JP2010240184A - Radiation image photographing system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a radiation image photographing system, further capable of saving electricity of a power source built in an FPD cassette as a radiation image detector. <P>SOLUTION: The system includes the radiation image detector to generate image data by detecting radiation generated from a radiation generator, and transmitted through an examinee, and a console to perform communication with the radiation image detector. The radiation image detector includes a radio communication means, and a battery. A start period of the radio communication means in the radiation image detector is L[ms], time while the radio communication means in the radiation image detector is started is X[ms], and a transmission period of the radio communication means of the console is N[ms], then N<L and N<X are satisfied. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a portable radiographic image detector that performs wireless communication and a radiographic imaging system that uses the radiographic image detector.

  Conventionally, for the purpose of disease diagnosis and the like, a radiographic image taken using radiation represented by an X-ray image has been widely used.

  Conventionally, such medical radiographic images have been photographed using a film as a photoconductor, but in recent years, digitization of radiographic images has been realized. For example, radiation transmitted through a subject can be converted into stimulable fluorescence. After being stored in the photostimulable phosphor sheet on which the body layer is formed, the photostimulable phosphor sheet is scanned with a laser beam, thereby photoelectrically converting the photostimulated light emitted from the photostimulable phosphor sheet. Thus, a CR (Computed Radiography) device that obtains image data has become widespread.

  Furthermore, in place of the CR device, a device using a solid state imaging device (FPD) as a detector for detecting irradiated radiation and acquiring it as digital image data has appeared, similar to the cassette of the CR device. In addition, a cassette type FPD (hereinafter referred to as an FPD cassette) configured to be portable is also used.

  Some FPD cassettes are provided with a battery as a power supply means in a detector and a wireless communication means as a communication means with an external device such as a console in order to take advantage of the portable merit.

  An X-ray digital imaging apparatus using such an FPD cassette has a control unit and wireless transmission / reception means for transmitting and receiving image signals, and the transmission / reception means of the imaging unit has directivity facing away from the radiation incident surface. 2. Description of the Related Art A radiographic image capturing apparatus having an antenna having an antenna is known (for example, see Patent Document 1).

JP 2003-210444 A

  The FPD cassette has a power source such as a battery in the cassette in order to take advantage of a portable type. In such an FPD cassette having an internal power supply unit, frequent battery replacement or charging is an obstacle to quick imaging and diagnosis. However, since the FPD cassette is compatible with the conventional apparatus, it is difficult to change the size of the casing and increase the size, and it is not easy to enclose a larger and larger capacity power source. Therefore, there is an urgent need to reduce power consumption in the FPD cassette.

  The FPD cassette in the radiographic imaging apparatus described in Patent Document 1 does not consider such a problem of power supply. For example, a console or the like that does not know when the FPD cassette set for imaging will come. In order to receive a command from the external device, it must always be activated, and there is a problem that unnecessary power consumption is forced before actual shooting.

  In view of the above problems, an object of the present invention is to provide a radiographic imaging system that can reduce the power consumption of a power source built in an FPD cassette and can capture a larger number of times even with a power source of the same capacity. It is what.

  Said subject is achieved by the following structures.

(1) In a radiographic imaging system comprising: a radiographic image detector that detects radiation generated by a radiation generating device and transmitted through a subject to generate image data; and a console that communicates with the radiographic image detector. The radiological image detector includes a radio communication unit and a battery, the activation cycle of the radio communication unit of the radiographic image detector is L [ms], and the radio communication unit of the radiographic image detector is activated. When the time is X [ms] and the transmission cycle of the console wireless communication means is N [ms],
N <L
N <X
Radiation imaging system characterized by being set to satisfy

(2) In a radiographic imaging system having a radiographic image detector that detects radiation generated by a radiation generation device and transmitted through a subject to generate image data, and a console that communicates with the radiographic image detector, The radiological image detector includes a wireless communication unit and a battery. The radio communication unit of the radiographic image detector is activated for X [ms], and the radio communication unit of the radiographic image detector is activated. The period is L [ms], the transmission period of the console wireless communication means is N [ms], the number of transmissions of the console wireless communication means is M [times] (where M is an integer of 2 or more), When the allowable delay time of the response from the radiation image detector is W [ms],
N <X
L <N × M
L ≦ W
Radiation imaging system characterized by being set to satisfy

  (3) The radiographic imaging system according to (1) or (2), wherein the setting is used at least for command communication between the radiographic image detector and the console.

