CN101074934B - Gamma counting detector for radiant image - Google Patents
Gamma counting detector for radiant image Download PDFInfo
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- CN101074934B CN101074934B CN2006100119143A CN200610011914A CN101074934B CN 101074934 B CN101074934 B CN 101074934B CN 2006100119143 A CN2006100119143 A CN 2006100119143A CN 200610011914 A CN200610011914 A CN 200610011914A CN 101074934 B CN101074934 B CN 101074934B
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- detector
- circuit board
- radiant image
- photosensitive device
- circuit
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Abstract
A Gamma counting detector used in radiation-imaging consists of detector, circuit board, voltage stabilizer, socket and metal shell. It is featured as forming said detector by photosensitive component and flash crystal, coating reflection layer on flash crystal, using optical glue to coupling-bind said flash crystal with photosensitive component to form a unified body, setting a layer of shielding material on unified body and setting a shielding material layer on metal case containing with said unified body.
Description
Technical field
The invention belongs to the radiation checking technical field, relate to the used Gamma digital detector device of radiation image-forming system.
Background technology
The Gamma ray that isotope sends and the scintillation crystal effect of Gamma digital detector produce fluorescence, photosensitive device is converted into electric signal with fluorescence, electric signal is behind amplification and comparator circuit, the output digital pulse signal, the photon number in set threshold range that the umber of pulse of output just shows detector and received.
Array Gamma digital detector is used to adopt the Gamma radiographic source and is in the radiation image-forming system of counting detection mode, and there is following shortcoming in the digital detector of prior art: 1, circuit is output as simulating signal, is interfered easily; 2, the ray plane of incidence is circular mostly, and the array dead band that circular detector is formed is bigger, directly has influence on imaging; 3, the high pressure and the adjusting inconvenience of threshold up and down; 4, usually need several connectors with being connected of subsequent conditioning circuit, generally include low-tension supply input, high pressure input and signal output, connect comparatively complicated.
Summary of the invention
In order to solve above-mentioned problems of the prior art, the purpose of this invention is to provide a kind of Gamma digital detector that is used for radiant image.It has not only strengthened antijamming capability, and the while can make the imaging dead band of the ray plane of incidence reduce, regulate high pressure and threshold is convenient up and down, and is convenient with the interconnection of subsequent conditioning circuit.
In order to reach the foregoing invention purpose, technical scheme of the present invention realizes as follows:
A kind of Gamma digital detector that is used for radiant image, it comprises the detector parts of being made up of photosensitive device and scintillation crystal, is equipped with the accessory power outlet that is connected with board circuit on the circuit board of the band amplifying return circuit that is connected with detector parts, comparison loop, digit pulse output loop and voltage stabilizer and the end face and contains whole metal shell.Its design feature is that described scintillation crystal surface scribbles the reflection horizon or is equipped with reflective material layer and is coupled bonding with photosensitive device by optical cement.The integral body that is connected of scintillation crystal and photosensitive device is equipped with the lucifuge material layer and is contained by the can of band beam, and the can surface also is equipped with the lucifuge material layer.Photosensitive device adopts photomultiplier or avalanche photodide.
In the said counting detector, the outline of described metal shell is a cuboid.
In the said counting detector, described voltage stabilizer adopts that piezoceramic material makes is input as dc low-voltage, be output as the stabilized voltage supply of adjustable high pressure.
In the said counting detector, described accessory power outlet is multicore one body socket and is connected with circuit board by flexible cord.Circuit board passes the band heat-shrink tube on the can by cable wire hole is connected with the bleeder circuit plate of detector parts front end.
In the said counting detector, described detector parts, circuit board, accessory power outlet are installed on the chassis that places the metal shell bottom.
The present invention is equipped with the environmental suitability that two-layer lucifuge material and one deck beam have increased detector owing to adopted said structure on the scintillation crystal surface.The metal shell outline is that cuboid can make the imaging dead band reduce.Use low noise, the voltage stabilizer that volume is little and adjustable can be built in the detector high-voltage power supply.Use single multi-core socket to be used to import the upper-level threshold of low-tension supply, comparer and following threshold, the output that characterizes the digital pulse signal of photon number, the low pressure conditioning signal of high-voltage power supply, make interconnected and convenient and simple with subsequent conditioning circuit.The present invention has possessed simultaneously by subsequent conditioning circuit and has regulated threshold, high-voltage power supply output up and down because the digital signal of output has strengthened antijamming capability, greatly facilitates system debug.In use very be convenient to the installation and removal of circuit part in the housing, be convenient to the assembling of photosensitive device and scintillation crystal.
The present invention will be further described below in conjunction with the drawings and specific embodiments.
Description of drawings
Fig. 1 is a section of structure of the present invention;
Fig. 2 is that the A-A of Fig. 1 is to section of structure
Fig. 3 is the structural drawing of detector parts of the present invention;
Fig. 4 is that the A-A of Fig. 3 is to section of structure
Fig. 5 is user mode figure of the present invention.
