CN203012145U - Crystal detector - Google Patents
Crystal detector Download PDFInfo
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- CN203012145U CN203012145U CN 201220742679 CN201220742679U CN203012145U CN 203012145 U CN203012145 U CN 203012145U CN 201220742679 CN201220742679 CN 201220742679 CN 201220742679 U CN201220742679 U CN 201220742679U CN 203012145 U CN203012145 U CN 203012145U
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- Prior art keywords
- crystal
- counter
- exit facet
- scintillation
- scintillation crystal
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Abstract
The utility model relates to a crystal detector. A crystal is formed by the array arrangement of a plurality of crystal units, each crystal unit comprises a flashing crystal block and a flashing crystal block of which the emitting face is processed, and a part of the processed emitting face of the crystal block is carried out the shading processing. The detector is used for the above crystal and also comprises a silicon photomultiplier (SPM), and a plurality of signal units are arranged on the SPM. The signal units and the crystal units are in one-to-one correspondence, and the signal units can receive the light signals sent out by the crystal units. The crystal detector of the utility model breaks through the dimension restriction of the signal units of the conventional SPM, enables the resolution to be improved substantially under the premise of not reducing the dimensions of the signal units of the SPM.
Description
Technical field
The utility model relates to photoelectron material field, particularly a kind of crystal counter.
Background technology
Scintillation crystal is a kind of under the shock of X/ gamma-rays and ray high energy particle, is the crystal of visible light with the kinetic transformation of high energy particle, is the critical component that CT in medical imaging and PET obtain image.
Positron emission tomography device (PET, Positron Emission Tomography) be after x-ray tomography imaging (X-CT) and magnetic resonance imaging (MRI) technology, Computed tomography be applied to the field of nuclear medicine and a kind of novel large medical equipment that grows up.It is utilize with the closely-related emissivity isotope of human body as
11C、
15O、
13N、
18F etc. can produce the nucleic of positron as tracer agent, by focus part, focus functional metabolism state are understood in the picked-up of tracer agent, thus the medical imaging device that disease is judged.
Complete positron emission tomography device (PET) mainly is comprised of PET scanner and bevatron two parts.Cyclotron is used for producing the isotope of radiation positron, as
11C、
18F etc., the PET scanner collects isotope in human body through the photon signal that annihilation reaction is emitted, carry out data by computing machine and process, and make image and rebuild computing, obtains the metabolic images at the tested position of human body.
Detector is the critical component of PET scanner, this detector usually by receive gamma-rays and convert thereof into the scintillation crystal of visible light signal, the photomultiplier (SPM) that receives photon signal forms.The corresponding pixel of the minimum unit of next silicon photomultiplier of normal conditions, i.e. corresponding SPM signal element of scintillation crystal bar, that is to say SPM signal element size restrictions the resolution of detector.
The utility model content
Technical problem to be solved in the utility model is, the present situation that the resolution that breaks through present PET detector is determined by the size restrictions of SPM signal element usually, under the prerequisite that does not reduce SPM signal element size, increase substantially the resolution of PET detector by the processing to scintillation crystal.
The utility model is to realize like this, a kind of crystal counter is provided, the crystal of crystal counter is comprised of some crystal unit array arrangements, crystal unit comprises a scintillation crystal piece and the treated scintillation crystal piece of an exit facet, the part of the exit facet of treated scintillation crystal piece is through shading treatment, crystal counter also comprises silicon photomultiplier, be provided with some signal elements on silicon photomultiplier, signal element is corresponding one by one with crystal unit, and signal element can receive the light signal that is sent by crystal unit; Crystal directly is connected with silicon photomultiplier is bonding by UV glue.
Further, half process shading treatment of treated scintillation crystal piece exit facet.
Further, shading treatment is for adopting vacuum coating method that half exit facet of scintillation crystal piece is processed, and the color of vacuum film is black.
Further, shading treatment is for adopting the paint spraying method that half exit facet of scintillation crystal piece is processed, and the spraying color is black.
Further, shading treatment makes light in this face generation diffuse reflection for adopting polishing process that half exit facet of scintillation crystal piece is processed.
Further, shading treatment is processed half exit facet of scintillation crystal piece for the method that adopts the rear paint spraying of first polishing, and the spraying color is black.
Further, shading treatment forms a step for adopting a part of material of half exit facet of first removing the scintillation crystal piece, then fills lighttight material on this step.
Further, scintillation crystal piece and treated scintillation crystal piece are to contain one or more in LYSO, Na:CsI, BGO, GSO, T1:NaI, BaF2, YAP, LSO and LaBr3, or the crystal of its combination in any.
Further, crystal counter is the PET detector.