  (4) The radiographic imaging system according to any one of (1) to (3), wherein a communication system of the wireless communication unit is a ZigBee system or a Bluetooth system.

  According to the present invention, it is possible to further reduce the power consumption of the power source incorporated in the FPD cassette, which is a radiation image detector, and radiographic imaging that can be performed more times even with the same capacity power source. A system can be obtained.

It is a figure which shows schematic structure of the radiographic imaging system which concerns on this Embodiment. It is a block diagram which shows the principal part structure of a FPD cassette and a console. It is a perspective view which shows the inside of an FPD cassette. It is a flowchart which shows an example of the operation | movement outline of the radiographic imaging system which concerns on this Embodiment. It is a flowchart which shows an example of the operation | movement outline of the radiographic imaging system which concerns on this Embodiment. It is the figure which showed typically the 1st example of the communication operation timing setting by the radio | wireless between the console and FPD cassette of the radiographic imaging system which concerns on this Embodiment. It is the figure which showed typically the 2nd example of the communication operation timing setting by the radio | wireless between the console and FPD cassette of the radiographic imaging system which concerns on this Embodiment.

  Hereinafter, the present invention will be described in detail with reference to embodiments, but the present invention is not limited thereto.

  FIG. 1 is a diagram showing a schematic configuration of a radiographic image capturing system 1 according to the present embodiment.

  As shown in the figure, the radiographic imaging system 1 according to the present embodiment is a system that assumes radiographic imaging performed in a hospital or clinic, and includes an FPD cassette 6 that is a radiographic image detector, A console 7 which is a control device capable of wireless communication with the FPD cassette 6 is provided. An imaging room 100 includes an imaging operation device 4 that performs operations related to radiography, an access point 5 for performing wireless communication, a radiation irradiation device 3, and a router 9.

  The access point 5 has a function of relaying these communications when the FPD cassette 6 and the console 7 communicate wirelessly within a predetermined area of the imaging room provided with the radiation irradiation device 3.

  In the radiographic image capturing system 1 according to the present embodiment, the communication method between the FPD cassette 6 and the console 7 is preferably the ZigBee method or the Bluetooth method, which is low power consumption for command communication, and the captured detailed image For transmission, a high-speed wireless LAN (for example, a communication system conforming to IEEE801.11a / b / g / n) or a certified wireless USB is preferable, but the system is not limited to this, and a system that performs communication using one kind of wireless communication system. It may be. Note that a communication system that directly performs wireless communication between the FPD cassette 6 and the console 7 without passing through the access point 5 may be used.

  The radiation irradiation device 3 is configured to irradiate a patient 12 as a subject lying on the supine position table 11 (for example, X-rays). A detection device mounting port 11a for mounting the FPD cassette 6 is provided. The radiation irradiation device 3 is controlled by the imaging operation device 4 to perform radiation imaging under predetermined imaging conditions.

  As shown in the figure, the photographing operation device 4, the access point 5, and the console 7 are configured to be connected through a network NW. Although not shown, the radiographic imaging system 1 is connected via a network NW and an HIS (Hospital Information System) that centrally manages patient diagnosis information and accounting information, and an RIS (Radiology Information System) that manages information on radiation medical care. Connected. The network NW may be a communication line dedicated to the system, but is preferably an existing line such as Ethernet (registered trademark) because the degree of freedom of the system configuration is low.

  FIG. 2 is a block diagram showing the main configuration of the FPD cassette 6 and the console 7.

