JP2009028332A - Cassette and radiation image photographing system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To surely arrange the photographing surface of a radiation conversion panel so as to be a radiation source side, and to efficiently perform a photographing work. <P>SOLUTION: In the casing 36 of a radiation detection cassette 24, a first plate part 38 facing a patient 14 and a second plate part 40 facing an operating table 16 are respectively provided with first and second detection parts 60 and 62 constituting a temperature detection part 58. Then, when the radiation detection cassette 24 is installed between the patient 14 and the operating table 16, one of the first plate part 38 and the second plate part 40 is heated by the body temperature of the patient 14, and by respectively detecting and comparing the temperature, whether or not the irradiation surface 44 of the radiation detection cassette 24 is installed on the side of a photographing device 22 is confirmed. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a cassette including a radiation conversion panel that detects radiation that has passed through a subject and converts the radiation into radiation image information, and a radiation image capturing system that includes the cassette.

  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, and there is a concern that the imaging surface may be mistakenly installed so that the imaging surface is opposite to the radiation source. . When a radiographic image is taken in this state, no radiographic image is taken on the radiation conversion panel, and it is necessary to install the cassette again in a predetermined direction and perform the imaging 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 cassette and a radiation that can be efficiently arranged so that the imaging surface of the radiation conversion panel is positioned on the radiation source side and the imaging operation can be performed efficiently. An object is to provide an image photographing system.

In order to achieve the above-mentioned object, the present invention detects a radiation irradiated from a radiation source and transmitted through a subject, and a housing that accommodates a radiation conversion panel that can be converted into radiation image information;
The housing is provided on at least one of the first surface facing the radiation source and the subject and the second surface opposite to the first surface across the radiation conversion panel. Temperature detecting means capable of detecting the surface temperature of
It is characterized by providing.

The present invention also includes an imaging unit having a radiation source capable of emitting radiation,
A cassette having a radiation conversion panel that is installed at a position facing the imaging unit with a subject interposed therebetween, detects radiation irradiated from the radiation source and transmitted through the subject, and converts the radiation into radiation image information;
The cassette is provided on at least one of the first surface facing the imaging unit and the subject and the second surface opposite to the first surface across the radiation conversion panel. Temperature detecting means capable of detecting the surface temperature;
Determination means for determining whether or not the imaging surface of the radiation conversion panel is arranged on the imaging unit side based on a detection result by the temperature detection means;
It is characterized by providing.

  According to the present invention, the casing constituting the cassette has a first surface facing the radiation source and the subject and a second surface opposite to the first surface across the radiation conversion panel, the first surface By detecting the surface temperature of at least one of the first surface and the second surface by the temperature detecting means, the surface temperature of the surface facing the subject increases due to the body temperature of the subject. It can be detected in advance which one of the first and second surfaces is arranged on the radiation source side. Therefore, the radiation conversion panel can be securely arranged so that the imaging surface is on the radiation source side, the imaging operation can be efficiently performed while preventing erroneous imaging, and an appropriate radiation image can always be obtained. Become.

  FIG. 1 is an explanatory diagram of an operating room 12 in which a radiographic imaging system 10 using a cassette according to the present embodiment is installed. In the operating room 12, in addition to the radiographic imaging system 10, an operating table 16 on which a patient (subject) 14 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 (imaging unit) 22 that irradiates a patient 14 with radiation X having a dose according to imaging conditions, and a radiation detector (radiation conversion panel) that detects the radiation X transmitted through the patient 14. 48 (to be described later) a radiation detection cassette (cassette) 24, a display device 26 for displaying a radiation image based on the radiation X detected by the radiation detector 48, the imaging device 22, the radiation detection cassette 24, and a display And a console 28 for controlling the device 26. 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.

  2-4 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) 36 made of a material that transmits the radiation X. The casing 36 has a substantially rectangular shape and a pair of first and second flat plate portions 38 and 40 spaced apart from each other by a predetermined distance, and connects the first flat plate portion 38 and the second flat plate portion 40 so as to surround the four sides. It is comprised from four wall parts 42a-42d substantially orthogonal to. The casing 36 is arranged such that the first flat plate portion (first surface) 38 faces the imaging device 22 and the second flat plate portion (second surface) 40 faces the operating table 16 (see FIG. 5).

  Inside the radiation detection cassette 24, a grid 46 for removing scattered radiation of the radiation X by the patient 14 from the irradiation surface 44 side of the casing 36 to which the radiation X is irradiated, and radiation for detecting the radiation X transmitted through the patient 14. The detector 48 and the lead plate 50 that absorbs the back scattered radiation of the radiation X are arranged in this order. In addition, you may comprise the irradiation surface 44 of the casing 36 as a grid.

