JP2012037274A - Radiation detector stand and radiation detection apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a radiation detector stand capable of installing a plurality of radiation detectors and an adjuster with a high positional precision, and a radiation detection apparatus.SOLUTION: A radiation detector stand 10 according to an embodiment includes a first support 12 and a second support 13. The first support 12 has: a plurality of first channels 124 which are arranged side by side at predetermined intervals corresponding to intervals at which a plurality of radiation detectors 2 for detecting radial rays 4 are arranged side by side, and to which the plurality of radiation detectors 2 are inserted; and a guide section 121a and a guide section 121b for guiding the installation of a collimator 3 provided above an incidence plane 210 to which the radial rays 4 of the radiation detectors 2 are made incident for adjusting an incidence direction of the radial rays 4. The second support 13 has: a plurality of second channels 134 which are arranged side by side at predetermined intervals, and to which a plurality of radiation detectors 2 are inserted; and a guide section 131a and a guide section 131b which are provided above the incidence plane 210 for guiding the installation of the collimator 3. The second support 13 is disposed in parallel with the first support 12.

Description

  The present invention relates to a radiation detector stand and a radiation detection apparatus.

  As a conventional technique, a rectangular frame having a thick part and a thin part provided on the thick part and a plurality of semiconductor cells for detecting radiation are arranged two-dimensionally and fitted into the thick part. A radiation detection unit, a collimator that is fitted in the thin portion so as to cover the upper part of the radiation detection unit, controlling the incident direction of the radiation, and a liquid crystal display device provided on a frame on the opposite side of the collimator via the radiation detection unit Are known (see, for example, Patent Document 1).

  Since the probe for nuclear medicine diagnosis described in Patent Document 1 can be imaged in close proximity to or in contact with the body surface of a subject, the lesion and pathology of a malignant tumor can be clearly imaged during the operation, Direct observation and monitoring at hand.

Japanese Patent Laid-Open No. 2001-324569

  However, since the probe for nuclear medicine diagnosis according to Patent Document 1 is fitted and fixed to the thick part of the frame, the semiconductor cell may be destroyed, and the position of the frame and the radiation detection part The accuracy may exceed the allowable range. Furthermore, since the nuclear medicine diagnostic probe according to Patent Document 1 is fixed by fitting the collimator into the thin part, the positional accuracy between the frame and the collimator may exceed the allowable range. The relative position tolerance may exceed the allowable range.

  Accordingly, an object of the present invention is to provide a radiation detector stand and a radiation detection apparatus capable of installing a plurality of radiation detectors and adjusters with high positional accuracy.

  In order to achieve the above object, the present invention arranges a plurality of radiation detectors in which a plurality of radiation detectors are inserted while being arranged at a predetermined interval corresponding to an interval in which a plurality of radiation detectors for detecting radiation are arranged. A first support body having a first groove and a first guide portion that is provided above an incident surface on which radiation of the radiation detector is incident and guides the installation of an adjuster that adjusts the incident direction of the radiation; A plurality of second grooves in which a plurality of radiation detectors are inserted, and a second guide portion that is provided above the incident surface and guides the installation of the adjuster. And a second support disposed parallel to the first support. A radiation detector stand is provided.

  In addition, the first support body includes a first support portion in which a first groove is formed, and a thickness smaller than the first support portion on the first support portion. A first adjuster support formed, and the second support includes a second support formed with a second groove and a second support on the second support. A second adjuster support portion having a thickness smaller than that of the support portion and formed with a second guide portion, a boundary between the first support portion and the first adjuster support portion, and a second adjuster support portion. The interval between the adjuster and the incident surface of the radiation detector may be set by the boundary between the support portion and the second adjuster support portion.

  Each of the plurality of radiation detectors is connected between a support plate on which the first support and the second support are mounted, and the first support and the second support. And a plurality of connection members for connecting the plurality of radiation detectors to each other.

  The first support and the second support are preferably formed using a metal material.

  The side surface of the first support body opposite to the side surface where the first groove is formed and the side surface of the second support body opposite to the side surface where the second groove is formed It is preferable to have a radiation fin.

  Moreover, it is preferable that the said support plate is formed using a metal material, and has a several radiation fin in the surface on the opposite side to the surface in which a 1st support body and a 2nd support body are installed.

  Also, a plurality of radiation detectors that detect radiation, an adjuster that is installed above the radiation detector and adjusts the incident direction of the radiation, and a predetermined interval corresponding to an interval at which the plurality of radiation detectors are arranged. And a first support body having a plurality of first grooves into which a plurality of radiation detectors are inserted and a first guide portion for guiding the installation of the adjuster, A plurality of second grooves into which a plurality of radiation detectors are inserted, and a second guide portion that is provided above the incident surface and guides the installation of the adjuster. Between the 2nd support body arrange | positioned in parallel with a 1st support body, the support plate which mounts a 1st support body and a 2nd support body, and a 1st support body and a 2nd support body Each of the plurality of radiation detectors is connected to the electric circuit and each of the plurality of radiation detectors. The radiation detecting device comprising a plurality of connecting members, and the radiation detector stand with a for connection is provided with.