  The FPD cassette 6 includes an imaging unit 6A, a control unit 60, an image storage unit 660, a transmission / reception unit 65, and the like. The imaging unit 6A has a function of acquiring a radiation image signal. The control unit 60 has a function of comprehensively controlling each unit of the FPD cassette 6, a ROM that stores a control program and data, a CPU that executes control of the control unit 60 according to the control program, and a CPU that is used as a work area And the like. The image storage unit 660 includes a RAM that stores an image signal captured by the imaging unit 6A. The transmission / reception unit 65 communicates with the console 77 and the like. The battery 66 as a power source supplies power to each part of the FPD cassette 6, and may be either a rechargeable type or a replaceable type. In addition to the battery, the power source may be a capacitor or the like.

  The console 7 includes a console control unit 70, a transmission / reception unit 75, a display unit 77, an input operation unit 78, and an image storage unit 760. The console control unit 70 has a function of comprehensively controlling each unit of the console 7, a ROM that stores a control program, data, and the like, a CPU that executes control of the console control unit 70 according to the control program, and a CPU serving as a work area It consists of RAM to be used.

  The display unit 77 is composed of, for example, a CRT (Cathode Ray Tube), an LCD (Liquid Crystal Display), or the like, and in accordance with an instruction of a display signal sent from the console control unit 70, an image signal captured by the FPD cassette 6 Various screens such as information, patient list, various messages and images are displayed.

  The input operation unit 78 includes, for example, a keyboard, a mouse, and the like, and outputs a key press signal pressed by the keyboard and an operation signal from the mouse to the console control unit 70 as input signals. The input operation unit 78 may be configured by a so-called touch panel. Then, information on photographing conditions is input by the input operation unit 78. The imaging condition information here refers to radiation dose, radiation detection sensitivity information, and the like. For example, the radiation dose irradiated from the radiation irradiation device 3 varies depending on the imaging region and the patient's condition. The radiation detection sensitivity information corresponds to the FPD cassette 6 used for imaging, and has different radiation detection sensitivities depending on the type of the light emitting layer 64 used in the FPD cassette 6 and the performance of the detection element 620.

  The image storage unit 760 is an image signal obtained by the imaging unit 6A, image data obtained based on the image signal, an image signal obtained by processing by the console 7, an image data obtained based on the image signal, or the like. It consists of RAM etc. which memorize The transmission / reception unit 75 performs communication with the FPD cassette 6 and the like.

  FIG. 3 is a perspective view showing the inside of the FPD cassette 6.

  As shown in the figure, the FPD cassette 6 has a casing 61 that protects the inside, and is configured to be transportable as a cassette, that is, portable. An imaging panel 62 that converts irradiated radiation into an electrical signal is formed in layers inside the casing 61. A light emitting layer 64 that emits light in accordance with the intensity of incident radiation is provided on the radiation irradiation side of the imaging panel 62. Further, the overall size of the imaging panel corresponds to a shooting size such as a large angle, half cut, or six cut.

  The light emitting layer 64 is generally called a scintillator layer. For example, a phosphor is a main component, and based on incident radiation, an electromagnetic wave having a wavelength of 300 nm to 800 nm, that is, an ultraviolet ray to an infrared ray centered on a visible ray. Outputs electromagnetic waves (light) over light.

  The imaging panel 62 is provided on the surface of the light emitting layer 64 opposite to the surface on which the radiation is irradiated, and electromagnetic waves (light) output from the light emitting layer 64 are converted into electric energy and accumulated. Detection elements that output image signals based on electrical energy are arranged in a matrix. The charges accumulated in the imaging panel 62 are read out by the scanning drive circuit 609 and the readout circuit 608, stored in the image storage unit 660 as image data or image data obtained based on the image signal, and controlled by the control unit 60. Is transmitted from the transmission / reception unit 65 to the console 7 via the access point 5. The battery 66 as a power source supplies power to each part of the FPD cassette 6, and may be either a rechargeable type or a replaceable type. In addition to the battery, the power source may be a capacitor or the like.

  4 and 5 are flowcharts showing an example of an operation outline of the radiographic imaging system according to the present exemplary embodiment. Hereinafter, an outline of the operation will be described according to the flow shown in FIGS.

