CN109924995B - Double-ended read-out detector unit and double-ended read-out detector - Google Patents
Double-ended read-out detector unit and double-ended read-out detector Download PDFInfo
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- CN109924995B CN109924995B CN201711349132.5A CN201711349132A CN109924995B CN 109924995 B CN109924995 B CN 109924995B CN 201711349132 A CN201711349132 A CN 201711349132A CN 109924995 B CN109924995 B CN 109924995B
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Abstract
The invention is applicable to the field of medical equipment, and discloses a double-end reading detector unit and a double-end reading detector, wherein the double-end reading detector unit comprises a first clamp, a second clamp arranged on one side of the first clamp, a third clamp arranged on the other side of the first clamp, a scintillation crystal arranged on the first clamp, a first photoelectric detection device arranged on the second clamp and coupled with one end of the scintillation crystal, and a second photoelectric detection device arranged on the third clamp and coupled with the other end of the scintillation crystal, the first clamp is provided with a vent pipe and vent holes which are communicated with the vent pipe and the two ends of which face the second clamp and the third clamp respectively, and the vent pipe is positioned at the end part of the first clamp. According to the invention, the vent pipe and the vent hole are arranged on the first clamp, so that the heat dissipation effect of the double-end reading detector unit and the double-end reading detector is effectively improved, and the double-end reading detector has the advantages of compact structure, small volume, simple assembly operation and small assembly difficulty.
Description
Technical Field
The present invention relates to the field of medical devices, in particular to a double-ended read-out detector unit and a double-ended read-out detector having the double-ended read-out detector unit.
Background
In recent years, PET (Positron Emission Tomography, i.e., positron emission tomography) detectors have been developed more and more rapidly, and technologies have also been increasingly mature and have been widely put into the market. Currently, the mainstream PTE detector adopts a single-end readout detector, and the detector unit is formed by coupling and assembling a scintillation crystal and a photoelectric detector positioned at one end of the scintillation crystal. The single-ended readout detector unit has the advantages that the scintillation crystals and the light detectors are easy to couple, the intervals between the scintillation crystals are small, seamless connection can be achieved, the whole system is very compact in structure, but the disadvantage of the single-ended readout detector unit is that DOI (depth of interaction), namely depth of action) information is lacked, imaging quality is low, and improvement of the imaging quality of a PET system is seriously affected.
In order to solve the problems of the single-end readout detector, in the prior art, some researchers propose a scheme for designing the double-end readout detector, which improves the imaging quality of the PET system to a certain extent, but the problems of large volume, poor heat dissipation effect, complicated assembly operation, high assembly difficulty and the like exist in specific application, so that the double-end readout detector is not widely popularized and applied.
Disclosure of Invention
The first object of the present invention is to provide a double-end readout detector unit, which aims to solve the technical problems that the existing double-end readout detector is not widely popularized and applied due to large volume, poor heat dissipation effect, complicated assembly operation and high assembly difficulty.
In order to achieve the above purpose, the invention provides the following scheme: the double-end reading detector unit comprises a first clamp, a second clamp arranged on one side of the first clamp, a third clamp arranged on the other side of the first clamp, a scintillation crystal arranged on the first clamp, a first photoelectric detection device arranged on the second clamp and coupled with one end of the scintillation crystal, and a second photoelectric detection device arranged on the third clamp and coupled with the other end of the scintillation crystal, wherein the first clamp is provided with a vent pipe and vent holes, two ends of the vent pipe are respectively oriented to the second clamp and the third clamp, and the vent pipe is positioned at the end part of the first clamp.
Optionally, the first anchor clamps include anchor clamps body, two respectively protruding locate anchor clamps body both ends pedestal and two respectively follow anchor clamps body both sides edge reverse outwards extension's epitaxial plate, the scintillation crystal install in on the anchor clamps body, the breather pipe with the air vent is all located on the anchor clamps body, the second anchor clamps with two the pedestal is connected, the third anchor clamps with two the epitaxial plate is connected.
Optionally, the fixture body is provided with a mounting hole between the two epitaxial plates, the scintillation crystal is embedded and mounted in the mounting hole, and the vent hole is positioned between the mounting hole and the connecting plate.
