CN105467422A - Photomultiplier debugging device - Google Patents
Photomultiplier debugging device Download PDFInfo
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- CN105467422A CN105467422A CN201410464541.XA CN201410464541A CN105467422A CN 105467422 A CN105467422 A CN 105467422A CN 201410464541 A CN201410464541 A CN 201410464541A CN 105467422 A CN105467422 A CN 105467422A
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- photomultiplier
- crystal
- detector
- radioactive source
- module
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- 239000013078 crystal Substances 0.000 claims abstract description 68
- 230000002285 radioactive effect Effects 0.000 claims abstract description 49
- 238000012360 testing method Methods 0.000 claims abstract description 6
- 239000000463 material Substances 0.000 claims description 12
- 239000002775 capsule Substances 0.000 claims description 7
- 230000005855 radiation Effects 0.000 claims description 7
- 229910000639 Spring steel Inorganic materials 0.000 claims description 4
- 229920002545 silicone oil Polymers 0.000 claims description 4
- 238000005516 engineering process Methods 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000003384 imaging method Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000005693 optoelectronics Effects 0.000 description 2
- 238000002600 positron emission tomography Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000003325 tomography Methods 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical group [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 238000009509 drug development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000004060 metabolic process Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000002858 neurotransmitter agent Substances 0.000 description 1
- 239000002547 new drug Substances 0.000 description 1
- 238000009206 nuclear medicine Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 210000000056 organ Anatomy 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 230000002123 temporal effect Effects 0.000 description 1
- 230000001225 therapeutic effect Effects 0.000 description 1
Abstract
The invention provides a photomultiplier debugging device. The device comprises a detector and a radioactive source below the detector. The detector comprises a detector box, a crystal module disposed in the detector box, a photomultiplier module and a voltage dividing plate. The crystal module is disposed below the photomultiplier module. The voltage dividing plate is disposed above the photomultiplier module. The voltage dividing plate is disposed at the top of the detector box. The crystal module comprises a crystal assembly and a crystal body. The photomultiplier module comprises a photomultiplier assembly and a plurality of photomultiplier bodies. The power supply circuit for the plurality of photomultiplier bodies is a resistor voltage dividing type circuit. The voltage adjusting unit of the power supply circuit is disposed on the voltage dividing plate. The upper surface of the voltage dividing plate is provided with a data output port and a high voltage power supply interface. The power supply circuit is connected to an external power supply through a high voltage power supply interface. The data output ends of the photomultiplier bodies are connected to a detector test platform through the data output port.
Description
Technical field
The present invention relates to detector technology field, be specifically related to a kind of photomultiplier debugging apparatus.
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 is primarily of 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 detector.
A common photomultiplier tube detectors generally adds 4 common photomultipliers by crystal array and forms, utilize ANGER light-dividing principle, the light that the crystal bar of diverse location arrives 4 photomultipliers is different, the position of crystal bar is determined by the ratio of the light of 4 photomultipliers, in order to make the position of crystal bar accurate, detector performance is good, need the enlargement factor of every root photomultiplier the same, consistance is good, but because the error of photomultiplier transit pipe processing technique, very easily cause every root photomultiplier enlargement factor inconsistent, difficulty is brought to the determination of crystal bar position.
Summary of the invention
In order to the problem that the error overcoming photomultiplier transit pipe processing technique easily causes every root photomultiplier enlargement factor inconsistent, the invention provides a kind of photomultiplier debugging apparatus.
In order to solve the problems of the technologies described above, the present invention adopts following technical scheme:
The invention provides a kind of photomultiplier debugging apparatus, comprising: detector and the radiation source capsule be positioned at below detector;
Detector comprises: detector box body, the crystal module being positioned at detector box body, photomultiplier transit tube module and point pressing plate; Wherein, crystal module is positioned at below photomultiplier transit tube module, and a point pressing plate is positioned at above photomultiplier transit tube module; Pressing plate is divided to be arranged on detector box body top;
Crystal module comprises: crystal assembly and crystal bulk; Crystal bulk is installed on crystal assembly; Photomultiplier transit tube module comprises: photomultiplier assembly and multiple photomultiplier transit tube body; Multiple photomultiplier transit tube body is arranged on photomultiplier assembly; The feed circuit of photomultiplier transit tube body are electric resistance partial pressure type circuit; The regulator of feed circuit is positioned on point pressing plate; Pressing plate upper surface is divided to be provided with data-out port and high-voltage power supply interface; Feed circuit are connected with extraneous power supply by high-voltage power supply interface; The data output end of photomultiplier transit tube body is connected with detector test platform by data-out port; Crystal module is fixed by multiple spring clip and photomultiplier assembly;
Radiation source capsule comprises: radioactive source box body, radioactive source and radioactive source box base; Radioactive source is arranged on radioactive source box base; Radioactive source box body is provided with upper cover, is above covered with mounting hole; Detector lower end is placed in mounting hole, and is positioned by location-plate, and radioactive source and crystal module are oppositely arranged.
