JP2009028374A - Radiation image photographing system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To efficiently perform a photographing work by surely and easily arranging a cassette so that the photographing surface of a radiation conversion panel is turned to a radiation source side. <P>SOLUTION: In the casing 42 of a radiation detection cassette 24, a reflection part 60 is provided on the side of an irradiation surface 40 to be irradiated with radiation X and a rugged scattering part 64 having a plurality of swollen surfaces 62 is provided on a side face to be the opposite side of the irradiation surface 40. Then, emitted light is irradiated from an upper part facing a patient 14 to a radiation detection cassette 24, and when the emitted light is not received in a light receiving part 38, it is confirmed that the irradiation surface 40 of the radiation detection cassette 24 is not installed on the side of the photographing device 22 and an alarm is issued to a display device 26 or the like. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a radiographic imaging system including a cassette in which a radiation conversion panel that converts radiation transmitted through a subject into radiographic image information is accommodated.

  2. Description of the Related Art In the medical field, a radiation image capturing apparatus that irradiates a subject with radiation and guides the radiation transmitted through the subject to a radiation conversion panel to capture a radiation image is widely used. In this case, the radiation conversion panel is a conventional radiation film in which a radiation image is exposed and recorded, or radiation energy as a radiation image is accumulated in a phosphor and irradiated with excitation light, and the radiation image is then emitted as a stimulating light. A storage phosphor panel that can be taken out as is known. These radiation conversion panels supply a radiation film on which a radiographic image is recorded to a developing device to perform development processing, or supply a stimulable phosphor panel to a reading device to perform reading processing so that a visible image can be obtained. A radiographic image is obtained.

  On the other hand, in an operating room or the like, it is necessary to be able to immediately read out and display a radiation image from a radiation conversion panel after imaging in order to perform a quick and accurate treatment on a patient. Radiation detection using a solid-state detector that converts radiation directly into electrical signals, or converts radiation into visible light with a scintillator and then converts it into electrical signals to read out as a radiation conversion panel that can meet such demands A vessel has been developed.

  Such a radiation conversion panel is accommodated in a cassette together with wireless communication means and a battery, and irradiates X-rays from a radiation source facing the imaging surface of the radiation conversion panel (see, for example, Patent Document 1).

JP 2003-172783 A

  By the way, in the prior art which concerns on patent document 1, it is necessary to arrange | position so that the imaging surface of a radiation conversion panel may face a radiation source and a patient side. However, since such a cassette is generally formed in a thin box shape, it is difficult to determine the front and back of the cassette, and there is a concern that the imaging surface may be misplaced so as to be opposite to the radiation source. . When a radiographic image is taken in this state, the radiographic image is not taken on the radiation conversion panel, and it is necessary to set the cassette again in a predetermined direction and perform the photographing work, which is complicated. In addition, there is a problem that work efficiency is reduced.

  The present invention has been made in consideration of the above-described problems, and is a radiographic imaging system capable of efficiently performing imaging operations by reliably and easily arranging the imaging surface of the radiation conversion panel on the radiation source side. The purpose is to provide.

In order to achieve the above object, the present invention includes an imaging unit having a radiation source capable of emitting radiation,
A cassette having a radiation conversion panel that is provided at a position facing the imaging unit with a subject in between, detects radiation irradiated from the radiation source and transmitted through the subject, and converts the radiation into radiation image information;
Detecting means for detecting whether or not an imaging surface of the radiation conversion panel is disposed on the radiation source side;
With
The detection means is provided in the imaging unit, faces the cassette, emits emitted light to the cassette, and can detect the reflected emitted light; and
In the cassette, provided on the side surface excluding the imaging surface, a scattering portion capable of scattering the emitted light,
It is characterized by comprising.

  According to the present invention, the cassette is installed so as to face the radiation source with the subject in between, and the imaging surface of the radiation conversion panel provided on the cassette is disposed on the radiation source side via the detection means Detect whether or not. In this case, when the cassette is irradiated with emission light from the detection unit of the detection means provided in the imaging unit, a scattering unit capable of scattering the emission light is provided on the side surface of the cassette excluding the imaging surface. Whether or not the photographing surface is installed on the photographing device side can be detected in advance according to the light reception state of the emitted light. Accordingly, the cassette can be reliably and easily re-installed so that the imaging surface is on the imaging device side when the imaging surface is installed on the side opposite to the imaging device, and an error in the imaging disabled state is possible. Since shooting is prevented, work efficiency can be improved.