Optionally, a plurality of mounting holes are formed, and the mounting holes are sequentially and alternately distributed between two end parts of the clamp body along a linear track; and/or the number of the groups of groups,
the fixture comprises a mounting hole, a plurality of vent holes, two vent cavities, two fixture bodies and a plurality of clamping plates, wherein the vent holes are arranged in a plurality of, the vent holes are divided into two rows and are respectively arranged on two sides of the mounting hole, the two vent holes are arranged in the two vent pipes, and the two vent cavities are respectively communicated with the two vent pipes and the two vent holes.
Optionally, the base is provided with a first connecting hole for connecting with the second clamp; and/or the number of the groups of groups,
the epitaxial plate is provided with a second connecting hole for connecting with the third clamp; and/or the number of the groups of groups,
the fixture comprises a fixture body, and is characterized in that at least one end part of the fixture body is further convexly provided with a connecting block, and a third connecting hole used for being connected with an end cover is formed in the connecting block.
Optionally, the first photoelectric detection device includes first detection device body and locates the first winding displacement of first detection device body one end, be equipped with on the second anchor clamps and supply first draw-in groove that first detection device body embedding was fixed a position and be used for dodging the first groove of dodging of first winding displacement.
Optionally, the plurality of first clamping grooves are arranged, and the plurality of first clamping grooves are sequentially and alternately distributed between two end parts of the second clamp along a linear track;
the second clamp is also provided with at least two fourth connecting holes for connecting with the first clamp, each fourth connecting hole is divided into two rows and is distributed and is respectively close to two ends of the second clamp, and the first clamping groove is positioned between the two rows of fourth connecting holes; and/or the number of the groups of groups,
the first avoiding groove is a U-shaped groove which is arranged on one side of the second clamp and penetrates through two ends of the second clamp.
Optionally, the second photoelectric detection device includes the second detection device body and locates the second winding displacement of second detection device body one end, be equipped with on the third anchor clamps and supply the second draw-in groove that the embedding of second detection device body was fixed a position and be used for dodging the groove is dodged to the second of second winding displacement.
Optionally, a plurality of second clamping grooves are provided, and the plurality of second clamping grooves are sequentially and alternately distributed between two end parts of the third clamp along a linear track;
the third clamp is also provided with two rows of fifth connecting holes which are respectively positioned at two sides of the second clamping groove and used for being connected with the first clamp; and/or the number of the groups of groups,
the second avoiding groove is a rectangular groove which is arranged at the end part of the third clamp and communicated with the second clamping groove.
A second object of the present invention is to provide a dual-end readout detector comprising an end cap and a plurality of dual-end readout detector units as described above, a plurality of the dual-end readout detector units being circumferentially distributed around and each of the plurality of dual-end readout detector units being connected to the end cap at one end.
According to the double-end readout detector unit and the double-end readout detector, the scintillation crystal is clamped through the first clamp, the first photoelectric detection device is clamped through the second clamp, the second photoelectric detection device is clamped through the third clamp, and the second clamp and the third clamp are respectively arranged on two sides of the first clamp so that the first photoelectric detection device and the second photoelectric detection device are respectively located at two ends of the scintillation crystal, so that the double-end readout function of the double-end readout detector unit and the double-end readout detector is realized, and further imaging quality is improved. Meanwhile, the vent pipe and the vent hole are arranged on the first clamp, the vent pipe is arranged at the end part of the first clamp, the vent hole is communicated with the vent pipe, and the two ends face the second clamp and the third clamp respectively, so that the heat dissipation effect of the double-end reading detector unit and the double-end reading detector is greatly improved through the ventilation characteristics of the vent pipe and the vent hole. In addition, the arrangement of the vent pipe and the vent hole does not influence the installation of the second clamp, the third clamp and the first clamp, so the double-end reading detector unit and the double-end reading detector have the advantages of compact structure, small volume, good heat dissipation effect, simple assembly operation and small assembly difficulty compared with the prior art.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic perspective assembly view of a dual end readout detector unit provided in an embodiment of the present invention;
FIG. 2 is a schematic perspective view of a first fixture according to an embodiment of the present invention;
FIG. 3 is a top plan view of a first clamp provided by an embodiment of the present invention;
FIG. 4 is a schematic diagram illustrating an assembly of a second fixture and a first photodetector according to an embodiment of the present invention;
FIG. 5 is an exploded view of a second fixture and a first photodetector device provided in an embodiment of the invention;
FIG. 6 is a schematic diagram illustrating an assembly of a third fixture and a second photodetector according to an embodiment of the present invention;
FIG. 7 is an exploded view of a third fixture and a second photodetector according to an embodiment of the present invention;
fig. 8 is a schematic perspective assembly view of a dual-end readout detector according to an embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present invention are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.
