JP2017136214A - Radiation image photographing system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a radiation image photographing system capable of shortening a time taken for transferring a signal value and shortening a photographing time when photographing a radiation image using a plurality of radiation image photographing devices.SOLUTION: A radiation image photographing system 50 includes radiation image photographing devices P1-P3, measurement means 54 for measuring the propriety of a radio communication environment, a control device C for controlling the transfer of signal values by a radio system from the radiation image photographing devices P1-P3, and an image processing device C for generating a radiation image. The control device C transmits a transfer request for specifying simultaneous transfer of the signal values to the image processing device C, to the plurality of radiation image photographing devices P1-P3 when it is determined that the radio communication environment is proper on the basis of the result of the measurement by the measurement means 54, and transmits a transfer request for specifying sequential transfer of the signal values to the image processing device C, to the plurality of radiation image photographing devices P1-P3 when it is determined that the radio communication environment is not proper.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a radiographic imaging system, and more particularly, to a radiographic imaging system that performs imaging using a plurality of radiographic imaging apparatuses.

  Radiographic imaging is performed using a radiographic imaging device (Flat Panel Detector) configured by arranging a plurality of radiation detection elements that generate charges according to the dose of irradiated radiation in a two-dimensional (matrix) configuration. In many cases, imaging is performed using a single radiographic imaging apparatus, but imaging may be performed using a plurality of radiographic imaging apparatuses.

  For example, when taking a long image of a relatively wide range such as the entire spinal column or all the lower limbs of a patient as a subject, for example, as shown in FIG. The imaging apparatuses P1 to P3 are loaded side by side, and a plurality of radiographic imaging apparatuses P1 to P3 are irradiated from the radiation generation apparatus 102 through the patient who is the subject H only once (that is, in one shot). There is a case where a photo is taken. Hereinafter, such long shooting may be referred to as one-shot long shooting.

  In addition to the case where long imaging is performed in a standing position as shown in FIG. 11, for example, as shown in FIG. 12, a plurality of radiographic imaging devices P1 to P3 are arranged in a horizontal direction in a holder 101. There is a case in which one-shot long imaging is performed by irradiating radiation once from above in a state where the patient who is the subject H is lying on the top plate 103 placed thereabove.

  Japanese Patent Application Laid-Open No. H10-228688 describes that two radiographic imaging devices (radiation detection units) are connected to perform one-shot long imaging. And in patent document 1, each signal value (data) read by each radiation detection element of two radiographic imaging apparatuses is described sequentially for every radiographic imaging apparatus by a wireless system etc. outside. ing.

JP 2011-224338 A

  By the way, when each signal value or the like is transferred from a plurality of radiographic imaging apparatuses by a radio system, a radiographic image is obtained as described above when the communication environment by the radio system is good, such as when there is no (or few) interference radio waves. When sequentially transferred for each imaging apparatus (that is, when signal values are transferred from the other radiographic imaging apparatus after completion of transfer of signal values from one radiographic imaging apparatus), a plurality of radiographic imaging apparatuses simultaneously Compared with the case where the signal value is transferred to (i.e., the case where the signal value is transferred independently by each radiographic imaging device regardless of other radiographic imaging devices), the signal value is transferred from the radiographic imaging device. The time required to complete the transfer of signal values from all the radiographic imaging devices after starting (hereinafter referred to as the time required to transfer signal values) becomes longer. There is a case in which shadow time becomes longer.

  On the other hand, if the wireless communication environment is poor, such as when there are many jamming radio waves, transferring the signal values from multiple radiographic imaging devices at the same time as described above takes time for communication, There is a possibility that a time-out error will be processed when the upper limit of the predetermined time is exceeded. Then, when a timeout occurs, the signal value must be retransmitted. Consequently, the time required to transfer the signal value becomes long, and the photographing time may become long.

  Then, when a radiographer or other photographer shoots by irradiating with radiation from the radiation generator, the radiographer confirms that the subject is properly captured in the radiographic image (if not properly captured) I want to move to the next shooting or the next process as soon as possible, but if the time required to transfer the signal value becomes longer as described above, I can move to the next shooting immediately. I feel inconvenient.

  In addition, the patient who is the subject must wait until the photographer confirms that the subject is properly captured in the radiographic image. However, as described above, the time required to transfer the signal value increases, and If the confirmation by the person is delayed, the time that the patient waits increases accordingly, and the burden on the patient increases.

  The present invention has been made in view of the above problems, and shortens the imaging time by reducing the time required to transfer the signal value when imaging is performed using a plurality of radiographic imaging devices. An object of the present invention is to provide a radiographic imaging system capable of performing the above.

In order to solve the above-described problem, the radiographic imaging system of the present invention includes:
A plurality of radiation image capturing devices including a plurality of radiation detection elements that generate electric charges according to the dose of irradiated radiation, and capable of wirelessly transferring signal values read from the radiation detection elements;
A measuring means for measuring the quality of the communication environment by wireless method;
A control device for controlling transfer of the signal value in a wireless manner from the plurality of radiographic imaging devices;
An image processing device that generates a radiographic image based on the signal value transferred from the radiographic imaging device;
With
The controller is
When it is determined that the wireless communication environment is good based on the measurement result of the measurement unit, the signal value is transferred from the other radiographic imaging device to the plurality of radiographic imaging devices. Transmitting the signal value transfer request to the image processing device that designates performing the simultaneous transfer for transferring the signal value without waiting for the
When it is determined that the wireless communication environment is not good based on the measurement result of the measurement means, the signal values are transferred from the other radiographic imaging devices to the radiographic imaging devices. The signal value transfer request is transmitted to the image processing apparatus which designates the sequential transfer in which the signal values are sequentially transferred after waiting for the image processing to end.

  According to the radiographic imaging system of the system as in the present invention, when imaging is performed using a plurality of radiographic imaging apparatuses, it is possible to shorten the imaging time by reducing the time required to transfer the signal value. It becomes.

It is a figure showing one structural example of the radiographic imaging system concerning this embodiment. (A) It is a figure showing the example of each image image | photographed for every radiographic imaging apparatus by 1 shot long imaging | photography, (B) It is a figure showing the example of the long image produced | generated by combining each image. . It is a perspective view showing the external appearance of a radiographic imaging device. It is a block diagram showing the equivalent circuit of a radiographic imaging apparatus. It is a figure showing the signal transmitted / received between a control apparatus and each radiographic imaging device, when the transmission request | requirement of a signal value is transmitted to each radiographic imaging device simultaneously (A) and (B) order. It is a figure showing the signal transmitted / received when a transmission request is transmitted to radiation image capturing apparatuses P2 and P3 all at once after transmitting a transfer request to radiation image capturing apparatus P1 in order. It is a figure explaining an example of the method of extracting the signal value for a preview. It is a figure showing the signal transmitted / received when (A) the signal value for a preview and each transfer request of the remaining signal values are transmitted all at once, and (B) when one transfer request is transmitted all at once. It is a figure showing the signal transmitted / received when transmitting the transfer request of the signal value for previews all at once, and transmitting the transfer request of the remaining signal value in order. (A) When transmitting the signal value for preview and each transfer request for the remaining signal values in order, and (B) Transferring the signal value for preview after transmitting the request for transferring the signal value for preview in order, It is a figure showing the signal transmitted / received when transmitting a request all at once. It is a figure showing the structural example of the imaging stand for 1 shot long imaging | photography. It is a figure showing the example of a structure of the imaging stand for 1 shot long imaging | photography for a supine position imaging | photography.