  1-3 is explanatory drawing of the operating room 12 in which the radiographic imaging system 10 which concerns on this Embodiment was installed. In the operating room 12, in addition to the radiographic imaging system 10, an operating table 16 on which a patient 14 (subject) lies is disposed, and an instrument table 20 on which various instruments used by a doctor 18 for surgery are placed. Located on the side of the operating table 16. The operating table 16 is provided with various devices necessary for surgery, such as an anesthesia machine, aspirator, electrocardiograph, and blood pressure monitor.

  The radiographic imaging system 10 includes an imaging device 22 that irradiates a patient 14 with radiation X having a dose according to imaging conditions, and a radiation detector (radiation conversion panel) 50 (described later) that detects the radiation X transmitted through the patient 14. ) Built-in radiation detection cassette (cassette) 24, a display device 26 for displaying a radiation image based on the radiation X detected by the radiation detector 50, and the imaging device 22, the radiation detection cassette 24 and the display device 26 are controlled. And a detection unit 30 that detects the installation direction of the radiation detection cassette 24 with respect to the imaging device 22. Signals are transmitted and received by wireless communication among the imaging device 22, the radiation detection cassette 24, the display device 26, and the console 28.

  The imaging device 22 is movably provided by a plurality of free arms 32, can be moved to a desired position according to the imaging region of the patient 14, and can be retracted to a position that does not obstruct the operation by the doctor 18. Similarly, the display device 26 is connected to the universal arm 34 and can be moved to a position where the doctor 18 can easily confirm the captured radiographic image.

  A detection unit 30 is provided on the side of the imaging device 22 so as to face the radiation detection cassette 24 installed on the operating table 16. The detection unit 30 includes, for example, a reflection type photosensor having a light emitting unit 36 that emits emitted light and a light receiving unit 38 that receives the emitted light, and the light emitting unit 36 and the light receiving unit 38 include the radiation detection cassette 24. (See FIG. 2). Then, emitted light is irradiated from the light emitting unit 36 toward the radiation detection cassette 24 so as to be substantially orthogonal, and the emitted light is reflected by the irradiation surface 40 and received by the light receiving unit 38. The detection result by the detection unit 30 is output to the transmitter / receiver 92 constituting the photographing apparatus 22, and then transmitted to the console 28. Note that the detection unit 30 may be provided inside the photographing apparatus 22.

  4-6 is a figure which shows the external appearance and internal structure of the radiation detection cassette 24. As shown in FIG. The radiation detection cassette 24 includes a casing (housing) 42 made of a material that transmits the radiation X. The casing 42 has a substantially rectangular shape and a set of flat plate portions 44a and 44b spaced apart from each other by a predetermined distance, and the flat plate portions 44a and 44b are connected to each other, and four wall portions 46a to 46d that are substantially orthogonal so as to surround the four sides. It consists of. The casing 42 is arranged so that one flat plate portion 44a faces the imaging device 22 (in the direction of arrow A in FIG. 2) and the other flat plate portion 44b faces the operating table 16 (in FIG. 2, arrow B). direction).

  Inside the radiation detection cassette 24, a grid 48 for removing scattered radiation of the radiation X by the patient 14 from the irradiation surface 40 side of the casing 42 to which the radiation X is irradiated, and radiation for detecting the radiation X transmitted through the patient 14. A detector 50 and a lead plate 52 that absorbs the backscattered rays of the radiation X are sequentially arranged. In addition, you may comprise the irradiation surface 40 of the casing 42 as a grid.

  The casing 42 includes a battery 54 that is a power source of the radiation detection cassette 24, a cassette control unit 56 that drives and controls the radiation detector 50 with electric power supplied from the battery 54, and the radiation detector 50. A transmitter / receiver 58 that transmits and receives a signal including information of the detected radiation X to and from the console 28 is accommodated.