  The casing 36 includes a battery 52 that is a power source of the radiation detection cassette 24, a cassette control unit 54 that drives and controls the radiation detector 48 using electric power supplied from the battery 52, and the radiation detector 48. A transceiver 56 that transmits and receives a signal including information on the detected radiation X to and from the console 28 and a temperature detection unit (temperature detection means) 58 that can detect the surface temperature of the casing 36 are housed.

  The temperature detection unit 58 includes, for example, a thermocouple, an infrared sensor, and the like, and is opposite to the first detection unit 60 provided on the first flat plate portion 38 of the casing 36 having the irradiation surface 44 and the irradiation surface 44. The second detector 62 is provided on the second flat plate portion 40 of the casing 36 (see FIGS. 2 and 4).

  The first detection unit 60 includes a plurality (e.g., eight) of sensor plates (detection sensors) 64, and is provided on the inner wall surface of the first flat plate portion 38 in the vicinity of the opposed wall portions 42a and 42c in the casing 36. And provided on the inner wall surface of the first flat plate portion 38 in the vicinity of the wall portions 42b and 42c. And it provides so that the surface temperature of each site | part in the 1st flat plate part 38 with which each sensor plate 64 was mounted | worn can be detected.

  Similar to the first detection unit 60, the second detection unit 62 includes a plurality of (for example, eight) sensor plates (detection sensors) 66, and is a second flat plate portion in the vicinity of the opposed wall portions 42 a and 42 c in the casing 36. 40 is provided on the inner wall surface of the first flat plate portion 38 in the vicinity of the wall portions 42b and 42c. And it provides so that the surface temperature of each site | part in the 2nd flat plate part 40 with which each sensor plate 66 was mounted | worn can be detected. Further, as shown in FIG. 3, the sensor plates 64 and 66 are preferably arranged on at least a center line passing through the photographing center C, respectively. By arranging in this way, the affected area of the patient 14 is often placed at the imaging center C and imaging is often performed. Therefore, the body temperature of the patient 14 is more reliably detected through the first and second flat plate portions 38 and 40. It becomes possible to do.

Further, the sensor plates 64 and 66 constituting the first and second detection units 60 and 62 may be embedded in the first and second flat plate portions 38 and 40. Thereby, the surface temperature of the casing 36 can be detected with higher accuracy.

  The temperature data detected by the first and second detection units 60 and 62 is transmitted to the console 28 through the transceiver 56 of the radiation detection cassette 24.

  The cassette control unit 54, the transceiver 56, and the temperature detection unit 58 are provided with a lead plate or the like on the irradiation surface 44 side of the casing 36 in order to avoid damage caused by irradiation with the radiation X as a detection signal. It is preferable to keep it.

  FIG. 6 is a block diagram of the circuit configuration of the radiation detector 48. The radiation detector 48 has a photoelectric conversion layer 69 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) 70. After the generated charge is stored in the storage capacitor 71, the TFTs 70 are sequentially turned on for each row, and the charge is read as an image signal. In FIG. 6, only the connection relationship between one pixel 68 including the photoelectric conversion layer 69 and the storage capacitor 71 and one TFT 70 is shown, and the configuration of the other pixels 68 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 48 in the radiation detection cassette 24.

  A gate line 72 extending parallel to the row direction and a signal line 74 extending parallel to the column direction are connected to the TFT 70 connected to each pixel 68. Each gate line 72 is connected to a line scanning drive unit 76, and each signal line 74 is connected to a multiplexer 84 constituting a reading circuit.

  Control signals Von and Voff for controlling on / off of the TFTs 70 arranged in the row direction are supplied from the line scanning drive unit 76 to the gate line 72. In this case, the line scan driving unit 76 includes a plurality of switches SW1 for switching the gate lines 72 and an address decoder 78 for outputting a selection signal for selecting one of the switches SW1. An address signal is supplied from the cassette control unit 54 to the address decoder 78.

  Further, the charge held in the storage capacitor 71 of each pixel 68 flows out to the signal line 74 via the TFTs 70 arranged in the column direction. This charge is amplified by the amplifier 80. A multiplexer 84 is connected to the amplifier 80 via a sample and hold circuit 82. The multiplexer 84 includes a plurality of switches SW2 for switching the signal line 74 and an address decoder 86 for outputting a selection signal for selecting one of the switches SW2. An address signal is supplied from the cassette control unit 54 to the address decoder 86. An A / D converter 88 is connected to the multiplexer 84, and radiation image information converted into a digital signal by the A / D converter 88 is supplied to the cassette control unit 54.