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

  In the following, a case will be described in which three radiographic imaging devices are mounted side by side on a holder for an imaging stand for long imaging, and one shot long imaging is performed. However, the present invention is not limited to this case. (It is not limited to the case where there are three radiographic imaging devices.) Any radiographic imaging system that performs imaging using a plurality of radiographic imaging devices and transfers signal values from the plurality of radiographic imaging devices. It can be applied to other forms of systems.

  In the following, a case will be described in which the one-shot long imaging table loaded with the three radiographic imaging devices is an upright imaging table. As shown in FIG. The shooting table for long shooting may be a shooting table for supine shooting.

[Configuration example of radiation imaging system]
FIG. 1 is a diagram illustrating a configuration example of a radiographic image capturing system 50 according to the present embodiment (that is, a configuration example when performing one-shot long imaging as described above). As shown in FIG. 1, in the present embodiment, an imaging stand 51 for one-shot long imaging that can be loaded with a plurality of radiographic imaging devices P1 to P3 for performing long imaging is arranged in the imaging room Ra. Has been. The imaging stand 51 can be loaded with a plurality of radiographic imaging devices P1 to P3 so as to be arranged in the holder 51a in the vertical direction.

  In the following description, when the radiographic image capturing apparatuses P1 to P3 are described without distinction or when one radiographic image capturing apparatus is represented, the radiographic image capturing apparatus P is referred to. In the following, as shown in FIG. 1, a case will be described in which the holder 51a of the imaging stand 51 is configured to be loaded with three radiographic imaging devices P. The number of radiographic imaging devices P loaded on the platform 51 is not limited to three, and the number of radiographic imaging devices P that can be loaded may be two or four or more.

  In the radiographing room Ra, a radiation generating device 52 is provided. As shown in FIG. 1, the radiation generating device 52 used for long imaging is loaded on the imaging table 52A through a patient who is the subject H. A plurality of radiation image capturing apparatuses P1 to P3 can be irradiated with radiation once to perform long image capturing (that is, one shot long image capturing).

  In addition, the imaging room Ra is provided with a repeater 54 for relaying communication between the devices in the imaging room Ra and the devices outside the imaging room Ra. The repeater 54 is provided with an access point 53 so that the radiographic imaging devices P1 to P3 can transmit and receive the signal value D and various signals in a wireless manner. The repeater 54 is connected to the control unit (generator) 55 and the console C of the radiation generator 52.

  As shown in FIG. 1, the front room (also referred to as an operation room or the like) Rb is provided with an operation console 57 of a radiation generator 52, which is operated by a radiographer or other photographer. An exposure switch 56 is provided for instructing the radiation generator 52 to start radiation irradiation.

  Further, in the front room Rb, there is a console C composed of a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory), an input / output interface, etc., which are not shown, connected to the bus. Is provided. The console C is provided with a display unit Ca configured by a CRT (Cathode Ray Tube), an LCD (Liquid Crystal Display), or the like, and is provided with input means such as a mouse and a keyboard (not shown). In addition, the console C is connected to or has a built-in storage means Cb composed of an HDD (Hard Disk Drive) or the like.

  In the present embodiment, the console C functions as a control device of the present invention that controls transfer of the signal value D from the plurality of radiographic imaging devices P1 to P3 in a wireless manner. This point will be described in detail later. Further, hereinafter, the console C as the control device may be referred to as the control device C. In the present embodiment, an example in which the console C functions as a control device is shown in this way. However, the present invention is not limited to this, and for example, the control device may be a device different from the console. Moreover, the radiographic image capturing device P may have the function of the control device. And when the radiographic imaging device P is provided with the function of the control device, the control devices of the radiographic imaging devices P1 to P3 cooperate with each other, and the image processing device described later from each radiographic imaging device P Configured to control the transfer of the signal value D to the.

  In the present embodiment, the above-described repeater 54 is configured to be able to measure the radio wave reception intensity I by the wireless method at the access point 53. And the repeater 54 transmits the information of the measured radio wave reception intensity | strength I to the console C as a control apparatus.

  In the present embodiment, the console C is also configured to function as an image processing apparatus of the present invention that generates a radiographic image based on the signal value D transferred from the radiographic imaging apparatuses P1 to P3. Hereinafter, the console C as the image processing apparatus may be referred to as an image processing apparatus C. It is also possible to configure the image processing device as a separate device from the console C.

Specifically, when the signal value D and the offset data O are transferred from the radiographic imaging apparatuses P1 to P3, the image processing apparatus C detects each radiation of the radiographic imaging apparatuses P1 to P3 according to the following equation (1). The true signal value D ^* is calculated by subtracting the offset data O from the signal value D for each element 7, and gain correction, defective pixel correction, and gradation corresponding to the imaging region are calculated for the calculated true signal value D ^* . Precise image processing such as processing is performed to generate images p1 to p3 for each of the radiographic imaging devices P1 to P3, as shown in FIG.
D ^* = DO (1)

  At this time, in this embodiment, as shown in FIG. 1, when viewed from the radiation generating device 52 side, the end portions of the radiographic imaging devices P <b> 1 to P <b> 3 overlap each other in the holder 51 a of the imaging table 51. Therefore, in the generated image, a component due to the casing 2 (see FIG. 3 described later) of the front radiation image capturing apparatus P, an internal structure, or the like is reflected in the image. Therefore, the image processing apparatus C performs processing for removing those components from the image as necessary, and then combines the images p1 to p3 to create a long image plong as shown in FIG. Is supposed to generate.

[About radiation imaging equipment]
Next, the radiographic imaging device P used in the radiographic imaging system will be described. FIG. 3 is a perspective view showing an appearance of the radiographic image capturing apparatus. In the present embodiment, the radiographic imaging apparatus P is configured by housing a radiation detection element 7 and the like, which will be described later, in a housing 2, and a power switch 25 and a changeover switch 26 are provided on one side surface of the housing 2. The connector 27, the indicator 28, etc. described above are arranged. Although not shown, in the present embodiment, an antenna 29 (see FIG. 4 below) for performing wireless communication with the outside is provided on, for example, the opposite side surface of the housing 2.

  FIG. 4 is a block diagram showing an equivalent circuit of the radiographic image capturing apparatus. As shown in FIG. 4, in the radiographic imaging apparatus P, a plurality of radiation detection elements 7 are arranged in a two-dimensional shape (matrix shape) on a sensor substrate (not shown). Each radiation detection element 7 generates a charge according to the dose of the irradiated radiation.

  A bias line 9 is connected to each radiation detection element 7, and the bias line 9 is connected to a connection 10. The connection 10 is connected to a bias power supply 14 so that a reverse bias voltage is applied from the bias power supply 14 to each radiation detection element 7 via the bias line 9 and the like.

  Each radiation detection element 7 is connected to a thin film transistor (hereinafter referred to as TFT) 8 as a switching element, and the TFT 8 is connected to the signal line 6. Further, the scanning drive means 15 is adapted to switch the on-voltage and off-voltage supplied from the power supply circuit 15a via the wiring 15c by the gate driver 15b and apply it to the lines L1 to Lx of the scanning line 5.

  Each TFT 8 is turned off when a turn-off voltage is applied via the scanning line 5, and the conduction between the radiation detection element 7 and the signal line 6 is cut off. At the time of imaging, a radiation voltage is applied to the radiographic imaging device P while each TFT 8 is in an off state by applying an off voltage to each TFT 8 through the scanning line 5 for a predetermined time. Thus, the charges generated in the radiation detection element 7 are accumulated in the radiation detection element 7.