  According to the radiation detector stand and the radiation detection apparatus according to the present invention, it is possible to provide a radiation detector stand and a radiation detection apparatus that can install a plurality of radiation detectors and adjusters with high positional accuracy.

FIG. 1 is an exploded perspective view of the radiation detection apparatus according to the embodiment. FIG. 2A is a perspective view of a support plate on which a substrate according to an embodiment is installed. FIG. 2B is a side view of the support plate on which the substrate according to the embodiment is installed. FIG. 3A is a perspective view of the first support according to the embodiment. FIG. 3B is a perspective view of the second support according to the embodiment. FIG. 3C (a) is a side view of the first support according to the embodiment, and (b) is a side view of the second support. FIG. 4 is a schematic view of the radiation detector stand in which the radiation detector according to the embodiment is inserted as viewed from the direction in which the fixing plate is installed. FIG. 5 is a top view of the collimator according to the embodiment. FIG. 6 is a perspective view of the radiation detector according to the exemplary embodiment.

[Summary of embodiment]
The radiation detector stand 10 according to the embodiment is arranged at a predetermined interval corresponding to the interval at which the plurality of radiation detectors 2 for detecting the radiation 4 are arranged, and the plurality of radiation detectors 2 are inserted. A plurality of first grooves 124 and a first guide that guides the installation of the collimator 3 as an adjuster that is provided above the incident surface 210 on which the radiation 4 of the radiation detector 2 enters and adjusts the incident direction of the radiation 4. A first support 12 having a guide part 121a and a guide part 121b as guide parts of the first and second guides 12 are arranged at predetermined intervals and a plurality of second detectors into which a plurality of radiation detectors 2 are inserted. It has a groove 134 and a guide part 131 a and a guide part 131 b as a second guide part that are provided above the incident surface 210 and guide the installation of the collimator 3, and are arranged in parallel to the first support 12. Be done It comprises a second support 13.

[Embodiment]
(Outline of configuration of radiation detection apparatus 1)
FIG. 1 is an exploded perspective view of the radiation detection apparatus according to the embodiment. This radiation detection apparatus 1 is a radiation detection apparatus that includes a plurality of radiation detectors 2 having a card shape and detects radiation 4 such as γ rays and X rays. For example, the radiation detection apparatus 1 is used for the purpose of detecting the radiation 4 in a nuclear medicine diagnosis apparatus such as a gamma camera, SPECT (Single Photon Emission Tomography), and PET (Positionon Emission Tomography).

  As shown in FIG. 1, the radiation detection apparatus 1 mainly includes a plurality of radiation detectors 2, a collimator 3 provided above the plurality of radiation detectors 2, a plurality of radiation detectors 2, and a collimator 3. Is fixed to the end of the radiation detector stand 10, the fixing plate 16 and the fixing plate 17 fixed to the end of the radiation detector stand 10 in the longitudinal direction, and the end of the radiation detector stand 10 in the short direction. A panel 18 is schematically configured. The radiation detection apparatus 1 is configured to detect the radiation 4 traveling from the upper side to the lower side of the paper surface of FIG.

  As an example, the radiation detection apparatus 1 has a quadrangular prism shape with a width in the longitudinal direction of about 150 mm and a width in the lateral direction of about 50 mm, which is the same as the height. Next, the outline of the configuration of the radiation detector stand 10 constituting the radiation detection apparatus 1 will be described below.

(Outline of configuration of radiation detector stand 10)
As shown in FIG. 1, the radiation detector stand 10 is schematically configured to include a support plate 11, and a first support 12 and a second support 13 provided on the support plate 11. . The first support 12 and the second support 13 are provided so as to be parallel to each other. The radiation detector stand 10 has a substantially U shape when viewed from the side on which the fixing plate 16 shown in FIG. 1 is installed, and includes a support plate 11, a first support 12, and a second support 13. A plurality of radiation detectors 2 are accommodated in the enclosed area. Subsequently, the details of the support plate 11 constituting the radiation detector stand 10 will be described first.

(Details of support plate 11)
2A is a perspective view of the support plate on which the substrate according to the embodiment is installed, and FIG. 2B is a side view of the support plate on which the substrate according to the embodiment is installed. As shown in FIG. 2A, the support plate 11 has a rectangular shape in a top view. The support plate 11 has a high thermal conductivity and is lightweight, and is preferably formed using a metal material that is easy to obtain dimensional accuracy by processing and has high mechanical strength. As an example, aluminum can be used.

  Further, as shown in FIGS. 2A and 2B, the support plate 11 is provided with a substrate 14 on the main surface 110 side. The substrate 14 is provided with an electronic component mounting portion 14 a on a surface 141 facing the main surface 110 of the support plate 11. The electronic component mounting unit 14a mounts an electronic component such as Application Specific Integrated Circuit (ASIC) or Field Programmable Gate Array (FPGA).

