 18b and a charge reset switch 18c connected in parallel to the operational amplifier 18a, and a power supply unit 18d that supplies power to the operational amplifier 18a and the like. It consists of The signal line 6 is connected to the inverting input terminal on the input side of the operational amplifier 18a of the amplifier circuit 18.

  The charge reset switch 18 c of the amplifier circuit 18 is connected to the control means 22, and is turned on / off by the control means 22. In this embodiment, a switch 18e that opens and closes in conjunction with the charge reset switch 18c is provided between the operational amplifier 18a and the correlated double sampling circuit 19, and the switch 18e is the charge reset switch 18c. Is turned off / on in conjunction with the on / off action.

  In the process of reading the image data D from each radiation detection element 7, as shown in FIG. 6, the TFT 8 of each radiation detection element 7 is in a state where the charge reset switch 18c of the amplifier circuit 18 is turned off. When the ON voltage is applied to the signal line 6, electric charges are discharged from the radiation detection elements 7 to the signal lines 6, and flow into the capacitors 18 b of the amplification circuits 18 of the readout circuits 17 to be accumulated. In the amplifier circuit 18, a voltage value corresponding to the amount of charge accumulated in the capacitor 18b is output from the output side of the operational amplifier 18a.

  The correlated double sampling circuit 19 outputs an increase in the output value from the amplifier circuit 18 before and after the charge flows from each radiation detection element 7 as analog value image data D to the downstream side. The output image data D is sequentially transmitted to the A / D converter 20 via the analog multiplexer 21, and is sequentially converted into digital image data D by the A / D converter 20 and stored in the storage means 23. Output and save sequentially. In this way, the reading process of the image data D is performed.

  The control means 22 includes a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory), an input / output interface, etc., not shown, connected to a bus, an FPGA (Field Programmable Gate Array), or the like. It is configured. It may be configured by a dedicated control circuit.

  Then, the control unit 22 controls the operation of each functional unit of the radiographic imaging apparatus 1 such as controlling the scanning driving unit 15 and the readout circuit 17 to perform the readout process of the image data D as described above. It has become. As shown in FIGS. 3 and 4, the control means 22 is connected to a storage means 23 composed of SRAM (Static RAM), SDRAM (Synchronous DRAM) or the like.

  In the present embodiment, the control unit 22 is connected to the wireless communication unit 42 including the antenna 41 described above. The wireless communication unit 42 performs wireless communication such as signals with an external device via the antenna 41. In addition, the image data D and the like are transmitted to a console 58 (see FIG. 7 and FIG. 8) to be described later by a wireless method. The control unit 22 is further connected to a battery 24 that supplies power necessary for each functional unit such as the scanning drive unit 15, the readout circuit 17, the storage unit 23, and the bias power source 14.

  In the present embodiment, the radiographic imaging apparatus 1 performs radiographic imaging by supplying power to each functional unit such as the scanning drive unit 15 and the readout circuit 17 in order to avoid the consumption of the built-in battery 24. An imaging-capable mode (also referred to as a wake-up mode), and a sleep mode in which power is supplied only to necessary functional units such as the wireless communication unit 42 and radiographic imaging cannot be performed. The power consumption mode of the radiation image capturing apparatus 1 can be switched between.

[Radiation imaging system]
Next, the configuration and the like of the radiation image capturing system 50 according to the present embodiment will be described. FIG. 7 is a diagram illustrating a configuration example of the radiation image capturing system 50 according to the present embodiment. In FIG. 7, the case where the radiographic imaging system 50 is constructed in the imaging room R1 is shown.

  A bucky device 51 is installed in the photographing room R1, and the bucky device 51 can be used by loading the radiographic image photographing device 1 in the cassette holding portion 51a. FIG. 7 shows the case where a bucky device 51A for standing position shooting and a bucky device 51B for standing position shooting are installed as the bucky device 51. For example, only one of the bucky devices 51 is provided. It may be done.

  As shown in FIG. 7, the imaging room R1 is provided with at least one radiation source 52A for irradiating the radiation image capturing apparatus 1 loaded in the Bucky apparatus 51 via a subject. In the present embodiment, by moving the radiation source 52A or changing the irradiation direction of radiation, it is possible to irradiate both the standing-up imaging device 51A and the lying-up imaging device 51B. It is like that.

  The imaging room R1 is provided with a repeater (also referred to as a base station or the like) 54 for relaying communication between the devices in the imaging room R1 and the devices outside the imaging room R1. In the present embodiment, the repeater 54 is provided with an access point 53 so that the radiographic imaging apparatus 1 can transmit and receive image data D, signals, and the like in a wireless manner.

  The repeater 54 is connected to the radiation generator 55 and the console 58, and LAN (Local Area Network) communication is transmitted to the repeater 54 from the radiation imaging apparatus 1, the console 58, and the like to the radiation generator 55. A converter (not shown) that converts a signal for use into a signal for use in the radiation generator 55 and the reverse conversion is incorporated. Note that 45d and the like in FIG. 7 will be described later.

  In the present embodiment, the front room (also referred to as an operation room, a console room, etc.) R2 is provided with an operation console 57 of the radiation generator 55. The operation console 57 is operated by a radiographer or other photographer. Thus, an exposure switch 56 for inputting an instruction to start radiation irradiation to the radiation generator 55 is provided. The radiation generating device 55 is configured to emit radiation from the radiation source 52 when the exposure switch 56 is operated by the photographer. Further, various controls such as adjusting the radiation source 52 so as to emit an appropriate dose of radiation are performed.

  As shown in FIG. 7, in the present embodiment, a console 58 constituted by a computer or the like is provided in the front chamber R2. The console 58 can be configured to be provided outside the imaging room R1 and the front room R2, in a separate room, and the like, and is installed in an appropriate place.

  The console 58 transmits necessary information to the radiographic image capturing apparatus 1 and the radiation generating apparatus 55, starts and stops the radiographic image capturing apparatus 1, or sets the power consumption mode to a sleep mode as necessary. Each device in the photographing room R1 and the front room R2 is controlled by, for example, transition between the photographing mode and the photographing enable mode.

  Further, the console 58 is provided with a display unit 58a configured to include a CRT (Cathode Ray Tube), an LCD (Liquid Crystal Display), and the like, and also includes input means such as a mouse and a keyboard (not shown). Yes. In addition, the console 58 is connected to or has a built-in storage means 59 composed of an HDD (Hard Disk Drive) or the like.

  On the other hand, as shown in FIG. 8, the radiographic imaging device 1 is not loaded in the bucky device 51 and can be used in a so-called state. For example, when the patient H cannot get up from the bed B of the patient room R3 and cannot go to the imaging room R1, the radiographic imaging device 1 is brought into the patient room R3 as shown in FIG. It can be used by being inserted into the patient's body or applied to the patient's body.

  In this case, as shown in FIG. 8, a so-called portable radiation generating device 55 is brought into the hospital room R <b> 3, for example, by being mounted on a roundabout wheel 71. The radiation 52P of the portable radiation generating device 55 is configured so as to be able to irradiate radiation in an arbitrary direction. For the radiation imaging apparatus 1 inserted between the bed B and the patient's body, etc. It is possible to irradiate radiation from an appropriate distance and direction.