Compared with prior art, the crystal of crystal counter of the present utility model is comprised of some crystal unit array arrangements, crystal unit comprises a scintillation crystal piece and the treated scintillation crystal piece of an exit facet, and arranges in the mode of scintillation crystal piece and treated scintillation crystal piece space.Crystal counter of the present utility model also comprises silicon photomultiplier, is provided with some signal elements on silicon photomultiplier, and signal element is corresponding one by one with crystal unit, and signal element can receive the light signal that is sent by crystal unit.When the scintillation crystal piece receives the X/ radiation gamma, the scintillation crystal piece is luminous, signal element can detect the light signal of scintillation crystal piece, because some processed surface portion of the scintillation crystal piece issued light of processing absorbs, therefore the light intensity of going out from exit facet is less than the light intensity of the scintillation crystal piece of unprocessed mistake, therefore signal element can be distinguished the light signal that different scintillation crystal pieces send.Like this, a signal element can produce two pixels, thereby improves exponentially the resolution of detector.
Description of drawings
Fig. 1 is the schematic perspective view of the crystal arrangement method of prior art;
Fig. 2 is the floor map of crystal arrangement method of the present utility model;
Fig. 3 is the solid intention of the embodiment one of treated scintillation crystal piece exit facet shading treatment in Fig. 2;
Fig. 4 is the solid intention of the embodiment five of treated scintillation crystal piece exit facet shading treatment in Fig. 2;
Fig. 5 is the schematic perspective view of crystal counter of the present utility model;
Fig. 6 is the decomposing schematic representation of Fig. 5.
Embodiment
In order to make technical problem to be solved in the utility model, technical scheme and beneficial effect clearer, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explaining the utility model, and be not used in restriction the utility model.
Please refer to shown in Figure 1ly, the crystal arrangement mode of prior art is: crystal 1 is comprised of some crystal unit 2 array arrangements.
Please refer to shown in Figure 2, crystal arrangement method of the present utility model is: crystal 3 is comprised of some crystal unit 4 array arrangements, crystal unit 4 comprises a scintillation crystal piece 5 and the treated scintillation crystal piece 6 of an exit facet, and the part of the exit facet 61 of treated scintillation crystal piece 6 is through shading treatment.Neighbouring crystal unit 4 is arranged with scintillation crystal piece 5 and the mode of treated scintillation crystal piece 6 spaces, and the adjacent crystal unit 4 in left and right is arranged with shading surface on the exit facet 61 of treated scintillation crystal piece 6 611 and the mode of non-shading surface 612 spaces.In the present embodiment, half process shading treatment of the exit facet 61 of treated scintillation crystal piece 6.
in the present embodiment, scintillation crystal piece 5 and treated scintillation crystal piece 6 are for containing LYSO(cerium doped lutetiumyttrium orthosilicate, yttrium luetcium silicate), Na:CsI (sodium doped cesium iodide, cesium iodide), BGO(bismuth germinate, bismuth germanium oxide), GSO(cerium doped gadoliniumorthosilicate, gadolinium siliate), T1:NaI(thallium doped sodium iodide, sodium iodide), BaF2(barium fluoride, barium fluoride), YAP(cerium doped yttriumaluminate, yttrium aluminate), LSO(cerium doped lutetium oxyorithosilicate, the silicic acid lutetium) and LaBr3(lanthanum bromide, lanthanum bromide) one or more in, or the crystal of its combination in any.
The part that the utility model provides the exit facet 61 of several treated scintillation crystal pieces 6 is carried out the embodiment of shading treatment:
Embodiment one: adopt vacuum coating method that the exit facet 61 of scintillation crystal piece 6 is processed, vacuum film on half plated surface therein, the color of film is black, prevents that light signal from passing through, and plays interception.Exit facet 61 is processed rear generation shading surface 611 and non-shading surface 612.Please refer to shown in Figure 3.
Embodiment two: adopt the paint spraying method that the exit facet 61 of scintillation crystal piece 6 is processed, half surface spraying therein, the color of spraying is black, prevents that light signal from passing through, and plays interception.Exit facet 61 is processed rear generation shading surface 611 and non-shading surface 612.Also please refer to shown in Figure 3.
Embodiment three: adopt polishing process that the exit facet 61 of scintillation crystal piece 6 is processed, make light in this face generation diffuse reflection, prevent the light signal straight-line pass, play interception.
Embodiment four: adopt the method for the rear paint spraying of first polishing that the exit facet 61 of scintillation crystal piece 6 is processed, the spraying color is black, prevents that light signal from passing through, and plays interception.Exit facet 61 is processed rear generation shading surface 611 and non-shading surface 612.Also please refer to shown in Figure 3.
