CN2919276Y - Gamma count detector for radiation imaging - Google Patents
Gamma count detector for radiation imaging Download PDFInfo
- Publication number
- CN2919276Y CN2919276Y CNU2006200229721U CN200620022972U CN2919276Y CN 2919276 Y CN2919276 Y CN 2919276Y CN U2006200229721 U CNU2006200229721 U CN U2006200229721U CN 200620022972 U CN200620022972 U CN 200620022972U CN 2919276 Y CN2919276 Y CN 2919276Y
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- detector
- circuit board
- photosensitive device
- circuit
- radiant image
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- Expired - Lifetime
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- 238000003384 imaging method Methods 0.000 title abstract description 6
- 230000005855 radiation Effects 0.000 title abstract description 6
- 239000000463 material Substances 0.000 claims abstract description 16
- 239000013078 crystal Substances 0.000 claims abstract description 15
- 239000002184 metal Substances 0.000 claims abstract description 10
- 230000003287 optical effect Effects 0.000 claims abstract description 4
- 239000003381 stabilizer Substances 0.000 claims description 7
- 239000004568 cement Substances 0.000 claims description 3
- 238000001514 detection method Methods 0.000 abstract description 2
- 230000001105 regulatory effect Effects 0.000 abstract description 2
- 230000000052 comparative effect Effects 0.000 abstract 1
- 239000003292 glue Substances 0.000 abstract 1
- 230000003750 conditioning effect Effects 0.000 description 5
- 230000005251 gamma ray Effects 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N ferric oxide Chemical compound O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
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- Measurement Of Radiation (AREA)
Abstract
A Gamma count detector for radiation imaging pertains to the radiation detection art. The utility model comprises a detector component consisting of a photosensitive device and a flashing crystal, a circuit board which is connected with the detector component and includes an amplifying loop, a comparative loop and digital pulse output loop, a voltage regulator and a housing which accommodates the whole, on the end plane of the housing being disposed an output socket which is connected with the circuit in the circuit board. The detector is characterized in that the flashing crystal, the surface of which is coated with a reflection layer or covered by reflective material, is coupled with the photosensitive device by optical glue. The integrated flashing crystal and photosensitive device is covered by the photophobic material and encapsulated in a metal box which is also covered by the photophobic material. Compared with the prior art, the utility model not only is more resistant to interferences, but also has smaller imaging dead arean on the plane of incidence, allowing for convenience in regulating the high voltage and upper/lower thresholds and connected with the followed-up circuit.
Description
Technical field
The utility model belongs to the radiation checking technical field, relates 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 utility model provides 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, the technical solution of the utility model realizes as follows:
The 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.
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 photosensitive device can be photomultiplier or avalanche photodide.
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 utility model 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 utility model 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.
Below in conjunction with the drawings and specific embodiments the utility model is described further.
Description of drawings
Fig. 1 is a section of structure of the present utility model;
Fig. 2 is that the A-A of Fig. 1 is to section of structure
Fig. 3 is the structural drawing of the utility model detector parts;
Fig. 4 is that the A-A of Fig. 3 is to section of structure
Fig. 5 is user mode figure of the present utility model.
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, when using the utility model, use the screw of the stretching screw 11 that passes detector chassis 8 that 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 (6)
1, the 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), and can (64) surface also is equipped with the lucifuge material layer.
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.
According to the described Gamma digital detector that is used for radiant image of claim 1, it is characterized in that 3, 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 photosensitive device (65) can be photomultiplier or avalanche photodide.
According to the described Gamma digital detector that is used for radiant image of claim 5, it is characterized in that 6, 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 |
|---|---|---|---|
| CNU2006200229721U CN2919276Y (en) | 2006-05-16 | 2006-05-16 | Gamma count detector for radiation imaging |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006200229721U CN2919276Y (en) | 2006-05-16 | 2006-05-16 | Gamma count detector for radiation imaging |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2919276Y true CN2919276Y (en) | 2007-07-04 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2006200229721U Expired - Lifetime CN2919276Y (en) | 2006-05-16 | 2006-05-16 | Gamma count detector for radiation imaging |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2919276Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102787360A (en) * | 2011-05-18 | 2012-11-21 | 上海生物医学工程研究中心 | Composite crystal, gamma ray detector and their preparation methods |
| CN103712668A (en) * | 2014-01-22 | 2014-04-09 | 黑龙江省中贝技术有限公司 | Passive nuclear material level detector and detecting method |
-
2006
- 2006-05-16 CN CNU2006200229721U patent/CN2919276Y/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102787360A (en) * | 2011-05-18 | 2012-11-21 | 上海生物医学工程研究中心 | Composite crystal, gamma ray detector and their preparation methods |
| CN103712668A (en) * | 2014-01-22 | 2014-04-09 | 黑龙江省中贝技术有限公司 | Passive nuclear material level detector and detecting method |
| CN103712668B (en) * | 2014-01-22 | 2016-06-08 | 黑龙江省中贝技术有限公司 | Passive type core material level detector and detection method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: TONGFANGWEISHI TECHNOLOGY CO., LTD.; PATENTEE Free format text: FORMER NAME OR ADDRESS: TONGFANG WEISHI TECHNOLOGY CO., LTD., QINGHUA; PATENTEE |
|
| CP01 | Change in the name or title of a patent holder |
Address after: 100083 A, block 2907, Tongfang science and Technology Plaza, Beijing Co-patentee after: Tsinghua University Patentee after: Nuctech Company Limited Address before: 100083 A, block 2907, Tongfang science and Technology Plaza, Beijing Co-patentee before: Tsinghua University Patentee before: Qinghua Tongfang Weishi Tech Co.,Ltd. |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20070704 Effective date of abandoning: 20111019 |