It will also be understood that when an element is referred to as being "mounted" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.
Furthermore, the description of "first," "second," etc. in this disclosure is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.
As shown in fig. 1 to 8, the dual-end readout detector unit 100 provided by the embodiment of the invention includes a first fixture 1, a second fixture 2 installed on one side of the first fixture 1, a third fixture 3 installed on the other side of the first fixture 1, a scintillation crystal 4 installed on the first fixture 1, a first photodetector device 5 installed on the second fixture 2 and coupled with one end of the scintillation crystal 4, and a second photodetector device 6 installed on the third fixture 3 and coupled with the other end of the scintillation crystal 4, wherein the first fixture 1 is provided with a ventilation pipe 111 and a ventilation hole 112 communicating with the ventilation pipe 111 and having both ends respectively facing the second fixture 2 and the third fixture 3, and the ventilation pipe 111 is located at the end of the first fixture 1.
In the embodiment of the invention, the scintillation crystal 4 is mounted on the first clamp 1, the first photoelectric detection device 5 is mounted on one side of the first clamp 1 through the second clamp 2 and is coupled with one end of the scintillation crystal 4, and the first photoelectric detection device 5 is mounted on the other side of the first clamp 1 through the second clamp 2 and is coupled with the other end of the scintillation crystal 4, so that the mounting and fixing of the scintillation crystal 4, the first photoelectric detection device 5 and the second photoelectric detection device 6 are realized, the double-end reading function of the double-end reading detector unit 100 and the double-end reading detector is realized, and the imaging quality is improved. Meanwhile, in the embodiment of the invention, the vent pipe 111 and the vent hole 112 are arranged on the first clamp 1, the vent pipe 111 is arranged at the end part of the first clamp 1, the vent hole 112 is communicated with the vent pipe 111, and the two ends face the second clamp 2 and the third clamp 3 respectively, so that air flow can pass through the scintillation crystal 4 and blow air to the first photoelectric detection device 5 and the second photoelectric detection device 6 at the two sides, and the heat dissipation effect of the double-end readout detector unit 100 and the double-end readout detector is effectively improved. In addition, since the arrangement of the vent pipe 111 and the vent hole 112 does not affect the installation of the second clamp 2, the third clamp 3 and the first clamp 1, the double-end readout detector unit 100 of the embodiment of the invention has the characteristics of compact structure, small volume, good heat dissipation effect, simple assembly operation and small assembly difficulty.
Preferably, referring to fig. 1 to 3, the first fixture 1 includes a fixture body 11, two seats 12 respectively protruding from two ends of the fixture body 11, and two extension plates 13 respectively extending outwards from two opposite side edges of the fixture body 11, the scintillation crystal 4 is mounted on the fixture body 11, the ventilation pipe 111 and the ventilation hole 112 are both disposed on the fixture body 11, the second fixture 2 is connected with the two seats 12, and the third fixture 3 is connected with the two extension plates 13. The arrangement of the holder body 11 is used on the one hand for realizing the assembly of the scintillation crystal 4 with the first holder 1 and on the other hand for realizing the arrangement of the heat dissipation structure. The seat body 12 is mainly used for realizing the assembly of the second clamp 2 and the first clamp 1. The arrangement of the epitaxial plate 13 is mainly used for realizing the assembly of the third clamp 3 and the first clamp 1. Here, since the base 12 on the first fixture 1 for connecting with the second fixture 2 is located at two ends of the fixture body 11, and the extension boards 13 for connecting with the third fixture 3 are located at two side edges of the fixture body 11, the structure on the first fixture 1 for connecting with the second fixture 2, the structure for connecting with the third fixture 3 and the structure for radiating heat are staggered from each other, so that the structural compactness of the double-end readout detector unit 100 can be effectively improved on the premise of fully ensuring the heat radiation performance of the double-end readout detector unit 100.