Further, photomultiplier transit tube module is provided with 4 photomultiplier transit tube bodies.
Further, box joint is provided with between detector box body and point pressing plate.
Further, between spring clip and photomultiplier assembly, be provided with pipe holder, be bolted between spring clip and pipe holder.
Further, the material of spring clip is spring steel material.
Further, crystal assembly comprises crystal base plate and crystal holder, and crystal holder lower end is connected with crystal base plate.
Further, radioactive source is cylindrical radioactive source; Radioactive source box base is provided with circular hole, and radioactive source is installed in circular hole.
Further, radioactive source is nuclide emission source.
Further, silicone oil is provided with between bottom crystal assembly top and photomultiplier assembly.
Further, the material of radioactive source box body and radioactive source box base is shielding material.
The invention has the beneficial effects as follows:
The present invention by arranging regulator on point pressing plate, regulate the voltage of the feed circuit of photomultiplier, make the enlargement factor of 4 photomultipliers consistent, photomultiplier after debugging assembles with crystal array the detector obtained again, crystal bar position is accurate, detector resolution improves, and the picture quality of PET scanner obviously gets a promotion.
Accompanying drawing explanation
Fig. 1 is the partial sectional view of the photomultiplier debugging apparatus described in the embodiment of the present invention;
Fig. 2 is the longitudinal sectional view of the detector described in the embodiment of the present invention;
Fig. 3 is the structural representation of point pressing plate described in the embodiment of the present invention.
Description of reference numerals:
1, detector; 2, source capsule is radiated; 3, detector box body; 4, crystal module; 5, photomultiplier transit tube module; 6, pressing plate is divided; 7, crystal assembly; 8, crystal bulk; 9, photomultiplier assembly; 10, photomultiplier transit tube body; 11, regulator; 12, data-out port; 13, high-voltage power supply interface; 14, spring clip; 15, radioactive source box body; 16, radioactive source; 17, radioactive source box base; 18, upper cover; 19, mounting hole; 20, box joint; 21, pipe holder; 22, crystal base plate; 23, crystal holder; 24, location-plate.
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 and Fig. 2, the invention provides a kind of photomultiplier debugging apparatus, comprising: detector 1 and the radiation source capsule 2 be positioned at below detector 1;
Detector 1 comprises: detector box body 3, the crystal module 4 being positioned at detector box body 3, photomultiplier transit tube module 5 and point pressing plate 6; Wherein, crystal module 4 is positioned at below photomultiplier transit tube module 5, and a point pressing plate 6 is positioned at above photomultiplier transit tube module 5, further, is provided with box joint 20 between detector box body 3 and point pressing plate 6; Pressing plate 6 is divided to be arranged on detector box body 3 top.
Crystal module 4 comprises: crystal assembly 7 and crystal bulk 8; Crystal bulk 8 is installed on crystal assembly 7; Crystal assembly 7 comprises crystal base plate 22 and crystal holder 23; Crystal holder 23 lower end is connected with crystal base plate 22.
Photomultiplier transit tube module 5 comprises: photomultiplier assembly 9 and multiple photomultiplier transit tube body 10; Further, photomultiplier transit tube module 5 is provided with 4 photomultiplier transit tube bodies 10; Multiple photomultiplier transit tube body 10 is arranged on photomultiplier assembly 9; The feed circuit of photomultiplier transit tube body 10 are electric resistance partial pressure type circuit.
See Fig. 2 and Fig. 3, the regulator 11 of feed circuit is positioned on point pressing plate 6; Pressing plate 6 upper surface is divided to be provided with data-out port 12 and high-voltage power supply interface 13; Feed circuit are connected with extraneous power supply by high-voltage power supply interface 13; The data output end of photomultiplier transit tube body 5 is connected with detector test platform by data-out port 12; Be provided with silicone oil between bottom crystal assembly 7 top and photomultiplier assembly 9, silicone oil has remarkable thermotolerance, radiation resistance, electrical insulating property and less surface tension etc.