  In the flowchart shown in FIG. 4, the FPD cassette 6 used for photographing is arranged in advance at the photographing position, the cassette ID is input from the console 7, the FPD cassette 6 to be used is specified, and the FPD cassette 6 is specified. It is assumed that the wireless communication means is in the sleep mode. This sleep mode is a state in which the wireless communication means is not activated for a predetermined set time (sleep state) and is activated. Further, the imaging panel 62 and the like are not activated.

  First, the console 7 searches for patient information (step S101), receives an examination information result from the RIS that manages the above-described radiological information, and selects an examination site (step S102). Next, an activation signal for activating the FPD cassette 6 wirelessly is transmitted from the console 7 side to the FPD cassette 6 (step S103). At this time, it is preferable that the console ID of the console 7 that is the transmission destination of the image data and the photographing order information are also transmitted. If there is only one console 7 and the transmission destination of the image data is specified without using the console ID, it is not necessary to transmit the console ID.

  When the FPD cassette 6 receives the activation signal from the console 7 (step S203), the FPD cassette 6 activates the FPD cassette 6 (step S204) and shifts to the photographing preparation state. That is, when an activation signal is received from the console 7, the wireless communication means of the FPD cassette 6 cancels the sleep mode and transitions to a mode that is always activated. Further, power is supplied to each part including the imaging panel 62 in the FPD cassette 6 to perform a starting operation.

  Next, an activation completion signal is transmitted from the FPD cassette 6 to notify the console 7 that activation of each unit has been completed wirelessly (step S205). When the console 7 receives the activation completion signal (step S105), the console 7 displays that the FPD cassette 6 is in a ready state (step S106).

  On the other hand, the radiation irradiating apparatus 3 waits for the first-stage SW1 of the two-stage switch to be in the imaging standby state to be turned on (step S301). When the stage SW1 is turned on (step S301; Yes), the console 7 is notified that the first stage SW1 of the switch is turned on (step S302).

  When the console 7 receives the ON information of the switch SW1 from the radiation irradiating device 3, the console 7 wirelessly transmits a request for imaging preparation to the FPD cassette 6 (step S107). When the FPD cassette 6 receives the imaging preparation request from the console 7 (step S207), the FPD cassette 6 resets the accumulated charge (step S208). The reset of accumulated charge is to sweep out and clear the charge already accumulated in the imaging panel in the FPD cassette 6 due to dark current noise or the like.

  After resetting the accumulated charge, the FPD cassette 6 transmits that the preparation for photographing is completed wirelessly (step S209). When the console 7 receives the imaging preparation completion of the FPD cassette 6 (step S109), the console 7 releases the interlock of the radiation irradiation device 3 (step S110). That is, the irradiation prohibition lock of the radiation irradiation apparatus 3 is released. At this time, imaging conditions such as the radiation dose irradiated by the radiation irradiation device 3 are transmitted.

  When the interlock is released, the radiation irradiation apparatus 3 waits for the second-stage SW2 of the two-stage switch connected to the radiation irradiation apparatus 3 to be turned on (step S303), and the second stage of the switch When the eye SW2 is turned on (step S303; Yes), the console 7 is notified that the second stage SW2 of the switch is turned on (step S303).

  Thereafter, radiation is exposed (step S310), and the imaging panel in the FPD cassette 6 converts the light output from the light emitting layer into electrical energy and accumulates it. That is, image information is accumulated in the imaging panel (step S210).

  The radiation irradiating apparatus 3 ends and stops the radiation exposure under a predetermined imaging condition, and transmits the fact that it has stopped to the console 7 (step S311).

  Thereafter, the flow shown in FIG.

  As shown in FIG. 5, when shooting is completed, an image reading request is transmitted wirelessly from the console 7 to the FPD cassette 6 (step S111), and when the FPD cassette 6 receives the request (step S211), the image reading Is performed (step S212). This image reading is to read out the electric charges accumulated in the individual pixels of the image pickup panel by the scanning drive circuit and the reading circuit and store them in the image storage unit. The read image signal is RAW as image data. It is preferable to generate and store image data and thinned image data. The image data is not limited to this, and may be compressed image data.

