CN208399701U - It is a kind of for radiation detection and emit imaging device detector - Google Patents
It is a kind of for radiation detection and emit imaging device detector Download PDFInfo
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- CN208399701U CN208399701U CN201821099524.0U CN201821099524U CN208399701U CN 208399701 U CN208399701 U CN 208399701U CN 201821099524 U CN201821099524 U CN 201821099524U CN 208399701 U CN208399701 U CN 208399701U
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Abstract
The utility model belong to transmitting imaging system technology field, and specifically disclose it is a kind of for radiation detection and emit imaging device detector.The detector includes crystal layer, and the crystal layer includes the sequentially connected lamella crystal structure of multilayer, and is coupled with photosensor layer on the outside of at least one layer of lamella crystal structure, and the photosensor layer includes multiple optical sensors being arranged in array.The detector for being used for radiation detection and emitting imaging device of the utility model, by the way that the continuous lamella crystal structure of multilayer is arranged, the accurate high-energy photon for capturing different location simultaneously converts thereof into multiple small energy photons, multiple optical sensors being arranged in array are coupled on the outside of at least one layer of lamella crystal structure simultaneously, and each sensor couples to form shape identical with lamella crystal structural section to receive the small energy photon, substantially increases the accuracy and sensitivity of detection.
Description
Technical field
The utility model belongs to transmitting imaging system technology field, more particularly, to one kind for radiation detection and
Emit the detector of imaging device.
Background technique
Imaging device is more is used in scientific experiment and medical diagnosis for transmitting.Emit the main of imaging device
Partial detector generally comprises scintillation crystal, optical sensor and other extentions.Emit imaging device detection efficiency and
The shape of sensitivity and detector, the shape of crystal, the arrangement mode of detector and crystal, coupled modes have much relations.Spoke
It penetrates detecting devices and has more finished product used in fields such as traffic, industry, medical treatment, mainly generated under radiation effects using substance
Luminous effect or gas ionization effect carry out work, and the detector module for emitting imaging device is equally applicable to radiation detection.
Chinese patent CN103543463B discloses a kind of detector for emitting imaging device and transmitting imaging device,
The detector includes: crystal layer, and the crystal layer includes multiple scintillation crystals, and the multiple scintillation crystal is arranged in positive five side
Shape or regular hexagon；And photosensor layer, the photosensor layer cover the crystal layer and are spaced apart with the crystal layer
Ground setting, the photosensor layer includes multiple optical sensors, and the multiple optical sensor is arranged in identical as the crystal layer
Shape.The transmitting imaging device for being equipped with detector provided by the invention being capable of sensitivity with higher and detection efficiency.
But by technique, the limitation of cost etc., when crystal size switches to 1mm or less, cost be will increase dramatically.Simultaneously the patent use from
Crystal decoding is dissipated, not can determine that reaction depth information, temporal resolution are to be improved.
Utility model content
Aiming at the above defects or improvement requirements of the prior art, the utility model provide it is a kind of for radiation detection and
The detector for emitting imaging device, by the setting sequentially connected lamella crystal structure of multilayer, and described at least one layer of
Multiple optical sensors being arranged in array are coupled on the outside of layer crystal structure, and each sensor coupling cladding is formed and lamella crystal knot
The identical shape in structure section is to receive the small energy photon, to obtain the spatial positional information of labeled compound, especially
Short transverse substantially increases the accuracy and sensitivity of detection by lamella crystal structure described in multilayer.
To achieve the goals above, it is a kind of for radiation detection and emit imaging device detector, which is characterized in that
Including crystal layer, the crystal layer includes the sequentially connected lamella crystal structure of multilayer, for capturing γ photon and being converted
At multiple small energy photons；
And it is coupled with photosensor layer on the outside of at least one layer of lamella crystal structure, the photosensor layer includes
Multiple optical sensors being arranged in array, multiple optical sensors couple to be formed it is identical with the lamella crystal structural section
Shape, for receiving the small energy photon.