Continue see Fig. 1 and Fig. 2, crystal module 4 is fixed by multiple spring clip 14 and photomultiplier assembly 9; Further, between spring clip 14 and photomultiplier assembly 9, be provided with pipe holder 21, be bolted between spring clip 14 and pipe holder 21; The material of spring clip 14 is spring steel material, and spring steel has excellent metallurgical quality and surface quality.
Radiation source capsule 2 comprises: radioactive source box body 15, radioactive source 16 and radioactive source box base 17; Radioactive source 16 is arranged on radioactive source box base 17; Radioactive source box body 15 is provided with upper cover 18, and upper cover 18 is provided with mounting hole 19; Detector 1 lower end is placed in mounting hole 19, and is positioned by location-plate 24, and radioactive source 16 and crystal module 4 are oppositely arranged; Radioactive source 16 is cylindrical radioactive source; Radioactive source box base 17 is provided with circular hole, and radioactive source 16 is installed in circular hole; Radioactive source 16 is nuclide emission source, and in embodiments of the invention, radioactive source 16 is gamma-rays radioactive source; The material of radioactive source box body 15 and radioactive source box base 17 is shielding material.
The gamma-rays that radioactive source 16 is launched, bottom detector box body 3, be irradiated to crystal module 4, crystal module 4 produces fluorescence, fluorescence incides on photomultiplier transit tube body 10, photomultiplier transit tube body 10 is through opto-electronic conversion and amp pulse electric current, pulse current is transferred to detector test platform by data-out port 12, test platform demonstrates the peak position of the energy spectrogram of each photomultiplier transit tube body 10, and the enlargement factor of photomultiplier transit tube body 10 is directly proportional to its current gain, so by regulating regulator 11, change the intrinsic standoff ratio of feed circuit, the enlargement factor of photomultiplier can be changed, make each photomultiplier energy spectrogram peak position of detector consistent, complete the debugging of photomultiplier transit tube body 10 enlargement factor consistance, photomultiplier transit tube body 10 after debugging assembles the detector 1 obtained again with crystal array, crystal bar position is accurate, detector 1 resolution improves, the picture quality of PET scanner obviously gets a promotion.
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 photomultiplier debugging apparatus, is characterized in that, comprising: detector and the radiation source capsule be positioned at below described detector;
Described detector comprises: detector box body, the crystal module being positioned at described detector box body, photomultiplier transit tube module and point pressing plate; Wherein, described crystal module is positioned at below described photomultiplier transit tube module, and described point of pressing plate is positioned at above described photomultiplier transit tube module; Described point of pressing plate is arranged on described detector box body top;
Described crystal module comprises: crystal assembly and crystal bulk; Described crystal bulk is installed on described crystal assembly; Described photomultiplier transit tube module comprises: photomultiplier assembly and multiple photomultiplier transit tube body; Described multiple photomultiplier transit tube body is arranged on described photomultiplier assembly; The feed circuit of described photomultiplier transit tube body are electric resistance partial pressure type circuit; The regulator of described feed circuit is positioned on described point pressing plate; Described point of pressing plate upper surface is provided with data-out port and high-voltage power supply interface; Described feed circuit are connected with extraneous power supply by described high-voltage power supply interface; The data output end of described photomultiplier transit tube body is connected with detector test platform by described data-out port; Described crystal module is fixed by multiple spring clip and described photomultiplier assembly;
Described radiation source capsule comprises: radioactive source box body, radioactive source and radioactive source box base; Described radioactive source is arranged on described radioactive source box base; Described radioactive source box body is provided with upper cover, is covered with mounting hole on described; Described detector lower end is placed in described mounting hole, and is positioned by location-plate; Described radioactive source and described crystal module are oppositely arranged.
2. photomultiplier debugging apparatus as claimed in claim 1, it is characterized in that, described photomultiplier transit tube module is provided with 4 described photomultiplier transit tube bodies.
3. photomultiplier debugging apparatus as claimed in claim 1, is characterized in that, be provided with box joint between described detector box body and described point of pressing plate.
4. photomultiplier debugging apparatus as claimed in claim 1, is characterized in that, be provided with pipe holder between described spring clip and described photomultiplier assembly, be bolted between described spring clip and described pipe holder.