Specifically, the jig body 11 has first and second end portions disposed in opposite directions, and first and second side portions disposed in opposite directions, both ends of the first side portion extending to the first and second end portions, respectively, and both ends of the second side portion extending to the first and second end portions, respectively. The two bases 12 are respectively protruded from the bottom ends of the first and second ends, and the two extension plates 13 are respectively extended reversely and outwardly from the top ends of the first and second sides.
Preferably, referring to fig. 1-3, the fixture body 11 is provided with a mounting hole 113 between the two extension plates 13, the scintillation crystal 4 is embedded in the mounting hole 113, and the vent hole 112 is located between the mounting hole 113 and the connection plate. Specifically, the mounting hole 113 and the vent hole 112 are both located between the two connection plates, and the vent hole 112 is located between the mounting hole 113 and the connection plate.
Preferably, the plurality of mounting holes 113 are provided, and the plurality of mounting holes 113 are sequentially spaced between both end portions of the jig body 11 along a straight line track. The outer contour shape of the jig body 11 is substantially rectangular. The plurality of mounting holes 113 are sequentially provided at intervals along the length direction of the jig body 11. Here, the number of the mounting holes 113 is plural, so that the first clamp 1 can be used for clamping plural scintillation crystals 4, thereby facilitating the simultaneous readout of plural groups of detection data; of course, in a specific application, the number of the mounting holes 113 does not have to be plural, and for example, only one or two may be provided.
As a preferred embodiment of the present embodiment, the mounting holes 113 are provided with four; of course, the number of mounting holes 113 is not limited thereto in a specific application.
Preferably, both the scintillator crystal 4 and the mounting hole 113 are rectangular in shape.
Preferably, the plurality of vent holes 112 are provided, and the plurality of vent holes 112 are divided into two rows and are respectively arranged at two sides of the mounting hole 113, two vent pipes 111 are provided, and two vent chambers respectively communicating the two vent pipes 111 with the two rows of vent holes 112, that is, one vent chamber communicates one vent pipe 111 with one row of vent holes 112, and the other vent chamber communicates the other vent pipe 111 with the other row of vent holes 112, are further provided in the fixture body 11. The two ventilation pipes 111, the two ventilation cavities and the two rows of ventilation holes 112 can form two heat dissipation channels, the airflow direction principles of the two heat dissipation channels are the same, and here, the airflow direction principles of the heat dissipation channels are described by taking one heat dissipation channel as an example: the air flow enters the ventilation cavity communicated with the ventilation pipe 111 from the inside, then flows to the ventilation hole 112 communicated with the ventilation cavity, and finally flows to the second clamp 2 and the third clamp 3 from the two ends of the ventilation hole 112 respectively.
Preferably, the vent hole 112 is a rectangular hole, where the vent hole 112 is relatively long and narrow, which is beneficial to ensuring the ventilation amount of the vent hole 112 and ensuring that the width dimension of the clamp body 11 is relatively small, thereby being beneficial to reducing the size of the clamp body 11.
Preferably, the second clamp 2 is connected to the base 12 through a first fastener, preferably a screw, which is convenient to assemble and disassemble and is convenient for overhauling and maintenance at a later time.
Preferably, referring to fig. 1 to 5, the base 12 is provided with a first coupling hole 121 for coupling with the second clamp 2. The second clamp 2 is provided with a fourth connection hole 23 for connection with the first clamp 1. In the specific assembly process, the first fastener penetrates through and connects the first connecting hole 121 and the fourth connecting hole 23, so that the first clamp 1 and the second clamp 2 are connected.
Preferably, the third clamp 3 is connected to the base body 12 through a second fastener, and the second fastener is preferably a screw, so that the second fastener is convenient to assemble and disassemble and is convenient for overhauling and maintenance in the future.
Preferably, referring to fig. 1 to 3 and fig. 6 and 7, the epitaxial plate 13 is provided with a second connection hole 131 for connection with the third jig 3. The third clamp 3 is provided with a fifth coupling hole 33 for coupling with the first clamp 1. In the specific assembly, the second fastening member is inserted through the second connecting hole 131 and the fifth connecting hole 33, so that the first clamp 1 is connected with the third clamp 3.
Preferably, referring to fig. 1 to 3 and 8, at least one end portion of the clamp body 11 is further provided with a connection block 14, and the connection block 14 is provided with a third connection hole 141 for connection with the end cap 200. The connecting block 14 is connected to the end cap 200 by a third fastener, preferably a screw, which is convenient to disassemble and assemble and is convenient for maintenance.