  In the flat plate portion 44a provided with the irradiation surface 40, a reflection portion 60 is provided with a predetermined width in the vicinity of the end portion on the side of each wall portion 46a to 46d. The reflector 60 is made of, for example, a reflective material that can be retroreflected, is formed in a sheet shape, and is attached to the flat plate portion 44a, and the light emitted from the light emitting unit 36 that constitutes the detecting unit 30. It is provided so that light can be reflected toward the light emitting unit 36 side (arrow A direction). That is, the reflecting portion 60 is formed in a hollow shape so as to surround the end portion of the flat plate portion 44a (see FIG. 3).

  On the other hand, as shown in FIGS. 5 and 6, the flat portion 44 b of the casing 42 on the side opposite to the irradiation surface 40 described above has a scattering portion 64 formed in an uneven shape having a plurality of bulging surfaces 62. When the flat plate part 44b provided with the scattering part 64 is arranged so as to be on the imaging device 22 and the detection part 30 side (arrow A direction), it is formed so as to be able to scatter the emitted light from the detection part 30. Yes.

  The scattering portion 64 is provided along the surface of the flat plate portion 44b, and the bulging surface 62 is formed to bulge in a substantially arcuate cross section in a direction away from the casing 42 (arrow B direction).

  That is, the casing 42 is provided with a reflecting portion 60 on the flat plate portion 44a facing the patient 14 and the imaging apparatus 22 and irradiated with the radiation X, and a scattering portion on the flat plate portion 44b facing the operating table 16 on which the patient 14 lies. 64 is provided. In other words, the reflection part 60 is provided in the flat plate part 44a close to the radiation detector 50 irradiated with the radiation X, and the flat plate part 44b on the lead plate 52 side (in the arrow B direction) capable of absorbing the back scattered radiation of the radiation. Is provided with a scattering portion 64.

  The cassette control unit 56 and the transmitter / receiver 58 are preferably provided with a lead plate or the like on the irradiation surface 40 side of the casing 42 in order to avoid damage due to irradiation with the radiation X.

  FIG. 7 is a block diagram of the circuit configuration of the radiation detector 50. The radiation detector 50 has a photoelectric conversion layer 67 made of a material such as amorphous selenium (a-Se) that senses the radiation X and generates charges on an array of thin film transistors (TFTs) 68. After the generated charge is stored in the storage capacitor 69, the TFT 68 is sequentially turned on for each row, and the charge is read as an image signal. In FIG. 7, only the connection relationship between one pixel 66 including the photoelectric conversion layer 67 and the storage capacitor 69 and one TFT 68 is shown, and the configuration of the other pixels 66 is omitted. Amorphous selenium must be used within a predetermined temperature range because its structure changes and its function decreases at high temperatures. Therefore, it is preferable to provide means for cooling the radiation detector 50 in the radiation detection cassette 24.

  To the TFT 68 connected to each pixel 66, a gate line 70 extending in parallel with the row direction and a signal line 72 extending in parallel with the column direction are connected. Each gate line 70 is connected to a line scanning drive unit 74, and each signal line 72 is connected to a multiplexer 82 constituting a reading circuit.

  Control signals Von and Voff for controlling on / off of the TFTs 68 arranged in the row direction are supplied from the line scanning drive unit 74 to the gate line 70. In this case, the line scan driving unit 74 includes a plurality of switches SW1 for switching the gate lines 70 and an address decoder 76 for outputting a selection signal for selecting one of the switches SW1. An address signal is supplied from the cassette control unit 56 to the address decoder 76.

  Further, the charge held in the storage capacitor 69 of each pixel 66 flows out to the signal line 72 through the TFTs 68 arranged in the column direction. This charge is amplified by an amplifier 78. A multiplexer 82 is connected to the amplifier 78 via a sample and hold circuit 80. The multiplexer 82 includes a plurality of switches SW2 for switching the signal line 72 and an address decoder 84 for outputting a selection signal for selecting one of the switches SW2. An address signal is supplied from the cassette control unit 56 to the address decoder 84. An A / D converter 86 is connected to the multiplexer 82, and radiation image information converted into a digital signal by the A / D converter 86 is supplied to the cassette control unit 56.

