CN105444989A - Light guide test device - Google Patents
Light guide test device Download PDFInfo
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- CN105444989A CN105444989A CN201410431309.6A CN201410431309A CN105444989A CN 105444989 A CN105444989 A CN 105444989A CN 201410431309 A CN201410431309 A CN 201410431309A CN 105444989 A CN105444989 A CN 105444989A
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- crystal
- photomultiplier
- light guide
- box
- radioactive source
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Abstract
The invention provides a light guide test device comprising a radioactive source box, a crystal holder, a photomultiplier tube box and a bottom plate which are connected sequentially from top to bottom. The radioactive source box comprises a radioactive source, a radioactive source box cover and a radioactive source box body. The crystal holder comprises a crystal holder body, a crystal holder cover, a crystal holder fixing plate, a crystal module and a to-be-detected light guide. The crystal holder body is fixed above the to-be-detected light guide through the crystal holder fixing plate. The to-be-detected light guide is fixed above the photomultiplier tube box through a plurality of spring clips. The photomultiplier tube box is fixed on the bottom plate. The photomultiplier tube box is internally equipped with a plurality of photomultiplier tubes. The photomultiplier tube box is externally equipped with a connector board which is provided with high-voltage power input ends and data output ends. The high-voltage power input ends are connected with the power input ends of the photomultiplier tubes. The signal output ends of the photomultiplier tubes are connected with a detector test platform through the data output ends.
Description
Technical field
The present invention relates to detector technology field, be specifically related to a kind of light guide test device.
Background technology
Positron emission tomography device (PET, PositronEmissionTomography) be after x-ray tomography imaging and mr imaging technique, computerized tomography technology is applied to the clinical examination image technology that the field of nuclear medicine is more advanced, be the only New video technology that can show biomolecule metabolism, acceptor and neurotransmitter activity on live body at present, be now widely used in the aspects such as the Diagnosis and differential diaggnosis of various diseases, state of an illness judgement, therapeutic evaluation, organ function research and new drug development.
PET scanner is made up of detector, front-end electronics, examination couch, computing machine and other slave parts, and detector is the kernel component of PET, is PET " eyes ".Position resolution, the technical indicator such as temporal resolution and sensitivity of a PET scanner depend primarily on the detector that it uses, and namely PET scanner finally provides the quality of image and practical assessment first to depend on detector.
Detector mainly contains crystal array and electrooptical device composition, and crystal array is mainly used in absorbing γ photon, produces fluorescence, and electrooptical device Main Function absorbs fluorescence, and through opto-electronic conversion, and amplification produces pulsed current signal.
Mainly contain two kinds of detectors at present, one is common photomultiplier tube detectors, and one is silicon photomultiplier (SIPM) detector.A common photomultiplier tube detectors generally adds 4 common photomultipliers by crystal array and forms, and utilizes photoconduction to carry out light splitting, and the light that the crystal bar of diverse location arrives 4 photomultipliers is different, is determined the position of crystal bar by ratio.And affect five parameters such as the thickness mainly containing photoconduction of photoconduction performance, outer gap depth, outer clearance distance, interior clearance distance, interior gap depth, if five parameters carry out combination will numerous scheme, need to process a large amount of photoconductions, experimental period is also very long, even cannot search out the photoconduction of suitable dimension.
Summary of the invention
In order to overcome traditional common photomultiplier tube detectors length experimental period and inefficient problem, the invention provides a kind of light guide test device.
In order to solve the problems of the technologies described above, the present invention adopts following technical scheme:
The invention provides a kind of light guide test device, comprising: the radiation source capsule connected successively from top to bottom, crystal holder, photomultiplier box and base plate;
Radiation source capsule comprises: radioactive source, radioactive source lid and radioactive source box body; Radioactive source direction is placed in described radioactive source box body down; Radioactive source lid is positioned at radioactive source cassette upper end; The bottom of described radioactive source box body is provided with through hole;
Crystal holder comprises: crystal box body, crystal lid, crystal holder fixed head, crystal module and photoconduction to be measured; Crystal box body is fixed on above photoconduction to be measured by crystal holder fixed head; Crystal module and photoconduction to be measured are positioned at crystal holder, and crystal lid is positioned at crystal cassette upper end; Crystal lid and crystal box body are lucifuge material;
Photoconduction to be measured is fixed on above photomultiplier box by multiple spring clip; Photomultiplier box is fixed on base plate; Many photomultipliers are provided with in photomultiplier box;
Photomultiplier box outside is provided with connector plate, and connector plate is provided with high-voltage power supply input end and data output end; High-voltage power supply input end is connected with the power input of photomultiplier; The signal output part of photomultiplier is connected with detector test platform by data output end.