  Further, in this case, a repeater 54 provided with an access point 53 is built in the radiation generator 55, and the repeater 54 communicates between the radiation generator 55 and the console 58 in the same manner as described above. The communication between the radiation image capturing apparatus 1 and the console 58, the transmission of image data D, and the like are relayed.

  Also in this case, the console 58 controls each device such as the radiation image capturing device 1 and the radiation generating device 55 in the radiation image capturing system 50.

  In addition, as shown in FIG. 7, the radiographic imaging device 1 is composed of the body of a patient (not shown) lying on the bucky device 51B for supine photography in the photographing room R1 and the bucky device 51B for supine photography. It can also be used by being inserted between them or being applied to the patient's body on the bucky device 51B for lying position photography. In this case, the portable radiation 52P or the radiation source 52A installed in the photographing room R1 Either of these can be used.

  In the present embodiment, the console 58 also functions as an image processing device. When image data D or the like is transmitted from the radiographic image capturing device 1, offset correction, gain correction, and defective pixels are based on the data. A radiographic image is generated by performing precise image processing such as correction and gradation processing according to the imaging region.

[How to detect the start of radiation irradiation]
Next, a new radiation irradiation detection method found by the present inventors in the radiographic imaging apparatus 1 according to the present embodiment will be described. As the detection method, for example, one of the following two detection methods can be employed.

[Detection method 1]
For example, before the radiation image capturing apparatus 1 is irradiated with radiation in the radiation image capturing, it is possible to repeatedly perform the reading process of the leak data dleak. For details of this detection method, refer to Patent Document 6 described above.

  Here, as shown in FIG. 9, the leakage data dleak is a charge q leaked from each radiation detection element 7 via each TFT 8 which is in an OFF state in a state where an OFF voltage is applied to each scanning line 5. This data corresponds to the total value for each signal line 6.

  In the readout process of the leak data dleak, unlike the readout process of the image data D shown in FIG. 6, an off voltage is applied to each line L1 to Lx of the scanning line 5, as shown in FIG. The readout circuit 17 is made to perform readout processing in a state where each TFT 8 is in an off state.

  Specifically, as shown in FIG. 10, in the state where each TFT 8 is turned off by applying an off voltage to each line L1 to Lx of the scanning line 5, the correlation circuit of each readout circuit 17 from the control means 22 is correlated. Pulse signals Sp1 and Sp2 are transmitted to the sampling circuit 19 (see CDS in FIGS. 3 and 4).

  When the pulse signal Sp <b> 1 is transmitted from the control unit 22, the correlated double sampling circuit 19 holds the voltage value Vin output from the amplifier circuit 18 at that time. Then, when the charge q leaked from each radiation detection element 7 is accumulated in the capacitor 18b of the amplifier circuit 18 via each TFT 8 and the voltage value output from the amplifier circuit 18 rises, the pulse signal Sp2 is sent from the control means 22 to the capacitor 18b. When transmitted, the correlated double sampling circuit 19 holds the voltage value Vfi output from the amplifier circuit 18 at that time.

  And the value which the correlated double sampling circuit 19 calculated and output the difference Vfi−Vin of the voltage value becomes the leak data dleak. The leak data dleak is then converted into a digital value by the A / D converter 20 as in the case of the image data D reading process described above. In this way, the reading process of the leak data dleak is performed.

  However, in each radiation detection element 7, so-called dark charges (also referred to as dark current) are constantly generated due to thermal excitation or the like due to the heat (temperature) of each radiation detection element 7 itself. For this reason, when only the reading process of the leak data dleak is repeatedly performed, each TFT 8 remains in an off state, and the dark charge generated in each radiation detection element 7 is continuously accumulated in each radiation detection element 7. Become.

  Therefore, in this detection method 1, as shown in FIG. 11, the leakage data dleak is read in a state in which the off voltage is applied to each scanning line 5, and the on voltage is sequentially applied to each line L <b> 1 to Lx of the scanning line 5. It is desirable that the reset processing of each radiation detection element 7 performed by applying is alternately performed.

  As described above, when the readout process of the leak data dleak and the reset process of each radiation detection element 7 are alternately performed before radiographic imaging, the radiation from the radiation source 52 (see FIGS. 7 and 8) is used. When radiation irradiation is started on the image capturing device 1, each TFT 8 is irradiated with an electromagnetic wave converted from the radiation by the scintillator 3 (see FIG. 1).

  When the electromagnetic waves are irradiated to each TFT 8 in this way, the charge q (see FIG. 9) leaking from each radiation detection element 7 through each TFT 8 increases accordingly. I know.

  Then, for example, as shown in FIG. 12, when the readout process of the leak data dleak and the reset process of each radiation detection element 7 are alternately performed before radiographic imaging, as shown in FIG. The leak data dleak read out at the time when the irradiation of radiation is started becomes much larger than the leak data dleak read out before that time.

  12 and 13, the leak data dleak read in the fourth read process after the on-voltage is applied to the line L4 of the scanning line 5 in FIG. 12 and the reset process is performed is shown in FIG. Corresponds to the leak data dleak at time t1. In FIG. 12, “R” represents a reset process for each radiation detection element 7, and “L” represents a read process for leak data dleak.

  Therefore, the control means 22 of the radiographic image capturing apparatus 1 is configured to monitor the leak data dleak read out in the read processing of the leak data dleak before radiographic image capture, and the read out leak data dleak is, for example, It can be configured to detect that radiation irradiation has started when a predetermined threshold value “dleak_th” (see FIG. 13) is reached or higher.

[Detection method 2]
Further, as shown in FIG. 14, instead of the configuration in which the leak data dleak is read before the radiographic image is captured as in the detection method 1 described above, the gate of the scanning drive unit 15 is captured before the radiographic image is captured as shown in FIG. It is also possible to apply a turn-on voltage to each of the lines L1 to Lx of the scanning line 5 from the driver 15b in order to read out the irradiation start detection data d from each radiation detection element 7. For details of this detection method, refer to Patent Document 7 described above.

  In this case, on / off of the charge reset switch 18c of the amplifier circuit 18 of the read circuit 17 and the transmission of the pulse signals Sp1 and Sp2 to the correlated double sampling circuit 19 in the read process of the irradiation start detection data d are performed. The processing is the same as the processing in the reading processing of the image data D shown in FIG. That is, the irradiation start detection data d corresponds to image data read before radiographic imaging.

  And when it was comprised so that the read-out process of the data d for irradiation start detection might be performed before radiographic imaging in this way, when irradiation of the radiation with respect to the radiographic imaging apparatus 1 is started, it was read at that time As in the case of the leak data dleak shown in FIG. 13 described above, the irradiation start detection data d is significantly larger than the irradiation start detection data d read before that.

  Therefore, the control means 22 of the radiographic image capturing apparatus 1 is configured to monitor the irradiation start detection data d read in the read process before radiographic image capturing, and the read data for irradiation start detection is read. It can be configured to detect the start of radiation irradiation when d is equal to or greater than a predetermined threshold dth set in advance.

[Processing after detection of radiation irradiation start]
When the control means 22 detects the start of radiation irradiation as described above, for example, as shown in FIG. 12 in the case of adopting the detection method 1, the control means 22 applies to each scanning line 5 at that time. The application of the on-voltage is stopped, the off-voltage is applied to each of the lines L1 to Lx of the scanning line 5 from the gate driver 15b, each TFT 8 is turned off, and it is generated in each radiation detection element 7 by radiation irradiation. A transition is made to a charge storage state in which charges are stored in each radiation detection element 7.