Further, optical reflectance coating is coupled between the lamella crystal structure.
Further, the section of the lamella crystal structure is round or polygon.
Further, between the crystal layer and the photosensor layer using direct-coupling, optical glue couple or height
The mode of light transmittance light-guide material coupling connects.
Further, the spacing between the photosensor layer and the crystal layer is 0mm~30mm.
Further, the height of the photosensor layer is greater than the height of the lamella crystal structure.
Further, the circumscribed circle diameter in the section of the lamella crystal structure is no more than 80mm.
Further, the optical sensor is photomultiplier tube, silicon photomultiplier or avalanche photodide.
In general, mainly have the above technical solutions conceived by the present invention are compared with the prior art, with
Under technological merit:
1. the detector for being used for radiation detection and emitting imaging device of the utility model, is successively connected by the way that multilayer is arranged
The lamella crystal structure connect, the accurate photon for capturing different location simultaneously convert thereof into multiple small energy photons, while at least
Couple multiple optical sensors being arranged in array on the outside of one layer of lamella crystal structure, and each sensor is coupled and to be formed and lamella
The identical shape in crystal structure section is to receive the small energy photon, so that the spatial positional information of labeled compound is obtained,
Especially short transverse accuracy and sensitivity that detection is substantially increased by lamella crystal structure described in one or more layers.
2. the detector for being used for radiation detection and emitting imaging device of the utility model, using sequentially connected lamella
Crystal structure, the decoding precision of γ photon is potential to reach 1mm hereinafter, being superimposed using multi-ply layer crystal structure, very
Easily determine the reaction that crystal occurs in which layer crystal body, so that it is determined that reaction depth information, while lamella crystal structure phase
There is higher temporal resolution for discrete crystal.
3. the utility model for radiation detection and emit the detector of imaging device, set between lamella crystal structure
There is optical reflectance coating, to realize that the lamella crystal structure of adjacent layer is mutually opaque, to precisely obtain labeled compound
Height space location information substantially increases the precision of detection.
4. the detector for being used for radiation detection and emitting imaging device of the utility model, the section of lamella crystal structure
Circumscribed circle diameter be no more than 80mm, improve the decoding precision of detector centre part.
Detailed description of the invention
Fig. 1 is the cross-sectional view for the hexagonal detector that the utility model embodiment is related to；
Fig. 2 is the top view for the hexagonal detector that the utility model embodiment is related to；
Fig. 3 is the top view for the circular detector that the utility model embodiment is related to；
Fig. 4 is the cross-sectional view for the circular detector that the utility model embodiment is related to；
Fig. 5 is the structural schematic diagram for the nonagon detector that the utility model embodiment is related to.
Specific embodiment
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing and implementation
Example, the present invention will be further described in detail.It should be appreciated that specific embodiment described herein is only used to explain
The utility model is not used to limit the utility model.In addition, institute in the various embodiments of the present invention described below
The technical characteristic being related to can be combined with each other as long as they do not conflict with each other.
The utility model embodiment provide it is a kind of for radiation detection and emit imaging device detector, be used for positive electricity
Son transmitting imaging device, it can also be used to radiate source detection apparatus.Crystal layer includes multiple lamella crystal structures, multiple lamella crystals
Structure is arranged in array, and the large end face of lamella crystal structure is polygon, polygon include but is not limited to circle, regular quadrangle,
Regular pentagon, regular hexagon etc..The large end face of lamella crystal structure is polygon, and the circumscribed circle diameter of polygon is no more than
80mm, the large end face of lamella crystal structure be it is circular, circular diameter is no more than 80mm.The circumscribed circle diameter of polygon is excessive, meeting
Cause central part decoding effect poor.For Positron emission tomography equipment, application mode generally injects and has positive electricity
Daughter isotope label compound (such as 18F-FDG), positron isotopes generate decay and release positive electron, positive electron with
Negative electron, which is mutually buried in oblivion, releases a pair of contrary γ photon.Detector generally with more effective structure setting in transmitting at
As the inner surface of equipment, for detecting the γ photon buried in oblivion and released, γ photon has greater probability to send out in lamella crystal structure
Raw reaction, is converted to faint visible light, is received by optical sensor, and then decode response location.By the γ photon letter detected
Available radioisotopic distributed intelligence is ceased, and can realize the three-dimensional reconstruction of labeled compound distribution by computer
Image.The detector can also be used to work as part radiator beta-ray (decay generates positive electron) and the detection device of gamma ray radiator
In.The sensitivity with higher of the detector of the utility model and detection efficiency, and decoding precision with higher and smaller
Error, while there is preferable temporal resolution and energy resolution.