  FIG. 8 is a configuration block diagram of the radiographic image capturing system 10 including the imaging device 22, the radiation detection cassette 24, the display device 26, and the console 28.

  The imaging device 22 receives imaging conditions from the imaging switch 88, the radiation source 90 that outputs the radiation X, and the console 28 by wireless communication, while the detection result by the detection unit 30, the imaging completion signal, and the like are transmitted by wireless communication to the console 28. And a radiation source control unit 94 that controls the radiation source 90 based on the imaging start signal supplied from the imaging switch 88 and the imaging conditions supplied from the transceiver 92.

  The radiation detection cassette 24 accommodates a radiation detector 50, a battery 54, a cassette control unit 56, and a transceiver 58.

  The cassette control unit 56 is detected by the radiation detector 50 and an address signal generation unit 96 that supplies an address signal to the address decoder 76 of the line scan driving unit 74 and the address decoder 84 of the multiplexer 82 that constitute the radiation detector 50. An image memory 98 for storing the radiation image information and a cassette ID memory 100 for storing cassette ID information for specifying the radiation detection cassette 24.

  The transceiver 58 receives a transmission request signal from the console 28 by wireless communication, and wirelessly transmits the cassette ID information stored in the cassette ID memory 100 and the radiation image information stored in the image memory 98 to the console 28. Send by communication.

  The display device 26 displays a receiver 102 that receives radiation image information from the console 28, a display control unit 104 that performs display control of the received radiation image information, and the radiation image information processed by the display control unit 104. And a display unit 106.

  The console 28 is necessary for imaging by the imaging device 22, the transceiver 108 that transmits and receives necessary information including radiographic image information, position information, and the like to the imaging device 22, the radiation detection cassette 24, and the display device 26 by wireless communication. An imaging condition management unit 110 that manages various imaging conditions, an image processing unit 112 that performs image processing on radiation image information transmitted from the radiation detection cassette 24, an image memory 114 that stores processed radiation image information, and an imaging target The patient information management unit 116 that manages patient information of the patient 14, the cassette information management unit 118 that manages the cassette information transmitted from the radiation detection cassette 24, and the radiation detection cassette based on the detection result by the detection unit 30. And a state determination unit 120 that determines 24 installation states. The console 28 may be installed outside the operating room 12 as long as it can transmit and receive signals to and from the imaging device 22, the radiation detection cassette 24, and the display device 26 by wireless communication.

  The radiographic image capturing system 10 of the present embodiment is basically configured as described above, and the operation thereof will be described next.

  The radiographic image capturing system 10 is installed in the operating room 12 and is used, for example, when a radiographic image needs to be captured during surgery of the patient 14 by the doctor 18. Therefore, the patient information of the patient 14 to be imaged is registered in advance in the patient information management unit 116 of the console 28 prior to imaging. In addition, when the imaging region and the imaging method are determined in advance, these imaging conditions are registered in the imaging condition management unit 110 in advance. In the state where the above preparatory work is completed, the operation for the patient 14 is performed.

  When taking a radiographic image during the operation, the doctor 18 or a radiographer in charge takes the irradiation surface 40 at a predetermined position between the patient 14 and the operating table 16 (in FIGS. 2 and 9A, The radiation detection cassette 24 is installed in the state indicated by arrow A).

  At this time, as shown in FIG. 2 and FIG. 9A, emitted light is emitted from the light emitting unit 36 constituting the detecting unit 30 toward the radiation detection cassette 24 side (in the direction of arrow B), and the straight emitted light is converted into the casing. The reflected light is reflected by the reflecting portion 60 provided in 42, and the emitted light travels straight toward the detecting portion 30 side (in the direction of arrow A) and is received by the light receiving portion 38. Specifically, as shown in FIG. 3, the emitted light is reflected through a part of the reflection part 60 that is not covered by the patient 14 and travels straight toward the light receiving part 38 (in the direction of arrow A). That is, the reflection part 60 is provided in the vicinity of the flat plate part 44a in the casing 42 so as to avoid the patient 14 lying on the irradiation surface 40 side of the casing 42.

