CN102879798A - Scintillation detector for ray imaging device - Google Patents
Scintillation detector for ray imaging device Download PDFInfo
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- CN102879798A CN102879798A CN2012103974209A CN201210397420A CN102879798A CN 102879798 A CN102879798 A CN 102879798A CN 2012103974209 A CN2012103974209 A CN 2012103974209A CN 201210397420 A CN201210397420 A CN 201210397420A CN 102879798 A CN102879798 A CN 102879798A
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Abstract
The invention discloses a scintillation detector for a ray imaging device. The scintillation detector comprises a scintillation array, a light guide element and a prober, wherein the scintillation array is used for receiving radioactive rays and emitting flare light; the light guide element is provided with a receiving face, an output face and a scintillation unit connected with the receiving face; the scintillation unit is used for receiving and transmitting the flare light emitted by the scintillation; the prober is connected with the output face of the light guide element, and is used for receiving the flare light transmitted by the light guide element; the receiving face and the output face of the light guide element have #-shaped kerfs; and a material with reflection capability on the flare light is filled in the kerfs. According to the scintillation detector for the ray imaging device provided by the invention, the transmission efficiency of the edge of the light guide element is improved through the simpler design of the light guide element, so that the position resolution of the prober can be improved, and the machining process is simple.
Description
Technical field
The present invention relates to a kind of detector, more specifically, relate to a kind of scintillation detector for ray imaging device.
Background technology
The radial imaging technology is that radioactive ray (such as X ray and gamma-rays etc.) is as medium, structure or the function information of the detected object that acquisition represents with image format, for corresponding industry provides the various technological means that observed object is diagnosed, detected and monitors, be widely used in the industries such as health care, public safety and high-end manufacturing industry.Detector is the important component part of radiation imaging apparatus.The detector that is used for the detection radioactive ray generally has the types such as gas detector, scintillation detector, semiconductor detector, and wherein the use of scintillation detector is the most extensive.
Scintillation detector generally is comprised of scintillator and photodetector.Scintillator receives ray, has an effect with it and it is converted into passage of scintillation light, and photodetector is converted into the blinking light that receives the electric signal that easily is identified and processes.The common form of scintillator is difform independent scintillator or the scintillation crystal array that is comprised of the scintillator unit.The generation of passage of scintillation light, transmission, detection process are the critical process of realizing the X-ray detection X imaging in the scintillation detector.
In large-scale radiation imaging apparatus, survey dead-time problem for solving, generally can between scintillation crystal array and photomultiplier, add a photocon.As between optical flare unit 1 and photodetector 2, using a fibre-optic light guide element 3 in the scintillation detector of disclosed ray imaging device in the Chinese patent (CN1740819A), as shown in Figure 1, yet because having limited fibre-optic light guide element 3 two ends areas, the manufacturing process of fibre-optic light guide element 3 can not differ greatly, otherwise the printing opacity homogeneity variation of fibre-optic light guide element 3, the edge differs larger with the transmittance of centre, thereby dips resolution.And manufacture craft and the cost of fibre-optic light guide element are larger.
And for example relate to a kind of radiation detector of realizing high-resolution, high image quality and preparation method thereof in the Jap.P. (2007078567A), wherein photocon 3 designs as shown in Figure 2, photocon 3 is with larger area scintillation crystal array 1 and four discrete photodetectors 2 than small size, and the side of photocon 3 is the plane of diclinic degree.Photocon 3 inserts many light reflecting materials with the one side of scintillation crystal array 1 coupling, and is wherein angled with coupling surface near of the side of photocon 3; The another side of photocon 3 is by coupling material and photodetector 2 couplings.The photocon 3 of design is by the reflecting material of side and insertion like this, changed the transmission path of passage of scintillation light 4 in photocon 3, realization is to the differentiation of different crystal bar in the scintillation crystal array 1, and the design of passing through the reflectorized material insertion position, inserting angle and laterally inclined angle, improve the photoconduction edge because passage of scintillation light is transmitted the problem that dispersion brings, improved the position resolution of detector.But because photocon 3 side rake angles and insertion reflecting material angle are subjected to the restriction of the size of scintillation crystal unit 1 and photodetector 2, and photocon 3 need to set up different transmission regions separately from photodetector 2 couplings one end, to be coupled with corresponding photodetector 2, cause thus photocon 3 processing more complicated, and this photocon design is subject to the use of photodetector 2, has reduced the reliability of detection system.
