CN202075417U - Scintillation probe - Google Patents
Scintillation probe Download PDFInfo
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- CN202075417U CN202075417U CN2011201407303U CN201120140730U CN202075417U CN 202075417 U CN202075417 U CN 202075417U CN 2011201407303 U CN2011201407303 U CN 2011201407303U CN 201120140730 U CN201120140730 U CN 201120140730U CN 202075417 U CN202075417 U CN 202075417U
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- scintillation
- shell
- camera bellows
- crystal
- photoconduction
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Abstract
A scintillation probe comprises a shell. A camera obscura is arranged in the shell; openings are arranged at the upper ends and the lower ends of the shell and the camera obscura respectively; a front end electronics circuit is arranged between the top of the shell and the top of the camera obscura; a plurality of photoelectric conversion devices are arranged in the camera obscura; a scintillation crystal which can detect gamma rays is arranged at the front end of the photoelectric conversion device, and is fixed at the opening end of the shell by a flange plate; and a light guide and an auxiliary shielding plate which can shield the gamma rays are arranged between the photoelectric conversion devices and the scintillating crystal. In the scintillating probe, a shielding space is narrowed into a shielding crystal, and the photoelectric conversion devices are not contained, so that the shielding space is greatly narrowed, and further the weight of a used shielding material is reduced correspondingly.
Description
Technical field
The present invention relates to the nucleus medical image instrument field, be used in gamma camera and single photon emission computed tomography device especially.
Background technology
Scintillation probe is a kind of gamma ray detection device, and it is made up of collimating apparatus, scintillation crystal (a kind of scitillating material of surveying gamma rays), photomultiplier (a kind of electrooptical device) and front-end electronics circuit.Collimating apparatus limits the incident direction of gamma rays, and the gamma rays that has only incident direction to satisfy certain condition could enter, shine on the scintillation crystal from the scintillation crystal front end face; The effect of scintillation crystal is that gamma rays is converted to the fluorescence that can be surveyed by follow-up photomultiplier; The scintillation crystal back is photomultiplier matrix or position sensitive photo-multiplier tube, and they are responsive especially to the fluorescence that scintillation crystal sends, and fluorescence is realized that by opto-electronic conversion and electron multiplication fluorescence is to the conversion of electronics and the amplification of electronic signal; The front-end electronics circuit is powered to photomultiplier, and its output is further amplified, and also can calculate the incoming position of gamma rays according to the output of photomultiplier.
Scintillation probe gamma rays shielding mode in the past adopts plumbous as shielding material usually, directly with crystal (removing front end face), photomultiplier, and the whole encapsulation of part front-end electronics circuit is got up, this part shielding material is very heavy, make the probe overall weight increase, cause the huge of final equipment, also increased the cost of machinery and automatically controlled aspect.
Summary of the invention
Technical matters to be solved by this invention provides a kind of scintillation probe, reduces the use amount of shielding material in the scintillation probe, and then reduces the weight of scintillation probe, the load and the cost of the final equipment of reduction.