  When the image reading in the FPD cassette 6 is completed, the fact that the image reading has been completed wirelessly is transmitted from the FPD cassette 6 to the console 7 (step S213). When the completion of image reading is received on the console 7 side (step S113), a transmission request for an image photographed wirelessly is transmitted from the console 7 to the FPD cassette 6 (step S114). Upon receiving the image transmission request from the console 7 (step S214), the FPD cassette 6 transmits image data (RAW image data and thinned image data) (step S215), and the console 7 receives image data (step S215). S115) is performed.

  In addition, it is preferable to transmit the thinned image data first and then transmit the RAW image data for the transmission of the image from the FPD cassette 6 to the console 7.

  Next, a transmission request of dark image data is made wirelessly from the console 7 to the FPD cassette 6 (step S116), and when this is received by the FPD cassette 6 side (step S216), the FPD cassette 6 receives the dark image data. Obtain (step S217). Acquisition of dark image data means acquisition of noise level data for each pixel of the imaging panel, which is stored in individual pixels of the imaging panel by driving the imaging panel for a predetermined time without performing radiation exposure. The read charges are read out by a scanning drive circuit and a reading circuit and stored in an image storage unit.

  After obtaining the dark image data, the dark image data is wirelessly transmitted from the FPD cassette 6 to the console 7 (step S218) and received by the console 7 (step S117).

  On the console 7 side, the image is corrected based on the received image data and dark image data, and a preview image is displayed on the display unit (step S119). Thereafter, the operator performs image correction (step S120), image display after correction (step S121), and image processing (step S122), and determines whether re-photographing is necessary based on the obtained image (step S123). . If the obtained image is unsatisfactory and re-photographing is required (step S123; Yes), the re-photographing is performed, so the process returns to step S106 and the same operation as described above is performed.

  If the obtained image is acceptable (step S123; No), the obtained image data is stored (step S124). This storage is preferably stored in, for example, a server arranged on the network, but may be stored in a storage unit in the console 7.

  Next, it is determined whether or not images of other parts are scheduled to be taken and it is necessary to perform continuous photographing (step S125). If continuous photographing is necessary (step S125; Yes), the process returns to step S101, and The same operation is performed. When the continuous shooting is not necessary (step S125; No), the permission of transition to the sleep mode is transmitted from the console 7 to the FPD cassette 6 (step S126), and the FPD cassette 6 receives this transmission. (Step S226) Then, the state transition from the always activated mode to the sleep mode is performed (Step S227).

  The above is an example of an outline of the operation of the radiographic image capturing system according to the present embodiment.

  Note that the transmission of the image data from the FPD cassette 6 has been described in the example in which the RAW image data and the thinned image data are transmitted in one step. However, the present invention is not limited to this. For example, the thinned image data is transmitted first. Then, the operation may be such that the RAW image data and the dark image data are transmitted later while the image of the thinned image data is displayed on the display unit at an early stage.

  Further, the example in which the thinned image data and the RAW image data are transmitted has been described. However, the present invention is not limited to this. For example, the thinned image data and the interpolation data thinned by the thinned image data are transmitted and synthesized on the console 7 side. Something like that. Further, the detailed image data generated from the RAW image data and the thinned image data generated from the detailed image data may be compressed and transmitted.

  Hereinafter, wireless communication between the console 7 and the FPD cassette 6 serving as a radiographic image detector in the radiographic imaging system according to the present embodiment will be described.

  FIG. 6 is a diagram schematically illustrating a first example of wireless communication operation timing setting between the console 7 and the FPD cassette 6 of the radiographic imaging system according to the present embodiment.

  As shown in FIG. 6, from the console 7 side, for example, the same command (command A in the figure) is repeatedly transmitted at a transmission cycle N [ms]. On the other hand, on the FPD cassette 6 side, the sleep state and the activation state are repeated at a predetermined activation cycle L [ms]. In the figure, the activation time is X [ms], and the sleep time is (L−X) [ms].

  Since transmission is performed at the transmission cycle N from the console 7 side, the command A transmitted during the start-up time X when the FPD cassette 6 side is activated is transmitted from the FPD cassette 6 among the multiple transmissions of the same command A. Received on the side. A response A to the command A is transmitted from the FPD cassette 6 side.