  Further, the support plate 11 has a plurality of heat radiation fins 112 on a surface 111 opposite to the main surface 110. The radiating fins 112 are provided to cool the radiation detection apparatus 1 by diffusing heat generated from the electronic components mounted on the electronic component mounting portion 14a into the atmosphere. The radiating fins 112 have a plate shape extending in the short direction of the support plate 11 and are arranged on the surface 111 of the support plate 11 at regular intervals.

  As shown in FIG. 2A, the substrate 14 has a rectangular shape in which the width in the short direction of the support plate 11 is narrowed, and a plurality of connectors 152 as connecting members are provided on the main surface 140 at regular intervals. It has been. The substrate 14 is, for example, a printed circuit board (for example, a glass epoxy substrate such as FR4) on which a conductive thin film (for example, copper foil) made of a conductive material such as a metal conductor is formed, a solder resist, or the like. And an insulating layer made of an insulating material.

  Further, the substrate 14 has a convex portion 142 and a convex portion 143 on the side surface on the first support 12 side. The substrate 14 has a concave portion 145 between the convex portion 142 and the convex portion 143. Further, the substrate 14 has a concave portion 144 at an end portion of the convex portion 142 on the fixing plate 17 side, and has a concave portion 146 at an end portion of the convex portion 143 on the fixing plate 16 side.

  As for this convex part 142 and the convex part 143, the insulating layer is stripped and the electroconductive thin film is exposed. A through hole 142 a and a through hole 142 b are formed in the convex portion 142. Moreover, the through-hole 143a and the through-hole 143b are formed in the convex part 143.

  The support plate 11 is formed with a through hole 113 corresponding to each of the through hole 142a, the through hole 142b, the through hole 143a, and the through hole 143b. Screws 114 are passed through the through hole 113, the through hole 142a, the through hole 142b, the through hole 143a, and the through hole 143b from the surface 111 side of the support plate 11 on which the radiation fins 112 are formed. Insert into a screw hole (not shown) and tighten. The first support 12 is fixed to the support plate 11 by this screw tightening.

  At the time of this fixing, a leg 120a of the first support 12 described later fits into the recess 146 of the substrate 14, a leg 120b described later fits into the recess 145, and a leg 120c described later fits into the recess 144, thereby providing the first support. The body 12 and the support plate 11 are fixed at a preset position. Moreover, since the electroconductive thin film is exposed, the electrical circuit of the 1st support body 12 and the electronic component mounting part 14a is electrically connected to the convex part 142 and the convex part 143. FIG. This exposed conductive thin film is connected to the ground of the electric circuit.

  Further, the substrate 14 has a convex portion 147 and a convex portion 148 on the side surface on the second support 13 side. The substrate 14 has a concave portion 150 between the convex portion 147 and the convex portion 148. Further, the substrate 14 has a concave portion 149 at the end portion of the convex portion 147 on the fixing plate 17 side, and a concave portion 151 at the end portion of the convex portion 148 on the fixing plate 16 side.

  In the same manner as the convex portions 142 and 143, the convex portions 147 and 148 have the insulating layer peeled off, and the conductive thin film is exposed. A through hole 147 a and a through hole 147 b are formed in the convex portion 147. Further, a through hole 148a and a through hole 148b are formed in the convex portion 148.

  The support plate 11 is formed with through holes (not shown) corresponding to the through holes 147a, the through holes 147b, the through holes 148a, and the through holes 148b. Screws 114 are passed through the through holes, the through holes 147a, the through holes 147b, the through holes 148a, and the through holes 148b from the surface 111 side of the support plate 11 on which the radiation fins 112 are formed. Insert into a screw hole (not shown) and tighten. By this screw tightening, the second support 13 is fixed to the support plate 11.

  At the time of fixing, a leg 130a of the second support 13 described later fits in the recess 151 of the substrate 14, a leg 130b described later fits in the recess 150, and a leg 130c described later fits in the recess 149, and the second support. The body 13 and the support plate 11 are fixed at a preset position. In addition, since the conductive thin film is exposed at the convex portion 147 and the convex portion 148, the electrical circuit of the second support 13 and the electronic component mounting portion 14a is electrically connected. This exposed conductive thin film is connected to the ground of the electric circuit.

  A plurality of connectors 152 are provided on the main surface 140 of the substrate 14. The connector 152 penetrates the substrate 14 and is electrically connected to the electronic component of the electronic component mounting portion 14a. A card edge portion, which will be described later, of the radiation detector 2 is inserted into the connector 152, and the terminal of the connector 152 and the pattern of the card edge portion are electrically connected.