For solving the problems of the technologies described above, technical scheme of the present invention is: a kind of scintillation probe, comprise shell, be provided with camera bellows in the described shell, shell and camera bellows are the upper and lower end opening, are provided with the front-end electronics circuit between described camera bellows top and the cover top portion, are provided with some electrooptical devices in the described camera bellows, described electrooptical device front end is provided with the scintillation crystal of detectable gamma ray, and described scintillation crystal relies on ring flange to be fixed on described shell aperture end; Be provided with the photoconduction and the auxiliary shield plate of maskable gamma ray between described electrooptical device and the scintillation crystal, corresponding each photoelectric commutator place is provided with preceding hole on the described auxiliary shield plate, is provided with a photoconduction in the described preceding hole.The principle of work of scintillation probe is: gamma photons incides on the scintillation crystal from crystal incident end behind collimating device collimation, interacts with crystalline solid, and its energy is all or part of to be lost in the crystal, produces fluorescence; Fluorescence is collected, changes, is doubled through electrooptical device, changes electric signal into; Subsequent conditioning circuit calculates the incoming position of incident gamma photons according to the electrooptical device amplitude distribution of representing fluorescence distribution.Probe is used for surveying from the gamma photons of scintillation crystal front incident, all will effectively be masked from the gamma photons of crystal on side face and back incident.To the most effective shielding material of gamma photons is the material of high density, high atomic number.If between electrooptical device and scintillation crystal, do not increase the auxiliary shield plate, gamma photons will see through on probing shell, camera bellows, electrooptical device or the like incident scintillation crystal, the gamma photons that detects like this will add a lot of noises or even pseudo-shadow in distributing.The present invention narrows down to shielding space to the shielding crystal, and does not comprise electrooptical device, and shielding space has dwindled greatly, and the shielding material of use has reduced a lot of weight with regard to corresponding.Again because will allow electrooptical device observe fluorescence distribution on the scintillation crystal, thus we with regard to require shielding material between electrooptical device and the scintillation crystal and have good visible light transmissivity and be placed on electrooptical device and scintillation crystal between.
As improvement, described electrooptical device is array and arranges in camera bellows.
As improvement, described photoelectric commutator is a photomultiplier, the fluorescence of gamma ray and scintillation crystal reaction can be collected, changes, is doubled through light, changes electric signal into.
As improvement, described auxiliary shield plate is the lead glass plate, and lead glass shielding material has good visible light transmissivity.
As improvement, described photoconduction is less near an end diameter of described photoelectric commutator.The less end of described photoconduction is rounded, and the other end is sexangle; The less end of perhaps described photoconduction is rounded, and the other end is square.
As improvement, described light guide side is passed through sandblast, is smeared diffuse scattering whitewash or the processing of other reflecting materials, and this processing can improve the light transmissioning efficiency of photoconduction.
For solving the problems of the technologies described above, another technical scheme of the present invention is: a kind of scintillation probe that has the gamma ray function of shielding, comprise shell, be provided with camera bellows in the described shell, shell and camera bellows are the upper and lower end opening, be provided with the front-end electronics circuit between described camera bellows top and the cover top portion, be provided with some electrooptical devices in the described camera bellows, described electrooptical device front end is provided with the scintillation crystal of detectable gamma ray, and described scintillation crystal relies on ring flange to be fixed on described shell aperture end; Be provided with the photoconduction and the auxiliary shield plate of maskable gamma ray between described electrooptical device and the scintillation crystal, the area of described photoconduction and auxiliary shield plate covers the distributed areas of described photoelectric commutator.The principle of work of scintillation probe is: gamma photons incides on the scintillation crystal from crystal incident end behind collimating device collimation, interacts with crystalline solid, and its energy is all or part of to be lost in the crystal, produces fluorescence; Fluorescence is collected, changes, is doubled through electrooptical device, changes electric signal into; Subsequent conditioning circuit calculates the incoming position of incident gamma photons according to the electrooptical device amplitude distribution of representing fluorescence distribution.Probe is used for surveying from the gamma photons of scintillation crystal front incident, all will effectively be masked from the gamma photons of crystal on side face and back incident.To the most effective shielding material of gamma photons is the material of high density, high atomic number.If between electrooptical device and scintillation crystal, do not increase the auxiliary shield plate, gamma photons will see through on probing shell, camera bellows, electrooptical device or the like incident scintillation crystal, the gamma photons that detects like this will add a lot of noises or even pseudo-shadow in distributing.The present invention narrows down to shielding space to the shielding crystal, and does not comprise electrooptical device, and shielding space has dwindled greatly, and the shielding material of use has reduced a lot of weight with regard to corresponding.Again because will allow electrooptical device observe fluorescence distribution on the scintillation crystal, thus we with regard to require shielding material between electrooptical device and the scintillation crystal and have good visible light transmissivity and be placed on electrooptical device and scintillation crystal between.