  After receiving the response A on the console 7 side, in order to perform processing for the response A on the console 7 side, communication with another system in the hospital, processing of the operation of the engineer who is an operator, etc. After the communication with the time FPD cassette 6 is suspended, the next command (command B in the figure) is repeatedly transmitted in the transmission cycle N.

  Similarly, the command B transmitted during the activation time X when the FPD cassette 6 side is activated is received by the FPD cassette 6 side, and a response B to the command B is transmitted from the FPD cassette 6 side.

  In response to the response B on the console 7 side, processing for the response B on the console 7 side, communication with another in-hospital system, etc., and handling of the operation of the engineer who is an operator are performed in the same manner as described above. After the communication with the FPD cassette 6 side is suspended for an indefinite time, the next command is repeatedly transmitted in the transmission cycle N.

In this example, the FPD cassette 6 is configured to repeat sleep and activation, and from the console 7 side, any of the same commands to be transmitted a plurality of times is received on the FPD cassette 6 side.
N <L (1)
N <X (2)
Is set to satisfy.

  By setting the time so as to satisfy the above formulas (1) and (2), even if the FPD cassette 6 used for photographing is in the state of being placed at the photographing position, the battery built in the FPD cassette 6 Further power saving can be achieved. For example, by setting L = 100 ms, X = 25 ms, and N = 20 ms, the power consumption related to the wireless communication of the battery built in the FPD cassette 6 in the standby state is the state in which the FPD cassette 6 is disposed at the photographing position. Thus, the power consumption is 25% compared to the case where the wireless communication unit is always activated, and 75% power saving is possible.

  As described above, since there is an indefinite communication suspension time on the console 7 side, due to the time lag of the response on the FPD cassette 6 side with respect to the command transmission content on the console 7 side, the mismatch of the mutual timing, etc., the console 7 side When the response from the FPD cassette 6 cannot be received on the console 7 side with respect to the transmitted command, the same command transmitted from the console 7 side is transmitted again, and even if this retransmission is performed for a predetermined time, the FPD When there is no response from the cassette 6, it is considered that some abnormality has occurred in the communication function or the FPD cassette 6, and it is preferable to perform a display prompting replacement of the FPD cassette 6 on the display unit on the console 7 side.

  FIG. 7 is a diagram schematically illustrating a second example of wireless communication operation timing setting between the console 7 and the FPD cassette 6 of the radiographic imaging system according to the present embodiment.

  As shown in FIG. 7, on the FPD cassette 6 side, the sleep state and the activation state are repeated at a predetermined activation cycle L. In the figure, the activation time is X, and the sleep time is (L−X).

  In this example, transmission of M times (M is an integer of 2 or more) is set to one cycle in the transmission cycle N from the console 7 side. Further, in order to allow a response delay from the FPD cassette 6 side, an allowable delay time of time W from the start of transmission is set on the console 7 side, and a response from the FPD cassette 6 side within this time W can be received. It is set to be.

These time settings are based on the following condition X: time [ms] when the wireless communication means on the FPD cassette 6 side is activated
L: Activation cycle [ms] of the wireless communication means on the FPD cassette 6 side
N: Transmission cycle [ms] of the wireless communication means on the console 7 side
M: Number of transmissions of the wireless communication means on the console 7 side [times] (M is an integer of 2 or more)
W: Allowable delay time of response from FPD cassette 6 on the console 7 side [ms]
When
N <X (2)
L <N × M (3)
L ≦ W (4)
Is set to satisfy.

  In such a setting, the communication between the console 7 and the FPD cassette 6 is transmitted in the transmission cycle N from the console 7 side as in FIG. Among them, the command A transmitted during the activation time X when the FPD cassette 6 side is activated is received by the FPD cassette 6 side. A response A to the command A is transmitted from the FPD cassette 6 side.

  After receiving the response A on the console 7 side, in order to perform processing for the response A on the console 7 side, communication with another system in the hospital, processing of the operation of the engineer who is an operator, etc. After the communication with the time FPD cassette 6 is suspended, the next command (command B in the figure) is repeatedly transmitted under the same conditions in the transmission cycle N.