  Further, each TFT 8 is turned on when an on-voltage is applied via the scanning line 5, and discharges charges accumulated in the radiation detection element 7 to the signal line 6. On the other hand, a plurality of readout circuits 17 are provided in the readout IC 16, and the signal lines 6 are connected to the readout circuits 17, respectively.

  In the process of reading the signal value D, when charge is released from the radiation detection element 7, the charge flows into the read circuit 17 through the signal line 6, and the amplifier circuit 18 corresponds to the amount of charge that has flowed in. Output voltage value.

  Then, a correlated double sampling circuit (described as “CDS” in FIG. 4) 19 reads out and outputs the voltage value output from the amplifier circuit 18 as an analog signal value D. Then, the output signal value D is sequentially transmitted to the A / D converter 20 via the analog multiplexer 21, and is sequentially converted into a digital signal value D by the A / D converter 20 and output to the storage means 23. Are stored sequentially.

  The control means 22 is configured by a computer, a FPGA (Field Programmable Gate Array), or the like in which a CPU, ROM, RAM, input / output interface and the like (not shown) are connected to the bus. It may be configured by a dedicated control circuit. The control means 22 is connected to storage means 23 composed of SRAM (Static RAM), SDRAM (Synchronous DRAM), NAND flash memory or the like.

  In addition, a communication unit 30 that communicates with the outside by a wireless method or a wired method is connected to the control unit 22 via an antenna 29 or a connector 27. Furthermore, a built-in power supply 24 such as a lithium ion capacitor is connected to the control means 22.

  In the present embodiment, the control means 22 of the radiographic imaging device P turns off each TFT 8 for a predetermined time in a state where the radiation imaging device P is not irradiated with radiation before or after imaging, and then In the same manner as described above, the charge accumulated in each radiation detection element 7 is read out by the readout circuit 17 so that the offset data O (refer to the above formula (1)) due to the dark charge (also referred to as dark current) is obtained. It is acquired and transferred to the image processing apparatus C.

  In the present embodiment, the control means 22 of the radiographic image capturing apparatus P performs image processing on the signal value D read out as described above when there is a transfer request of the signal value D from the control apparatus C as will be described later. The data is transferred to the device C by a wireless method. At this time, in the present embodiment, the communication unit 30 (see FIG. 4) of the radiographic image capturing apparatus P transfers the signal value D by the wireless method via the antenna 29, and the signal value D per unit time. A transfer amount ΔQ and a unit amount of signal value D (for example, a signal value D corresponding to one image (for example, the image p1 described above)) can be measured. ing.

[How to request signal value transfer from control unit]
Next, in the radiographic image capturing system 50 according to the present embodiment, a method for requesting transfer of the signal value D and the like from the control device C to each of the radiographic image capturing devices P1 to P3 is specifically described with some embodiments. explain. The operation of the radiographic image capturing system 50 according to each embodiment will also be described.

[First Embodiment]
In the radiographic image capturing system 50 according to the first embodiment of the present invention, the signal value D is transferred from the radiographic image capturing apparatuses P1 to P3 to the image processing apparatus C after the image capturing (for example, after one-shot long image capturing). The principle of how to request transfer of the signal value D to each of the radiographic imaging devices P1 to P3 in the control device C according to the present invention will be described.

  In this embodiment, the control apparatus C determines whether the communication environment by a radio | wireless system is favorable based on the measurement result of a measurement means.

  In this case, the measuring means of the present invention for measuring the quality of the communication environment by the wireless system is, for example, the above-described repeater 54 (see FIG. 1), and the access point in which the measurement result of the measuring means is measured by the repeater 54. The radio wave reception intensity I can be set to 53 by the wireless method. In addition, it is also possible to comprise so that the radio wave reception intensity | strength I may be measured with apparatuses other than the repeater 54, and the said apparatus will be a measurement means in that case.

  Then, for example, a threshold value Ith is set in advance in the radio wave reception intensity I, and the control device C uses a wireless method when the radio wave reception intensity I measured by the measuring means such as the repeater 54 is equal to or greater than the threshold value Ith When it is determined that the communication environment is good and the radio wave reception intensity I is less than the threshold value Ith, it is possible to determine that the communication environment by the wireless method is not good.

  In addition, the measurement unit of the present invention that measures the quality of the communication environment by the wireless method is, for example, the communication unit 30 (see FIG. 4) of the radiation image capturing apparatus P, and the measurement result of the measurement unit is measured by the communication unit 30. It is also possible to set the transfer amount ΔQ per unit time of the signal value D when the signal value D is transferred by the wireless method via the antenna 29 or the time τ required for transferring the signal value D of the unit amount.

  Also in this case, for example, the threshold value ΔQth and the threshold value τth are set in advance for the transfer amount ΔQ per unit time of the signal value D and the time τ required to transfer the signal value D of the unit amount. Then, the control device C is configured such that the transfer amount ΔQ per unit time of the signal value D measured by the measuring means (that is, the communication unit 30 of the radiographic imaging device P in this case) is equal to or greater than the threshold value ΔQth, When the time τ required for transferring the signal value D is equal to or less than the threshold τth, it is determined that the communication environment by the wireless method is good. Further, the control device C has a case in which the transfer amount ΔQ per unit time of the signal value D measured by the measuring unit is less than the threshold value ΔQth, or the time τ required to transfer the unit value signal value D is greater than the threshold value τth. In this case, it can be configured to determine that the communication environment by the wireless method is not good.

  And in this embodiment, when it determines with the control apparatus C having a favorable communication environment by a radio | wireless system based on the measurement result of a measurement means, with respect to several radiographic imaging apparatus P1-P3, others A signal value D transfer request is transmitted to the image processing apparatus C which designates performing simultaneous transfer for transferring the signal value D without waiting for the transfer of the signal value D from the radiation image capturing apparatus P to end. In addition, when it is determined that the communication environment by the wireless method is not good based on the measurement result of the measuring unit, the plurality of radiographic image capturing apparatuses P1 to P3 are compared with the other radiographic image capturing apparatuses P. A signal value D transfer request is transmitted to the image processing apparatus which designates that sequential transfer is performed in which the signal value D is transferred in order after the transfer of the signal value D is completed.

  Specifically, as described above, in this embodiment, when the measurement unit (the repeater 54, the communication unit 30 of the radiographic imaging apparatus P, etc.) measures the quality of the communication environment by the wireless method, the measurement result (radio wave reception) The transfer amount ΔQ per unit time of the intensity I and the signal value D, the time τ required for transferring the signal value D of the unit amount, etc.) are transmitted to the control device C. In the following, a case where the repeater 54 is a measuring unit and the measurement result is the radio wave reception intensity I will be described. However, the communication unit 30 of the radiographic image capturing apparatus P is a measuring unit, and the measurement result is a signal value. The same applies to the case where the transfer amount ΔQ per unit time of D, the time τ required to transfer the signal value D of the unit amount, and the like.

  In the control device C, the above-described threshold value Ith is set in advance, for example. On the other hand, the control device C stores the radio wave reception intensity I measured and transmitted by the repeater 54 when the signal value D is transferred from the radiation image capturing device P to the image processing device C in advance. Store it in a memory such as

  At that time, as described above, the radio wave reception intensity I is determined by the transfer method when the signal value D is transferred from the radiographic imaging device P to the image processing device C after the imaging to be performed from now on (that is, from the control device C to each This is a material for determining the request for transferring the signal value D to the radiographic imaging devices P1 to P3. Then, it is considered that the radio wave reception intensity I when the signal value D is transferred from the radiographic imaging apparatus P to the image processing apparatus C at the time closest to the current time is the value closest to the current radio wave reception intensity I. It is done.