Preferably, two breather pipes 111 are provided on both sides of the connection block 14, respectively.
Preferably, referring to fig. 1, 4 and 5, the first photoelectric detection device 5 includes a first detection device body 51 and a first flat cable 52 disposed at one end of the first detection device body 51, and the second fixture 2 is provided with a first clamping groove 21 for embedding and positioning the first detection device body 51 and a first avoiding groove 22 for avoiding the first flat cable 52. In the specific installation, the first detection device body 51 is embedded and positioned in the first clamping groove 21, and the first flat cable 52 passes out of the second clamp 2 from the first avoiding groove 22.
Preferably, a plurality of first clamping grooves 21 are provided, and the plurality of first clamping grooves 21 are sequentially and alternately distributed between two ends of the second clamp 2 along a linear track. The outer contour shape of the second clamp 2 is substantially rectangular. The plurality of first clamping grooves 21 are sequentially arranged at intervals along the length direction of the second clamp 2. Here, the number of the first clamping grooves 21 is multiple, so that the second clamp 2 can be used for clamping multiple first photoelectric detection devices 5, thereby being beneficial to realizing simultaneous readout of multiple groups of detection data; of course, in a specific application, the number of the first clamping grooves 21 does not have to be plural, and for example, only one or two of the first clamping grooves may be provided.
As a preferred embodiment of the present embodiment, the first clamping groove 21 is provided with four; of course, the number of the first card slots 21 is not limited thereto in a specific application.
Preferably, the second clamp 2 is provided with at least two fourth connecting holes 23 for connecting with the first clamp 1, each fourth connecting hole 23 is divided into two rows and is respectively arranged near two ends of the second clamp 2, and the first clamping groove 21 is located between the two rows of fourth connecting holes 23, that is, each fourth connecting hole 23 is distributed on two sides of the first clamping groove 21 along the length direction of the second clamp 2. Here, through carrying out the optimal design to the distribution position of fourth connecting hole 23 and first draw-in groove 21 on the second anchor clamps 2, so, both do benefit to the connection that realizes second anchor clamps 2 and first anchor clamps 1, do benefit to the clamping of first photoelectric detection device 5 on second anchor clamps 2 again, its compact structure.
As a preferred embodiment of the present embodiment, four fourth connecting holes 23 are provided, and the four fourth connecting holes 23 are divided into two rows respectively provided near both ends of the second jig 2. Of course, the number of the fourth connection holes 23 is not limited thereto in a specific application.
Preferably, the first avoiding groove 22 is a U-shaped groove provided at one side of the second clamp 2 and penetrating through both ends of the second clamp 2. The first escape groove 22 is provided on a side of the second clamp 2 facing away from the first clamp 1. Here, the first escape groove 22 is provided as a groove having an opening on one side in the circumferential direction, which is convenient to manufacture and to wear the first flat cable 52.
Preferably, referring to fig. 1, 6 and 7, the second photoelectric detection device 6 includes a second detection device body 61 and a second flat cable 62 disposed at one end of the second detection device body 61, and the third fixture 3 is provided with a second clamping groove 31 for embedding and positioning the second detection device body 61 and a second avoiding groove 32 for avoiding the second flat cable 62. In the specific installation, the second detection device body 61 is embedded and positioned in the second clamping groove 31, and the second flat cable 62 passes out of the third clamp 3 from the second avoiding groove 32.
Preferably, a plurality of second clamping grooves 31 are provided, and the plurality of second clamping grooves 31 are sequentially and alternately distributed between two ends of the third clamp 3 along a linear track. The outer contour shape of the third clamp 3 is substantially rectangular. The plurality of second clamping grooves 31 are sequentially arranged at intervals along the length direction of the third clamp 3. Here, the number of the second clamping grooves 31 is plural, so that the third clamp 3 can be used for clamping the plurality of second photoelectric detection devices 6, thereby being beneficial to realizing simultaneous readout of a plurality of groups of detection data; of course, in a specific application, the number of the second clamping grooves 31 does not have to be plural, for example, only one or two of the second clamping grooves may be provided.