  Similarly, the command B transmitted during the activation time X when the FPD cassette 6 side is activated is received by the FPD cassette 6 side, and a response B to the command B is transmitted from the FPD cassette 6 side.

  In response to the response B on the console 7 side, processing for the response B on the console 7 side, communication with another in-hospital system, etc., and handling of the operation of the engineer who is an operator are performed in the same manner as described above. After the communication with the FPD cassette 6 side is suspended for an indefinite time, the next command is repeatedly transmitted in the transmission cycle N.

  For example, by setting the values of the above formulas (2) to (4) to W = 100 ms, M = 5 times, L = 95 ms, X = 25 ms, and N = 20 ms, the FPD cassette 6 in the standby state is built in. The power consumption related to the wireless communication of the battery is 26% of the power consumption when the FPD cassette 6 is placed at the shooting position and the wireless communication unit is always activated, and 74% of the power can be saved. Thus, even when the FPD cassette 6 used for photographing is in a state of being placed at the photographing position, it is possible to further reduce the power consumption of the battery that is a power source built in the FPD cassette 6.

  In addition, by setting the allowable delay time W of the response from the FPD cassette 6 side on the console 7 side to be equal to or longer than the activation cycle L on the FPD cassette 6 side, communication with the FPD cassette 6 side is indefinite Even when the time is interrupted or the communication after the interruption, it is possible to reliably receive the response from the FPD cassette 6 side on the console 7 side, and it is possible to further improve the reliability of communication. In addition, even if there is an interruption such as another in-hospital system or operator's operation, ensuring the allowable delay time W makes it possible to receive the response from the FPD cassette 6 side more reliably, and more communication It becomes possible to improve the reliability.

  The communication time setting described in FIG. 6 or FIG. 7 is performed until the command communication in step S103 on the console 7 side and step S203 on the FPD cassette 6 side in the flowchart shown in FIG. 4 and FIG. Although described in the example of application, it is not limited to this. For example, it may be applied to all command communications other than the transmission of image data and dark image data from the FPD cassette 6 side in steps S215 and S218.

DESCRIPTION OF SYMBOLS 1 Radiographic imaging system 3 Radiation irradiation apparatus 5 Access point 6 FPD cassette (radiation image detector)
6A Imaging unit 7 Console 60 Control unit 61 Case 62 Imaging panel 64 Light emitting layer 65 Transmission / reception unit 66 Battery 70 Console control unit 75 Transmission / reception unit 77 Display unit 78 Input operation unit 100 Shooting room

Claims (4)

A radiation image detector for generating image data by detecting radiation generated by the radiation generator and transmitted through the subject;
In a radiographic imaging system having a console that communicates with the radiological image detector,
The radiation image detector has a wireless communication means and a battery,
The activation cycle of the radio communication means of the radiation image detector is L [ms],
The time during which the wireless communication means of the radiation image detector is activated is expressed as X [ms],
When the transmission cycle of the console wireless communication means is N [ms],
N <L
N <X
Radiation imaging system characterized by being set to satisfy A radiation image detector for generating image data by detecting radiation generated by the radiation generator and transmitted through the subject;
In a radiographic imaging system having a console that communicates with the radiological image detector,
The radiation image detector has a wireless communication means and a battery,
The time during which the wireless communication means of the radiation image detector is activated is expressed as X [ms],
The activation cycle of the radio communication means of the radiation image detector is L [ms],
The transmission cycle of the console wireless communication means is N [ms],
The number of transmissions of the wireless communication means of the console is M [times] (where M is an integer of 2 or more),
When the allowable delay time of the response from the radiation image detector of the console is W [ms],
N <X
L <N × M
L ≦ W
Radiation imaging system characterized by being set to satisfy   The radiographic image capturing system according to claim 1, wherein the setting is used for at least command communication between the radiographic image detector and the console.   The radiographic imaging system according to any one of claims 1 to 3, wherein a communication system of the wireless communication unit is a ZigBee system or a Bluetooth system.

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