  In this embodiment, after a predetermined time elapses after the start of radiation irradiation is detected and the radiation irradiation is completed, the control unit 22 reads out the radiation data by, for example, reading the leak data dleak before radiographic imaging. The scanning line 5 to which the on-voltage is to be applied next to the scanning line 5 (the line L4 of the scanning line 5 in the case of FIG. 12) to which the on-voltage has been applied in the reset process immediately before the start of the irradiation is detected. Application of the on-voltage is started from the line L5 of the scanning line 5 in the case of FIG. 12, and the on-voltage is sequentially applied to each scanning line 5 to perform the reading process of the image data D.

  It is also possible to start the application of the on-voltage from the first line L1 of the scanning line 5 and sequentially apply the on-voltage to each scanning line 5 to perform the reading process of the image data D.

  On the other hand, in this embodiment, although not shown, the control means 22 repeats the same processing sequence as the processing sequence from the image data D read processing to the image data D read processing shown in FIG. The offset data O is read from the radiation detection element 7.

  The offset data O is obtained by reading out the offset due to the dark charge superimposed on the image data D for each radiation detection element 7. 1 is performed in a state where no radiation is irradiated.

  The control means 22 transmits the read image data D, offset data O, and the like to the console 58 (see FIGS. 7 and 8). Further, the console 58 generates a radiation image, a preview image, and the like based on the transmitted image data D and the like, and displays them on the display unit 58a as necessary.

  It is also possible to adopt the same configuration when adopting the detection method 2 and reading out the irradiation start detection data d before radiographic imaging.

[Configuration to prevent erroneous detection of radiation irradiation start due to vibration, etc.]
As described above, the detection method 1 and the detection method 2 are adopted as described above, and the radiographic image capturing apparatus 1 is based on the read leak data dleak and the irradiation start detection data d before capturing the radiographic image. When configured to detect the start of radiation irradiation by itself, when shock or vibration is applied to the radiation imaging apparatus 1, the value of the leaked data dleak to be read or the data d for irradiation start detection becomes abnormally large There is.

  In this way, when the value of the read leak data dleak or the data d for irradiation start detection becomes a large value and exceeds the threshold values dleak_th and dth, the radiation imaging apparatus 1 is actually irradiated with radiation. In spite of this, there is a risk of erroneous detection that radiation irradiation has started based on the read leak data dleak or the like.

  Hereinafter, a configuration and the like in the radiographic image capturing apparatus 1 and the radiographic image capturing system 50 according to the present embodiment for avoiding such problems will be described. The operation of the radiographic image capturing apparatus 1 and the radiographic image capturing system 50 according to the present embodiment will also be described.

  Here, in order to make the description easy to understand, the following description will be given in time series as an example from the time when the power consumption mode of the radiographic image capturing apparatus 1 is switched from the sleep mode to the image capturing possible mode.

  In the present embodiment, as described above, the wake-up signal is transmitted from the console 58 to the radiographic image capturing apparatus 1 or the switch (not shown) of the radiographic image capturing apparatus 1 is operated. The power consumption mode can be changed from the sleep mode to the photographing enabled mode.

  Then, at the time immediately after the power consumption mode of the radiographic image capturing apparatus 1 is changed to the radiographable mode, the dark charge generated in each radiation detection element 7 may be accumulated in each radiation detection element 7. . Therefore, in the present embodiment, the control unit 22 of the radiographic image capturing apparatus 1 changes from the gate driver 15b of the scanning drive unit 15 to each of the lines L1 to Lx of the scanning line 5 at the time when the mode is changed to the radiographable mode. The on-voltage is sequentially applied to reset each radiation detection element 7.

  At that time, as described above, the dark charge is generated by thermal excitation or the like due to the heat (temperature) of each radiation detection element 7 itself, and in general, the TFT 8 that is the switch means is in the OFF state for a long time. As the amount of dark charges accumulated in each radiation detecting element 7 increases. In the radiographable mode before the power consumption mode of the radiographic image capturing apparatus 1 is switched to the sleep mode, reset processing of each radiation detection element 7 is performed, and residual charges such as dark charges are generated from within each radiation detection element 7. Is considered to have been removed.

  Therefore, at the time immediately after the power consumption mode of the radiographic image capturing apparatus 1 is changed to the radiographable mode, it is considered that an amount of dark charge corresponding to the duration of the sleep mode is accumulated in each radiation detection element 7. It is done. That is, as the duration time of the sleep mode is longer, more dark charges are accumulated in each radiation detection element 7.

  Even if the amount of dark charge accumulated in each radiation detection element 7 increases, the dark charge is basically caused by the heat (temperature) of each radiation detection element 7 by the heat (temperature) of each radiation detection element 7. An electron-hole pair generated by excitation of electrons at a lower energy level to a higher energy level. In addition, a phenomenon occurs in which electron-hole pairs generated once excited to a high energy level are deactivated and recombined.

  Therefore, even if the longer the sleep mode duration is as described above, the more dark charges are accumulated in each radiation detection element 7, the dark charges generated in each radiation detection element 7 in the sleep mode. That is, when the amount of electron-hole pairs increases and the amount of generated electron-hole pairs and the amount of electron-hole pairs that are deactivated and recombined reach equilibrium, the amount of generated dark charges increases. After that, the amount of dark charge in each radiation detection element 7 becomes constant.

  On the other hand, if the duration time of the sleep mode is short, not much dark charges are accumulated in each radiation detection element 7, and each radiation detection element 7 is reset only for a shorter time. Dark charges can be effectively removed from the radiation detection element 7.

  Therefore, as described above, the reset processing of each radiation detection element 7 that is performed at least immediately after the power consumption mode of the radiographic image capturing apparatus 1 is changed from the sleep mode to the radiographable mode depends on the duration of the sleep mode. Thus, the number of reset processes of each radiation detecting element 7, that is, each radiation detecting element 7 performed by sequentially applying the on-voltage once to each line L 1 to Lx of the scanning line 5 from the gate driver 15 b of the scanning driving means 15. It is possible to change the number of reset processes when the reset process is a single reset process.

  In this case, for example, as shown by α in FIG. 15, the number S of reset processes of each radiation detection element 7 can be linearly varied with respect to the duration τ of the sleep mode. Further, as shown by β in FIG. 15, the duration τ of the sleep mode is divided into a plurality of regions, and the number of times S of reset processing of each radiation detection element 7 is assigned to each region. It is also possible to configure the number of times S of reset processing of the detection element 7 to vary stepwise corresponding to the duration τ of the sleep mode.

  When the power consumption mode of the radiographic image capturing apparatus 1 is the sleep mode, as described above, power is supplied only to a limited functional unit such as the wireless communication unit 42 in the radiographic image capturing apparatus 1. . Therefore, for example, when the transition to the sleep mode is instructed, the control unit 22 supplies the sleep time duration τ to the functional unit microcomputer to which power is supplied even in the sleep mode such as the microcomputer in the wireless communication unit 42. Instructing the start of counting.