Specifically, detector is hexagonal structure in one embodiment of the utility model.Directly adopt polygon shape
Shape or circular lamella crystal structure, are then stacked into layer crystal body.Illustratively, as depicted in figs. 1 and 2, detector 100 includes three
Layer lamella crystal structure, every layer of lamella crystal structure are the monolith lamella crystal of one piece of regular hexagon.Wherein, three-layer tablet layer crystal body
Structure is respectively the first lamella crystal structure 110, the second lamella crystal structure 120 and third lamella crystal structure 130, and at least
The outside of one layer of lamella crystal structure is equipped with optical sensor.As shown in Figure 1, optical sensor 150 have coupled three-layer tablet layer
Minimum one layer of crystal structure, optical sensor 140 are actually that (real sensor layer is not limited to coupling and cuts open two layers of optical sensor
The two sides that face view is shown), couple two layers of corresponding three-layer tablet layer crystal body texture edge.Optical sensor 140,150
And the side end face of lamella crystal structure is partially fitted in figure using the photosensor layer that serial number marks, carry out eleutheromorph for receiving
Body layer by γ converting photons at small energy photon.The size of lamella crystal structure can there are many, it is, in general, that piece layer crystal
The thickness of body structure is thicker, and the probability for capturing γ photon is bigger, and then detector can be made to have higher sensitivity.
Traditional detector is discrete scintillation crystal, but by technique, the limitation of cost etc., scintillation crystal size switches to 1mm or less
When, cost will increase dramatically, for this purpose, the utility model uses lamella crystal structure, the decoding precision of γ photon is potential to be reached
1mm is hereinafter, this programme is superimposed using multi-ply layer crystal structure, it is easy to judge in which layer lamella crystal structure
The reaction of generation, so that it is determined that reaction depth information, while lamella crystal structure has more for discrete scintillation crystal
High temporal resolution (smaller time interval can be distinguished).
In another embodiment of the utility model, as shown in Figure 3 and Figure 4, detector is circular configuration, inside be
The outboard array of crystal layer 210, the crystal layer 210 is equipped with photosensor layer 220.
In another embodiment of the utility model, as shown in figure 5, detector is nine distressed structures, six layers of positive nine side
Shape lamella crystal structure 310,320,330,340,350 and 360 is coupled together, and is coupled between different layers lamella crystal structure
There is optical reflectance coating, the outer dimension of the positive nonagon lamella crystal structure is completely the same.Six layers of positive nonagon lamella crystal
The outside of structure 310,320,330,340,350 and 360 is coupled with optical sensor 370,380 and 390 according to actual needs.Positive nine
While shape each while corresponding to the side surface coupling photosensor layer number of plies and be not fixed, photosensor layer and lamella crystal structure side
Direct-coupling or photoconductive layer is provided between face.As shown in Figure 5, wherein one or more sides of nonagon are coupled with
Optical sensor, side adjacent thereto are wherein coupled with optical sensor two layers, and the side adjacent with next is wherein coupled with for four layers
Optical sensor, and wherein two layers, four layers of distribution can combine according to actual needs, such as two layers is adjacent or four layers are adjacent.It is preferred that
Ground, the coupling size of photosensor layer are twice of lamella crystal structure height, i.e., single photosensor layer couples two layers of lamella
Crystal.It can detect that the γ photon at different height, and then the γ by detecting by six layers of positive nonagon lamella crystal structure
The available radioisotopic distributed intelligence of photon information, and the three of labeled compound distribution can be realized by computer
Reconstruction image is tieed up, the precision and efficiency of detecting of detector is further improved.