5. photomultiplier debugging apparatus as claimed in claim 1, it is characterized in that, the material of described spring clip is spring steel material.
6. photomultiplier debugging apparatus as claimed in claim 1, it is characterized in that, described crystal assembly comprises crystal base plate and crystal holder; Described crystal holder lower end is connected with described crystal base plate.
7. photomultiplier debugging apparatus as claimed in claim 1, it is characterized in that, described radioactive source is cylindrical radioactive source; Described radioactive source box base is provided with circular hole, and described radioactive source is installed in described circular hole.
8. photomultiplier debugging apparatus as claimed in claim 1, it is characterized in that, described radioactive source is nuclide emission source.
9. photomultiplier debugging apparatus as claimed in claim 1, is characterized in that, is provided with silicone oil between bottom described crystal assembly top and described photomultiplier assembly.
10. photomultiplier debugging apparatus as claimed in claim 1, is characterized in that, the material of described radioactive source box body and radioactive source box base is shielding material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410464541.XA CN105467422A (en) | 2014-09-12 | 2014-09-12 | Photomultiplier debugging device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410464541.XA CN105467422A (en) | 2014-09-12 | 2014-09-12 | Photomultiplier debugging device |
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| Publication Number | Publication Date |
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| CN105467422A true CN105467422A (en) | 2016-04-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410464541.XA Pending CN105467422A (en) | 2014-09-12 | 2014-09-12 | Photomultiplier debugging device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106024570A (en) * | 2016-05-13 | 2016-10-12 | 上海联影医疗科技有限公司 | PMT performance regulating method |
| 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 |
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| JPH0493754A (en) * | 1990-08-10 | 1992-03-26 | Hitachi Electron Eng Co Ltd | Sensitivity calibrating method for foreign-matter inspecting apparatus |
| CN101067638A (en) * | 2007-06-07 | 2007-11-07 | 中国科学院紫金山天文台 | Electron-multiplier tube performance testing method and device under vacuum condition |
| CN201096508Y (en) * | 2007-11-02 | 2008-08-06 | 黑龙江省中贝技术有限公司 | Flash detector for material level detection |
| CN101539630A (en) * | 2009-05-08 | 2009-09-23 | 上海生物医学工程研究中心 | Method for detecting and positioning compound high-energy rays |
| CN201449977U (en) * | 2009-06-09 | 2010-05-05 | 西北核技术研究所 | Photomultiplier tube linear parameter debugging device |
| CN202003946U (en) * | 2010-11-26 | 2011-10-05 | 中国船舶重工集团公司第七一八研究所 | Photomultiplier |
| CN103091073A (en) * | 2013-03-01 | 2013-05-08 | 江苏中惠医疗科技股份有限公司 | Multi-channel photomultiplier gain value relative measurement method |
| CN103675886A (en) * | 2012-09-14 | 2014-03-26 | 赛默飞世尔科技有限公司 | Scintillation detector gain control |
-
2014
- 2014-09-12 CN CN201410464541.XA patent/CN105467422A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0493754A (en) * | 1990-08-10 | 1992-03-26 | Hitachi Electron Eng Co Ltd | Sensitivity calibrating method for foreign-matter inspecting apparatus |
| CN101067638A (en) * | 2007-06-07 | 2007-11-07 | 中国科学院紫金山天文台 | Electron-multiplier tube performance testing method and device under vacuum condition |
| CN201096508Y (en) * | 2007-11-02 | 2008-08-06 | 黑龙江省中贝技术有限公司 | Flash detector for material level detection |
| CN101539630A (en) * | 2009-05-08 | 2009-09-23 | 上海生物医学工程研究中心 | Method for detecting and positioning compound high-energy rays |
| CN201449977U (en) * | 2009-06-09 | 2010-05-05 | 西北核技术研究所 | Photomultiplier tube linear parameter debugging device |
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| CN103091073A (en) * | 2013-03-01 | 2013-05-08 | 江苏中惠医疗科技股份有限公司 | Multi-channel photomultiplier gain value relative measurement method |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106024570A (en) * | 2016-05-13 | 2016-10-12 | 上海联影医疗科技有限公司 | PMT performance regulating method |
| CN106024570B (en) * | 2016-05-13 | 2018-02-27 | 上海联影医疗科技有限公司 | A kind of PMT property regulations method |
| 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 |
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Application publication date: 20160406 |