  FIG. 7 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 90, a radiation source 92 that outputs radiation X, and wireless communication from the console 28, and transmits and receives an imaging completion signal and the like to the console 28 by wireless communication. 94 and a radiation source control unit 96 that controls the radiation source 92 based on the imaging start signal supplied from the imaging switch 90 and the imaging conditions supplied from the transceiver 94.

  The radiation detection cassette 24 accommodates a radiation detector 48, a battery 52, a cassette control unit 54, a transceiver 56 and a temperature detection unit 58.

  The cassette controller 54 is detected by the radiation detector 48 and an address signal generator 98 that supplies an address signal to the address decoder 78 of the line scan driver 76 and the address decoder 86 of the multiplexer 84 that constitute the radiation detector 48. An image memory 100 for storing the radiographic image information, and a cassette ID memory 102 for storing cassette ID information for specifying the radiation detection cassette 24.

  The transceiver 56 receives a transmission request signal by wireless communication from the console 28, while for the console 28, cassette ID information stored in the cassette ID memory 102, radiation image information stored in the image memory 100, temperature A detection signal based on the detection result of the detection unit 58 is transmitted by wireless communication.

  The display device 26 displays a receiver 104 that receives radiation image information from the console 28, a display control unit 106 that performs display control of the received radiation image information, and the radiation image information processed by the display control unit 106. And a display unit (warning means) 108.

  The console 28 is necessary for radiographing by the radiographing device 22 and the transceiver 110 that transmits and receives necessary information including radiographic image information, position information, and the like to the radiographing device 22, the radiation detection cassette 24, and the display device 26. An imaging condition management unit 112 that manages various imaging conditions, an image processing unit 114 that performs image processing on radiation image information transmitted from the radiation detection cassette 24, an image memory 116 that stores processed radiation image information, and an imaging target The patient information management unit 118 that manages patient information of the patient 14, the cassette information management unit 120 that manages the cassette information transmitted from the radiation detection cassette 24, and the radiation detection cassette based on the detection result of the temperature detection unit 58. And a state determination unit (determination unit) 122 that determines the installation state of 24.

  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 imaging system 10 using the radiation detection cassette 24 of the present exemplary embodiment is basically configured as described above. Next, the operation thereof will be described.

  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 118 of the console 28 before imaging. In addition, when an imaging region and an imaging method are determined in advance, these imaging conditions are registered in the imaging condition management unit 112 in advance. In the state where the above preparatory work is completed, the operation for the patient 14 is performed.

  When radiographing is performed during surgery, the doctor 18 or the radiographer in charge takes the first plate 38 of the casing 36 at the imaging device 22 and patient 14 side at a predetermined position between the patient 14 and the operating table 16. The radiation detection cassette 24 is installed so that the second flat plate portion 40 is on the operating table 16 side (arrow B direction) (see arrow A direction) (see FIG. 5).

  At this time, since the first flat plate portion 38 is in contact with the patient 14, the first flat plate portion 38 is heated by the body temperature of the patient 14, and the temperature gradually increases. On the other hand, the second flat plate portion Since 40 is in contact with the operating table 16, the temperature does not increase and is maintained at a substantially constant temperature.

  The temperature of the first flat plate portion 38 is detected by the first detector 60 including the plurality of sensor plates 64, and the temperature of the second flat plate portion 40 is detected by the second detector 62 including the plurality of sensor plates 66. The detection result is output as a detection signal to the transceiver 56 and then input to the state determination unit 122 through the transceiver 110 of the console 28. In this case, since a plurality of sensor plates 64 and 66 are provided at predetermined intervals in the first and second flat plate portions 38 and 40, temperature detection is surely performed regardless of the contact portion of the patient 14 with respect to the casing 36. Can be done.

  The state determination unit 122 compares the temperature (T1) detected by the first detection unit 60 with the temperature (T2) detected by the second detection unit 62 based on the detection signal, and has an irradiation surface 44. The temperature (T1) of the first detection unit 60 that detects the temperature of the first flat plate portion 38 is the temperature of the second detection unit 62 that detects the temperature of the second flat plate portion 40 on the side opposite to the irradiation surface 44 ( Since it is higher than T2) (T1> T2), it is determined that the first flat plate portion 38 having the irradiation surface 44 faces the patient 14 and the imaging device 22 (see FIG. 5). That is, it is confirmed that the irradiation surface 44 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 90 to shoot.

  On the other hand, when the first flat plate portion 38 having the irradiation surface 44 is mistakenly installed so as to be on the operating table 16 side (arrow B direction) for some reason, the second flat plate portion 40 is connected to the imaging device 22 and the patient 14. Since the temperature (T2) of the second flat plate portion 40 is increased by the body temperature of the patient 14, the first flat plate portion 38 abuts on the operating table 16. Therefore, the temperature (T1) is maintained at a substantially constant temperature without increasing.