  The microcomputer counts the duration τ of the sleep mode, and controls the control means 22 that is activated by supplying power when the power consumption mode of the radiation image capturing apparatus 1 is changed from the sleep mode to the image capture enable mode. Information of the duration τ from the microcomputer. Then, the control means 22 determines the number of reset processes S in accordance with the relationship shown in FIG. 15, for example, according to the notified sleep mode duration τ, and causes each radiation detection element 7 to be reset. Configured.

  On the other hand, if the detection processing for starting the irradiation of the radiation described above is started immediately after the reset processing of each radiation detection element 7 after the transition to the radiographable mode in this way, for example, the radiation image During positioning of the imaging apparatus 1, that is, when the radiographic imaging apparatus 1 is aligned with the patient's body, the patient's body or the like hits the radiographic imaging apparatus 1 or the radiographic imaging apparatus 1 hits the bed. Thus, an impact, vibration, or the like is applied to the radiation image capturing apparatus 1.

  Then, when vibration or the like is applied to the radiographic image capturing apparatus 1, the read leak data dleak (in the case of the detection method 1) and the irradiation start detection data d (in the case of the detection method 2) have large values. The threshold values dleak_th and dth are exceeded, and there is a possibility that the radiation imaging apparatus 1 may be erroneously detected as having started irradiation even though the radiation imaging apparatus 1 is not irradiated with radiation. Is as described above.

  Therefore, in the present embodiment, as described above, after performing the reset processing of each radiation detection element 7 after the transition to the radiographable mode, etc., the read leak data dleak and irradiation start detection data are immediately read out. The detection process of the irradiation start based on d is not started.

  Although the detection process is not started, it is possible to perform a read operation of the leak data dleak and the irradiation start detection data d. That is, in this case, the leak data dleak and the irradiation start detection data d are read, but the determination process (that is, the detection process) of whether or not the read leak data dleak or the like is equal to or greater than the threshold dleak_th or the like is not performed.

  However, if the detection process of the start of radiation irradiation based on the read leak data dleak or the like is not started in this way, the positioning of the radiographic image capturing apparatus 1 is completed, and the radiographer or other radiographer takes exposure of the radiation generator 55. Even if the radiation switch 56 (see FIGS. 7 and 8) is operated to irradiate the radiation image capturing apparatus 1, the radiation image capturing apparatus 1 cannot detect it.

  For this reason, in this embodiment, the control means 22 of the radiographic image capturing apparatus 1 uses the detection method 1 or the detection method 2 described above when the radiographing apparatus 1 is completely positioned by the photographers. The irradiation start detection process is started.

  In order to realize this, it is necessary to notify the control means 22 of the radiographic image capturing apparatus 1 that the positioning of the radiographic image capturing apparatus 1 has been completed. If the radiographer or the like is configured so that the radiographer or the like completes the positioning of the apparatus 1, the radiographer must be bothered to notify each time or forget to notify the radiographic imaging apparatus 1. There is also a fear.

  Therefore, in the radiographic image capturing system 50 according to the present embodiment, a detection unit that automatically transmits a signal for detecting that the positioning of the radiographic image capturing apparatus 1 is completed without the assistance of the photographer is provided. It is supposed to be. Then, the control unit 22 of the radiographic image capturing apparatus 1 determines whether or not the positioning of the radiographic image capturing apparatus 1 is completed based on the signal received from the detecting unit, and when it determines that the positioning is completed, For the first time, the detection process of the start of radiation irradiation based on the read leak data dleak is started.

  As described above, various detection means are employed as the detection means for transmitting a signal for detecting that the positioning of the radiographic imaging apparatus 1 is completed to the control means 22 of the radiographic imaging apparatus 1. Is possible. Hereinafter, various configuration examples of the detection unit will be described.

  For example, it is also possible to employ only one of these detection means. Further, for example, a plurality of types of detection means are provided, and the control means 22 of the radiographic image capturing apparatus 1 determines whether or not the positioning is completed based on each signal transmitted by the detection means. It is also possible to configure.

[Configuration Example 1 of Detection Unit]
As the detection means, as shown in FIG. 16, for example, the inside of the radiation incident surface R (see FIG. 1) of the housing 2 of the radiographic image capturing apparatus 1 or the like, that is, the portion between the radiation incident surface R and the sensor panel SP. For example, the pressure sensor 45a can be attached. In this case, a signal output from the pressure sensor 45a serving as a detection unit, that is, a pressure value is input to the control unit 22 of the radiographic image capturing apparatus 1.

  As described above, when the pressure sensor 45a is used as the detection unit, the radiographic image capturing apparatus 1 may be touched by the patient's body while a radiographer or other photographer positions the radiographic image capturing apparatus 1. Since they are separated, the signal output from the pressure sensor 45a, that is, the pressure value fluctuates with time. When the positioning of the radiation image capturing apparatus 1 is completed, the pressure value output from the pressure sensor 45a becomes substantially constant.

  Therefore, when the pressure sensor 45a is used as the detection means as described above, the control means 22 of the radiographic image capturing apparatus 1 uses the pressure signal (that is, the pressure value) received from the pressure sensor 45a as the detection means. It is possible to configure so that the positioning of the radiographic image capturing apparatus 1 is completed when the fluctuation converges.

[Configuration Example 2 of Detection Unit]
Moreover, as a detection means, as shown in FIG. 17, for example, vibrations applied to the radiographic image capturing apparatus 1 are detected at four corners in the housing 2 of the radiographic image capturing apparatus 1 or at the four corners of the sensor panel SP. A vibration sensor (also referred to as a shock sensor or the like) 45b is attached.

  In this case, the vibration signal output from the vibration sensor 45b serving as the detection means, that is, the magnitude of vibration applied to the radiographic imaging apparatus 1 is input to the control means 22 of the radiographic imaging apparatus 1. Is done.

  As described above, when the vibration sensor 45b is used as the detection unit, the radiographic image capturing apparatus 1 may be touched by the patient's body while a radiographer or other photographer positions the radiographic image capturing apparatus 1. Since they are separated, the signal output from the vibration sensor 45b, that is, the magnitude of vibration fluctuates with time. When the positioning of the radiographic image capturing apparatus 1 is completed, the magnitude of vibration output from the vibration sensor 45b becomes almost zero.

  Therefore, when the vibration sensor 45b is used as the detection means as described above, the control means 22 of the radiographic image capturing apparatus 1 receives the vibration signal (that is, the magnitude of vibration) received from the vibration sensor 45b as the detection means. It is possible to determine that the positioning of the radiographic image capturing apparatus 1 has been completed when the fluctuation of () has converged to almost zero.

[Configuration Example 3 of Detection Unit]
Moreover, as a detection means, for example, a temperature sensor 45c that detects a temperature rise of the housing 2 due to the patient's body coming into contact with the housing 2 of the radiographic imaging device 1 is provided in the housing 2 of the radiographic imaging device 1. It can be configured to be attached.

  In this case, for example, similarly to the pressure sensor 45a shown in FIG. 16, the temperature sensor 45c can be configured to be attached to the inside of the radiation incident surface R of the housing 2 and the like, for example, as shown in FIG. As described above, the temperature sensors 45c are attached to the inner portions of the four sides on the radiation incident surface R side of the housing 2 that are considered to have a higher frequency of contact with the patient's body than the other portions. It is also possible to configure.