  A detection signal is output to the transmitter / receiver 92 in the photographing apparatus 22 based on the detection result of the detection unit 30, and then output to the state determination unit 120 through the transmitter / receiver 108 of the console 28.

  In this state determination unit 120, it is confirmed that the light emitted from the light emitting unit 36 is received by the light receiving unit 38 based on the detection signal, and the flat plate portion 44 a of the casing 42 including the reflecting unit 60 is detected by the detection unit 30. It is determined that they are facing each other. That is, it is confirmed that the irradiation surface 40 of the radiation detection cassette 24 is installed in a predetermined direction so as to be on the imaging device 22 side (arrow A direction).

  Thus, after confirming that the radiation detection cassette 24 is correctly installed between the patient 14 and the operating table 16, the imaging device 22 is moved to a position facing the radiation detection cassette 24, and an imaging switch is set. Operate 88 to take a picture.

  On the other hand, as shown in FIG. 9B, when the radiation detection cassette 24 is mistakenly installed so that the flat plate portion 44b having the scattering portion 64 is on the patient 14 and the imaging device 22 side (arrow A direction), The emitted light emitted from the light emitting unit 36 travels straight toward the radiation detection cassette 24 (in the direction of arrow B) and enters the scattering unit 64, so that the bulging surface 62 of the scattering unit 64 causes various directions. Since the light is reflected so as to diffuse, the reflected emitted light is not received by the light receiving unit 38. Since the light emitted from the light emitting unit 36 is not received by the light receiving unit 38 based on the detection signal from the detecting unit 30, the flat plate portion 44 b of the casing 42 including the scattering unit 64 faces the detecting unit 30. It is determined that

  That is, the irradiation surface 40 of the radiation detection cassette 24 is not installed so as to be on the imaging device 22 side (arrow A direction), and the side surface opposite to the irradiation surface 40 is the imaging device 22 side. It is confirmed that it is installed in the wrong direction.

  In this case, the radiation X from the imaging device 22 is not applied to the affected area of the patient 14 and the radiation detector 50 of the radiation detection cassette 24, and a desired radiographic image may not be captured. If there is, an output signal is output from the state determination unit 120 to the display device 26 via the transceiver 108. Along with this, the console 28, the display device 26, and the like are displayed as a warning that the radiation detection cassette 24 is not disposed at a predetermined position. In addition, when the radiation detection cassette 24 is installed in the wrong direction, not only a warning is displayed, but also control is performed from the console 28 to the radiation source control unit 94 of the imaging apparatus 22 based on an output signal from the state determination unit 120. A signal may be output to prohibit the photographing operation by the photographing device 22. Further, a display unit (not shown) may be provided on the side surface of the radiation detection cassette 24, and these displays may be displayed on the display unit.

  Further, when the radiation detection cassette 24 is installed in the correct orientation so that the irradiation surface 40 is on the imaging device 22 side (arrow A direction), for example, a display indicating that imaging is permitted is displayed on the display device 26. Also good.

  Thus, after confirming the warning displayed on the console 28, the display device 26, etc., the radiation detection cassette 24 is once taken out from a predetermined position between the patient 14 and the operating table 16, and the irradiation surface provided with the reflection unit 60. The orientation is changed so that 40 is on the imaging device 22 side (arrow A direction), and it is installed again at the predetermined position.

  As described above, after confirming that the radiation detection cassette 24 is in the predetermined position and the irradiation surface 40 is installed on the imaging device 22 side, the imaging switch 88 is operated to perform imaging. As a result, the radiation source control unit 94 of the imaging apparatus 22 acquires and acquires the imaging conditions related to the imaging region of the patient 14 by wireless communication from the imaging condition management unit 110 of the console 28 via the transceivers 92 and 108. By controlling the radiation source 90 according to the imaging conditions, the patient 14 is irradiated with the radiation X having a predetermined dose.