  And the temperature of the 1st and 2nd flat plate parts 38 and 40 is each detected by the 1st and 2nd detection parts 60 and 62, The detection result is input into the state determination part 122 through the transceivers 56 and 110 as a detection signal. Is done. In this state determination unit 122, the temperature (T1) detected by the first detection unit 60 and the temperature (T2) detected by the second detection unit 62 are compared, and the temperature (T1) of the first detection unit 60 is compared. ) Is lower than the temperature (T2) of the second detection unit 62 (T1 <T2), the first flat plate portion 38 having the irradiation surface 44 does not face the patient 14 and the imaging device 22 side (arrow A direction), It is determined that the second flat plate portion 40 is erroneously facing the patient 14 and the imaging device 22 side (arrow A direction). That is, the irradiation surface 44 of the radiation detection cassette 24 is not installed so as to be on the imaging apparatus 22 side (arrow A direction), but is installed so as to be on the operating table 16 side (arrow B direction). It is confirmed.

  In this case, the radiation X from the imaging device 22 is not irradiated to the affected part of the patient 14 and the radiation detector 48 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 122 to the display device 26 via the transceiver 94. Accordingly, the console 28, the display device 26, and the like are displayed as a warning that the irradiation surface 44 of the radiation detection cassette 24 is not installed in a predetermined direction so as to face the imaging device 22 side (arrow A direction). . In addition, when the radiation detection cassette 24 is installed in an incorrect direction, not only a warning is displayed, but also control is performed from the console 28 to the radiation source control unit 96 of the imaging apparatus 22 based on an output signal from the state determination unit 122. A signal may be output to prohibit the photographing operation by the photographing device 22.

  Further, when the radiation detection cassette 24 is installed in the correct orientation so that the irradiation surface 44 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.

  Furthermore, 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.

  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 44 is located on the imaging device 22 side. The direction is changed so as to be (arrow A direction), and it is installed again with respect to the predetermined position.

  As described above, after confirming that the radiation detection cassette 24 is installed at the predetermined position so that the irradiation surface 44 is on the imaging device 22 side (arrow A direction), the imaging switch 90 is operated. Take a picture. As a result, the radiation source control unit 96 of the imaging apparatus 22 acquires the imaging conditions related to the imaging region of the patient 14 by wireless communication from the imaging condition management unit 112 of the console 28 via the transceivers 94 and 110. By controlling the radiation source 92 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 48 after the scattered radiation is removed by the grid 46 of the radiation detection cassette 24, and is electrically supplied by the photoelectric conversion layer 69 of each pixel 68 constituting the radiation detector 48. It is converted into a signal and held as a charge in the storage capacitor 71 (see FIG. 6). Next, the charge information that is the radiographic image information of the patient 14 held in each storage capacitor 71 is in accordance with the address signal supplied from the address signal generator 98 constituting the cassette controller 54 to the line scan driver 76 and the multiplexer 84. Read out.

  That is, the address decoder 78 of the line scan driver 76 outputs a selection signal according to the address signal supplied from the address signal generator 98, selects one of the switches SW1, and the TFT 70 connected to the corresponding gate line 72. A control signal Von is supplied to the gates of the first and second gates. On the other hand, the address decoder 86 of the multiplexer 84 outputs a selection signal in accordance with the address signal supplied from the address signal generation unit 98, sequentially switches the switch SW2, and is connected to the gate line 72 selected by the line scan driving unit 76. Radiation image information which is charge information held in the storage capacitor 71 of each pixel 68 is read out via a signal line 74.

  The radiation image information read from the storage capacitor 71 of each pixel 68 connected to the selected gate line 72 of each radiation detector 48 is amplified by each amplifier 80 and then sampled by the sample and hold circuit 82. The signal is supplied to the A / D converter 88 via the multiplexer 84 and converted into a digital signal. The radiographic image information converted into the digital signal is temporarily stored in the image memory 100 of the cassette control unit 54 and then transmitted to the console 28 by wireless communication via the transceiver 56.

  Similarly, the address decoder 78 of the line scan driving unit 76 sequentially switches the switch SW 1 according to the address signal supplied from the address signal generating unit 98, and the storage capacitor 71 of each pixel 68 connected to each gate line 72. The stored radiation image information, which is charge information, is read out via the signal line 74 and stored in the image memory 100 of the cassette control unit 54 via the multiplexer 84 and the A / D converter 88.