  Therefore, for example, it is possible to store the radio wave reception intensity I when the signal value D is transferred from the radiographic imaging device P to the image processing device C at the previous imaging. Further, for example, when the offset image O is acquired by the radiographic imaging device P before imaging as described above and the offset data O is transferred from the radiographic imaging device P to the image processing device C before imaging, It is also possible to store the radio wave reception intensity I when transferring the offset data O.

  Alternatively, for example, before imaging, the signal value D (for example, the signal value D remaining in the storage unit 23 of the radiation image capturing apparatus P, the signal value D generated randomly, or the transfer from the radiation image capturing apparatus P) It is also possible to actually transfer the test signal value D and the like and store the radio wave reception intensity I at that time.

  The control device C reads the radio wave reception intensity I stored in the memory at the time of shooting. When the control device C determines that the radio wave reception intensity I is equal to or greater than the threshold value Ith and the communication environment by the wireless method is good, each of the radiation image capturing devices P1 to P1 from the radiation generation device 52 (see FIG. 1). As shown in FIG. 5A, when P3 is irradiated with radiation and the signal value D is read out by each of the radiographic imaging devices P1 to P3, a plurality of radiographic imaging devices P1 to P3 are provided. The transfer request of the signal value D to the image processing apparatus C that designates the simultaneous transfer for transferring the signal value D without waiting for the transfer of the signal value D from the other radiographic imaging apparatus P to be completed. Send A.

  In FIG. 5A, the simultaneous transfer for transferring the signal value D without waiting for the transfer of the signal value D from the other radiographic imaging device P to be completed, and the sequential transfer described below (that is, other transfer) Sequential transfer in which signal values D are transferred in order after waiting for the transfer of the signal values D from the radiation imaging apparatus P to be completed. A case is shown in which a transfer request A specifying that simultaneous transfer is to be performed simultaneously from the control device C to each of the radiographic imaging devices P1 to P3.

  However, in the case of simultaneous transfer, as described above, the signal value D is set without waiting for the transfer of the signal value D from the other radiographic image capturing devices P from each of the radiographic image capturing devices P1 to P3. As long as the transfer state is realized, the transfer request A specifying the simultaneous transfer from the control device C to each of the radiographic imaging devices P1 to P3 may be transmitted all at once. You may send it. Therefore, when the transfer request A for designating simultaneous transfer is transmitted from the control device C to each of the radiographic imaging devices P1 to P3, the transfer request A is sent to each of the radiographic imaging devices P1 to P3 in FIG. However, the fact that the transmission request A instructing the simultaneous transfer is transmitted to the radiographic imaging devices P1 to P3 in order is not excluded.

  Further, this is the same in the case of sequential transfer shown in FIG. 5B described later and each figure. In the case of sequential transfer, as described above, the radiographic imaging apparatuses P1 to P3 are used to change the other. It is only necessary to realize a state in which the signal value D is transferred in order after the transfer of the signal value D from the radiographic imaging device P is completed, and sequentially from the control device C to each of the radiographic imaging devices P1 to P3. As for the transmission of the transfer request A that designates the transfer, the transfer request A may be transmitted all at once or sequentially. Therefore, when the transfer request A for designating sequential transfer is transmitted from the control device C to each of the radiographic imaging devices P1 to P3, the transfer request A is sent to each of the radiographic imaging devices P1 to P3 in FIG. Is not meant to exclude the configuration in which the transfer requests A instructing the sequential transfer are transmitted to the radiographic imaging devices P1 to P3 all at once.

  When the control means 22 of the radiographic image capturing apparatus P receives the transfer request A that designates simultaneous transfer of the signal value D from the control apparatus C, as shown in FIG. The read signal value D is transferred to the image processing apparatus C by a wireless method without waiting for the transfer of the signal value D from P to end. Therefore, in this case, the signal values D are transferred from the radiographic image capturing devices P1 to P3 to the image processing device C all at once in a wireless manner. At this time, as is well known, processing such as time division is performed to control communication.

  At that time, since the radio wave reception intensity I is equal to or higher than the threshold value Ith and the communication environment by the wireless system is good, the signal values D are simultaneously transmitted from the radiographic imaging devices P1 to P3 to the image processing device C as described above. Even if transferred, the signal values D are transferred from the radiographic imaging devices P1 to P3 to the image processing device C without causing time-out error processing or the like.

  Then, when the transfer of the signal value D is completed, as shown in FIG. 5A, a transfer notification B is sent from each of the radiographic imaging devices P1 to P3 to the control device C. 5A shows a case where the transfer notification B is performed in the order of the radiographic imaging apparatuses P1, P2, and P3, but actually, the radiographic imaging apparatus that has finished transferring the signal value D. The transfer notification B is transmitted to the control device C in order from P.

  On the other hand, when the control device C reads the radio wave reception intensity I stored in the memory at the time of shooting and determines that the radio wave reception intensity I is less than the threshold value Ith and the communication environment by the wireless method is not good, As shown in FIG. 5 (B), the signal values D of the plurality of radiographic imaging devices P1 to P3 are sequentially changed after waiting for the transfer of the signal values D from the other radiographic imaging devices P to end. A transfer request A of the signal value D is transmitted to the image processing apparatus C that designates performing sequential transfer.

  Specifically, as shown in FIG. 5B, the control device C sequentially outputs the signal values D to the radiographic image capturing devices P1 to P3, for example, in the order of the radiographic image capturing devices P1, P2, and P3. A transfer request A designated to perform transfer is transmitted to the radiation image capturing apparatuses P1 to P3 in order or all at once. In response to the transfer request A, the control unit 22 of the radiographic image capturing apparatus P1 transfers the read signal value D to the image processing apparatus C in a wireless manner, and when the transfer of the signal value D ends, the radiographic image capturing apparatus P1 A transfer notification B is sent to the control device C.

  When receiving the transfer request A from the control device C that has received the transfer notification B from the radiographic image capturing device P1, the radiographic image capturing device P2 (or the radiographic image capturing device P2 itself transfers from the radiographic image capturing device P1). When the notification B is received), the signal value D is transferred to the image processing apparatus C. When the transfer of the signal value D from the radiation image capturing apparatus P3 is completed, the radiation image capturing apparatus P3 is configured to transfer the signal value D to the image processing apparatus C. In FIG. 5B and each of the following figures, the case where the transfer request A is transmitted in the order of the radiographic imaging apparatuses P1, P2, and P3 is shown, but this order is not necessarily required.

  As described above, when the signal values D are simultaneously transferred from the radiation image capturing apparatuses P1 to P3 to the image processing apparatus C, the transfer from the three radiation image capturing apparatuses P1 to P3 to the image processing apparatus C is performed. Whether or not to perform time error processing is determined depending on whether or not the processing is performed within a predetermined time. However, when the transfer of the signal value D from each radiation image capturing device P to the image processing device C is performed in order as described above, the transfer from one radiation image capturing device P to the image processing device C is predetermined. Whether or not to perform time error processing is determined depending on whether or not it is performed within the time.