Embodiment five: adopt a part of material of the exit facet 61 of first removing scintillation crystal piece 6', form a step, then fill lighttight material on this step, prevent that light signal from passing through, and plays interception.Exit facet 61 is processed rear generation shading surface 611' and non-shading surface 612'.Please refer to shown in Figure 4.
Please refer to shown in Fig. 5 and 6, be a kind of crystal counter 7 that adopts above-mentioned crystal 3 to make, crystal counter 7 also comprises silicon photomultiplier 8, be provided with some signal elements 9 on silicon photomultiplier, signal element 9 is corresponding one by one with crystal unit 4, and signal element 9 can receive the light signal that is sent by crystal unit 4; Crystal 3 directly is connected with silicon photomultiplier 8 is bonding by UV glue.
In the utility model, crystal counter 7 is the PET detector.When crystal unit 4 received the X/ radiation gamma, crystal unit 4 was luminous, and silicon photomultiplier 8 can detect the light signal of crystal unit 4.Because some shading surface 611 of being processed by blacking on exit facet 61 of treated scintillation crystal piece 6 issued lights partially absorbs, therefore the light intensity of going out from exit facet 61 is less than the light intensity of the scintillation crystal piece 5 of unprocessed mistake, therefore silicon photomultiplier 8 can be distinguished the light signal that different scintillation crystal pieces send.Like this, the minimum signal unit 9 of a silicon photomultiplier 8 can produce two pixels, thus in the situation that the constant resolution that can increase substantially the PET detector of cost.
The above is only preferred embodiment of the present utility model; not in order to limit the utility model; all any modifications of doing within spirit of the present utility model and principle, be equal to and replace and improvement etc., within all should being included in protection domain of the present utility model.
Claims (9)
1. crystal counter, the crystal of described crystal counter is comprised of some crystal unit array arrangements, described crystal unit comprises a scintillation crystal piece and the treated scintillation crystal piece of an exit facet, the part of the exit facet of described treated scintillation crystal piece is through shading treatment, it is characterized in that, described crystal counter also comprises silicon photomultiplier, be provided with some signal elements on described silicon photomultiplier, described signal element is corresponding one by one with crystal unit, and described signal element can receive the light signal that is sent by described crystal unit; Described crystal directly is connected with described silicon photomultiplier is bonding by UV glue.
2. crystal counter as claimed in claim 1, is characterized in that, half of described treated scintillation crystal piece exit facet is through shading treatment.
3. crystal counter as claimed in claim 2, is characterized in that, described shading treatment is for adopting vacuum coating method that half exit facet of described scintillation crystal piece is processed, and the color of vacuum film is black.
4. crystal counter as claimed in claim 2, is characterized in that, described shading treatment is for adopting the paint spraying method that half exit facet of described scintillation crystal piece is processed, and the spraying color is black.
5. crystal counter as claimed in claim 2, is characterized in that, described shading treatment makes light in this face generation diffuse reflection for adopting polishing process that half exit facet of described scintillation crystal piece is processed.
6. crystal counter as claimed in claim 2, is characterized in that, described shading treatment is processed half exit facet of described scintillation crystal piece for the method that adopts the rear paint spraying of first polishing, and the spraying color is black.
7. crystal counter as claimed in claim 2, is characterized in that, described shading treatment forms a step for adopting a part of material of half exit facet of first removing described scintillation crystal piece, then fill lighttight material on this step.
8. crystal counter as claimed in claim 1, it is characterized in that, described scintillation crystal piece and treated scintillation crystal piece are to contain one or more in LYSO, Na:CsI, BGO, GSO, T1:NaI, BaF2, YAP, LSO and LaBr3, or the crystal of its combination in any.
9. crystal counter as claimed in claim 1, is characterized in that, described crystal counter is the PET detector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220742679 CN203012145U (en) | 2012-12-30 | 2012-12-30 | Crystal detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220742679 CN203012145U (en) | 2012-12-30 | 2012-12-30 | Crystal detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203012145U true CN203012145U (en) | 2013-06-19 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220742679 Expired - Lifetime CN203012145U (en) | 2012-12-30 | 2012-12-30 | Crystal detector |
Country Status (1)
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|---|---|
| CN (1) | CN203012145U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110477942A (en) * | 2019-08-20 | 2019-11-22 | 上海联影医疗科技有限公司 | A kind of pet detector and medical imaging device |
-
2012
- 2012-12-30 CN CN 201220742679 patent/CN203012145U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110477942A (en) * | 2019-08-20 | 2019-11-22 | 上海联影医疗科技有限公司 | A kind of pet detector and medical imaging device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130619 |