CN104793231A - Gamma ray imaging detector and gamma ray imaging detector system having same - Google Patents
Gamma ray imaging detector and gamma ray imaging detector system having same Download PDFInfo
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- CN104793231A CN104793231A CN201510242840.3A CN201510242840A CN104793231A CN 104793231 A CN104793231 A CN 104793231A CN 201510242840 A CN201510242840 A CN 201510242840A CN 104793231 A CN104793231 A CN 104793231A
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Abstract
The present invention discloses a gamma ray imaging detector and a gamma ray imaging detector system having the same. The gamma ray imaging detector comprises a scintillation crystal array and a photoelectric detector, wherein the scintillation crystal array comprises a continuous crystal unit and a plurality of discrete crystal units, the plurality of discrete crystal units are connected in sequence, the plurality of discrete crystal units are arranged on the outer side of the continuous crystal unit, the photoelectric detector is arranged on one side of the scintillation crystal array, and the photoelectric detector is coupled with the scintillation crystal array. According to the gamma ray imaging detector disclosed by the invention, the plurality of discrete crystal units are arranged on the outer side of the continuous crystal unit, to improve the spatial resolution and the visual field of the gamma ray imaging detector.
Description
Technical field
The present invention relates to gamma ray imaging technical field, especially relate to a kind of gamma ray imaging detector and there is its gamma ray imaging detector system.
Background technology
Point out in correlation technique, scintillation detector is widely used in gamma ray detection field, its principle utilizes ray and scintillation crystal effect sedimentary energy, crystal de excitation produces optical photon, optical photon is with certain distribution and propagated, thus detected by photodetector, and then be converted into electric signal, for ray being carried out to energy discrimination and location, position.
In order to improve the spatial resolution of detector, scintillation detector in correlation technique often adopts small size discrete crystal unit spliced to become the mode of scintillation crystal array, but along with the appearance of position sensitive photodetector, scintillation detector in correlation technique also can adopt continuously the mode of large scintillation crystal array coupling junior unit phototube array, and the method adopting multi channel signals to read, the active position estimating ray is carried out according to Light distribation model, to obtain the three dimensional local information of event, but, photon will cause distribution to change in the phenomenon that the lateral boundaries of continuous crystal reflects, cause the border resolution of detector poor.
Summary of the invention
The present invention is intended at least to solve one of technical matters existed in prior art.For this reason, the invention reside in and propose a kind of gamma ray imaging detector, the spatial resolution of described gamma ray imaging detector is high.
The present invention also proposes a kind of gamma ray imaging detector system with above-mentioned gamma ray imaging detector.
Gamma ray imaging detector according to a first aspect of the present invention, comprise: scintillation crystal array, described scintillation crystal array comprises continuous crystal unit and multiple discrete crystal unit, described multiple discrete crystal unit is connected successively, and described multiple discrete crystal unit is located at the outside of described continuous crystal unit; And photodetector, described photodetector is located at the side of described scintillation crystal array, and described photodetector is coupled with described scintillation crystal array.
According to gamma ray imaging detector of the present invention, by the multiple discrete crystal unit of the arranged outside of continuous crystal unit, thus improve spatial resolution and the visual field of gamma ray imaging detector.
Particularly, described multiple discrete crystal unit joins end to end and successively around the arranged outside of described continuous crystal unit.
Alternatively, described multiple discrete crystal unit is included in perpendicular to the many rows on the direction of a side surface of described photodetector.
Alternatively, described multiple discrete crystal unit is included in from being close to the center of described continuous crystal unit towards the multilayer the direction at the center away from described continuous crystal unit.
Alternatively, two often adjacent row or two-layer described discrete crystal unit alternative arrangement, and the material of described multiple discrete crystal unit is all identical.
Alternatively, two often adjacent rows or two-layer described discrete crystal unit correspondence are arranged, and the material of described multiple discrete crystal unit is not identical.