As improvement, described electrooptical device is array and arranges in camera bellows; Described photoelectric commutator is a photomultiplier; Described auxiliary shield plate is the lead glass plate.(annotate: the description here is at the another one technical scheme, strict two technical schemes writing together, content is can not intersect to use)
The beneficial effect that the present invention is compared with prior art brought is:
The present invention narrows down to shielding space to the shielding crystal, and does not comprise electrooptical device, and shielding space has dwindled greatly, and the shielding material of use has reduced a lot of weight with regard to corresponding; Again because will allow photomultiplier observe fluorescence distribution on the crystal, so we have good visible light transmissivity with regard to requiring the shielding material between photomultiplier and the scintillation crystal, therefore we adopt lead glass to be made into photoconduction, are placed between photomultiplier and the scintillation crystal; After light guide side reflects processing, guarantee under the prerequisite of light transmissioning efficiency, can be little with doing away from the end face of crystal one side, thus reduction is to the requirement of photomultiplier diameter, saving cost that so again can be a large amount of.
Description of drawings
Fig. 1 is a partial sectional view of the present invention.
Fig. 2 is embodiment 1 a guide structure synoptic diagram.
Fig. 3 is embodiment 2 guide structure synoptic diagram.
Embodiment
As shown in Figure 1, a kind of scintillation probe comprises shell 1, is provided with camera bellows 3 in the described shell 1, and shell 1 and camera bellows 3 are the upper and lower end opening.Be provided with front-end electronics circuit 2 between described camera bellows 3 tops and shell 1 top, be provided with some photomultipliers 4 that array distributes that are in the described camera bellows 3, the scintillation crystal 7 that described photomultiplier 4 front ends are provided with detectable gamma ray is NaI (Tl) crystal, and described scintillation crystal 7 relies on ring flange 8 to be fixed on described shell 1 openend.Be provided with the photoconduction 6 and the auxiliary shield plate 5 of maskable gamma ray between described photomultiplier 4 and the scintillation crystal 7, corresponding each photomultiplier 4 place are provided with preceding hole on the described auxiliary shield plate 5, are provided with a photoconduction 6 in the described preceding hole.As shown in Figure 2, described photoconduction 6 is less near an end diameter of described photomultiplier 4, the less end of described photoconduction 6 is rounded, the other end is sexangle, collect and can handle photoconduction 6 sides in order to improve light, diffuse scattering whitewash (coating should not change performance in the silicone oil environment) is smeared in photoconduction 6 sides.
The principle of work of scintillation probe is: incide on NaI (Tl) crystal from crystal incident end, interact with crystalline solid, its energy is all or part of to be lost in the crystal, produces fluorescence; Fluorescence is collected, changes, is doubled through photomultiplier 4, changes electric signal into, and subsequent conditioning circuit calculates the incoming position of incident gamma photons according to photomultiplier 4 amplitude distribution of representing fluorescence distribution.Probe is used for surveying from the gamma photons of scintillation crystal 7 front incidents, all will effectively be masked from the gamma photons of crystal on side face and back incident.To the most effective shielding material of gamma photons is the material of high density, high atomic number.If between photomultiplier 4 and scintillation crystal 7, do not increase auxiliary shield plate 5, gamma photons will see through on probing shell 1, camera bellows 3, photomultiplier 4 or the like incident scintillation crystal 7, the gamma photons that detects like this will add a lot of noises or even pseudo-shadow in distributing.The present invention narrows down to shielding space to the shielding crystal, and does not comprise photomultiplier 4, and shielding space has dwindled greatly, and the shielding material of use has reduced a lot of weight with regard to corresponding.Because will allow photomultiplier 4 observe fluorescence distribution on the scintillation crystal 7, so we have good visible light transmissivity with regard to requiring the shielding material between photomultiplier 4 and the scintillation crystal 7, present embodiment employing lead glass is as shielding material again.