  In this case, a signal output from the temperature sensor 45c serving as a detection unit, that is, temperature information is input to the control unit 22 of the radiation image capturing apparatus 1.

  In this way, when the temperature sensor 45c is used as the detection means, a radiographer or other photographer positions the radiographic image capturing apparatus 1, and the patient's body touches the radiographic image capturing apparatus 1 with the patient's body. During this time, the signal output from the temperature sensor 45c, that is, the temperature rises with time. Then, when the positioning of the radiographic image capturing apparatus 1 is completed, the temperature once greatly increased is gradually increased or hardly increased.

  Therefore, when the temperature sensor 45c is used as the detection unit as described above, the control unit 22 of the radiographic imaging apparatus 1 temporarily increases the increase in the temperature signal received from the temperature sensor 45c as the detection unit. After that, it is possible to determine that the positioning of the radiographic image capturing apparatus 1 is completed at a time when the radiation image capturing apparatus 1 is lowered to a predetermined increase set to a slight value.

[Configuration Example 4 of Detection Unit]
On the other hand, when the positioning of the radiographic imaging device 1 is completed, a radiographer or other radiographer puts a word such as “I will shoot” or “Do not move” toward the patient for radiographic imaging.

  Therefore, for example, as a detection means, for example, a voice recognition device (not shown) may be provided in the photographing room R1 (see FIG. 7), the portable radiation generator 55, the console 58 (see FIG. 8), or the like. Is possible.

  The voice recognition device is configured to transmit a signal when a specific keyword such as “I will shoot” or “Do not move” is recognized, and the signal is sent to the control means 22 of the radiographic image capturing device 1. Configured to be entered.

  At that time, the voice recognition device may be configured to directly input the radiographic image capturing device 1 by wireless communication or the like, or may be configured to be input via the console 58 or the like. . This also applies to the following configuration examples of the detection means.

  As described above, when the voice recognition device is used as the detection means, the radiographer or other photographer utters the specific keyword after the positioning of the radiographic image capturing device 1 is completed as described above. Therefore, the control means 22 of the radiographic imaging apparatus 1 can accurately determine that the positioning of the radiographic imaging apparatus 1 has been completed when the above signal is received from the voice recognition apparatus that is the detection means. .

[Configuration Example 5 of Detection Unit]
When the positioning of the radiation image capturing apparatus 1 is completed, a radiographer or other photographer confirms the position of the radiation field irradiated from the radiation source 52 (see FIGS. 7 and 8) of the radiation generating apparatus 55. In addition, visible light is often emitted from the radiation source 52.

  Therefore, for example, as a detection means, for example, a detection means (not shown) for detecting that the radiation generator 55 or the radiation source 52 is irradiated with visible light irradiated for confirming the position of the irradiation field from the radiation source 52. ) Can be provided. And a detection means is comprised so that a signal may be transmitted, if it detects that said visible light was irradiated from the radiation source 52. FIG.

  As described above, when the detection means for detecting the irradiation of the visible light for confirming the position of the irradiation field is used as the detection means, as described above, the radiographer or other photographer can Since the irradiation of visible light is after the positioning of the radiographic image capturing apparatus 1 is completed, the control unit 22 of the radiographic image capturing apparatus 1 receives the above signal from the detection unit, and then the radiographic image capturing apparatus 1. It is possible to accurately determine that the positioning of has been completed.

[Configuration Example 6 of Detection Unit]
When the radiographic imaging system 50 is constructed in the radiographing room R1 or the front room R2 as shown in FIG. 7, when the radiographic imaging apparatus 1 is positioned, the radiographer or other radiographer After closing the door Do through the door Do (see FIG. 7) between the imaging room R1 and the front room R2, the exposure switch 56 in the front room R2 is operated to emit radiation.

  Therefore, for example, as a detection means, as shown in FIG. 7, a detection means 45d for detecting that the door Do is closed is provided in the vicinity of the door Do between the photographing room R1 and the front room R2. It is possible to configure. And the detection means 45d is comprised so that a signal may be transmitted if it detects that the said door Do was closed.

  As described above, when the detection means 45d for detecting that the door Do between the imaging room R1 and the front room R2 is closed is used as the detection means, as described above, a radiographer or other photographer. Closes the door Do after the positioning of the radiographic image capturing apparatus 1 is completed, so that the control means 22 of the radiographic image capturing apparatus 1 receives the above-mentioned signal from the detecting means 45d and performs radiographic image capturing. It is possible to accurately determine that the positioning of the device 1 has been completed.

[Configuration Example 7 of Detection Unit]
In addition to the case shown in FIG. 7 and the case shown in FIG. 8, the radiographer and other radiographers themselves are not exposed when the radiation imaging apparatus 1 is positioned and irradiated with radiation. In order to do so, the radiation image capturing apparatus 1 is moved away before irradiation with radiation.

  Therefore, for example, as a detection means, a tag reader (not shown) is attached to the radiographic image capturing apparatus 1, and information is received from an RFID (Radio Frequency Identification) tag carried on the wrist of a radiographer or other photographer with this tag reader. It can be configured to read.

  In addition to this, it is possible to use a technique such as NFC (near field communication). This also applies to the following configuration example 8. In this configuration example 7, in order to avoid power consumption in the radiographic imaging apparatus 1, an RFID tag is provided on the radiographic imaging apparatus 1 side so that a radiographer or other radiographer carries the tag reader. Is also possible.

  A sensor such as a tag reader as a detection unit reads information from an RFID tag or the like while a radiographer or other photographer approaches the radiographic image capturing apparatus 1 and positions the radiographic image capturing apparatus 1. However, if the photographer moves away from the radiographic image capturing apparatus 1, information that could be read until then cannot be read from the RFID or the like.

  Therefore, a sensor such as a tag reader as a detecting means detects that the photographer has moved away from the radiographic image capturing apparatus 1 when information that can be read once cannot be read in this way. Configured. The sensor is configured to send a signal when detecting that the photographer has moved away.

  As described above, when a sensor such as a tag reader that detects that the photographer has moved away from the radiographic image capturing apparatus 1 is used as the detection means, the radiographer or other photographer can capture the radiographic image as described above. Since it is after the positioning of the radiographic imaging apparatus 1 is completed, the control unit 22 of the radiographic imaging apparatus 1 positions the radiographic imaging apparatus 1 when receiving the above signal from the sensor. It is possible to accurately determine that is completed.

[Configuration Example 8 of Detection Unit]
In addition, when the radiographer or the like completes the positioning of the radiographic imaging apparatus 1 and irradiates radiation, the radiographer or the like moves away from the radiographic imaging apparatus 1 as described above, and at the same time, the console 58 or the exposure switch 56 ( (See FIGS. 7 and 8).

  Therefore, for example, as a detection means, a sensor (not shown) such as a tag reader can be attached to the console 58 side or the exposure switch 56 side this time. A sensor such as a tag reader as a detection means receives information from an RFID tag or the like when a radiographer or other photographer completes positioning of the radiographic imaging apparatus 1 and approaches the console 58 or the exposure switch 56. It can be read.

  Therefore, when a sensor such as a tag reader provided on the console 58 side or the exposure switch 56 side as a detection means can read information from an RFID tag or the like in this way, the photographer can Configured to detect approaching. The sensor is configured to send a signal when detecting that the photographer is approaching.