  The radiographic image information transmitted to the console 28 is received by the transceiver 110 and subjected to predetermined image processing in the image processing unit 114 and then associated with the patient information of the patient 14 registered in the patient information management unit 118. Stored in the image memory 116.

  The radiographic image information subjected to the image processing is transmitted from the transceiver 110 to the display device 26. The display device 26 that has received the radiation image information by the receiver 104 controls the display unit 108 by the display control unit 106 to display the radiation image. The doctor 18 performs the operation while checking the radiation image displayed on the display unit 108.

  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 the above-described embodiment, the first and second detection units 60 and 62 constituting the temperature detection unit 58 are provided, and the temperatures of the first and second flat plate portions 38 and 40 in the casing 36 can be detected, respectively. However, the present invention is not limited to this. For example, only one of the first and second detection units 60 and 62 may be provided. In this case, the temperature that rises when the patient 14 comes into contact with the first flat plate portion 38 or the second flat plate portion 40 of the casing 36 is set in advance, and the first detection unit 60 or the second detection unit 62 The state determination unit 122 compares and determines whether or not the temperature detected by either one has reached a preset temperature. Accordingly, whether or not either the first flat plate portion 38 or the second flat plate portion 40 provided with the first detection unit 60 or the second detection unit 62 is disposed on the patient 14 and the imaging apparatus 22 side. Can be confirmed.

  As described above, in the present embodiment, the casing 36 constituting the radiation detection cassette 24 includes the first flat plate portion 38 facing the imaging apparatus 22 and the second flat plate portion facing the operating table 16 on which the patient 14 is lying. 40, the temperature is detected by first and second detectors 60, 62 provided in the first and second flat plate portions 38, 40, respectively, and the detected temperatures are compared to compare the detected temperatures. It can be confirmed that either one of the second flat plate portions 38 and 40 is disposed on the patient 14 side. Based on the detection results of the first and second detection units 60 and 62, it is determined in advance which surface of the first and second flat plate portions 38 and 40 in the casing 36 is disposed on the imaging device 22 side. Can be sensed. Therefore, from this detection result, the radiation detection cassette 24 can be reliably arranged so that the irradiation surface 44 is on the imaging device 22 side, and accordingly, erroneous imaging is prevented, so that the imaging operation is efficiently performed. Can do.

  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 internal configuration perspective view of a radiation detection cassette. It is a top view of the radiation detection cassette shown in FIG. It is a longitudinal cross-sectional view of the radiation detection cassette shown in FIG. It is an enlarged side view which shows the patient and radiation detection cassette vicinity in the operating room of FIG. It is a circuit block diagram of a radiation detector. 1 is a configuration block diagram of a radiographic image capturing system.

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 36 ... Casing 38 ... 1st flat plate part 40 ... 2nd flat plate part 44 ... Irradiation surface 48 ... radiation detectors 56, 94, 110 ... transceiver 58 ... temperature detection unit 60 ... first detection unit 62 ... second detection unit 64, 66 ... sensor plate 92 ... radiation source 122 ... state determination unit

Claims (5)

A housing that contains a radiation conversion panel that detects radiation that has been irradiated from a radiation source and transmitted through a subject, and that can be converted into radiation image information;
The housing is provided on at least one of the first surface facing the radiation source and the subject and the second surface opposite to the first surface across the radiation conversion panel. Temperature detecting means capable of detecting the surface temperature of
A cassette characterized by comprising. The cassette of claim 1,
The temperature detection means includes a plurality of detection sensors provided on at least one of the first surface and the second surface of the housing, and the detection sensors are spaced apart from each other by a predetermined distance on the first surface and the second surface. A cassette characterized in that it is arranged. The cassette according to claim 1 or 2,
The cassette according to claim 1, wherein the temperature detecting means is an infrared sensor capable of detecting infrared energy of the casing. An imaging unit having a radiation source capable of emitting radiation;
A cassette having a radiation conversion panel that is installed at a position facing the imaging unit with a subject interposed therebetween, detects radiation irradiated from the radiation source and transmitted through the subject, and converts the radiation into radiation image information;
The cassette is provided on at least one of the first surface facing the imaging unit and the subject and the second surface opposite to the first surface across the radiation conversion panel. Temperature detecting means capable of detecting the surface temperature;
Determination means for determining whether or not the imaging surface of the radiation conversion panel is arranged on the imaging unit side based on a detection result by the temperature detection means;
A radiographic imaging system comprising: The system of claim 4, wherein
A radiographic imaging system comprising warning means for giving a warning when an imaging surface of the radiation conversion panel is not arranged on the imaging unit side based on a detection result by the temperature detection means.

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