Further, multiple photosensor layers can be photomultiplier tube (PMT), silicon photomultiplier (SIPM), snowslide
One kind of the optical sensors such as photodiode (APD).Photosensor layer is more slightly bigger than the height of lamella crystal structure.
Preferably, optical sensor and lamella crystal structure Coupling are one-to-one, a pair of two and one-to-many form.It is each
The lamella crystal structure of layer is unnecessary all to be coupled, sometimes the coupling unit number of plies.
Preferably, crystal layer is lamella crystal array of structures, and crystal layer respectively corresponds as lamella crystal structure, lamella
Crystal structure can be brilliant for bismuth germanium oxide (BGO) scintillation crystal, lead tungstate (PWO) scintillation crystal, cesium iodide,crystal (CsI (Tl))
Body, silicic acid lutetium (LSO) crystal and silicic acid lutetium-yttrium crystal (LYSO) etc..
Preferably, optical reflectance coating, such as common barium sulfate reflectance coating are coupled between lamella crystal structure, thus real
The lamella crystal structure of existing adjacent layer is mutually opaque, to precisely obtain the height space location information of labeled compound, greatly
The precision of detection is improved greatly.
Preferably, (Air Coupling can be also called, i.e., for direct-coupling between multi-ply layer crystal structure and optical sensor
Directly contact, no couplant), optical glue coupling or high transparency light-guide material coupling.
As it will be easily appreciated by one skilled in the art that the above is only the preferred embodiment of the utility model only, not
To limit the utility model, any modification made within the spirit and principle of the present invention, equivalent replacement and change
Into etc., it should be included within the scope of protection of this utility model.
Claims (8)
1. it is a kind of for radiation detection and emit imaging device detector, which is characterized in that including crystal layer, the crystal
Layer includes the sequentially connected lamella crystal structure of multilayer, for capturing γ photon and converting thereof into multiple small energy photons；And
And photosensor layer is coupled on the outside of at least one layer of lamella crystal structure, the photosensor layer includes multiple in array
The optical sensor of arrangement, multiple optical sensors are coupled to form shape identical with the lamella crystal structural section, are used for
Receive the small energy photon.
2. it is according to claim 1 it is a kind of for radiation detection and emit imaging device detector, which is characterized in that
Optical reflectance coating is coupled between the lamella crystal structure.
3. it is according to claim 1 it is a kind of for radiation detection and emit imaging device detector, which is characterized in that
The section of the lamella crystal structure is round or polygon.
4. it is according to claim 1 it is a kind of for radiation detection and emit imaging device detector, which is characterized in that
It is coupled between the crystal layer and the photosensor layer using direct-coupling, optical glue or high transparency light-guide material couples
Mode connect.
5. it is according to claim 4 it is a kind of for radiation detection and emit imaging device detector, which is characterized in that
Spacing between the photosensor layer and the crystal layer is 0mm~30mm.
6. it is as described in any one in claim 1-5 it is a kind of for radiation detection and emit the detector of imaging device, it is special
Sign is that the height of the photosensor layer is greater than the height of the lamella crystal structure.
7. it is according to claim 1 it is a kind of for radiation detection and emit imaging device detector, which is characterized in that
The circumscribed circle diameter in the section of the lamella crystal structure is no more than 80mm.
A kind of for radiation detection and emit the detector of imaging device 8. as described in claim 1, which is characterized in that institute
Stating optical sensor is photomultiplier tube, silicon photomultiplier or avalanche photodide.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110926622A (en) * | 2019-11-28 | 2020-03-27 | 华中科技大学 | High-energy photon detection device based on lamellar crystal array |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110926622A (en) * | 2019-11-28 | 2020-03-27 | 华中科技大学 | High-energy photon detection device based on lamellar crystal array |
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