Thus, a kind of simple in structure, the scintillation detector of the ray imaging device of dependable performance becomes this area problem demanding prompt solution.
Summary of the invention
The invention provides a kind of scintillation detector for ray imaging device, comprising:
Scintillator arrays (1), it is used for receiving radioactive ray and sending passage of scintillation light;
Photocon (3) has receiving plane (31) and output face (32), and described receiving plane is connected to described scintillator unit (1), and it is used for receiving and transmitting the passage of scintillation light that this scintillator sends;
Detector (2), it is connected to the output face (32) of described photocon (3), is used for receiving the passage of scintillation light of photocon (2) transmission;
The receiving plane (31) of described photocon (3) has first group of joint-cutting (311), the output face (32) of described photocon (3) has second group of joint-cutting (321), every group of joint-cutting comprises four joint-cuttings, article four, joint-cutting is parallel in twos, and vertical with all the other two joint-cuttings, form " well " word shape; First group of joint-cutting (311) is vertical with receiving plane (31), tangential output face (32) and not running through; Second group of joint-cutting (321) is vertical with output face (32), tangential receiving plane (31) and not running through; And filled the material that passage of scintillation light is had reflection potential in every joint-cutting.
Described photocon (3) is: receiving plane (31) is relative with output face (32) and be the identical rectangle of shape, and peripheric surface is the hexahedron of shape identical rectangular; Perhaps, described photocon (3) is: receiving plane (31) and output face (32) relatively and be the rectangle that shape is identical, area is different, and the peripheric surface identical trapezoidal prism-frustum-shaped hexahedron that is shape.
The degree of depth of first group of joint-cutting (311) and second group of joint-cutting (321) between photocon (3) thickness 1/2nd to 2/3rds between.
Described reflecting material is diffuse-reflective material or specular reflective material.
Described reflecting material and described photocon (3) adopt Air Coupling or optical cement coupling.
The side of described photocon (3) is provided with reflecting material.
The reflecting material of described photocon (3) side and described photocon (3) adopt optical cement coupling.
The area of the receiving plane (31) of described photocon (3) is greater than the area of the output face (32) of described photocon (3).
The side of described photocon (3) is smooth flat.
The present invention is by the particular design of photocon, realized that passage of scintillation light uniform distribution that each scintillator unit in the scintillator arrays is produced is to the purpose of each probe unit of photodetector, make the resulting signal of detector keep preferably the positional information of ray, energy information and event information; And this project organization is simple, easily processes, and is conducive to reduce the cost of detector and machine system.
Description of drawings
Fig. 1 is the structural representation of a kind of scintillation detector of prior art;
Fig. 2 is the structural representation of another scintillation detector of prior art;
Fig. 3 a is the photocon schematic top plan view of the scintillation detector for ray imaging device of the present invention;
Fig. 3 b is the photocon schematic side view of the scintillation detector for ray imaging device of the present invention;
Embodiment
Below in conjunction with accompanying drawing, specify the structure of the scintillation detector for ray imaging device of the present invention.
Referring to Fig. 3 a and Fig. 3 b, it shows a concrete structure of photocon of the present invention.Fig. 3 a is the vertical view of photocon, and Fig. 3 b is the side view of photocon.
Scintillation detector for ray imaging device of the present invention has scintillator arrays 1, photodetector 2 and photocon 3.Scintillator arrays 1 is comprised of a plurality of scintillators unit, is used for receiving radioactive ray and sending passage of scintillation light.Photocon 3 is made of the good material of light conductive performance, such as organic glass, quartz glass, optical glass etc.Photocon 3 is that upper and lower end face (receiving plane 31 and output face 32) is the hexahedron of the identical rectangle of shape (containing square) for identical rectangle (containing square), the peripheric surface of shape.Or the upper and lower end face is that shape is identical, and different rectangle (containing square), the peripheric surfaces of area is the identical trapezoidal prism-frustum-shaped hexahedron of shape.The receiving plane 31 of photocon 3 and scintillator unit 1 coupling, receiving plane 31 links to each other with the light gasing surface of scintillator arrays, and area is identical; The output face 32 of photocon 3 links to each other with the receiving plane of photodetector 2.The receiving plane 31 of photocon 3 has first group of joint-cutting 311, has second group of joint-cutting 321 in the output face 32, and joint-cutting 311, joint-cutting 321 all are comprised of four joint-cuttings, and four joint-cuttings are parallel in twos, and vertical with all the other two joint-cuttings, forms " well " word shape.The joint-cutting 311 of receiving plane 31 is vertical with receiving plane 31, joint-cutting 311 tangential output faces 32, its degree of depth between the thickness of photocon 3 1/2nd to 2/3rds between, and do not run through; The joint-cutting 321 of output face 32 is vertical with output face 32, joint-cutting 321 tangential receiving planes 31, its degree of depth between the thickness of photocon 3 1/2nd to 2/3rds between, and do not run through.The side 33 of photocon 3 is smooth flat.
