JP2010145349A - Radiation detection apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an X ray detection apparatus 11 for detachably fixing an X ray detection panel 12 without generating an influence for X ray detection. <P>SOLUTION: The radiation detection apparatus fixes a support member 13 in an external enveloping unit 18, arranges an intermediate member 16 and an X ray detection panel 12 on the support member 13, and arranges a sandwiching member 17 formed in the peripheral part outside b of an effective region of the X ray detection panel 12. The intermediate member 16 and the sandwiching member 17 are formed of thermal plastic gel materials. The X ray detection panel 12 is sandwiched between the support member 13 and the sandwiching member 17 by assembling the external enveloping unit 18. When the external enveloping unit 18 is dismantled, the sandwiching of the X ray detection panel 12 is released, and the X ray detection panel 12 is removed from the support member 13. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a radiation detection apparatus that detects radiation.

  Conventionally, X-ray detectors that detect radiation, particularly X-rays, are used in a wide range of fields such as industrial nondestructive inspection, medical diagnosis, and scientific research such as structural analysis.

  Among X-ray detection devices, as a highly sensitive and sharp device, an X-ray is formed on a photodetector having a photoelectric conversion element portion in which a plurality of photosensors and TFTs (Thin Film Transistors) are two-dimensionally arranged. There is known an X-ray detection apparatus including an X-ray detection panel in which a phosphor layer that directly converts light into light that can be detected by a photoelectric conversion element portion is formed.

  The X-ray detection panel is disposed on one surface of a plate-like support member, and is supported in the envelope by this support member.

  In a conventional X-ray detection apparatus, an X-ray detection panel is fixed on a support member with an adhesive (for example, see Patent Document 1).

Alternatively, the cushion material is disposed in a compressed state between the entire effective area of the X-ray detection panel and the envelope, and the X-ray detection panel is pressed and fixed to the support member by the repulsive force of the cushion material.
JP 2002-14168 (page 4, FIG. 1)

  However, in an X-ray detection apparatus for bonding and fixing an X-ray detection panel, it takes a long time to bond and fix the X-ray detection panel, and it becomes difficult to disassemble and collect the X-ray detection panel after bonding and fixing. There's a problem.

  Further, in the X-ray detection apparatus that presses and fixes the X-ray detection panel to the support member with a cushion material that covers the effective area of the X-ray detection panel, the X-ray detection panel receives the X-rays that have passed through the cushion material. There is a problem that the influence of the cushion material may appear in the detection image, or the effective area of the X-ray detection panel may be damaged by the pressing of the cushion material.

  The present invention has been made in view of the above points, and an object of the present invention is to provide a radiation detection apparatus capable of detachably fixing a radiation detection panel without affecting radiation detection.

  The present invention provides a radiation detection panel in which an effective region for detecting radiation is formed at the center of one surface, a support member for disposing the other surface of the radiation detection panel, and the radiation detection panel disposed on the support member. A clamping member that clamps a peripheral portion outside the effective region between the supporting member and the support member.

  According to the present invention, since the peripheral portion outside the effective area of the radiation detection panel arranged on the support member is sandwiched between the support member and the sandwiching member, the radiation detection panel does not affect radiation detection. Can be fixed detachably.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

  1 is a sectional view of a part of an X-ray detection apparatus as a radiation detection apparatus, FIG. 2 is a front view of an X-ray detection panel of the X-ray detection apparatus, and FIG. 3 is a part of the X-ray detection panel of the X-ray detection apparatus. FIG.

  An X-ray detection device 11 as a radiation detection device includes an X-ray detection panel 12 as a radiation detection panel, a plate-like support member 13 that supports the X-ray detection panel 12 on one surface, and is supported on the other surface of the support member 13. A circuit board 14 that electrically drives the X-ray detection panel 12, a flexible circuit board 15 that electrically connects the X-ray detection panel 12 and the circuit board 14, and a space between the X-ray detection panel 12 and the support member 13. An intermediate member 16 disposed between the support member 13 and the intermediate member 16 disposed on the support member 13 includes a sandwiching member 17 that sandwiches the X-ray detection panel 12, an envelope 18 that accommodates the sandwiching member 17, and the like.