Embodiment
Referring to Fig. 1-Fig. 4, a kind of Gamma digital detector that is used for radiant image, it comprises the detector parts of being made up of photosensitive device 65 and scintillation crystal 66 6, and being equipped with the accessory power outlet 1 that is connected with circuit board 3 circuit on the circuit board 3 of the band amplifying return circuit that is connected with detector parts 6, comparison loop, digit pulse output loop and voltage stabilizer 4 and the end face and containing whole outline is the metal shell 7 of cuboid.Photosensitive device 65 adopts photomultiplier or avalanche photodide, and scintillation crystal 66 surfaces scribble the reflection horizon or are equipped with reflective material layer and are coupled bonding with photosensitive device 65 by optical cement.The integral body that is connected of scintillation crystal 66 and photosensitive device 65 is equipped with the lucifuge material layer and is contained by the can 64 of band beam 62, and can 64 surfaces also are equipped with the lucifuge material layer.Voltage stabilizer 4 adopts that piezoceramic materials make is input as dc low-voltage, be output as the stabilized voltage supply of adjustable high pressure.Accessory power outlet 1 is that multicore one body socket also is connected with circuit board 3 by flexible cord 2, and circuit board 3 passes the band heat-shrink tube on the can 64 by cable 5 wire hole 61 is connected with the bleeder circuit plate 63 of detector parts 6 front ends.Detector parts 6, circuit board 3, accessory power outlet 1 are installed on the chassis 8 that places metal shell 7 bottoms.
Referring to Fig. 5, use when of the present invention, with the screw of the stretching screw 11 that passes detector chassis 8 a plurality of digital detectors are fixed on the detector installing plate 12.Radiographic source camber arrangement relatively between each detector, the formation detector array also can be arranged in parallel several detectors, be formed for the array Gamma digital detector of radiant image, the angle that makes incident Gamma ray and fixed detector is near 0 degree, and minimizing is crosstalked.
Claims (5)
1. Gamma digital detector that is used for radiant image, it comprises the detector parts of being made up of photosensitive device (65) and scintillation crystal (66) (6), the band amplifying return circuit that is connected with detector parts (6), comparison loop, be equipped with the accessory power outlet (1) that is connected with circuit board (3) circuit on the circuit board of digit pulse output loop (3) and voltage stabilizer (4) and the end face and contain whole metal shell (7), it is characterized in that, described scintillation crystal (66) surface scribbles the reflection horizon or is equipped with reflective material layer and is coupled bonding with photosensitive device (65) by optical cement, the integral body that is connected of scintillation crystal (66) and photosensitive device (65) is equipped with the lucifuge material layer and is contained by the can (64) of band beam (62), can (64) surface also is equipped with the lucifuge material layer, and photosensitive device (65) adopts photomultiplier or avalanche photodide.
2. according to the described Gamma digital detector that is used for radiant image of claim 1, it is characterized in that the outline of described metal shell (7) is a cuboid.
3. according to the described Gamma digital detector that is used for radiant image of claim 1, it is characterized in that described voltage stabilizer (4) adopts that piezoceramic material makes is input as dc low-voltage, be output as the stabilized voltage supply of adjustable high pressure.
4. according to the described Gamma digital detector that is used for radiant image of claim 1, it is characterized in that, described accessory power outlet (1) is that multicore one body socket also is connected with circuit board (3) by flexible cord (2), and circuit board (3) passes the band heat-shrink tube on the can (64) by cable (5) wire hole (61) is connected with the bleeder circuit plate (63) of detector parts (6) front end.
5. according to claim 1,2, the 3 or 4 described Gamma digital detectors that are used for radiant image, it is characterized in that described detector parts (6), circuit board (3), accessory power outlet (1) are installed on the chassis (8) that places metal shell (7) bottom.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006100119143A CN101074934B (en) | 2006-05-16 | 2006-05-16 | Gamma counting detector for radiant image |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006100119143A CN101074934B (en) | 2006-05-16 | 2006-05-16 | Gamma counting detector for radiant image |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101074934A CN101074934A (en) | 2007-11-21 |
| CN101074934B true CN101074934B (en) | 2011-10-19 |
Family
ID=38976109
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2006100119143A Expired - Fee Related CN101074934B (en) | 2006-05-16 | 2006-05-16 | Gamma counting detector for radiant image |
Country Status (1)
| Country | Link |
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| CN (1) | CN101074934B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9035261B2 (en) * | 2012-11-30 | 2015-05-19 | Kabushiki Kaisha Toshiba | Reflector having adaptive reflectivity for radiation detection |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5237179A (en) * | 1991-04-12 | 1993-08-17 | General Electric Company | Apparatus for operation of a scintillation detector |
| EP0634672A1 (en) * | 1993-07-12 | 1995-01-18 | General Electric Company | Signal processing in scintillation cameras for nuclear medicine |
| US5543622A (en) * | 1995-08-15 | 1996-08-06 | General Electric Company | Method for determining data normalization factors for image reconstruction |
| US5932878A (en) * | 1997-05-09 | 1999-08-03 | General Electric Company | Reduced dead time radiation detection system |
-
2006
- 2006-05-16 CN CN2006100119143A patent/CN101074934B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5237179A (en) * | 1991-04-12 | 1993-08-17 | General Electric Company | Apparatus for operation of a scintillation detector |
| EP0634672A1 (en) * | 1993-07-12 | 1995-01-18 | General Electric Company | Signal processing in scintillation cameras for nuclear medicine |
| US5543622A (en) * | 1995-08-15 | 1996-08-06 | General Electric Company | Method for determining data normalization factors for image reconstruction |
| US5932878A (en) * | 1997-05-09 | 1999-08-03 | General Electric Company | Reduced dead time radiation detection system |
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| Publication number | Publication date |
|---|---|
| CN101074934A (en) | 2007-11-21 |
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Granted publication date: 20111019 Termination date: 20200516 |
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| CF01 | Termination of patent right due to non-payment of annual fee |