  Therefore, as described above, when the radio wave reception intensity I is less than the threshold value Ith and the wireless communication environment is not good, the signal values D are transferred from the three radiographic image capturing apparatuses P1 to P3 to the image processing apparatus C all at once. In such a case, the transfer may not be performed within a predetermined time, and a timeout error process may be performed. In the case of the transfer of the signal value D from one radiation image capturing apparatus P to the image processing apparatus C, Since the amount of the signal value D to be transferred is に な る compared to the case where the three radiographic imaging devices P1 to P3 are simultaneously transferred, the transfer is completed within a predetermined time. Therefore, time-out error processing is not performed, and time error processing is not performed for any of the radiation image capturing apparatuses P1 to P3.

  Therefore, even when the radio wave reception intensity I is less than the threshold value Ith and the communication environment by the wireless method is not good, as shown in FIG. A transfer request A of the signal value D to the image processing apparatus C that designates that sequential transfer is performed in which the transfer of the signal value D is sequentially performed after the transfer of the signal value D from the radiation image capturing apparatus P is completed. By transmitting and sequentially transferring the signal values D from the respective radiographic imaging devices P1 to P3 to the image processing device C, the signal values D of all the radiographic imaging devices P1 to P3 to the image processing device C can be obtained. It is possible to transfer the signal value D without causing timeout error processing or the like.

[effect]
As described above, according to the radiographic image capturing system 50 according to the present embodiment, when the control device C determines that the wireless communication environment is good based on the measurement result of the measurement unit, Image processing that designates simultaneous transfer for transferring the signal value D without waiting for the transfer of the signal value D from the other radiographic image capturing apparatuses P to the radiographic image capturing apparatuses P1 to P3. A transfer request of the signal value D to the device C is transmitted. Therefore, the signal values D are transferred to the image processing device C all at once without waiting for the transfer of the signal values D from the other radiation image capturing devices P from the plurality of radiation image capturing devices P1 to P3. Is done.

  In this case, since the communication environment by the wireless system is good, even if the signal values D are transferred all at once from the radiographic image capturing apparatuses P1 to P3 to the image processing apparatus C, the radiographic image capturing is performed. The signal values D can be transferred from the devices P1 to P3 to the image processing device C without causing timeout error processing or the like. For this reason, the time required to transfer the signal value D compared to when the transfer request is sequentially transmitted from the control device C to each of the radiographic imaging devices P1 to P3, even though the communication environment by the wireless method is good. Can be shortened, and the photographing time can be shortened.

  In addition, when the control device C determines that the wireless communication environment is not good based on the measurement result of the measurement unit, the control device C provides another radiographic imaging device to the radiographic imaging devices P1 to P3. A transfer request of the signal value D is transmitted to the image processing apparatus C which designates that sequential transfer is performed in which the transfer of the signal value D is sequentially performed after the transfer of the signal value D from P is completed. Therefore, the signal value D is sequentially transferred from the plurality of radiographic image capturing apparatuses P1 to P3 to the image processing apparatus C.

  In this case, if the signal values D are transferred all at once from the radiation image capturing devices P1 to P3 to the image processing device C, the wireless communication environment is not good and the transfer time of the signal value D exceeds the upper limit. The time-out error process may occur, and the signal value D may have to be retransmitted after a predetermined time. However, this increases the time required to transfer the signal value D and shortens the shooting time. become unable.

  However, in the radiographic imaging system 50 according to the present embodiment, when the wireless communication environment is not good, the control device C sequentially applies to the plurality of radiographic imaging devices P1 to P3 as described above. A transfer request for the signal value D is transmitted. Therefore, in this case, since the transfer from one radiation image capturing apparatus P to the image processing apparatus C is performed within a predetermined time, the time error process is not performed.

  In the above example, the signal value D is transferred from each of the three radiographic imaging devices P1 to P3 to the image processing device C. In any of these transfers, time error processing is not performed. By configuring, when the communication environment by the wireless system is not good, compared to the case where the signal values D are transferred all at once from the radiation image capturing apparatuses P1 to P3 to the image processing apparatus C and time-out error processing is performed, It is possible to reduce the time required to transfer the signal value D, and it is possible to reduce the shooting time.

  As described above, in the radiographic image capturing system 50 according to the present embodiment, when imaging is performed using a plurality of radiographic image capturing apparatuses P, control is performed according to whether or not the wireless communication environment is good. By appropriately switching the transmission method of the transfer request of the signal value D from the device C to each of the radiographic image capturing devices P1 to P3, the time required to transfer the signal value D can be accurately shortened, and the imaging time can be accurately determined. It can be shortened.

  As described above, as a measurement result of the measuring means, either the wireless reception intensity I and the transfer amount ΔQ per unit time of the signal value D (or the time τ required to transfer the signal value D of the unit amount) One of them may be measured, but it is also possible to measure both of them to determine whether the wireless communication environment is good or bad.

  The same applies to each of the following embodiments. As described above, the control device C determines that the wireless communication environment is not good based on the radio wave reception intensity I, as shown in FIG. For example, the transfer request A for designating the sequential transfer of the signal value D in the order of the radiographic imaging apparatuses P1, P2, and P3 is transmitted, but the transfer from the first radiographic imaging apparatus P1 to the image processing apparatus C is performed. In some cases, the measured radio wave reception intensity I is greater than or equal to the threshold value Ith, and the communication environment by the wireless method may be good.

  Therefore, in such a case, the control device C transmits a transfer request A that designates simultaneous transfer of the signal value D to the other radiographic imaging devices P2 and P3 based on the measurement result. Thus, it is possible to configure to switch the transmission method of the transfer request.

[Second Embodiment]
In the first embodiment, the case where the signal value D is transferred from the radiographic imaging device P to the image processing device C after imaging has been described. However, after shooting, prior to transfer of the signal value D, a preview signal value Dpre is extracted from the read signal value D at a predetermined ratio, and the extracted preview signal value Dpre is input to the image processing apparatus C. There are also many radiographic imaging apparatuses P configured to transfer the remaining signal value D (or all signal values D) after transfer.

  Therefore, in the second embodiment, after the radiographic imaging device P transfers the preview signal value Dpre to the image processing device C in this way, the remaining signal values D (or all signal values D) are transferred. A method of requesting transfer from the control device C to each of the radiographic imaging devices P1 to P3 in the case of the above configuration will be described with some configuration examples.

  In the following, a case where the signal value Dpre for preview is transferred to the image processing apparatus C and then the remaining signal value D is transferred will be described. However, after the transfer of the signal value Dpre for preview, The same applies to the case where all signal values D are transferred.

  Further, when the preview signal value Dpre is transferred from each of the radiographic imaging apparatuses P1 to P3, the image processing apparatus C is configured to transfer the offset data O before imaging as described above. In this case, the offset data O is subtracted from the preview signal value Dpre in the same manner as the above equation (1), and simple image processing is performed on the calculated subtraction value to obtain preview images p_pre1, p_pre2, and p_pre3 (illustrated). , But the main images p1 to p3 (for example, images similar to those shown in FIG. 2A) are generated.

  Then, the image processing apparatus C displays the generated preview images p_pre1, p_pre2, and p_pre3 on the display unit Ca (see FIG. 1). Then, the radiographer or other radiographer looks at the preview images p_pre1, p_pre2, and p_pre3 displayed on the display unit Ca of the image processing apparatus C to determine whether re-imaging is necessary.