  As described above, when a sensor such as a tag reader that detects that the photographer has approached the console 58 side or the exposure switch 56 side is used as the detection means, as described above, the photographer such as a radiographer or the like. Is close to the console 58 side or the exposure switch 56 side after the positioning of the radiographic imaging apparatus 1 is completed, and the control means 22 of the radiographic imaging apparatus 1 receives the above signal from the sensor. Thus, it is possible to accurately determine that the positioning of the radiation image capturing apparatus 1 has been completed.

[Configuration Example 9 of Detection Unit]
In addition to the case shown in FIG. 7 and the case shown in FIG. 8, the radiographer or other radiographer, when the radiation imaging apparatus 1 completes the positioning and irradiates the radiation, the radiation generator 55. Always hold the exposure switch 56.

  Therefore, for example, as shown in FIG. 19, as the detection means, for example, a detection means 45 e such as a touch sensor can be attached to the grip 56 a portion of the exposure switch 56 of the radiation generator 55. When a photographer such as a radiologist holds the exposure switch 56, the photographer's hand touches the detection means 45e such as a touch sensor.

  Therefore, the detection means 45e is configured to send a signal when it is detected that the photographer's hand touches and the exposure switch 56 is gripped by the photographer.

  As described above, when the detection means 45e that transmits a signal when it is detected that the exposure switch 56 is grasped is used as the detection means, a radiographer or other photographer can detect the exposure switch 56 as described above. Is to irradiate the radiation, and after the positioning of the radiographic imaging apparatus 1 is completed, the control means 22 of the radiographic imaging apparatus 1 receives the above signal from the sensor 45e, It is possible to accurately determine that the positioning of the radiation image capturing apparatus 1 has been completed.

  Even when any of the above configuration examples is adopted, the control unit 22 of the radiographic image capturing apparatus 1 is based on a signal for detecting that the positioning transmitted by the detecting unit is completed. It is possible to accurately and automatically determine that the positioning of the image has been completed.

  In the present embodiment, when the control means 22 of the radiographic image capturing apparatus 1 determines that the positioning has been completed as described above, for the first time at that time, the read leak data dleak or irradiation start detection is performed as described above. The radiation irradiation start detection process based on the data d is started.

  Therefore, since the radiation irradiation start detection process is not performed during the positioning of the radiographic imaging apparatus 1, even if vibration or the like is applied to the radiographic imaging apparatus 1 during positioning, radiation is thereby generated. It is possible to accurately prevent the start of irradiation from being erroneously detected.

  In addition, after the positioning of the radiographic imaging apparatus 1 is completed and before radiation irradiation is started, the radiographic imaging is performed from the detection units 45a to 45e to the control unit 22 of the radiographic imaging apparatus 1. A signal for detecting the completion of the positioning of the device 1 is automatically and accurately transmitted. Therefore, it is possible to automatically and accurately notify the radiographic image capturing apparatus 1 that the positioning of the apparatus 1 is completed and the detection process of the start of radiation irradiation should be started.

  Then, the control means 22 of the radiographic image capturing apparatus 1 confirms that the positioning of the radiographic image capturing apparatus is completed based on the signal received from the detection means before the radiation irradiation to the radiographic image capturing apparatus 1 is started. Therefore, it is possible to accurately and automatically start the radiation irradiation start detection process.

  Therefore, since the radiation irradiation start detection process is surely started at the time when radiation irradiation is started on the radiation image capturing apparatus 1, the control unit 22 of the radiation image capturing apparatus 1 performs radiation irradiation. Therefore, it is possible to accurately detect the start of the radiography, and radiographic imaging can be performed accurately.

  The control unit 22 of the radiographic image capturing apparatus 1 starts the radiation irradiation start detection process based on the leak data dleak and the like, as described above, when the read leak data dleak becomes equal to or greater than the threshold dleak_th. To detect the start of radiation irradiation (see time t1 in FIG. 13).

  Then, when the control means 22 of the radiographic image capturing apparatus 1 detects that the irradiation of radiation has started as described above, the scanning line is sent from the gate driver 15b of the scanning drive means 15 as shown in FIG. An off voltage is applied to each of the five lines L1 to Lx to shift to a charge accumulation state. Then, when the predetermined time has elapsed, the image data D is read out.

  Thereafter, the read image data D, the offset data O, and the like are transmitted to the console 58 (see FIGS. 7 and 8) by performing a process of reading the offset data O, for example.

  In the present embodiment, the console 58 displays a preview image (not shown) on the display unit 58a based on the transmitted image data D or the like, or performs offset correction or the like based on the transmitted image data D or the like. A radiological image is generated by performing precise image processing such as gain correction, defective pixel correction, and gradation processing according to the imaging region. These points are as described above.

  In the present embodiment, as described above, the radiation image capturing apparatus 1 automatically starts the radiation irradiation detection process without requiring the operation of a radiographer or other photographer. However, for this purpose, the photographer, on the contrary, has no way of confirming whether or not the radiation image capturing apparatus 1 has already started the process of detecting the start of radiation irradiation.

  Therefore, for example, when the control unit 22 of the radiographic image capturing apparatus 1 determines that the positioning of the radiographic image capturing apparatus 1 has been completed, and starts detection processing of radiation irradiation based on the read leak data dleak or the like Thus, the console 58 is configured to transmit a start signal, and the console 58 that has received the start signal indicates that the radiographic imaging device 1 has started detection processing on its display unit 58a (see FIGS. 7 and 8). Can be configured to display.

  Note that this display is not performed on the display unit 58a of the console 58, or in combination therewith, a display unit (not shown) provided in the photographing room R1, a display unit of a portable terminal (not shown) carried by the photographer, etc. It is also possible to configure so as to be displayed.

  When configured as described above, a radiographer or other radiographer looks at the display on the display unit 58a and confirms whether or not the radiographic imaging device 1 has started the detection process of the start of radiation irradiation. It becomes possible to confirm easily.

  In addition, when the radiation image capturing apparatus 1 has not started the positioning, the radiation image capturing apparatus 1 has started the radiation irradiation start detection process, or the radiation image capturing apparatus 1 is positioned. Is completed and the detection process is started normally, but if the photographer wants to stop the detection process for some reason, the photographer can instruct the radiographic imaging apparatus 1 to stop the detection process. It is desirable to be configured as described above.

  Therefore, the control means 22 of the radiographic image capturing apparatus 1 determines that the positioning of the radiographic image capturing apparatus 1 has been completed, and after starting the radiation irradiation start detection process based on the read leak data dleak, It is desirable that the detection process is stopped when an instruction to stop the detection process is given by a photographer such as an engineer.

  As described above, according to the radiographic image capturing system 50 and the radiographic image capturing apparatus 1 according to the present embodiment, the control unit 22 of the radiographic image capturing apparatus 1 receives the radiographic image capturing apparatus 1 from the detection units 45a to 45e. When the signal for detecting the completion of the positioning is received, it is determined that the positioning of the radiographic image capturing apparatus 1 is completed based on the received signal. Then, the radiation irradiation start detection process based on the leak data dleak (in the case of the detection method 1 described above) and the irradiation start detection data d (in the case of the detection method 2 described above) read for the first time at that time is started. Configured.