Particularly, the material of described continuous crystal unit and each described discrete crystal unit comprises at least one in bismuth germanium oxide, silicic acid lutetium, yttrium luetcium silicate, gadolinium siliate lutetium, gadolinium siliate, yttrium silicate, barium fluoride, sodium iodide, cesium iodide, lead tungstate, yttrium aluminate, lanthanum bromide, lanthanum chloride, calcium titanium lutetium aluminium, lutetium pyrosilicate, aluminic acid lutetium, iodate lutetium and GAGG respectively.
Particularly, fixed between often adjacent two described discrete crystal unit by optical cement coupling, described discrete crystal unit is coupled fixing by optical cement with described continuous crystal unit.
Further, reflectorized material part is provided with between adjacent two described discrete crystal unit.
Alternatively, described continuous crystal unit is formed as cuboid shape.
Alternatively, each described discrete crystal unit is formed as cuboid shape.
Gamma ray imaging detector system according to a second aspect of the present invention, comprises gamma ray imaging detector according to a first aspect of the present invention.
According to gamma ray imaging detector system of the present invention, by arranging the gamma ray imaging detector of above-mentioned first aspect, thus improve the overall performance of gamma ray imaging detector system.
Alternatively, described multiple gamma ray imaging detector rings is coiled into circular or polygon ring-type.
Additional aspect of the present invention and advantage will part provide in the following description, and part will become obvious from the following description, or be recognized by practice of the present invention.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of gamma ray imaging detector according to an embodiment of the invention;
Fig. 2 is the principle of work schematic diagram of the gamma ray imaging detector shown in Fig. 1;
Fig. 3 is another principle of work schematic diagram of the gamma ray imaging detector shown in Fig. 1;
Fig. 4 is another principle of work schematic diagram of the gamma ray imaging detector shown in Fig. 1;
Fig. 5 is the schematic diagram of gamma ray imaging detector in accordance with another embodiment of the present invention;
Fig. 6 is the schematic diagram of the gamma ray imaging detector according to another embodiment of the present invention;
Fig. 7 is the schematic diagram of gamma ray imaging detector system according to an embodiment of the invention;
Fig. 8 is the schematic diagram of gamma ray imaging detector system in accordance with another embodiment of the present invention.
Reference numeral:
1000: gamma ray imaging detector system;
100: gamma ray imaging detector; 1: crystal unit continuously; 2: discrete crystal unit; 3: photodetector.
Embodiment
Be described below in detail embodiments of the invention, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has element that is identical or similar functions from start to finish.Be exemplary below by the embodiment be described with reference to the drawings, be intended to for explaining the present invention, and can not limitation of the present invention be interpreted as.
Disclosing hereafter provides many different embodiments or example is used for realizing different structure of the present invention.Of the present invention open in order to simplify, hereinafter the parts of specific examples and setting are described.Certainly, they are only example, and object does not lie in restriction the present invention.In addition, the present invention can in different example repeat reference numerals and/or letter.This repetition is to simplify and clearly object, itself does not indicate the relation between discussed various embodiment and/or setting.In addition, the various specific technique that the invention provides and the example of material, but those of ordinary skill in the art can recognize the property of can be applicable to of other techniques and/or the use of other materials.
The gamma ray imaging detector 100 of embodiment is according to a first aspect of the present invention described below with reference to Fig. 1-Fig. 6.
As shown in Figure 1, the gamma ray imaging detector 100 of embodiment according to a first aspect of the present invention, comprising: scintillation crystal array and photodetector 3.Certainly, be understandable that, gamma ray imaging detector 100 can also comprise: sensing circuit (scheming not shown), position decoding module (scheming not shown) and time adjustment module (scheming not shown) etc.
Particularly, scintillation crystal array comprises continuous crystal unit 1 and multiple discrete crystal unit 2, and multiple discrete crystal unit 2 is connected successively, and multiple discrete crystal unit 2 is located at the outside of continuous crystal unit 1.As shown in Figure 1, all discrete crystal unit 2 are all located at the outside of continuous crystal unit 1, wherein, can be fixed by optical cement coupling between two often adjacent discrete crystal unit 2, the discrete crystal unit 2 be directly connected with continuous crystal unit 1 also can be coupled fixing by optical cement with continuous crystal unit 1.Here, it should be noted that, " outward " can be understood as the direction away from continuous crystal unit 1 center, and its reverse direction is defined as " interior ", namely towards the direction at continuous crystal unit 1 center.In addition, it should be noted that, the implication of " coupling is fixing ", known by gamma ray imaging technical field technician, no longer describes in detail here.Certainly, those skilled in the art will also be appreciated that the stickum beyond optical cement can also be adopted to carry out coupling to the continuous crystal unit 1 in scintillation crystal array and discrete crystal unit 2 to be fixed.