As shown in Figure 1, a kind of scintillation probe comprises shell 1, is provided with camera bellows 3 in the described shell 1, and shell 1 and camera bellows 3 are the upper and lower end opening.Be provided with front-end electronics circuit 2 between described camera bellows 3 tops and shell 1 top, be provided with some photomultipliers 4 that array distributes that are in the described camera bellows 3, the scintillation crystal 7 that described photomultiplier 4 front ends are provided with detectable gamma ray is NaI (Tl) crystal, and described scintillation crystal 7 relies on ring flange 8 to be fixed on described shell 1 openend.Be provided with the photoconduction 6 and the auxiliary shield plate 5 of maskable gamma ray between described photomultiplier 4 and the scintillation crystal 7, corresponding each photomultiplier 4 place are provided with preceding hole on the described auxiliary shield plate 5, are provided with a photoconduction 6 in the described preceding hole.As shown in Figure 3, described photoconduction 6 is less near an end diameter of described photomultipliers 4, and the less end of described photoconduction 6 is rounded, and the other end is square, collects and can handle photoconduction 6 sides in order to improve light, and blasting treatment is carried out in photoconduction 6 sides.
The principle of work of scintillation probe is: incide on NaI (Tl) crystal from crystal incident end, interact with crystalline solid, its energy is all or part of to be lost in the crystal, produces fluorescence; Fluorescence is collected, changes, is doubled through photomultiplier 4, changes electric signal into, and subsequent conditioning circuit calculates the incoming position of incident gamma photons according to photomultiplier 4 amplitude distribution of representing fluorescence distribution.Probe is used for surveying from the gamma photons of scintillation crystal 7 front incidents, all will effectively be masked from the gamma photons of crystal on side face and back incident.To the most effective shielding material of gamma photons is the material of high density, high atomic number.If between photomultiplier 4 and scintillation crystal 7, do not increase auxiliary shield plate 5, gamma photons will see through on probing shell 1, camera bellows 3, photomultiplier 4 or the like incident scintillation crystal 7, the gamma photons that detects like this will add a lot of noises or even pseudo-shadow in distributing.The present invention narrows down to shielding space to the shielding crystal, and does not comprise photomultiplier 4, and shielding space has dwindled greatly, and the shielding material of use has reduced a lot of weight with regard to corresponding.Because will allow photomultiplier 4 observe fluorescence distribution on the scintillation crystal 7, so we have good visible light transmissivity with regard to requiring the shielding material between photomultiplier 4 and the scintillation crystal 7, present embodiment employing lead glass is as shielding material again.
Embodiment 3
A kind of scintillation probe comprises shell 1, is provided with camera bellows 3 in the described shell 1, and shell 1 and camera bellows 3 are the upper and lower end opening.Be provided with front-end electronics circuit 2 between described camera bellows 3 tops and shell 1 top, be provided with some photomultipliers 4 that array distributes that are in the described camera bellows 3, the scintillation crystal 7 that described photomultiplier 4 front ends are provided with detectable gamma ray is NaI (Tl) crystal, and described scintillation crystal 7 relies on ring flange 8 to be fixed on described shell 1 openend.Be provided with the photoconduction and the auxiliary shield plate of maskable gamma ray between described photomultiplier 4 and the scintillation crystal 7, the auxiliary shield plate is above photoconduction, and the area of described photoconduction and auxiliary shield plate covers the distributed areas of described photoelectric commutator.
The principle of work of scintillation probe is: incide on NaI (Tl) crystal from crystal incident end, interact with crystalline solid, its energy is all or part of to be lost in the crystal, produces fluorescence; Fluorescence is collected, changes, is doubled through photomultiplier 4, changes electric signal into, and subsequent conditioning circuit calculates the incoming position of incident gamma photons according to photomultiplier 4 amplitude distribution of representing fluorescence distribution.Probe is used for surveying from the gamma photons of scintillation crystal 7 front incidents, all will effectively be masked from the gamma photons of crystal on side face and back incident.To the most effective shielding material of gamma photons is the material of high density, high atomic number.If between photomultiplier 4 and scintillation crystal 7, do not increase auxiliary shield plate 5, gamma photons will see through on probing shell 1, camera bellows 3, photomultiplier or the like incident scintillation crystal 7, the gamma photons that detects like this will add a lot of noises or even pseudo-shadow in distributing.The present invention narrows down to shielding space to the shielding crystal, and does not comprise photomultiplier 4, and shielding space has dwindled greatly, and the shielding material of use has reduced a lot of weight with regard to corresponding.Because will allow photomultiplier 4 observe fluorescence distribution on the scintillation crystal 7, so we have good visible light transmissivity with regard to requiring the shielding material between photomultiplier 4 and the scintillation crystal 7, present embodiment employing lead glass is as shielding material again.