Further, crystal module comprises: crystal array, tool locating plate and tool locating block; Crystal array comprises crystal frock and crystal bar; Crystal frock is provided with multiple grid, and crystal bar is positioned among grid; Tool locating plate is fixed on photomultiplier lid; Crystal frock is connected with tool locating plate by tool locating block.
Further, photoconduction periphery to be measured is surrounded by aluminium foil; Light guide surface to be measured is provided with many gaps; Reflection horizon is filled with in gap.
Further, crystal array comprises at least one crystal bar.
Further, radioactive source is gamma-rays radioactive source.
Further, sealing strip is provided with between photomultiplier box and base plate.
Further, photomultiplier is arranged on photomultiplier assembly, is provided with the fixed head for fixing photomultiplier assembly in photomultiplier box; Photomultiplier assembly is arranged on fixed head by screw.
Further, photomultiplier box top peripheral is provided with O-ring seal; The material of described photomultiplier box is lucifuge material.
Further, the material of described spring clip is spring steel.
Further, the material of source capsule is radiated for shielding material.
The invention has the beneficial effects as follows:
Light guide test device provided by the invention is by changing the relative position of crystal and photoconduction, be used for the reflection horizon of the thickness and clearance distance and crystal array of probing into photoconduction to the impact of crystal scatter diagram, Rule Summary, significantly can reduce the number of times of photoconduction processing, accelerate experiment progress, determine the size of photoconduction, have devised the detector scheme of function admirable; The present invention adopts crystal to cut, and utilizes photoconduction to carry out light splitting, and technique is simple, can polish to crystal, polishing, the process such as annealing, crystal optics performance is good, and crystal array consistance is high, is conducive to the resolution improving PET scanner.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the light guide test device described in the embodiment of the present invention;
Fig. 2 is the partial sectional view of the light guide test device described in the embodiment of the present invention;
Fig. 3 is the structural representation of the crystal holder described in the embodiment of the present invention;
Fig. 4 is the crystal array structural representation described in the embodiment of the present invention;
Fig. 5 is the structural representation of the photoconduction to be measured described in the embodiment of the present invention.
Description of reference numerals:
1, source capsule is radiated; 2, crystal holder; 3, photomultiplier box; 4, base plate; 5, radioactive source; 6, radioactive source lid; 7, radioactive source box body; 8, crystal box body; 9, crystal lid; 10, crystal holder fixed head; 11, crystal module; 12, photoconduction to be measured; 13, photomultiplier; 14, connector plate; 15, high-voltage power supply input end; 16, data output end; 17, crystal bar; 18, crystal frock; 19, tool locating plate; 20, tool locating block; 21, aluminium foil; 22, gap; 23, photomultiplier assembly; 24, spring clip; 25, fixed head; 26, O-ring seal; 27, outer gap; 28, interior gap; 29, crystal array.
Embodiment
For making the technical problem to be solved in the present invention, technical scheme and advantage clearly, be described in detail below in conjunction with the accompanying drawings and the specific embodiments.
See Fig. 1, the invention provides a kind of light guide test device, comprising: the radiation source capsule 1 connected successively from top to bottom, crystal holder 2, photomultiplier box 3 and base plate 4;
Radiation source capsule 1 comprises: radioactive source 5, radioactive source lid 6 and radioactive source box body 7; Radioactive source 5 direction is placed in radioactive source box body 7 down; Radioactive source lid 6 is positioned at radioactive source box body 7 upper end; Further, radioactive source 5 is gamma-rays radioactive source; The material of radiation source capsule 1 is shielding material, and the light that can effectively avoid radioactive source 5 to launch injects to device outside, causes radiation to human body or other materials; The bottom of described radioactive source box body 7 is provided with through hole, and the light launched for radioactive source 5 passes through to crystal holder 2.