  Therefore, during the positioning of the radiographic image capturing apparatus 1, the control means 22 of the radiographic image capturing apparatus 1 does not perform the detection process of the start of radiation irradiation. Therefore, even if vibration or the like is applied to the radiographic image capturing apparatus 1 during positioning, it is possible to accurately prevent the start of radiation irradiation from being erroneously detected.

  In addition, after the positioning of the radiographic imaging apparatus 1 is completed and before radiation irradiation is started, the radiographic imaging is performed from the detection units 45a to 45e to the control unit 22 of the radiographic imaging apparatus 1. A signal for detecting the completion of the positioning of the device 1 is automatically and accurately transmitted. Therefore, it is possible to notify the radiographic image capturing apparatus 1 automatically and accurately that the positioning of the radiographic image capturing apparatus 1 is completed and the detection process of the start of radiation irradiation should be started.

  Then, the control means 22 of the radiographic image capturing apparatus 1 confirms that the positioning of the radiographic image capturing apparatus is completed based on the signal received from the detection means before the radiation irradiation to the radiographic image capturing apparatus 1 is started. Therefore, it is possible to accurately and automatically start the radiation irradiation start detection process.

  Therefore, since the radiation irradiation start detection process is surely started at the time when radiation irradiation is started on the radiation image capturing apparatus 1, the control unit 22 of the radiation image capturing apparatus 1 performs radiation irradiation. Therefore, it is possible to accurately detect the start of the radiography, and radiographic imaging can be performed accurately.

  As described above, according to the radiation image capturing system 50 and the radiation image capturing apparatus 1 according to the present embodiment, the radiation image capturing apparatus 1 detects the start of radiation irradiation until the positioning of the radiation image capturing apparatus 1 is completed. When the process is not performed and the positioning of the radiographic imaging apparatus 1 is completed, the process for detecting the start of radiation irradiation is started automatically and accurately.

  The radiographer or the like does not need to perform a special operation for appropriately operating the radiographic imaging device 1 in this way, and only performs a normal operation in radiographic imaging, and the radiographic imaging device 1. Automatically starts the radiation irradiation detection process, and the radiographic imaging system 50 including the radiographic imaging apparatus 1 is convenient for the photographer.

  In the above-described embodiment, the configuration examples of the detection unit have been described with some configuration examples. However, the detection unit is not limited to those illustrated in each of the above configuration examples, and the radiographic imaging apparatus 1 As long as it is possible to detect the completion of positioning, other forms of detection means can be employed.

  For example, as described in [Configuration Example 5 of the detection unit], when the radiographer or the like completes the positioning of the radiographic image capturing apparatus 1, the radiographer 52 (see FIGS. 7 and 8). In order to confirm the position of the radiation field irradiated from (1), visible light is irradiated from the radiation source 52.

  At the same time, the position of the radiation source 52 is often adjusted for alignment of the irradiation field, that is, so that the radiation is irradiated to the correct position. Therefore, for example, the radiation source 52 is provided with detection means (not shown) for detecting a change in its position, and the radiation from the detection means directly to the control means 22 of the radiographic imaging apparatus 1 or via the console 58. It can also be configured to emit a signal indicating that the position of the source 52 has been varied.

  Further, for example, when the exposure switch 56 of the radiation generating device 55 is of a type that is accommodated in a holder (not shown) when not in use, for example, it is detected that the exposure switch 56 has been removed from the holder. It is also possible to provide a detecting means for transmitting.

  Even with the configuration described above, the control unit 22 of the radiographic image capturing apparatus 1 appropriately determines that the positioning of the radiographic image capturing apparatus 1 has been completed based on the signal received from the detection unit, and reads out. In addition, it is possible to appropriately start the radiation irradiation start detection process based on the leak data dleak or the like.

  On the other hand, in the description of the above embodiment, the number S of reset processes of each radiation detection element 7 performed when the power consumption mode of the radiation image capturing apparatus 1 is changed from the sleep mode to the image capture enable mode is expressed as sleep. It has been described that it is possible to configure the mode to vary depending on the mode duration τ (see FIG. 15).

  At that time, in consideration of the period of the imaging possible mode before entering the sleep mode, if the period of the imaging possible mode is short, the reset processing of each radiation detection element 7 is not sufficiently performed, and each radiation There is a possibility that the sleep mode is changed in a state where a large amount of electric charge remains in the detection element 7.

  And when the period of the imaging | photography possible mode is short in this way and many electric charges remain | survive in each radiation detection element 7, just because duration τ of the subsequent sleep mode was short, If the number S of reset processes is reduced, the reset process of each radiation detection element 7 is not sufficiently performed, so that there is a possibility that the remaining amount of charges in each radiation detection element 7 increases.

  Therefore, as described above, the number of times S of reset processing of each radiation detection element 7 performed when the power consumption mode of the radiographic image capturing apparatus 1 is changed from the sleep mode to the radiographable mode is set as the duration τ of the sleep mode. In addition to this, it is possible to make it variable depending on the length of the period of the previous photographing enabled mode.

  At that time, the period of the imageable mode before the transition to the sleep mode generally affects the remaining amount of charge in each radiation detection element 7 because the period of the imageable mode is very short. Only if. In other words, when the imaging mode is continued for a certain period or longer, it is considered that the reset processing of each radiation detection element 7 is sufficiently performed, and almost no electric charge remains in each radiation detection element 7. Absent.

  Therefore, in the above case, for example, when the period of the imageable mode before the transition to the sleep mode is within a predetermined period set to a short time, the sleep mode duration τ is set as described above. It is possible to vary the number S of reset processes for each radiation detection element 7 as the number obtained by adding a predetermined number to the number S set based on this.

  Further, the number S of reset processes of each radiation detection element 7 performed when the power consumption mode of the radiographic imaging apparatus 1 is changed from the sleep mode to the radiographable mode is variable based on the duration τ of the sleep mode. The processing to be performed can be applied to the radiographic imaging device 1 configured to perform detection processing of radiation irradiation start by the device itself based on the leak data dleak or the like, as in the above embodiment. It is not limited to the case of applying to such a radiographic imaging device 1.

  That is, for example, the present invention can be applied to a radiographic imaging system configured to exchange signals and the like between the radiographic imaging device and the radiation generation device 55 and perform radiographic imaging in cooperation with each other. It is. Even in such a radiographic imaging system, when the console 58 switches the power consumption mode of the radiographic imaging apparatus from the sleep mode to the radiographable mode, the number of times S that is variably set as described above is set. The radiation detection element 7 is configured to be reset.

  Needless to say, the present invention is not limited to the above-described embodiments and modifications, and can be appropriately changed without departing from the gist of the present invention.