  Further, as a method of extracting the preview signal value Dpre in the radiographic imaging device P, for example, a predetermined value as shown by hatching in FIG. 7 from the read signal value D (n, m) is used. The signal value D (n, m) read from each radiation detection element 7 connected to the scanning line 5 designated at a rate of one for every number (four in the case of FIG. 7) of scanning lines 5 Can be extracted and used as a preview signal value Dpre.

  7, L1, L2,... Represent the lines L1, L2,... (See FIG. 4) of the scanning line 5, and D (n, m) represents the radiation detecting elements 7 arranged in a two-dimensional manner. The image data D read from the radiation detection element 7 (n, m) in the n-th row and the m-th column is shown. Further, the method of extracting the preview signal value Dpre is not limited to this. For example, one of the signal values D read from the radiation detection elements 7 such as 3 × 3 or 4 × 4 is used. It is also possible to extract the signal value Dpre for preview by extracting the signal value D at the rate of each.

[Configuration example 1]
When the control device C determines that the communication environment by the wireless method is good based on the measurement result of the measurement unit, the control device C is similar to the case shown in FIG. 5A in the first embodiment. A transfer request designating that simultaneous transfer is to be performed from C to each of the radiographic imaging apparatuses P1 to P3 can be configured.

  That is, in this case, the controller C required transfer of the radio wave reception intensity I stored in the memory (or the transfer amount ΔQ per unit time of the signal value D described above or the signal value D of the unit amount at the time of shooting). Read time τ, etc.). When the control device C determines that the radio wave reception intensity I is equal to or higher than the threshold value Ith and the communication environment by the wireless method is good, as shown in FIG. 8A, a plurality of radiographic imaging devices P1 -P3 is an image that designates the simultaneous transfer for transferring the preview signal value Dpre without waiting for the transfer of the preview signal value Dpre from the other radiographic imaging device P to be completed. A transfer request Apre of the signal value Dpre for preview to the processing device C is transmitted.

  When there is a transfer request Apre that designates simultaneous transfer of the preview signal value Dpre from the control device C, the control means 22 of the radiographic imaging apparatus P performs the above processing from the read signal value D as described above. The signal value Dpre for preview is extracted, and the extracted signal value Dpre for preview is transferred to the image processing apparatus C by a wireless method.

  In this case, since the communication environment by the wireless method is good, even if the preview signal values Dpre are simultaneously transferred from the radiation image capturing apparatuses P1 to P3 to the image processing apparatus C, timeout error processing or the like does not occur. The signal value Dpre for preview is transferred. When the transfer of the preview signal value Dpre is completed, a transfer notification Bpre is transmitted from each of the radiographic imaging devices P1 to P3 to the control device C as shown in FIG. 8A.

  As shown in FIG. 8 (A), the control device C continues to the image processing device C that designates the simultaneous transfer of the remaining signal values D to the plurality of radiographic imaging devices P1 to P3. The transfer request A for the remaining signal value D is transmitted. Then, the remaining signal values D are transferred from the radiographic imaging devices P1 to P3 to the image processing device C all at once. In this case, too, a wireless communication environment is good, and timeout error processing and the like occur. The remaining signal values D are transferred without any change. When the transfer of the remaining signal value D is completed, a transfer notification B is sent from each of the radiographic imaging devices P1 to P3 to the control device C.

[Configuration example 2]
In the configuration example 1 described above, the transfer request Apre for designating the simultaneous transfer of the preview signal value Dpre and the remaining signal value D are simultaneously transferred from the control device C to each of the radiographic imaging devices P1 to P3. A case has been described in which the transfer request A that designates the transmission is transmitted.

However, for example, the radiographic imaging apparatus P receives a transfer request from the control apparatus C to the image processing apparatus C (referred to as a continuous transfer request A ^* in order to distinguish the transfer request in this case from other transfer requests). In this case, the preview signal value Dpre is extracted from the read signal value D and transferred, and then the remaining signal value D is transferred to the image processing apparatus C. Is possible.

In this case, when the control device C determines that the wireless communication environment is good based on the radio wave reception intensity I or the like, as shown in FIG. A continuous transfer request A ^* is transmitted to P1 to P3 all at once or sequentially. If comprised in this way, each radiographic imaging device P1-P3 which received continuous transfer request | requirement A ^* will each independently transfer the signal value Dpre for a preview to the image processing apparatus C, and each transmitted transmission notification Bpre. Thereafter, the remaining signal value D is continuously transferred, and a transfer notification B is transmitted from each of the radiographic imaging devices P1 to P3 to the control device C.

Therefore, if the control device C determines that the wireless communication environment is good based on the radio wave reception intensity I or the like, the control device C sends the continuous transfer request A ^* to the radiographic imaging devices P1 to P3 all at once or If the transmission is performed in order, the signal value Dpre for preview and the remaining signal value D are automatically and simultaneously transferred from the radiation image capturing apparatuses P1 to P3 to the image processing apparatus C.

[Configuration example 3]
Further, for example, as in the case of the above configuration example 1, the signal value Dpre for preview that designates simultaneous transfer of the signal value Dpre for preview from the control device C to each of the radiographic imaging devices P1 to P3. Is transmitted, but the radio wave reception intensity I when the radiographic imaging devices P1 to P3 transfer the preview signal value Dpre to the image processing apparatus C is monitored. For example, the radio wave reception intensity I at that time is monitored. Is less than the threshold value Ith, and the control device C sequentially determines the remaining signal values D for the plurality of radiographic imaging devices P1 to P3 as shown in FIG. It is also possible to configure so that the transfer request transmission method is switched so as to transmit the transfer request A that designates the transfer.

[Configuration Example 4]
On the other hand, when the control device C determines that the communication environment by the wireless method is not good based on the measurement result of the measurement unit, as in the case shown in FIG. 5B in the first embodiment, As shown in FIG. 10 (A), after the control device C transmits a transfer request Apre specifying that the preview signal values Dpre are sequentially transferred to the radiographic imaging devices P1 to P3, the remaining It is possible to configure so as to transmit a transfer request A that designates sequential transfer of the signal value D.

  In this case, the transfer notification Bpre is transmitted from the radiographic imaging devices P1 to P3 to the control device C when the transfer of the preview signal value Dpre to the image processing device C is completed. When the transfer of the remaining signal value D is completed, a transfer notification B is transmitted to the control device C.

  With this configuration, when the wireless communication environment is not good, the transfer of the signal value Dpre for preview and the remaining signal value D from each radiographic imaging device P to the image processing device C is sequentially performed. As a result, the amount of the preview signal value Dpre and the remaining signal value D to be transferred is reduced to 1/3 as compared with the case where the three radiographic image capturing apparatuses P1 to P3 are simultaneously transferred.

  Therefore, both the transfer of the signal value Dpre for preview and the transfer of the remaining signal value D are completed within a predetermined time, so that the time-out error process is not performed, and each of the radiation image capturing apparatuses P1 to P3 is not performed. In either case, the preview signal value Dpre and the remaining signal value D can be transferred to the image processing apparatus C without time error processing.

[Configuration Example 5]
In this case, the control device C monitors the radio wave reception intensity I when transferring the signal value Dpre for preview from each of the radiographic imaging devices P1 to P3 to the image processing device C in order. When it is determined that the reception intensity I is equal to or greater than the threshold value Ith and the communication environment has improved, as shown in FIG. 10B, the image processing apparatus C is connected to the plurality of radiographic imaging apparatuses P1 to P3. It is also possible to configure so that the transmission method of the transfer request is switched so as to transmit the transfer request A that specifies the simultaneous transfer of the remaining signal value D.