Crystal holder 2 comprises: crystal box body 8, crystal lid 9, crystal holder fixed head 10, crystal module 11 and photoconduction to be measured 12; Crystal box body 8 is fixed on above photoconduction 12 to be measured by crystal holder fixed head 10; Crystal module 11 and photoconduction to be measured 12 are positioned at crystal holder 2, and crystal lid 9 is positioned at crystal box body 8 upper end; Crystal lid 9 and crystal box body 8 are lucifuge material, and can prevent extraneous light from entering crystal holder 2, the gamma-rays that radioactive source 5 can be made to launch again enters crystal holder 2.
See Fig. 3 and Fig. 4, crystal module 11 comprises: crystal array 29, tool locating plate 19 and tool locating block 20; Crystal array 29 comprises: crystal frock 18 and crystal bar 17; The present invention adopts crystal to cut, and technique is simple, can polish to crystal, polishing, the process such as annealing, crystal optics performance is good, and crystal array consistance is high, is conducive to the resolution improving PET scanner.
Crystal frock 18 is provided with multiple grid, and crystal bar 17 is positioned among grid; Tool locating plate 19 is fixed on photomultiplier lid 3; Crystal frock 18 is connected with tool locating plate 19 by tool locating block 20; Further, crystal array 29 comprises at least one crystal bar 17.Can by the tool locating block 20 of the different size of design, change the relative position of crystal frock 18 and photoconduction 12 to be measured, and then the relative position changed between crystal bar 17 and the gap 22 of photoconduction to be measured 12, probe into the impact of change on scatter diagram of photoconduction clearance distance, reduce the number of times of processing photoconduction.
See Fig. 5, photoconduction 12 periphery to be measured is surrounded by aluminium foil 21; Photoconduction 12 surface to be measured is provided with many gaps 22; Reflection horizon is filled with in gap 22; The surface of photoconduction 12 to be measured is established many outer gaps 27 and many interior gaps 28 in embodiments of the invention, the distance between gap 22 and the degree of depth can free settings; Reflection horizon is filled with in gap 22.
Continue see Fig. 1, photoconduction 12 to be measured is fixed on above photomultiplier box 3 by multiple spring clip 24; Further, the material of spring clip 24 is spring steel, and spring steel has excellent metallurgical quality and surface quality; Photomultiplier box 3 is fixed on base plate 4; Many photomultipliers 13 are provided with in photomultiplier box 3; Further, sealing strip is provided with between photomultiplier box 3 and base plate 4; Photomultiplier box 3 top peripheral is provided with O-ring seal 26, and the material of photomultiplier box 3 is lucifuge material.
Photomultiplier box 3 outside is provided with connector plate 14, and connector plate 14 is provided with high-voltage power supply input end 15 and data output end 16; High-voltage power supply input end 15 is connected with the power input of photomultiplier 13; The signal output part of photomultiplier 13 is connected with detector test platform by data output end 16.
See Fig. 2, photomultiplier 13 is arranged on photomultiplier assembly 23, is provided with the fixed head 25 for fixing photomultiplier assembly 23 in photomultiplier box 3; Photomultiplier assembly 23 is arranged on fixed head 25 by screw.
See Fig. 1 and Fig. 4, the ray that radioactive source 5 is launched is through crystal array 29, crystal array 29 absorbs the photon in ray, produce fluorescence, fluorescence carries out light-splitting processing through photoconduction 12 to be measured, then carries out opto-electronic conversion through photomultiplier 13, and amplify generation pulsed current signal, the signal output part of photomultiplier 13 is connected with detector test platform by data output end 16, and detector test platform, by analyzing current signal, draws scatter diagram.Affect the thickness mainly containing photoconduction of photoconduction performance, outer gap depth, outer clearance distance, interior clearance distance, five parameters such as interior gap depth, if five parameters carry out combination will numerous scheme, need to process a large amount of photoconductions, and the present invention is by the tool locating block 20 of the different size of design, change the relative position of crystal array 29 and photoconduction 12 to be measured, and then the relative position changed between crystal bar 17 and the gap 22 of photoconduction to be measured 12, multi-group data can be recorded by processing one piece of photoconduction 12 to be measured, and then significantly reduce the number of times of processing photoconduction 12 to be measured, obtain the optimal parameter of photoconduction 12 to be measured, accelerate experiment progress.