(Details of the first support 12)
FIG. 3A is a perspective view of the first support according to the embodiment. FIG. 3B is a perspective view of the second support according to the embodiment. FIG. 3C (a) is a side view of the first support according to the embodiment, and (b) is a side view of the second support. FIG. 4 is a schematic view of the radiation detector stand in which the radiation detector according to the embodiment is inserted as viewed from the direction in which the fixing plate is installed. In FIG. 4, illustration of the fixed plate 16, the fixed plate 17, and the panel 18 is omitted. In FIG. 4, the collimator 3 is illustrated by a dotted line.

  As shown in FIG. 3A, the first support 12 is formed in a plate shape when viewed from the side surface 125, and the length in the longitudinal direction is substantially the same as the length in the longitudinal direction of the support plate 11. Have. The first support 12 is provided on the first support 120 and the first support 120 in which a plurality of first grooves 124 are formed on the side surface 122. And a first collimator support 121 as a first adjuster support that is thinner than the thickness. The first support 12 is preferably made of a metal material that has high thermal conductivity and is light in weight, easily obtains dimensional accuracy by processing, and has high mechanical strength. As an example, aluminum is used. it can.

  The first support unit 120 includes a leg 120a, a leg 120b, and a leg 120c having a convex shape that are in contact with the support plate 11 below the plane of FIG. 3A. A recess is formed between the leg 120a and the leg 120b and between the leg 120b and the leg 120c. In other words, heat exchange between the atmosphere at a high temperature inside the radiation detector stand 10 and the outside atmosphere is performed through the recess due to the formation of the recess. Moreover, the flow of heat from the support plate 11 to the first support 12 can be suppressed by forming the recess.

  The radiation detector 2 is inserted into each of the first grooves 124, and the radiation detector 2 is the first groove 124 by an elastic member described later provided between the recess 124 a of the first groove 124 and the radiation detector 2. The radiation detector 2 is pressed against the flat surface 124b of the groove 124, and the radiation detector 2 is fixed to the radiation detector stand 10 with high accuracy. By this fixing, as an example, the overall relative positional accuracy of the radiation detectors 2 when the radiation detectors 2 are arranged can be set to ± 0.1 mm. By this pressing, the heat of the radiation detector 2 is efficiently transmitted to the first support 12 and radiated.

  A contact surface 122 a is formed at the boundary between the side surface 122 and the first groove 124 at the top of the first groove 124. As shown in FIG. 4, the contact surface 122a comes into contact with a bottom 27a of a stopper 26a formed at one end of the radiation detector 2 described later when the radiation detector 2 is inserted into the radiation detector stand 10. . By this contact, positioning of the first support 12 between the radiation detector 2 and the radiation detector stand 10 in the short direction, that is, in the height direction is performed with high accuracy.

  As for the 1st collimator support part 121, the guide part 121a and the guide part 121b which guide installation of the collimator 3 are formed in the side surface 123 at the side by which the radiation detector 2 is arrange | positioned. The guide portion 121a and the guide portion 121b have a shape corresponding to the guided portion formed in the collimator 3 (in this embodiment, a semi-cylindrical shape), and are formed to extend from the upper surface 128 to the boundary 123a. The number and shape of the guide portions formed on the first support body 12 and the second support body 13 are not limited to the shape of the present embodiment, and can be freely changed.

  The boundary 123a is a step formed at the boundary between the first support part 120 and the first collimator support part 121. When the collimator 3 is installed, as shown in FIG. Contact. When the bottom part 300 contacts the boundary 123a, the distance d between the incident surface 210 of the radiation detector 2 and the bottom part 300 of the collimator 3 is maintained at a predetermined distance. In addition, this space | interval d is set in the range of 1 mm or more and 5 mm or less as an example. For example, the distance d is preferably as small as possible from the viewpoint of preventing crosstalk, and in order to avoid contact between a CdTe element (to be described later) of the radiation detector 2 and the collimator 3, the radiation detector 2 and the collimator are used. Preferably, the relative position tolerance with respect to 3 can be within ± 0.2 mm. In the present embodiment, since the relative position tolerance is mainly determined by the processing accuracy of the boundary 123a, the achievement is easy.

  Moreover, the 1st support part 120 has the several radiation fin 125a in the side surface 125 used as the outer side of the radiation detector stand 10, as shown to Fig.3C (a). The heat radiating fins 125 a have a plate shape that digs into the side surface 125 and extends in the short direction of the first support 12 at regular intervals.

  Furthermore, a plurality of screw holes 126 a corresponding to the plurality of through holes 160 of the fixing plate 16 are formed on the end surface 126 where the fixing plate 16 is provided. A plurality of screw holes (not shown) corresponding to the plurality of through holes 170 of the fixing plate 17 are formed on the end surface 127 where the fixing plate 17 is provided. The screws 161 pass through the through holes 160 and are respectively inserted into the screw holes 126a and tightened, whereby the fixing plate 16 and the first support body 12 are fixed. Also, the fixing plate 17 and the first support body 12 are fixed by screwing the screws 171 through the through holes 170 and inserting the screws 171 into the screw holes.