  The X-ray detection panel 12 has a photodetector 21 as a photoelectric conversion substrate, and X-rays can be detected by the photodetector 21 on one surface of the photodetector 21 on the incident surface side of X-rays as radiation. The phosphor layer 22 that converts light into direct light is directly formed.

  The photodetector 21 has a glass substrate 23, and CsI is used in correspondence with a plurality of pixels arranged in a two-dimensional manner in an effective region a of X-ray detection on one surface of the glass substrate 23. A plurality of photosensors and TFTs are two-dimensionally arranged, and a photoelectric conversion element unit 24 that converts light into an electric signal is formed. Further, a wiring portion 25 connected to the photoelectric conversion element portion 24 is formed on one surface of the glass substrate 23, and wiring is provided on the peripheral portion of the one surface of the glass substrate 23, which is outside the effective region of X-ray detection. A charge extraction portion (electrode pad portion) 26 connected to the portion 25 is formed.

  The support member 13 is made of, for example, metal and is formed in a square plate shape, and is connected and fixed to the envelope 18 at the time of assembly.

  The circuit board 14 includes a control board (not shown) for controlling the X-ray detection panel 12 and an analog circuit board 31 having at least one function of receiving, processing, and converting into a digital signal an analog signal from the flexible circuit board 15. A digital circuit board (not shown) having at least one function of control of other boards and communication with the outside of the X-ray detection device 11, a power supply circuit board (not shown) for supplying power to the other boards, etc. It has. The circuit board 14 is supported in a state separated from the other surface of the support member 13 by a plurality of spacers 32.

  The flexible circuit board 15 includes a flexible board 41 and an IC mounting board 42 connected to one end of the flexible board 41, and an integrated circuit 43 for detection is mounted on the IC mounting board 42. The other end of the flexible substrate 41 is disposed on the charge extraction portion 26 of the X-ray detection panel 12 via an anisotropic conductive adhesive 44 and bonded by thermocompression bonding. A connector 45 is provided at one end of the IC mounting board 42, and the IC mounting board 42 is connected to the analog circuit board 31 by this connector 45.

  The intermediate member 16 is made of a material having elasticity and vibration resistance, such as a resin material such as a thermoplastic gel material or a rubber material. The intermediate member 16 is formed in a sheet shape and has an effective area a of the X-ray detection panel 12. It is formed in a larger area and has the same shape and the same area as the outer shape of the glass substrate 23 of the X-ray detection panel 12.

  The sandwiching member 17 is made of a material having elasticity, vibration proofing, and heat conductivity, such as a resin material such as a thermoplastic gel material, or a rubber material. It is formed in the shape of a quadrangular frame that can come into contact with the outside b of the effective area, which is the peripheral part outside the effective area a, and the X-ray detection panel 12 and the intermediate between the support member 13 and the envelope 18 during assembly. It is held together with the member 16 in a compressed state. The place where the clamping member 17 abuts on the X-ray detection panel 12 is outside the effective area of the X-ray detection panel 12 and is on the charge extraction unit 26 or on the flexible circuit board 15 connected to the charge extraction unit 26. Yes.

  The envelope 18 also has a box-shaped casing 51 that opens the X-ray incident surface side of the X-ray detection panel 12 and an opening 52 that corresponds to the effective area a of the X-ray detection panel 12. A frame-like cover 53 attached to the opening side of the housing 51, and an X-ray transmissive entrance window 54 covering the opening 52 of the cover 53. Outside the casing 51, a cooling mechanism (not shown) such as a fan for cooling the heat transmitted to the casing 51 is disposed. The cover 53 may be provided with a positioning portion such as a protrusion for positioning and holding the clamping member 17, or the clamping member 17 may be bonded and fixed with an adhesive or the like.