[effect]
As described above, according to the radiographic image capturing system 50 according to the present embodiment, the control device C sends the signal value Dpre for preview and the remaining signal value D from the radiographic image capturing devices P1 to P3 to the image processing device C. (Or all signal values D. The same shall apply hereinafter), when it is determined that the wireless communication environment is good based on the measurement results of the measuring means, a plurality of radiographic imaging devices P1 to P1. A transfer request designating that simultaneous transfer of the preview signal value Dpre and the remaining signal value D to the image processing apparatus C is transmitted to P3.

  Therefore, the preview signal value Dpre and the remaining signal value D are simultaneously transferred from the plurality of radiation image capturing apparatuses P1 to P3 to the image processing apparatus C, but the communication environment by the wireless method is favorable. As described above, even if the signal value Dpre for preview and the remaining signal value D are simultaneously transferred from the radiographic imaging devices P1 to P3 to the image processing device C, image processing is performed from the radiographic imaging devices P1 to P3. The signal value Dpre for preview and the remaining signal value D can be transferred to the device C without causing timeout error processing or the like.

  For this reason, the signal value Dpre for preview and the remaining amount are compared with the case where the transfer request is sequentially transmitted from the control device C to each of the radiographic imaging devices P1 to P3, even though the communication environment by the wireless method is good. This makes it possible to reduce the time required to transfer the signal value D, and to shorten the shooting time.

  Further, when the control device C determines that the wireless communication environment is not good based on the measurement result of the measurement unit, the control device C applies the image processing device C to the plurality of radiographic imaging devices P1 to P3. A transfer request designating the sequential transfer of the preview signal value Dpre and the remaining signal value D is transmitted. Therefore, the signal value Dpre for preview and the remaining signal value D are sequentially transferred from the plurality of radiation image capturing apparatuses P1 to P3 to the image processing apparatus C.

  In this case, if the signal value Dpre for preview and the remaining signal value D are transferred all at once from the radiation image capturing devices P1 to P3 to the image processing device C, the wireless communication environment is not good, so that for previewing. The transfer time of the signal value Dpre and the remaining signal value D exceeds the upper limit and timeout error processing is performed, and after a predetermined time, the preview signal value Dpre and the remaining signal value D must be retransmitted. Although there is a possibility, the time required to transfer the signal value Dpre for preview and the remaining signal value D becomes long, and the photographing time cannot be shortened.

  However, in the radiographic imaging system 50 according to the present embodiment, when the wireless communication environment is not good, the control device C performs the preview for the plurality of radiographic imaging devices P1 to P3 as described above. The transfer request designating the sequential transfer of the signal value Dpre and the remaining signal value D is transmitted. Therefore, in this case, since the transfer from one radiation image capturing apparatus P to the image processing apparatus C is performed within a predetermined time, the time error process is not performed.

  In the above example, the signal value Dpre for preview and the remaining signal value D are transferred from the three radiographic image capturing apparatuses P1 to P3 to the image processing apparatus C. In any transfer, the time error processing is performed. Since it is not performed, the configuration as described above allows the radiographic imaging apparatuses P1 to P3 to send an image processing apparatus C with the preview signal value Dpre and the remaining signal values when the wireless communication environment is not good. Compared to the case where D is transferred all at once and time-out error processing is performed, the time required to transfer the signal value D can be shortened, and the photographing time can be shortened.

  As described above, in the radiographic image capturing system 50 according to the present embodiment, when imaging is performed using a plurality of radiographic image capturing apparatuses P, control is performed according to whether or not the wireless communication environment is good. The signal value Dpre for preview and the remaining signal value are switched by appropriately switching the transmission method of the transfer request for the signal value Dpre for preview and the remaining signal value D from the device C to each of the radiographic imaging devices P1 to P3. It is possible to accurately reduce the time required for the transfer of D and to accurately reduce the shooting time.

[Configuration Example 6]
As described above, the signal value Dpre for preview is connected to each scanning line 5 designated at a rate of one for every four scanning lines 5 as shown in FIG. 7, for example. When the signal value D read from 7 is extracted and configured, the amount of the preview signal value Dpre is only ¼ of the amount of all the read signal values D (see FIG. 7). That is, if the number of signal values D read out by one radiographic imaging apparatus P is N, the number of preview signal values Dpre is N × 1/4.

  When the preview signal value Dpre is transferred from the three radiographic imaging devices P1 to P3 to the image processing device C all at once, the preview signal transferred from the three radiographic imaging devices P1 to P3 to the image processing device C is used. The number of signal values Dpre is 3 × (N × 1/4) = N × 3/4, which is only 3/4 of the number N of signal values D read out by one radiographic imaging apparatus P.

  Therefore, as in the first embodiment, when the wireless communication environment is not good, the signal values D (N) are sequentially transferred from the radiographic imaging devices P to the image processing device C. If the transfer is completed within a predetermined time, the signal value Dpre for preview is simultaneously processed from the three radiographic image capturing apparatuses P1 to P3 when the communication environment by the wireless method is not good. Even when the data is transferred to the device C, the number of preview signal values Dpre to be transferred is only N × 3/4. Therefore, the transfer ends within a predetermined time, and the timeout error process is not performed.

  Therefore, the control apparatus C not only determines that the communication environment by the wireless method is good based on the measurement result of the measuring means, but also determines that the communication environment is not good (that is, the communication environment is good). Regardless of whether the signal value Dpre for preview is transferred, simultaneous transmission of the signal value Dpre for preview to the image processing device C is performed for the plurality of radiographic imaging devices P1 to P3. It is possible to configure so as to transmit a transfer request Apre that designates to be performed.

  Then, when the control device C subsequently transfers the remaining signal values D (or all signal values D; the same applies hereinafter), the measurement result of the measuring means (the radio wave reception intensity I etc. stored in the memory) Alternatively, simultaneous transfer of the remaining signal values D to the image processing device C is performed for the plurality of radiographic imaging devices P1 to P3 based on the radio wave reception intensity I measured at the time of transferring the signal value Dpre for preview. A transfer request A specifying that the transfer is performed, or a transfer request A specifying that the remaining signal values D are sequentially transferred to the image processing apparatus C to the plurality of radiographic imaging apparatuses P1 to P3. It can be configured to determine whether to transmit.

  In this case, if the control device C determines that the wireless communication environment is good based on the measurement result of the measuring means, the control device C sends the image processing device C to the image processing device C with respect to the plurality of radiographic imaging devices P1 to P3. It is determined that a transfer request A that designates simultaneous transfer of the remaining signal value D is transmitted. Therefore, as shown in FIG. 8A, both the transfer request Apre for the signal value Dpre for preview and the transfer request A for the remaining signal value D are simultaneously transferred to the plurality of radiographic imaging devices P1 to P3. Will be specified.

  In the above case, when the control device C determines that the wireless communication environment is not good based on the measurement result of the measurement unit, the control device C performs the image processing device C on the plurality of radiographic imaging devices P1 to P3. It is determined that a transfer request A specifying that the remaining signal value D is sequentially transferred to is transmitted. Therefore, in this case, as shown in FIG. 9, the transfer request Apr of the signal value Dpre for preview designates simultaneous transfer to a plurality of radiographic imaging devices P1 to P3. The transfer request A for the remaining signal value D designates the sequential transfer to the plurality of radiographic imaging apparatuses P1 to P3.