(Details of the second support 13)
As shown in FIG. 3B, the second support 13 is formed in a plate shape as viewed from the side surface 135, and the length in the longitudinal direction is the same as the length in the longitudinal direction of the support plate 11. In addition, the second support 13 is provided on the second support part 130 in which a plurality of second grooves 134 are formed on the side surface 132 and the second support part 130. And a second collimator support 131 as a second adjuster support that is thinner than the thickness. The second support 13 is formed by the same material and processing method as the first support 12.

  The second support portion 130 includes a leg 130a, a leg 130b, and a leg 130c having a convex shape that are in contact with the support plate 11 below the plane of FIG. 3B. A recess is formed between the leg 130a and the leg 130b and between the leg 130b and the leg 130c. In other words, heat exchange between the atmosphere at a high temperature inside the radiation detector stand 10 and the outside atmosphere is performed through the recess due to the formation of the recess. Moreover, the flow of heat from the support plate 11 to the second support 13 can be suppressed by forming the recess.

  The radiation detector 2 is inserted into each of the second grooves 134, and the radiation detector 2 is connected to the second groove 134 by an elastic member, which will be described later, provided between the recessed portion 134 a of the second groove 134 and the radiation detector 2. The radiation detector 2 is pressed against the flat surface 134 b of the groove 134 and is fixed to the radiation detector stand 10 with high accuracy.

  On the upper part of the second groove 134, a contact surface 132 a is formed at the boundary between the side surface 132 and the second groove 134. When the radiation detector 2 is inserted into the radiation detector stand 10, the contact surface 132 a is in contact with the contact surface 122 a and the bottom portion 27 a, and the stopper 26 b formed at the other end of the radiation detector 2. It contacts the bottom 27b. By this contact, the positioning of the radiation detector 2 and the radiation detector stand 10 in the height direction is performed with high accuracy.

  In the second collimator support 131, a guide 131a and a guide 131b for guiding the installation of the collimator 3 are formed on the side surface 133 on the side where the radiation detector 2 is arranged. The guide portion 131a and the guide portion 131b have a shape corresponding to the guided portion formed in the collimator 3 (in this embodiment, a semi-cylindrical shape), and are formed to extend from the upper surface 138 to the boundary 133a.

  The boundary 133a is a step formed at the boundary between the second support part 130 and the second collimator support part 131. When the collimator 3 is installed, the bottom part 300 of the collimator 3 comes into contact. When the bottom part 300 contacts the boundary 133a, the distance d between the incident surface 210 of the radiation detector 2 and the bottom part 300 of the collimator 3 is maintained at a preset distance. That is, the collimator 3 is arranged in the front-rear direction of the radiation detector 2 (the radiation detector stand) by the guide portions 121a and 121b of the first support 12 and the guide portions 131a and 131b of the second support 13. 10 (longitudinal direction of 10), and the distance d between the incident surface 210 and the bottom 300 of the radiation detector 2 (the distance in the height direction of the radiation detector stand 10) is determined by the boundary 123a and the boundary 133a. Can be accurately determined.

  Moreover, the 2nd support part 130 has the several radiation fin 135a in the side surface 135 used as the outer side of the radiation detector stand 10, as shown to FIG. 3C (b). The heat radiating fins 135a are formed by digging the side surfaces 135 and have a plate shape extending in the short direction of the second support 13 at regular intervals.

  In addition, a plurality of screw holes 136 a corresponding to the plurality of through holes 160 of the fixing plate 16 are formed on the end surface 136 where the fixing plate 16 is provided. A plurality of screw holes (not shown) corresponding to the plurality of through holes 170 of the fixing plate 17 are formed on the end surface 137 where the fixing plate 17 is provided. The screws 161 pass through the through holes 160 and are respectively inserted into the screw holes 136a and tightened, whereby the fixing plate 16 and the second support body 13 are fixed. Also, the fixing plate 17 and the second support body 13 are fixed by screwing the screws 171 through the through holes 170 and inserting the screws 171 into the screw holes, respectively.

(Details of collimator 3)
FIG. 5 is a top view of the collimator according to the embodiment. As shown in FIG. 5, the collimator 3 has a rectangular shape in a top view according to the shape of the radiation detector stand 10. Each of the plurality of radiation detectors 2 detects radiation through the opening 34 of the collimator 3. As an example, the plurality of openings 34 of the collimator 3 are formed in a substantially square shape. The opening diameters of the plurality of openings 34 are formed such that one side is 1.2 mm, and the openings 34 are arranged in a matrix at a pitch of 1.4 mm. Therefore, the thickness of the wall 35 that separates one opening of the collimator 3 from the other opening adjacent to the one opening is 0.2 mm.

  The collimator 3 is formed using a metal material that does not transmit the radiation 4 from the viewpoint of preventing crosstalk. This metal material is, for example, lead and tungsten.