  When the X-ray detection device 11 is assembled, the X-ray detection panel 12 is disposed on the support member 13 fixed in the casing 51 via an intermediate member, and the X-ray detection panel 12 is located outside the effective region b. The intermediate member 16, the X-ray detection panel 12, and the sandwiching member 17 are sandwiched between the support member 13 and the cover 53 by attaching the cover 53 to the casing 51 by bringing the sandwiching member 17 into contact with the peripheral portion. Thereby, for example, the sandwiching member 17 and the intermediate member 16 formed of a thermoplastic gel material are compressed to generate a repulsive force, and the X-ray detection panel 12 is pressed against the support member 13 by the repulsive force. Hold it.

  In this way, the X-ray detection panel 12 detects X-rays in order to sandwich the peripheral portion outside the effective region b of the X-ray detection panel 12 disposed on the support member 13 between the support member 13 and the sandwiching member 17. The X-ray detection panel 12 can be detachably fixed without causing an influence on the above. Therefore, if the cover 53 is removed from the casing 51, the holding of the X-ray detection panel 12 can be released, and the X-ray detection panel 12 can be easily detached from the support member 13.

  Further, since the intermediate member 16 is disposed between the support member 13 and the X-ray detection panel 12, the X-ray detection panel 12 can be held between the intermediate member 16 and the holding member 17, and the X-ray detection panel can be held. 12 anti-vibration functions can be obtained.

  Further, if the sandwiching member 17 and the intermediate member 16 are formed of a thermoplastic gel material, the vibration isolating property of the X-ray detection panel 12 can be improved.

  In addition, since the clamping member 17 presses the connection portion of the flexible circuit board 15 against the X-ray detection panel 12, the flexible circuit board 15 can be prevented from peeling off from the X-ray detection panel 12, and the connection reliability is improved. it can.

  Further, since the sandwiching member 17 is in contact with the envelope 18, the heat of the X-ray detection panel 12 can be conducted from the sandwiching member 17 to the envelope 18 to be dissipated, and the X-ray detection panel 12 The increase in operating temperature can be reduced, and the occurrence of image unevenness can be suppressed.

  Further, since the intermediate member 16 has an area larger than the effective area a of the X-ray detection panel 12, it can be reliably supported.

  The clamping member 17 clamps the X-ray detection panel 12 by contact with the cover 53 of the envelope 18. However, the present invention is not limited to this, and X-ray detection is performed by contact with the housing 51 and the incident window 54. The panel 12 may be sandwiched.

1 is a partial cross-sectional view of an X-ray detection apparatus as a radiation detection apparatus showing an embodiment of the present invention. It is a front view of the X-ray detection panel of an X-ray detection apparatus same as the above. It is sectional drawing of a part of X-ray detection panel of an X-ray detection apparatus same as the above.

Explanation of symbols

11 X-ray detector as a radiation detector
12 X-ray detection panel as a radiation detection panel
13 Support member
14 Circuit board
15 Flexible circuit board
16 Intermediate member
17 Holding member
18 Enclosure a Effective area b Outside effective area

Claims (6)

A radiation detection panel in which an effective area for detecting radiation is formed in the center of one surface;
A support member for disposing the other surface of the radiation detection panel;
A radiation detection apparatus comprising: a holding member that holds a peripheral portion outside the effective area of the radiation detection panel disposed on the support member between the support member and the support member. The radiation detection apparatus according to claim 1, further comprising an intermediate member disposed between the support member and the other surface of the radiation detection panel. The radiation detecting apparatus according to claim 2, wherein the sandwiching member and the intermediate member are made of a thermoplastic gel material. A circuit board for driving the radiation detection panel;
A flexible circuit board connected to the radiation detection panel at a peripheral portion outside an effective area, and electrically connecting the radiation detection panel and the circuit board;
The radiation detection apparatus according to claim 1, wherein the clamping member presses a connection portion of the flexible circuit board against the radiation detection panel. An envelope containing the radiation detection panel;
The radiation detection apparatus according to claim 1, wherein the clamping member is in contact with the envelope. The radiation detection apparatus according to claim 1, wherein the intermediate member has an area larger than an effective area of the radiation detection panel.

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