  The radiation X transmitted through the patient 14 is radiated to the radiation detector 50 after the scattered radiation is removed by the grid 48 of the radiation detection cassette 24, and is electrically applied by the photoelectric conversion layer 67 of each pixel 66 constituting the radiation detector 50. It is converted into a signal and held as a charge in the storage capacitor 69 (see FIG. 7). Next, the charge information, which is the radiation image information of the patient 14 held in each storage capacitor 69, is in accordance with the address signal supplied from the address signal generator 96 constituting the cassette controller 56 to the line scan driver 74 and the multiplexer 82. Read out.

  That is, the address decoder 76 of the line scan driver 74 outputs a selection signal according to the address signal supplied from the address signal generator 96 to select one of the switches SW1, and the TFT 68 connected to the corresponding gate line 70. A control signal Von is supplied to the gates of the two. On the other hand, the address decoder 84 of the multiplexer 82 outputs a selection signal in accordance with the address signal supplied from the address signal generation unit 96, sequentially switches the switch SW2, and is connected to the gate line 70 selected by the line scanning drive unit 74. Radiation image information which is charge information held in the storage capacitor 69 of each pixel 66 is read out via the signal line 72.

  The radiation image information read from the storage capacitor 69 of each pixel 66 connected to the selected gate line 70 of each radiation detector 50 is amplified by each amplifier 78 and then sampled by the sample and hold circuit 80. The signal is supplied to the A / D converter 86 via the multiplexer 82 and converted into a digital signal. The radiographic image information converted into the digital signal is temporarily stored in the image memory 98 of the cassette control unit 56 and then transmitted to the console 28 by wireless communication via the transceiver 58.

  Similarly, the address decoder 76 of the line scan driving unit 74 sequentially switches the switch SW 1 according to the address signal supplied from the address signal generating unit 96, and the storage capacitor 69 of each pixel 66 connected to each gate line 70. The stored radiation image information, which is charge information, is read through the signal line 72 and stored in the image memory 98 of the cassette control unit 56 through the multiplexer 82 and the A / D converter 86.

  The radiographic image information transmitted to the console 28 is received by the transmitter / receiver 108, subjected to predetermined image processing in the image processing unit 112, and then associated with the patient information of the patient 14 registered in the patient information management unit 116. Stored in the image memory 114.

  The radiographic image information subjected to the image processing is transmitted from the transceiver 108 to the display device 26. The display device 26 that has received the radiation image information by the receiver 102 controls the display unit 106 by the display control unit 104 to display the radiation image. The doctor 18 performs the operation while confirming the radiographic image displayed on the display unit 106.

  In this case, cables for transmitting and receiving signals are not connected between the radiation detection cassette 24 and the console 28, between the imaging device 22 and the console 28, and between the console 28 and the display device 26. Therefore, for example, these cables are not provided on the floor surface of the operating room 12, and there is no possibility of hindering the work of the doctor 18 or the like.

  In addition, in this Embodiment mentioned above, although the case where the detection part 30 was provided above the patient 14 and the radiation detection cassette 24 similarly to the imaging device 22 was demonstrated, it is not limited to this, For example, It is good also as a structure which can provide a detection part in the lower part of the operating table 16, irradiate emitted light with respect to the said radiation detection cassette 24 from the downward direction, and can confirm the installation state of this radiation detection cassette 24 according to the reflective state.

  Further, the casing 42 constituting the radiation detection cassette 24 is provided with a reflection portion 60 on a flat plate portion 44 a having the irradiation surface 40 so that the emitted light from the detection portion 30 can be reflected and is opposite to the irradiation surface 40. The scattering portion 64 capable of scattering the emitted light is provided on the flat plate portion 44b. However, the present invention is not limited to this. For example, the scattering portion 64 may be provided on the flat plate portion 44 a having the irradiation surface 40, and the reflection portion 60 may be provided on the flat plate portion 44 b on the opposite side of the irradiation surface 40. In this case, when emitted light is received by the light receiving unit 38 of the detection unit 30, the irradiation surface 40 of the radiation detection cassette 24 is installed in a wrong direction that is not disposed on the imaging device 22 side. Is confirmed.