  When the fixing plate 16 and the fixing plate 17 are fixed to the first support body 12 and the second support body 13, the end 30 on the fixing plate 16 side of the collimator 3 is fixed to face the inside of the radiation detector stand 10. The end portion 31 on the fixed plate 17 side is inserted into a concave portion 172 formed on the side surface of the fixed plate 17 facing the inside of the radiation detector stand 10.

  A guided portion 320a corresponding to the guide portion 121a is formed on the side portion 32 on the first support 12 side of the collimator 3, and a guided portion 320b corresponding to the guide portion 121b is formed.

  On the other hand, a guided portion 330a corresponding to the guide portion 131a is formed on the side portion 33 on the second support 13 side, and a guided portion 330b corresponding to the guide portion 131b is formed. Since the collimator 3 is formed using a metal material that does not transmit the radiation 4, the collimator 3 is heavy and difficult to accurately position. However, the collimator 3 is in contact with the bottom 300 of the collimator 3, the boundary 123 a and the boundary 133 a, and guided. Accurate positioning can be easily performed by guiding the installation of the collimator 3 by the part 121a, the guide part 121b, the guide part 131a, and the guide part 131b.

  Here, after the collimator 3 is installed, the panel 18 is installed on the upper surface 128 of the first support 12 and the upper surface 138 of the second support 13. The central portion of the panel 18 is formed using, for example, a material that is lighter in weight than the peripheral portion. This material is, for example, a resin material or a light metal material such as aluminum. Further, the peripheral portion of the panel 18 is formed by using a material that is heavier than the central portion and strong, for example. This material is, for example, stainless steel. The panel 18 is fixed to the first support 12 and the second support 13 using screws. This panel 18 also serves as a presser for the collimator 3.

(Outline of configuration of radiation detector 2)
FIG. 6 is a perspective view of the radiation detector according to the exemplary embodiment. In FIG. 6, the radiation 4 propagates through the collimator 3 from the upper side to the lower side of the paper surface. That is, the radiation 4 propagates along the direction from the CdTe element 21 of the radiation detector 2 toward the card holder 24 and the card holder 25 and reaches the radiation detector 2. The radiation detector 2 receives the radiation 4 on the incident surface 210 of the CdTe element 21 (that is, the surface facing upward in FIG. 6). The radiation detector 2 has a card shape, for example.

  Specifically, referring to FIG. 6, the radiation detector 2 includes a thin substrate 20 having a thickness equal to or less than the thickness of the wall 35 separating the plurality of openings 34 of the collimator 3, and the collimator 3. A pair of CdTe elements 21 capable of detecting the radiation 4 through the plurality of openings 34, and a card holder 24 and a card holder 25 that support the substrate 20 by sandwiching the substrate 20 between adjacent portions of the pair of CdTe elements 21, Is generally configured.

  For example, as shown in FIG. 6, four pairs of CdTe elements 21 are fixed to the substrate 20 at positions where the substrate 20 is sandwiched. That is, the pair of CdTe elements 21 in each set is fixed to a symmetric position on one surface and the other surface of the substrate 20 with the substrate 20 as a symmetry plane. Further, for example, the thickness of the substrate 20 is approximately the same as the thickness of the wall 35 separating the openings 34 of the collimator, and is 0.3 mm or less as an example.

  The substrate 20 is supported by being sandwiched between the card holder 24 and the card holder 25. The card holder 24 and the card holder 25 are formed to have the same shape, and the protruding portion 250 of the card holder 25 fits into the grooved hole 241 of the card holder 25 and the grooved hole of the card holder 25 has. The protrusions 240 of the card holder 24 are fitted to (not shown) to support the substrate 20. The card holder 24 and the card holder 25 are formed using a resin material as an example, but may be formed using a metal material. When the card holder 24 and the card holder 25 are formed using a metal material, the heat generated in the radiation detector 2 can be effectively transferred to the first support 12 and the second support 13.

  The elastic member mounting portion 28 presses and fixes the radiation detector 2 against the radiation detector stand 10 when the radiation detector 2 is inserted into the radiation detector stand 10 that supports the plurality of radiation detectors 2. This is the portion where the elastic member 28a is provided. In the radiation detector 2, the card edge portion 29 is inserted into the connector 152, and the terminal of the connector 152 and the pattern 29 a of the card edge portion 29 are electrically connected, so that the electrical circuit is electrically connected to the electronic component mounting portion 14 a. Connected to. Further, a convex protrusion is formed on the upper portion of the elastic member 28a (the upper portion of the paper surface of FIG. 6), and this protrusion is the recess portion 124a of the first groove 124 and the recess portion 134a of the second groove 134. It is possible to perform accurate insertion of the radiation detector 2 with respect to the radiation detector stand 10 by fitting into the radiation detector 2.