Joint-cutting 311 on the receiving plane 31 of the photocon 3 of the scintillation detector for ray imaging device of the present invention, the center area of the groined type that the center area of the groined type that forms can form greater than the joint-cutting 321 in the output face 32, the center area of the groined type that also can form less than the joint-cutting 321 in the output face 32.
Other structures of scintillation detector for ray imaging device of the present invention and structure and the connected mode between effect and other structures and the photocon 3 of effect and prior art are all same as the prior art, do not repeat them here.
As preferred implementation of the present invention, shown in Fig. 3 a, receiving plane 31 areas of photocon 3 are identical with passage of scintillation light output face shape and the area of scintillator arrays, " well " word shape that solid line shown in joint-cutting 311(Fig. 3 a on it consists of is the face of joint-cutting 311 1 ends on the receiving plane 31) and output face 32(Fig. 3 a shown in the face of dotted line 321 1 ends) joint-cutting 321 degree of depth be all 1/2nd to 2/3rds of photocon thickness (distance of light receiving surface 31 and light gasing surface 32), four same sizes of the joint-cutting degree of depth of joint-cutting 311, four joint-cutting degree of depth of joint-cutting 321 are same size.All joint-cuttings are filled with light reflecting material.The height of the joint-cutting 311 shown on Fig. 3 b, joint-cutting 321 then is the degree of depth of joint-cutting 311, joint-cutting 321, the degree of depth of the light reflecting material of namely filling in joint-cutting 311, joint-cutting 321.The reflecting material that is filled in joint-cutting 311 and the joint-cutting 321 can be diffuse-reflective material, specular reflective material.
Photocon 3 sides of the scintillation detector for ray imaging device of the present invention can adopt the good Material reinforcement device of photoemissivity to the reflection potential of passage of scintillation light.
After receiving plane 31 incidents of passage of scintillation light by photocon 3 that each scintillator unit in the scintillator arrays 1 produces, reflection through the light reflecting material in the light reflecting material in the groined type joint-cutting 311 that is filled in receiving plane 31 and the groined type joint-cutting 321 that is filled in output face 32, consist of different transmission lines, make passage of scintillation light in different transmission lines, be transferred into output face 32, changed the scope of the transmission path of passage of scintillation light, realized that single photocon consists of a plurality of light transmission paths, make the generation light of different scintillators unit in the scintillator arrays 1 be dispensed to the different probe unit of photodetector, especially at the edge of photocon 3, be 8 zones around the central opening of the groined type that consists of of the joint-cutting 321 of the joint-cutting 311 of receiving plane 31 and output face 32, owing to adopting the scintillation detector for ray imaging device of the present invention, the optical channel that forms between the madial wall of the lateral wall of joint-cutting 311 and photocon 3 in the passage of scintillation light at groined type joint-cutting 311 edges of receiving plane 31 is transmitted, the optical channel that forms between the lateral surface of the joint-cutting 321 of the madial wall of photocon 3 and output face 32 again is transferred into output face 32, thereby the edge that overcomes photocon 3 disperses the defective of the scintillator indistinguishable of the scintillator cell edges brought owing to the passage of scintillation light transmission.
In practical operation, the position resolution scatter diagram of testing in conjunction with detector of the present invention, the result of test is the center of detector 2, be the groined type central opening of groined type joint-cutting 321 of output face 32 of photocon 3 and groined type central opening adjacency four zones result of detection for loose point evenly, substantially uninfluenced, be positioned at 4 each regional result of detection on 4 pin of groined type central opening for having obvious detectable signal, and the result of detection impact is little.The point position is substantially even on the scatter diagram of whole photocon test, and test result is good.
The present invention has following advantage:
Photocon is inner, the selection of offside reflection material, the combination of photocon receiving plane and output face reflecting material insertion position, improve the transfer efficiency at photocon edge by fairly simple photocon design, improve the position resolution of detector, and processing technology is simple.