As a preferred embodiment of the present embodiment, the second clamping grooves 31 are provided with four; of course, the number of the second clamping grooves 31 is not limited to this in the specific application.
Preferably, the third clamp 3 is provided with the fifth connecting holes 33 for connecting with the first clamp 1, which are distributed in two rows on both sides of the second clamping groove 31. The two rows of fifth connecting holes 33 are distributed on two sides of the third clamping groove along the width direction of the third clamp 3. Here, through carrying out the optimal design to the distribution position of fifth connecting hole 33 and second draw-in groove 31 on the third anchor clamps 3, so, both do benefit to the connection that realizes third anchor clamps 3 and first anchor clamps 1, do benefit to the clamping of second photoelectric detection device 6 on third anchor clamps 3 again, its compact structure.
Preferably, the second avoidance groove 32 is a rectangular groove provided at an end of the third clamp 3 and communicating with the second clamping groove 31. Here, the second avoidance groove 32 is provided as a circumferentially closed groove, and has a good positioning and protecting effect on the second flat cable 62.
Preferably, the number of mounting holes 113, first clamping grooves 21, second clamping grooves 31, scintillation crystal 4, first photodetector 5, and second photodetector 6 are all the same.
Preferably, the scintillation crystal 4 is lutetium yttrium silicate crystal (LYSO). The lutetium yttrium silicate scintillation crystal 4 has the characteristics of high light output, rapid luminescence attenuation, multiple effective atomic numbers, stable physicochemical properties, no deliquescence, high gamma ray detection efficiency and the like. Of course, in particular applications, the scintillation crystal 4 can be made of other materials, such as Lutetium Silicate (LSO), sodium iodide (NaI), lanthanum bromide (LaBr) 3 ) Etc.
Preferably, the first photodetector 5 and the second photodetector 6 are of the same construction.
Preferably, the first photodetector 5 and the second photodetector 6 are both silicon photomultiplier (Silicon photomultiplier, siPM for short), which has the characteristics of high gain, high sensitivity, low bias voltage, insensitivity to magnetic field, compact structure, and the like. Of course, in specific applications, the first photodetector 5 and the second photodetector 6 may be replaced by other devices, such as a multi-pixel photon counter (Multi Pixel Photo Counter, abbreviated as MPPC) or a photomultiplier tube (Photomultiplier Tube, abbreviated as PMT) or an avalanche photodiode (Avalanche Photo Diode, abbreviated as APD).
As a preferred implementation of this embodiment, the dual-end readout detector unit 100 is assembled in the following manner:
mounting and positioning the scintillation crystal 4 on the first clamp 1;
the first photoelectric detection devices 5 are installed and positioned on the second clamp 2, and the second clamp 2 provided with the first photoelectric detection devices 5 is installed and fixed on one side of the first clamp 1 through screws, so that one end of each scintillation crystal 4 is fully coupled with each first photoelectric detection device 5, and the installation and fixation of one end SiPM light detector device are realized;
the second photoelectric detection devices 6 are installed and positioned on the third clamp 3, and the third clamp 3 provided with the second photoelectric detection devices 6 is installed and fixed on the other side of the first clamp 1 through screws, so that the other ends of the scintillation crystals 4 are respectively and fully coupled with the second photoelectric detection devices 6, and further the installation and fixation of the SiPM light detector devices at the other ends are realized, and thus, the installation and fixation of the double-end readout detector unit 100 are completed, the assembly operation is simple and convenient, and the positioning is accurate.
Further, referring to fig. 8, there is further provided a dual-end readout detector according to an embodiment of the present invention, which includes an end cap 200 and a plurality of dual-end readout detector units 100 as described above, wherein the plurality of dual-end readout detector units 100 are circumferentially distributed around, and one end of each of the plurality of dual-end readout detector units 100 is connected to the end cap 200. The end cap 200 is used to lock and fix together a plurality of double-ended read-out detector units 100, thereby facilitating solving the problem of a double-ended read-out detector structure that is not compact enough. The double-end readout detector provided by the embodiment adopts the double-end readout detector unit 100, so that the double-end readout detector has the characteristics of compact structure, small volume, good heat dissipation effect, simple assembly operation and small assembly difficulty; in addition, since it is double-ended read-out detection data, it also has the characteristic of high imaging quality.