  In addition, the radiation detector 2 has a wiring pattern (not shown) of each CdTe element 21 and a plurality of substrate terminals 200 electrically connected to the opposite side of the substrate 20 of the pair of CdTe elements 21. An electrode pattern on the surface of the element opposite to the substrate 20 of the CdTe element 21 and a wiring pattern on the CdTe element 21 side of the flexible substrate 22 are further provided.

  The flexible substrate 22 is provided on both the one CdTe element 21 side of the pair of CdTe elements 21 and the other CdTe element 21 side (for example, each of the CdTe element 21 side of one of the four pairs of CdTe elements 21). And a flexible substrate 22 is provided on each of the other CdTe element 21 side). One end of each of the plurality of wiring patterns of the flexible substrate 22 is electrically connected to the substrate terminal 200 at each of the card holder 24 and the joint portions 22a as the plurality of flexible lead coupling portions of the card holder 25. Specifically, one end of the wiring pattern of the flexible substrate 22 is connected to the element surface of the CdTe element 21 with a conductive adhesive or the like. The other end of the wiring pattern is electrically connected to the terminal surface of the substrate terminal 200 using a conductive adhesive or the like.

Similarly, the flexible substrate 22 having a wiring pattern connected to the electrode pattern of the other CdTe element 21 is provided so as to cover the surface of the other CdTe element 21. Although the CdTe element 21 is used to detect the radiation 4, the semiconductor element is not limited to the CdTe element 21 as long as radiation such as γ rays can be detected. For example, a compound semiconductor element such as a CdZnTe (CZT) element or an HgI ₂ element can be used as the semiconductor element. Below, the assembly method of the radiation detection apparatus 1 is demonstrated easily.

(Outline of assembly method of radiation detector 1)
First, the support plate 11 on which the substrate 14 is mounted is prepared. Subsequently, the first support 12 and the second support 13 are arranged at predetermined positions on the support plate 11, and the first support 12 and the second support are attached to the support plate 11 by a plurality of screws 114. 13 is fixed.

  Next, the plurality of radiation detectors 2 are inserted into the connector 152. This insertion is performed so that the protrusion of the elastic member 28a of the radiation detector 2 fits into the indented portion 124a of the first groove 124 and the indented portion 134a of the second groove 134. The bottom 27a of the stopper 26a is in contact with the contact surface 122a of the first support 12, and the bottom 27b of the stopper 26b is in contact with the contact surface 132a of the second support 13.

  Next, after a predetermined number of radiation detectors 2 are inserted into the connector 152, the fixing plate 16 and the fixing plate 17 are attached to the first support 12 and the second support 13 using a plurality of screws 161 and screws 171. To fix.

  Next, the guided part 320a, the guided part 320b, the guided part 330a, and the guided part 330b of the collimator 3 corresponding to the guiding part 121a, the guiding part 121b, the guiding part 131a, and the guiding part 131b of the radiation detector stand 10, respectively. Insert. Subsequently, until the bottom portion 300 of the collimator 3 contacts the boundary 123a of the first support 12 and the boundary 133a of the second support 13, the guide portion 121a, the guide portion 121b, the guide portion 131a, and the guide portion 131b The collimator 3 is inserted into the radiation detector stand 10 while being guided.

  Next, the panel 18 is fixed on the upper surface 128 of the first support 12 and the upper surface 138 of the second support 13 using screws, and the assembly of the radiation detection apparatus 1 is completed.

(Effect of embodiment)
According to the radiation detector stand 10 according to the embodiment of the present invention, a semi-cylindrical guide portion is formed on the first support body 12 and the second support body 13, and the collimator 3 corresponds to the guide portion. Since the guided portion having the shape is formed, the collimator 3 can be installed on the radiation detector stand 10 with high positional accuracy. Moreover, since the radiation detector stand 10 which concerns on embodiment forms the boundary 123a in the 1st support body 12 and forms the boundary 133a in the 2nd support body 13, especially the collimator 3 and the radiation detector 2 are formed. The distance d from the incident surface 210 can be achieved with high accuracy. Furthermore, since the collimator 3 can be installed with high positional accuracy, the detection accuracy of the radiation 4 of the radiation detection device 1 is improved.

  In the above embodiment, the adjuster has been described by taking the porous parallel collimator as an example. However, the adjuster is not limited to this, and may have a function of adjusting the traveling direction of the radiation 4. For example, a pinhole collimator or the like It is also possible to use.

  In the above embodiment, each guide portion formed on the first support body 12 and the second support body 13 is formed corresponding to the guided portion formed on the side surface of the collimator 3. However, the present invention is not limited to this, and a guide portion having a shape for guiding the end portion 30 and the end portion 31 in the short direction of the collimator 3 without forming the guided portion in the collimator 3 may be used.

  Furthermore, in the above embodiment, the guide portions formed on the first support body 12 and the second support body 13 have a convex shape, and the guided portion formed on the collimator 3 has a concave shape. However, the present invention is not limited to this, and the guide portion may be concave and the guided portion may be convex, and can be set freely.