  As described above, in the present embodiment, the radiation detection cassette 24 is installed between the patient 14 and the operating table 16, and the detection unit 30 provided on the upper side together with the imaging device 22 is used for the radiation detection cassette 24. The emitted light is irradiated. Then, it is possible to detect whether or not the irradiation surface 40 of the radiation detection cassette 24 is arranged on the imaging device 22 side (arrow A direction) based on the light reception state of the emitted light reflected by the radiation detection cassette 24.

  That is, since the radiation detection cassette 24 is provided with the scattering portion 64 capable of scattering the emitted light on the flat plate portion 44b opposite to the irradiation surface 40, the emitted light is not received by the detection portion 30. In this case, it is confirmed that the irradiation surface 40 is not installed on the imaging device 22 side (in the direction of arrow A). As a result, the radiation detection cassette 24 can be reliably and easily re-installed so that the irradiation surface 40 is on the imaging device 22 side based on the detection result, whereby a desired imaging operation can be performed and radiation can be performed. In the detection cassette 24, it is possible to prevent erroneous photographing on the side opposite to the irradiation surface 40, and thus it is possible to improve work efficiency.

  In the present embodiment described above, the radiation image capturing system 10 in which the patient 14 is placed on the operating table 16 and the radiation detection cassette 24 is installed between the patient 14 and the operating table 16 to perform imaging. Although described above, the present invention is not limited to this. For example, the radiation detection cassette 24 is used in a radiographic imaging system in which the patient 14 stands while facing the imaging apparatus and imaging is performed with the radiation X irradiated in the horizontal direction. May be used.

  In addition, this invention is not limited to embodiment mentioned above, Of course, it can change freely in the range which does not deviate from the main point of this invention.

It is explanatory drawing of the operating room where the radiographic imaging system which concerns on this Embodiment was installed. It is an enlarged side view which shows the patient and radiation detection cassette vicinity in the operating room of FIG. FIG. 2 is an enlarged plan view showing the vicinity of a patient and a radiation detection cassette in the operating room of FIG. 1. It is the partial notch external appearance perspective view which looked at the radiation detection cassette from the irradiation surface side irradiated with a radiation. It is the external appearance perspective view which looked at the radiation detection cassette of FIG. 4 from the opposite side to the irradiation surface. It is a side view of a radiation detection cassette. It is a circuit block diagram of a radiation detector. 1 is a configuration block diagram of a radiographic image capturing system. FIG. 9A shows a state in which a flat plate portion, which is an irradiation surface, faces the imaging device and the detection unit in the radiation detection cassette, and FIG. 9B shows a flat plate portion opposite to the irradiation surface in the imaging device and the detection unit. It is explanatory drawing which shows the state which confronted.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Radiographic imaging system 12 ... Operating room 14 ... Patient 16 ... Operating table 22 ... Imaging device 24 ... Radiation detection cassette 26 ... Display device 28 ... Console 30 ... Detection part 36 ... Light emission part 38 ... Light reception part 40 ... Irradiation surface 42 ... Casing 44a, 44b ... Flat plate part 50 ... Radiation detector 56 ... Cassette control part 58, 92, 108 ... Transceiver 60 ... Reflection part 62 ... Swelling surface 64 ... Scattering part 90 ... Radiation source 106 ... Display part 120 ... State determination Part

Claims (3)

An imaging unit having a radiation source capable of emitting radiation;
A cassette having a radiation conversion panel that is provided at a position facing the imaging unit with a subject in between, detects radiation irradiated from the radiation source and transmitted through the subject, and converts the radiation into radiation image information;
Detecting means for detecting whether or not an imaging surface of the radiation conversion panel is disposed on the radiation source side;
With
The detection means is provided in the imaging unit, faces the cassette, emits emitted light to the cassette, and can detect the reflected emitted light; and
In the cassette, provided on the side surface excluding the imaging surface, a scattering portion capable of scattering the emitted light,
A radiographic imaging system comprising: The system of claim 1, wherein
The radiographic image capturing system according to claim 1, wherein the cassette is provided with a reflecting portion capable of reflecting the emitted light on the imaging surface. The system according to claim 1 or 2,
The radiographic imaging system, wherein the detection unit includes a light emitting unit that emits the emitted light and a light receiving unit that receives the emitted light.

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