DESCRIPTION OF SYMBOLS 1 Radiation imaging device 5 Scan line 6 Signal line 7 Radiation detection element 8 TFT (switch means)
15 Scanning drive means 17 Reading circuit 22 Control means 45a-45e Detection means 45a Pressure sensor (detection means)
45b Vibration sensor (detection means)
45c Temperature sensor (detection means)
50 Radiation Imaging System 52 Radiation Source 55 Radiation Generator 56 Exposure Switch 58 Console 58a Display D Image Data d Irradiation Start Detection Data dleak Leak Data (Data)
Do Door q Charge R1 Shooting room R2 Front room

Claims (16)

A plurality of scanning lines and a plurality of signal lines;
A plurality of radiation detection elements arranged two-dimensionally;
Scanning drive means for switching on and applying an on-voltage and an off-voltage to each scanning line;
Switch means connected to each of the scanning lines and causing the signal lines to discharge charges accumulated in the radiation detection element when an on-voltage is applied;
A readout circuit that converts the electric charge emitted from the radiation detection element into image data and reads the image data;
Prior to radiographic imaging, a radiation irradiation start detection process is performed based on the data read out by the readout circuit, and at least the scan driving means and the readout circuit are controlled after detection of the radiation irradiation start. Control means for reading out the electric charges emitted from the radiation detection elements as image data,
A radiographic imaging device comprising:
A radiation generator comprising: a radiation source that irradiates radiation to the radiation imaging apparatus; and an exposure switch that inputs an instruction to start radiation irradiation from the radiation source;
Detecting means for transmitting a signal for detecting that the positioning of the radiographic apparatus has been completed;
With
When the control unit of the radiographic image capturing apparatus determines that the positioning of the radiographic image capturing apparatus is completed based on the signal received from the detecting unit, the radiation irradiation start detection process based on the read data Radiation imaging system characterized by starting The control means of the radiographic image capturing apparatus includes:
The charge leaked from each radiation detection element via each switch means in a state where an off voltage is applied to each scan line from the scan driving means to turn off each switch means before radiographic image capturing. Is configured to perform a reading process of leakage data that is read as leakage data, and to perform a detection process of radiation irradiation start based on the read leakage data,
The radiation irradiation start detection process based on the read leak data is started when it is determined that positioning of the radiographic imaging device is completed based on the signal received from the detection means. The radiographic imaging system according to 1. The control means of the radiographic image capturing apparatus includes:
Prior to radiographic imaging, an on-voltage is sequentially applied from the scanning drive means to each scanning line to perform reading processing of irradiation start detection data, and based on the read irradiation start detection data, It is configured to perform the irradiation start detection process,
When it is determined that the positioning of the radiographic imaging device is completed based on the signal received from the detection means, the radiation irradiation start detection process is started based on the read irradiation start detection data. The radiographic imaging system according to claim 1. The detection means is a pressure sensor attached to the radiographic apparatus;
The control means of the radiographic imaging apparatus determines that the positioning of the radiographic imaging apparatus has been completed when the fluctuation of the signal of the pressure received from the pressure sensor that is the detection means has converged. The radiographic imaging system according to any one of claims 1 to 3. The detection means is a vibration sensor attached to the radiographic imaging apparatus;
The control means of the radiographic imaging apparatus determines that the positioning of the radiographic imaging apparatus is completed when the fluctuation of the signal of the vibration received from the vibration sensor as the detection means has converged. The radiographic imaging system according to any one of claims 1 to 4. The detection means is a temperature sensor attached to the radiographic imaging device,
The control unit of the radiographic image capturing apparatus is configured such that when the increase in the signal of the temperature received from the temperature sensor, which is the detection unit, once increases and then decreases to a predetermined increase, the radiographic image capturing apparatus 6. The radiographic imaging system according to claim 1, wherein the positioning is determined to be completed. The detection means is a voice recognition device, and is configured to transmit a signal when a specific keyword is recognized,
The said control means of the said radiographic imaging apparatus judges that the positioning of the said radiographic imaging apparatus was completed at the time of receiving the said signal from the said speech recognition apparatus which is the said detection means. The radiographic image capturing system according to claim 6. The detection means is configured to transmit a signal when detecting that the visible light irradiated for confirming the position of the irradiation field of the radiation from the radiation source of the radiation generating device is irradiated,
The said control means of the said radiographic imaging apparatus judges that the positioning of the said radiographic imaging apparatus was completed when the said signal was received from the said detection means. The radiographic imaging system according to claim 1. When the radiation image capturing apparatus and the radiation source of the radiation generating apparatus are in an imaging room, and the exposure switch of the radiation generating apparatus is in a front chamber,
The detection means is configured to send a signal when detecting that the door between the photographing room and the front room is closed,
The control unit of the radiographic imaging apparatus determines that the positioning of the radiographic imaging apparatus has been completed when the signal is received from the detection unit. The radiographic imaging system according to claim 1. The detection means includes
A sensor provided in the radiographic imaging device that transmits a signal when detecting that the radiographer has moved away from the radiographic imaging device, or a sensor carried by the radiographer,
The said control means of the said radiographic imaging apparatus judges that the positioning of the said radiographic imaging apparatus was completed at the time of receiving the said signal from the said sensor which is the said detection means. Item 10. The radiographic image capturing system according to any one of Items 9. With a console to control each device in the system,
The detection means is a sensor provided on the console side that emits a signal when detecting that a photographer has approached the console,
The said control means of the said radiographic imaging apparatus judges that the positioning of the said radiographic imaging apparatus was completed at the time of receiving the said signal from the said sensor which is the said detection means. Item 11. The radiographic image capturing system according to any one of Items 10. The detection means is a sensor provided on the exposure switch side that emits a signal when detecting that a photographer has approached the exposure switch,
The said control means of the said radiographic imaging apparatus judges that the positioning of the said radiographic imaging apparatus was completed at the time of receiving the said signal from the said sensor which is the said detection means. Item 12. The radiographic image capturing system according to any one of Items 11. The detection means is a sensor that is provided in the exposure switch, and that emits a signal when detecting that the exposure switch is gripped,
The said control means of the said radiographic imaging apparatus judges that the positioning of the said radiographic imaging apparatus was completed at the time of receiving the said signal from the said sensor which is the said detection means. Item 13. The radiographic image capturing system according to any one of Items 12. A console having a display and controlling each device in the system;
When the control unit of the radiographic imaging apparatus determines that the positioning of the radiographic imaging apparatus has been completed and starts the detection process of the radiation irradiation start based on the read data, the console The radiographic image capturing system according to claim 1, wherein the radiographic image is displayed on the display unit.   The control means of the radiographic image capturing apparatus determines that the positioning of the radiographic image capturing apparatus is completed, starts the radiation irradiation start detection process based on the read data, and then performs the detection process. The radiographic imaging system according to any one of claims 1 to 14, wherein when the stop is instructed, the detection process is stopped. A plurality of scanning lines and a plurality of signal lines;
A plurality of radiation detection elements arranged two-dimensionally;
Scanning drive means for switching on and applying an on-voltage and an off-voltage to each scanning line;
Switch means connected to each of the scanning lines and causing the signal lines to discharge charges accumulated in the radiation detection element when an on-voltage is applied;
A readout circuit that converts the electric charge emitted from the radiation detection element into image data and reads the image data;
Prior to radiographic imaging, a radiation irradiation start detection process is performed based on the data read out by the readout circuit, and at least the scan driving means and the readout circuit are controlled after detection of the radiation irradiation start. Control means for reading out the electric charges emitted from the radiation detection elements as image data,
With
When the control means receives a signal for detecting that the positioning of the radiographic imaging apparatus is completed, the control means determines that the positioning of the radiographic imaging apparatus is completed based on the signal, and adds the read data to the data A radiation image capturing apparatus, wherein the radiation irradiation start detection process is started.

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