The above is the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the prerequisite not departing from principle of the present invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (10)
1. a light guide test device, is characterized in that, comprising: the radiation source capsule connected successively from top to bottom, crystal holder, photomultiplier box and base plate;
Described radiation source capsule comprises: radioactive source, radioactive source lid and radioactive source box body; Described radioactive source direction is placed in described radioactive source box body down; Described radioactive source lid is positioned at described radioactive source cassette upper end; The bottom of described radioactive source box body is provided with through hole;
Described crystal holder comprises: crystal box body, crystal lid, crystal holder fixed head, crystal module and photoconduction to be measured; Described crystal box body is fixed on above described photoconduction to be measured by described crystal holder fixed head; Described crystal module and photoconduction to be measured are positioned at described crystal holder, and described crystal lid is positioned at described crystal cassette upper end; Described crystal lid and crystal box body are lucifuge material;
Described photoconduction to be measured is fixed on above described photomultiplier box by multiple spring clip; Described photomultiplier box is fixed on described base plate; Many photomultipliers are provided with in described photomultiplier box;
Described photomultiplier box outside is provided with connector plate, and described connector plate is provided with high-voltage power supply input end and data output end; Described high-voltage power supply input end is connected with the power input of described photomultiplier; The signal output part of photomultiplier is connected with detector test platform by described data output end.
2. light guide test device as claimed in claim 1, it is characterized in that, described crystal module comprises: crystal array, tool locating plate and tool locating block; Described crystal array comprises: crystal frock and crystal bar; Described crystal frock is provided with multiple grid, and described crystal bar is positioned among described grid; Described tool locating plate is fixed on described photomultiplier lid; Described crystal frock is connected with described tool locating plate by described tool locating block.
3. light guide test device as claimed in claim 1, it is characterized in that, described photoconduction periphery to be measured is surrounded by aluminium foil; Described light guide surface to be measured is provided with many gaps; Reflection horizon is filled with in described gap.
4. light guide test device as claimed in claim 2, it is characterized in that, described crystal array comprises crystal bar described at least one.
5. light guide test device as claimed in claim 1, it is characterized in that, described radioactive source is gamma-rays radioactive source.
6. light guide test device as claimed in claim 1, is characterized in that, be provided with sealing strip between described photomultiplier box and described base plate.
7. light guide test device as claimed in claim 1, it is characterized in that, described photomultiplier is arranged on photomultiplier assembly, is provided with the fixed head for fixing described photomultiplier assembly in described photomultiplier box; Described photomultiplier assembly is arranged on described fixed head by screw.
8. light guide test device as claimed in claim 1, it is characterized in that, described photomultiplier box top peripheral is provided with O-ring seal; The material of described photomultiplier box is lucifuge material.
9. light guide test device as claimed in claim 1, it is characterized in that, the material of described spring clip is spring steel.
10. light guide test device as claimed in claim 1, is characterized in that, the material of described radiation source capsule is shielding material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410431309.6A CN105444989A (en) | 2014-08-28 | 2014-08-28 | Light guide test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410431309.6A CN105444989A (en) | 2014-08-28 | 2014-08-28 | Light guide test device |
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|---|---|
| CN105444989A true CN105444989A (en) | 2016-03-30 |
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| CN201410431309.6A Pending CN105444989A (en) | 2014-08-28 | 2014-08-28 | Light guide test device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108983282A (en) * | 2018-09-13 | 2018-12-11 | 江苏赛诺格兰医疗科技有限公司 | A kind of silicon photomultiplier test platform |
| CN109407140A (en) * | 2018-10-23 | 2019-03-01 | 江苏赛诺格兰医疗科技有限公司 | A kind of multichannel photomultiplier tube levelling device that pet detector uses |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108983282A (en) * | 2018-09-13 | 2018-12-11 | 江苏赛诺格兰医疗科技有限公司 | A kind of silicon photomultiplier test platform |
| CN108983282B (en) * | 2018-09-13 | 2020-01-10 | 江苏赛诺格兰医疗科技有限公司 | Silicon photomultiplier test platform |
| CN109407140A (en) * | 2018-10-23 | 2019-03-01 | 江苏赛诺格兰医疗科技有限公司 | A kind of multichannel photomultiplier tube levelling device that pet detector uses |
| CN109407140B (en) * | 2018-10-23 | 2020-06-09 | 江苏赛诺格兰医疗科技有限公司 | Multi-path photomultiplier leveling device for PET detector |
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