Preferably, the end cap 200 is circumferentially provided with a plurality of mounting grooves 201 at intervals for respectively clamping and positioning the connecting blocks 14, and the bottom of each mounting groove 201 is provided with a sixth connecting hole. The number of mounting slots 201 on the end cap 200 is the same as the number of double-ended sensing detector units 100, and the connection blocks 14 of each double-ended sensing detector unit 100 are inserted into each mounting slot 201 of the end cap 200 and are locked by fourth fasteners, respectively. The fourth fastener is preferably a screw.
Preferably, third avoidance grooves 202 for avoiding the ventilation pipe 111 are further formed in the end cover 200 at intervals along the circumferential direction, and each installation groove 201 and each third avoidance groove 202 are alternately formed along the circumferential direction, so that the whole structure of the manufactured double-end readout detector is compact.
Preferably, twelve double-end readout detector units 100 are provided, twelve double-end readout detector units 100 are sequentially circumferentially connected and circumferentially distributed, and twelve double-end readout detector units 100 are centrally and symmetrically distributed; of course, the number of double-ended read-out detector units 100 is not limited to this in a particular application.
The embodiment of the invention provides a double-end readout detector, which is based on how an SiPM photoelectric detector and LYSO crystals are fixed in a system, and provides a mechanical structure design scheme of the detector for double-end readout, wherein the mechanical structure is compact in structure, can be effectively positioned, can realize ventilation and heat dissipation.
In the PET system, the structural design of double-end reading in the embodiment is adopted, so that the PET system has the characteristic of high imaging quality; by adopting the positioning structure in the implementation, the specific position of each scintillation crystal 4 can be effectively positioned, and physical deviation can not be brought to system imaging; by adopting the ventilation and heat dissipation structure in the embodiment, heat generated by the system can be effectively taken away, so that the system can quickly reach heat balance.
The foregoing description is only of the preferred embodiments of the present invention and is not intended to limit the scope of the invention, and all equivalent structural changes made by the description of the present invention and the accompanying drawings or direct/indirect application in other related technical fields are included in the scope of the invention.
Claims (8)
1. The double-end reading detector unit is characterized by comprising a first clamp, a second clamp arranged on one side of the first clamp, a third clamp arranged on the other side of the first clamp, a scintillation crystal arranged on the first clamp, a first photoelectric detection device arranged on the second clamp and coupled with one end of the scintillation crystal, and a second photoelectric detection device arranged on the third clamp and coupled with the other end of the scintillation crystal, wherein the first clamp is provided with a vent pipe and vent holes which are communicated with the vent pipe and have two ends respectively oriented to the second clamp and the third clamp, and the vent pipe is positioned at the end part of the first clamp;
the first clamp comprises a clamp body, two base bodies respectively protruding from two ends of the clamp body and two epitaxial plates respectively extending outwards reversely from two side edges of the clamp body, the scintillation crystal is arranged on the clamp body, the vent pipe and the vent hole are both arranged on the clamp body, the second clamp is connected with the two base bodies, and the third clamp is connected with the two epitaxial plates;
the fixture body is provided with a mounting hole positioned between the two epitaxial plates, the scintillation crystal is embedded into the mounting hole, and the vent hole is positioned between the mounting hole and the epitaxial plates.
2. The double-ended readout detector unit according to claim 1, wherein a plurality of the mounting holes are provided, and the plurality of the mounting holes are sequentially distributed between both end portions of the jig body at intervals along a straight line trajectory; and/or the number of the groups of groups,
the fixture comprises a mounting hole, a plurality of vent holes, two vent cavities, two fixture bodies and a plurality of clamping plates, wherein the vent holes are arranged in a plurality of, the vent holes are divided into two rows and are respectively arranged on two sides of the mounting hole, the two vent holes are arranged in the two vent pipes, and the two vent cavities are respectively communicated with the two vent pipes and the two vent holes.
3. The dual end readout detector unit of claim 1, wherein the housing is provided with a first attachment hole for attachment to the second clamp; and/or the number of the groups of groups,
the epitaxial plate is provided with a second connecting hole for connecting with the third clamp; and/or the number of the groups of groups,
the fixture comprises a fixture body, and is characterized in that at least one end part of the fixture body is further convexly provided with a connecting block, and a third connecting hole used for being connected with an end cover is formed in the connecting block.