The above; only for the detailed description of preferred embodiment of the present invention and graphic; feature of the present invention is not limited to this; all scopes of the present invention should be as the criterion with following scope; all embodiment that accords with the spirit variation similar with it of claim protection domain of the present invention; all should be contained in the category of the present invention, anyly be familiar with this skill person in the field of the invention, can think easily and variation or adjust and all can be encompassed in following claim protection domain of the present invention.
Claims (9)
1. scintillation detector that is used for ray imaging device is characterized in that comprising:
Scintillator arrays (1), it is used for receiving radioactive ray and sending passage of scintillation light;
Photocon (3) has receiving plane (31) and output face (32), and described receiving plane is connected to described scintillator unit (1), and it is used for receiving and transmitting the passage of scintillation light that this scintillator sends;
Detector (2), it is connected to the output face (32) of described photocon (3), is used for receiving the passage of scintillation light of photocon (2) transmission;
The receiving plane (31) of described photocon (3) has first group of joint-cutting (311), the output face (32) of described photocon (3) has second group of joint-cutting (321), every group of joint-cutting comprises four joint-cuttings, article four, joint-cutting is parallel in twos, and vertical with all the other two joint-cuttings, form " well " word shape; First group of joint-cutting (311) is vertical with receiving plane (31), tangential output face (32) and not running through; Second group of joint-cutting (321) is vertical with output face (32), tangential receiving plane (31) and not running through; And filled the material that passage of scintillation light is had reflection potential in every joint-cutting.
2. scintillation detector as claimed in claim 1 is characterized in that, described photocon (3) is: receiving plane (31) is relative with output face (32) and be the identical rectangle of shape, and peripheric surface is the hexahedron of shape identical rectangular; Perhaps, described photocon (3) is: receiving plane (31) and output face (32) relatively and be the rectangle that shape is identical, area is different, and the peripheric surface identical trapezoidal prism-frustum-shaped hexahedron that is shape.
3. scintillation detector as claimed in claim 1 is characterized in that, the degree of depth of first group of joint-cutting (311) and second group of joint-cutting (321) between photocon (3) thickness 1/2nd to 2/3rds between.
4. scintillation detector as claimed in claim 1 is characterized in that, described reflecting material is diffuse-reflective material or specular reflective material.
5. scintillation detector as claimed in claim 1 is characterized in that, described reflecting material and described photocon (3) adopt Air Coupling or optical cement coupling.
6. scintillation detector as claimed in claim 1 is characterized in that, the side of described photocon (3) is provided with reflecting material.
7. scintillation detector as claimed in claim 6 is characterized in that, the reflecting material of described photocon (3) side and described photocon (3) adopt optical cement coupling.
8. scintillation detector as claimed in claim 1 is characterized in that, the area of the receiving plane (31) of described photocon (3) is greater than the area of the output face (32) of described photocon (3).
9. scintillation detector as claimed in claim 1 is characterized in that, the side of described photocon (3) is smooth flat.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210397420.9A CN102879798B (en) | 2012-10-18 | 2012-10-18 | For the scintillation detector of ray imaging device |
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| CN201210397420.9A CN102879798B (en) | 2012-10-18 | 2012-10-18 | For the scintillation detector of ray imaging device |
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| CN102879798B CN102879798B (en) | 2016-01-06 |
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| CN104745470A (en) * | 2013-12-30 | 2015-07-01 | 苏州瑞派宁科技有限公司 | Multichannel in vitro metabolism real-time monitoring device |
| CN105005069A (en) * | 2015-07-08 | 2015-10-28 | 清华大学 | Multi-gap resistive plate chamber detector |
| CN107167832A (en) * | 2017-07-28 | 2017-09-15 | 苏州瑞派宁科技有限公司 | A kind of nuclear detector |
| CN108519616A (en) * | 2018-03-26 | 2018-09-11 | 重庆睿视兴科技有限公司 | A kind of scintillator design principle and method improving industry CT detectivity |
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Effective date of registration: 20230208 Address after: 100049 No. 19, Yuquanlu Road, Beijing, Shijingshan District Patentee after: INSTITUTE OF HIGH ENERGY PHYSICS, CHINESE ACADEMY OF SCIENCES Patentee after: Jinan Zhongke Nuclear Technology Research Institute Address before: 100049 Beijing Shijingshan District 19 Yuquanlu Road No. 2 hospital Patentee before: INSTITUTE OF HIGH ENERGY PHYSICS, CHINESE ACADEMY OF SCIENCES |