  While the embodiments of the present invention have been described above, the embodiments described above do not limit the invention according to the claims. In addition, it should be noted that not all the combinations of features described in the embodiments are essential to the means for solving the problems of the invention.

DESCRIPTION OF SYMBOLS 1 ... Radiation detection apparatus 2 ... Radiation detector 3 ... Collimator 4 ... Radiation 10 ... Radiation detector stand 11 ... Support plate 12 ... 1st support body 13 ... 2nd support body 14, 20 ... Board | substrate 14a ... Electronic component mounting Parts 16, 17 ... Fixed plate 18 ... Panel 21 ... CdTe element 22 ... Flexible substrate 22a ... Joining part 24, 25 ... Card holder 26a, 26b ... Stopper 27a, 27b ... Bottom 28 ... Elastic member mounting part 28a ... Elastic member 29 ... Card edge part 29a ... Pattern 30, 31 ... End part 32, 33 ... Side part 34 ... Opening 35 ... Wall 110, 140 ... Main surface 111, 141 ... Surface 112, 125a, 135a ... Radiation fin 113, 142a, 142b, 143a , 143b, 147a, 147b, 148a, 148b, 160, 170 ... through holes 114, 161, 171 ... screw 120 ... first Support portions 120a, 120b, 120c, 130a, 130b, 130c ... Leg 121 ... First collimator support portions 121a, 121b ... Guide portions 122, 123, 125, 132, 133, 135 ... Side surfaces 122a, 132a ... Contact surface 123a, 133a ... Boundary 124 ... First grooves 124a, 134a ... Indented portions 124b, 134b ... Flat surfaces 126, 127, 136, 137 ... End surfaces 126a, 136a ... Screw holes 128, 138 ... Upper surface 130 ... Second support 131 ... 2nd collimator support part 131a, 131b ... guide part 134 ... 2nd groove | channel 142, 143, 147, 148 ... convex part 144-146, 149, 150, 151, 162, 172 ... recessed part 152 ... connector 200 ... board terminal 210 ... Incident surface 240 ... Projection 241 ... Grooved hole 250 ... Projection 300 ... Bottom 320a, 320b, 330a, 330b ... guided portion

Claims (7)

A plurality of radiation detectors for detecting radiation are arranged at a predetermined interval corresponding to an interval at which the plurality of radiation detectors are arranged, a plurality of first grooves into which the plurality of radiation detectors are inserted, and the radiation detector A first guide that is provided above the incident surface on which the radiation is incident and guides the installation of an adjuster that adjusts the incident direction of the radiation;
A plurality of second grooves that are arranged at a predetermined interval and that are inserted with the plurality of radiation detectors, and a second groove that is provided above the incident surface and guides the installation of the adjuster. A second support body having a guide portion and disposed in parallel to the first support body,
A radiation detector stand. The first support body has a first support portion in which the first groove is formed, and a thickness smaller than the first support portion on the first support portion. A first regulator support portion formed with a portion,
The second support has a second support part in which the second groove is formed, and a thickness smaller than the second support part on the second support part. A second regulator support portion formed with a portion,
Due to the boundary between the first support part and the first adjuster support part, and the boundary between the second support part and the second adjuster support part, the adjuster and the incident surface of the radiation detector The radiation detector stand according to claim 1, wherein an interval of is set. A support plate on which the first support and the second support are mounted;
Each of the plurality of radiation detectors is connected between the first support and the second support, and a plurality of connection members connecting the electric circuit and each of the plurality of radiation detectors. A radiation detector stand according to claim 2.   The radiation detector stand according to claim 3, wherein the first support and the second support are formed using a metal material.   A plurality of surfaces on the side of the first support opposite to the side on which the first groove is formed and on a side of the second support opposite to the side on which the second groove is formed. The radiation detector stand according to claim 4, which has a heat radiation fin.   The said support plate is formed using a metal material, and has a some radiation fin in the surface on the opposite side to the surface in which a said 1st support body and a said 2nd support body are installed. Radiation detector stand. A plurality of radiation detectors for detecting radiation;
An adjuster that is installed above the radiation detector and adjusts the incident direction of the radiation;
The plurality of radiation detectors are arranged at a predetermined interval corresponding to the interval at which the plurality of radiation detectors are arranged, and the plurality of first grooves into which the plurality of radiation detectors are inserted and the installation of the adjuster are guided. A first support having a first guide portion, a plurality of second grooves that are arranged at a predetermined interval and into which the plurality of radiation detectors are inserted, and the incident surface. A second guide member provided above and guiding the installation of the adjuster, and a second support member disposed in parallel to the first support member; the first support member; Each of the plurality of radiation detectors is connected between a support plate on which the second support is mounted, the first support and the second support, and an electric circuit and the plurality of radiations A plurality of connecting members for connecting each of the detectors, and a radiation detector stand having ,
A radiation detection apparatus comprising:

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