4. A dual end readout detector unit according to any one of claims 1 to 3, wherein the first photoelectric detection device comprises a first detection device body and a first flat cable provided at one end of the first detection device body, and the second clamp is provided with a first clamping groove for embedding and positioning the first detection device body and a first avoiding groove for avoiding the first flat cable.
5. The dual end readout detector unit of claim 4, wherein a plurality of the first clamping grooves are provided, and the plurality of the first clamping grooves are sequentially and alternately distributed between two end parts of the second clamp along a linear track;
the second clamp is also provided with at least two fourth connecting holes for connecting with the first clamp, each fourth connecting hole is divided into two rows and is distributed and is respectively close to two ends of the second clamp, and the first clamping groove is positioned between the two rows of fourth connecting holes; and/or the number of the groups of groups,
the first avoiding groove is a U-shaped groove which is arranged on one side of the second clamp and penetrates through two ends of the second clamp.
6. A dual end readout detector unit according to any one of claims 1 to 3, wherein the second photoelectric detection device comprises a second detection device body and a second flat cable arranged at one end of the second detection device body, and the third clamp is provided with a second clamping groove for embedding and positioning the second detection device body and a second avoiding groove for avoiding the second flat cable.
7. The dual end readout detector unit of claim 6, wherein a plurality of the second clamping grooves are provided, and the plurality of the second clamping grooves are sequentially and alternately distributed between two end parts of the third clamp along a linear track;
the third clamp is also provided with two rows of fifth connecting holes which are respectively positioned at two sides of the second clamping groove and used for being connected with the first clamp; and/or the number of the groups of groups,
the second avoiding groove is a rectangular groove which is arranged at the end part of the third clamp and communicated with the second clamping groove.
8. A dual end readout detector comprising an end cap and a plurality of dual end readout detector units according to any one of claims 1 to 7, a plurality of said dual end readout detector units being circumferentially distributed around and each of said dual end readout detector units being connected at one end to said end cap.
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| CN111624645B (en) * | 2020-06-11 | 2021-08-13 | 北京卫星环境工程研究所 | Double-end reading crystal detector and rapid generation method of depth-of-action scale thereof |
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| GB1564385A (en) * | 1977-03-24 | 1980-04-10 | Emi Ltd | Arrangements for detecting ionising radiation |
| JP4303603B2 (en) * | 2004-01-13 | 2009-07-29 | 株式会社日立製作所 | Nuclear medicine diagnostic device and its detector unit |
| US7470913B1 (en) * | 2006-10-19 | 2008-12-30 | Canberra Industries, Inc. | High efficiency and high homogeneity large-area gas-filled radiation detector |
| JP6209532B2 (en) * | 2011-12-27 | 2017-10-04 | コーニンクレッカ フィリップス エヌ ヴェＫｏｎｉｎｋｌｉｊｋｅ Ｐｈｉｌｉｐｓ Ｎ．Ｖ． | Attaching tiles for PET detectors |
| CN203062650U (en) * | 2013-01-15 | 2013-07-17 | 上海联影医疗科技有限公司 | Scintillation crystal component element assembly clamp |
| WO2014180487A1 (en) * | 2013-05-07 | 2014-11-13 | Cern - European Organization For Nuclear Research | A detector configuration with semiconductor photomultiplier strips and differential readout |
| CN103800023B (en) * | 2014-02-19 | 2015-12-09 | 中国科学院高能物理研究所 | A kind of two flatbed imaging device based on continuous crystal |
| CN204520736U (en) * | 2015-03-19 | 2015-08-05 | 明峰医疗系统股份有限公司 | Based on the Novel PET detector framework of SiPM |
| CN105769230B (en) * | 2016-02-03 | 2017-10-27 | 上海联影医疗科技有限公司 | Detector module and medical imaging apparatus |
| CN106772532B (en) * | 2017-01-04 | 2019-09-10 | 东软医疗系统股份有限公司 | Photodetector encapsulating structure and its packaging method based on water cooling |
| CN107398844B (en) * | 2017-06-26 | 2019-05-28 | 东软医疗系统股份有限公司 | A kind of detector manufacture fixture and scintillator localization method |
| CN108363092B (en) * | 2017-11-30 | 2020-02-07 | 江苏赛诺格兰医疗科技有限公司 | Detector based on liquid cooling plate structure and positron emission tomography system |
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