Claims (10)
1. scintillation probe, comprise shell, be provided with camera bellows in the described shell, shell and camera bellows are the upper and lower end opening, be provided with the front-end electronics circuit between described camera bellows top and the cover top portion, be provided with some electrooptical devices in the described camera bellows, described electrooptical device front end is provided with the scintillation crystal of detectable gamma ray, and described scintillation crystal relies on ring flange to be fixed on described shell aperture end; It is characterized in that: be provided with the photoconduction and the auxiliary shield plate of maskable gamma ray between described electrooptical device and the scintillation crystal, corresponding each photoelectric commutator place is provided with preceding hole on the described auxiliary shield plate, is provided with a photoconduction in the described preceding hole.
2. a kind of scintillation probe according to claim 1 is characterized in that: described electrooptical device is array and arranges in camera bellows.
3. want according to right: 1 or 2 described a kind of scintillation probes is characterized in that: described photoelectric commutator is a photomultiplier.
4. a kind of scintillation probe according to claim 1 is characterized in that: described auxiliary shield plate is the lead glass plate.
5. a kind of scintillation probe according to claim 1 is characterized in that: described photoconduction is less near an end diameter of described photoelectric commutator.
6. a kind of scintillation probe according to claim 5 is characterized in that: the less end of described photoconduction is rounded, and the other end is sexangle.
7. a kind of scintillation probe according to claim 5 is characterized in that: the less end of described photoconduction is rounded, and the other end is square.
8. according to claim 6 or 7 described a kind of scintillation probes, it is characterized in that: described light guide side is through sandblast or smear the processing of diffuse scattering whitewash.
9. scintillation probe, comprise shell, be provided with camera bellows in the described shell, shell and camera bellows are lower ending opening, be provided with the front-end electronics circuit between described camera bellows top and the cover top portion, be provided with some electrooptical devices in the described camera bellows, described electrooptical device front end is provided with the scintillation crystal of detectable gamma ray, and described scintillation crystal relies on ring flange to be fixed on described shell aperture end; It is characterized in that: be provided with the photoconduction and the auxiliary shield plate of maskable gamma ray between described electrooptical device and the scintillation crystal, the area of described photoconduction and auxiliary shield plate covers the distributed areas of described photoelectric commutator.
10. a kind of scintillation probe according to claim 1 is characterized in that: described electrooptical device is array and arranges in camera bellows; Described photoelectric commutator is a photomultiplier; Described auxiliary shield plate is the lead glass plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201407303U CN202075417U (en) | 2011-05-04 | 2011-05-04 | Scintillation probe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201407303U CN202075417U (en) | 2011-05-04 | 2011-05-04 | Scintillation probe |
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| CN202075417U true CN202075417U (en) | 2011-12-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011201407303U Expired - Fee Related CN202075417U (en) | 2011-05-04 | 2011-05-04 | Scintillation probe |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102183778A (en) * | 2011-05-04 | 2011-09-14 | 深圳市贝斯达医疗器械有限公司 | Flashing probe |
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2011
- 2011-05-04 CN CN2011201407303U patent/CN202075417U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102183778A (en) * | 2011-05-04 | 2011-09-14 | 深圳市贝斯达医疗器械有限公司 | Flashing probe |
| CN102183778B (en) * | 2011-05-04 | 2017-10-31 | 深圳市贝斯达医疗股份有限公司 | A kind of scintillation detector |
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| C14 | Grant of patent or utility model | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111214 Termination date: 20120504 |