  With this configuration, the preview signal value Dpre is simultaneously transferred from the three radiographic image capturing apparatuses P1 to P3 to the image processing apparatus C. Therefore, the time required for transferring the preview signal value Dpre is reduced. In addition to being able to shorten it appropriately, it is possible to request transfer of the remaining signal value D from the control device C to each of the radiographic imaging devices P1 to P3 depending on whether or not the communication environment by the wireless system is good. Since the transmission method is appropriately switched, the time required to transfer the remaining signal value D can be shortened appropriately. Therefore, it is possible to accurately shorten the shooting time.

[Configuration Example 7]
On the other hand, when the signal value Dpre for preview is transferred from each of the radiographic imaging devices P1 to P3 as described above, the image processing device C generates preview images p_pre1, p_pre2, and p_pre3 based on the signal values Dpre. Display on Ca (see FIG. 1). Then, a radiographer or other photographer looks at the displayed preview images p_pre1, p_pre2, and p_pre3 to determine whether or not re-imaging is necessary.

  At this time, when the imaging performed using the plurality of radiographic imaging apparatuses P1 to P3 is, for example, the one-shot long imaging (see FIG. 1) described above, as a case where re-imaging is necessary, the long imaging Long radiographing was performed with a plurality of radiographic imaging apparatuses P1 to P3 mounted side by side on the holder 51a of the radiographing table 51, but the end of the imaging region of the subject H to be imaged (such as the entire spinal column or all the lower limbs) There are relatively many cases where re-photographing is necessary because (top and bottom) is cut off and not photographed.

  Therefore, in this case, when transferring at least the preview signal value Dpre, the control device C is the end (upper and lower ends in the case of FIG. 1) of the plurality of radiographic imaging devices P1 to P3 loaded side by side. The transmission request Apre of the signal value Dpre for preview to the image processing apparatus C is transmitted to the two radiographic image capturing apparatuses P1 and P3 loaded at the position before the other radiographic image capturing apparatuses P2. It is preferable to configure.

  If comprised in this way, the preview images p_pre1 and p_pre3 by which the edge part (upper end and lower end) of the imaging | photography site | part (all the spinal column, all the lower limbs, etc.) of the to-be-photographed object H were image | photographed on display part Ca of the image processing apparatus C will be shown. The end of the imaging region of the subject H is displayed before the preview image p_pre2 that has not been imaged.

  Therefore, a radiographer or other photographer confirms whether or not the end of the imaging region of the subject H has been accurately captured in the preview images p_pre1 and p_pre3, and the end of the imaging region of the subject H is imaged. It is possible to quickly determine whether or not re-shooting is necessary without waiting for the display of the preview image p_pre2 that has not been performed.

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

7 Radiation detection element 30 Communication unit (measurement means) of radiographic imaging device
50 Radiation imaging system 51 Imaging stand 51a Holder 54 Repeater (measuring means)
A Transfer request for remaining signal values or all signal values A ^* Continuous transfer request (signal value transfer request)
Apre Request signal value transfer for preview C Console (control device, image processing device)
D signal value (signal value, remaining signal value, all signal values)
Dpre Preview signal value I Radio wave reception intensity (measurement result)
P, P1 to P3 Radiographic imaging devices P1, P3 Two radiographic imaging devices P2 loaded at the end position Other radiographic imaging devices ΔQ Transfer amount of signal value per unit time τ Unit value of signal value Transfer time

Claims (8)

A plurality of radiation image capturing devices including a plurality of radiation detection elements that generate electric charges according to the dose of irradiated radiation, and capable of wirelessly transferring signal values read from the radiation detection elements;
A measuring means for measuring the quality of the communication environment by wireless method;
A control device for controlling transfer of the signal value in a wireless manner from the plurality of radiographic imaging devices;
An image processing device that generates a radiographic image based on the signal value transferred from the radiographic imaging device;
With
The controller is
When it is determined that the wireless communication environment is good based on the measurement result of the measurement unit, the signal value is transferred from the other radiographic imaging device to the plurality of radiographic imaging devices. Transmitting the signal value transfer request to the image processing device that designates performing the simultaneous transfer for transferring the signal value without waiting for the
When it is determined that the wireless communication environment is not good based on the measurement result of the measurement means, the signal values are transferred from the other radiographic imaging devices to the radiographic imaging devices. A radiographic imaging system characterized by transmitting a signal value transfer request to the image processing apparatus which designates that sequential transfer is performed in which the signal values are transferred in order after waiting for the image data to end. Each of the plurality of radiographic image capturing apparatuses transfers a preview signal value extracted at a predetermined ratio from the read signal values, and then transfers the remaining signal values or all the signal values. Is configured as
When the control device transmits the signal value transfer request to the image processing device that designates the sequential transfer to the plurality of radiation image capturing devices, the control device transmits the signal value transfer request to the plurality of radiation image capturing devices. A request for transferring the preview signal value to the image processing device that designates performing the sequential transfer of the preview signal values, and the preview signal values from all the radiographic imaging devices are transmitted. After the transfer of the signal value is completed, the remaining signal values to the plurality of radiographic image capturing apparatuses or the remaining to the image processing apparatus that designates the sequential transfer of all the signal values are designated. The radiographic imaging system according to claim 1, wherein a transfer request for the signal value or all the signal values is transmitted. Each of the plurality of radiographic image capturing apparatuses transfers a preview signal value extracted at a predetermined ratio from the read signal values, and then transfers the remaining signal values or all the signal values. Is configured as
The controller is
When the preview signal value is transferred, the preview signal value to the image processing device that designates to perform the simultaneous transfer of the preview signal value to the plurality of radiographic imaging devices. Send a signal value transfer request,
When transferring the remaining signal values or all the signal values, the remaining signal values or all the signal values are sent to the plurality of radiographic imaging devices based on the measurement result of the measuring unit. A transfer request to the image processing device that designates performing the simultaneous transfer of the image signal, or to the image processing device that designates performing the sequential transfer of the remaining signal values or all the signal values. The radiographic imaging system according to claim 1, wherein it is determined whether a transfer request is transmitted.   When the plurality of radiographic image capturing apparatuses receive a transfer request of the signal value from the control apparatus to the image processing apparatus, each of the plurality of radiographic image capturing apparatuses independently extracts a preview extracted at a predetermined ratio from the read signal values. 2. The radiographic image capturing system according to claim 1, wherein a signal value for use is transferred, and then the remaining signal value or all the signal values are transferred to the image processing apparatus.   The radiographic imaging system according to any one of claims 1 to 4, wherein the measurement unit measures radio wave reception intensity by a wireless method as a quality of a communication environment by the wireless method.   The measuring means determines whether the signal value transfer by the wireless method or the time required to transfer the signal value of the unit amount in the transfer of the signal value by the wireless method as the quality of the communication environment by the wireless method. The radiographic imaging system according to any one of claims 1 to 4, wherein measurement is performed.   The radiographic image capturing system according to any one of claims 1 to 6, wherein the plurality of radiographic image capturing apparatuses are mounted side by side on a holder of an image capturing table for long image capturing. Each of the plurality of radiographic image capturing apparatuses transfers a preview signal value extracted at a predetermined ratio from the read signal values, and then transfers the remaining signal values or all the signal values. Is configured as
When the control device transfers at least the signal value for the preview, the control device applies to the two radiographic imaging devices loaded at the end position among the plurality of radiographic imaging devices loaded side by side. The radiographic image capturing system according to claim 7, wherein the preview signal value transfer request to the image processing apparatus is transmitted prior to the other radiographic image capturing apparatuses.

Images