Photodetector 3 is located at the side of scintillation crystal array, and photodetector 3 is coupled with scintillation crystal array.For convenience of description, be similar to cylindrical circumference, radial and axial definition, define the circumference of continuous crystal unit 1, radial and axial below, first the outside wall surface being provided with discrete crystal unit 2 of continuous crystal unit 1 is defined as the peripheral wall surfaces of continuous crystal unit 1, thus around the direction of the peripheral wall surfaces circumference that is continuous crystal unit 1 (such as shown in Fig. 1 along clockwise A
1→ A
2→ A
3→ A
4→ A
1the direction of closed hoop), the axis (B such as shown in Fig. 1 that the bearing of trend of the central axis of continuous crystal unit 1 circumference is continuous crystal unit 1
1→ B
2direction), from the radial direction (C such as shown in Fig. 1 that the circumferential centre axis of continuous crystal unit 1 is continuous crystal unit 1 to the direction perpendicular to continuous crystal unit 1 peripheral wall surfaces
1→ C
2, C
3→ C
4, C
5→ C
6, C
7→ C
8direction etc.).Thus, in the example of fig. 1, photodetector 3 is located at continuous crystal unit 1 side axially.
Wherein, scintillation crystal array is coupled with photodetector 3, such as scintillation crystal array can be coupled with photodetector 3 by optical cement, particularly, photodetector 3 can be the detector of position sensing, and it can comprise hyperchannel position sensitive photo-multiplier tube, avalanche photodiode arrays and silicon photomultiplier and add.Photodetector 3 is by sensing circuit read output signal, wherein, sensing circuit is connected with photodetector 3, and sensing circuit adopts multichannel playback mode, namely sensing circuit is hyperchannel sensing circuit, and hyperchannel sensing circuit carries out processing and read output signal with special integrated chip.
Position decoding module is connected with hyperchannel sensing circuit, the signal that hyperchannel sensing circuit reads is decoded by position decoding module, wherein, position decoding module can utilize look-up table, iterative algorithm and gravity model appoach etc. carry out three-dimensional localization to event location, specifically, position decoding module can adopt different algorithms to carry out location, position to continuous crystal unit 1 and discrete crystal unit 2 respectively, with reference to Fig. 2, position decoding module can adopt maximum-likelihood estimation to carry out three-positional fix to continuous crystal unit 1, or use look-up table to carry out template matches to realize location, position, position decoding module can adopt gravity model appoach to position to discrete crystal unit 2, as shown in Figure 3, because most of light is totally reflected in boundary discrete method crystal unit 2, therefore photon is mainly collected by the photodetector 3 on most limit, thus gravity model appoach can be adopted to carry out location, position.Thus, scintillation crystal array is after continuous crystal unit 1 border arranges discrete crystal unit 2, and boundary alignment is effectively improved.
With reference to Fig. 4, time adjustment module is the module utilizing the three dimensional local information of event to correct the time that photon arrives photodetector 3, particularly, time adjustment module can be connected with position decoding module, time adjustment module can utilize actinism depth information to correct Time To Event, for the coincidence imaging of flight time, time corrects as deduction visible ray is in the relation of crystals travel-time Δ t and gamma-ray photon depth of interaction d, i.e. Δ t=d/c, wherein c is the velocity of propagation of light in crystal.Here, it should be noted that, the technology such as photodetector 3, sensing circuit, position decoding module and time adjustment module are well known to those skilled in the art, and no longer describe in detail here.
According to the gamma ray imaging detector 100 of the embodiment of the present invention, by at the multiple discrete crystal unit 2 of the arranged outside of continuous crystal unit 1, thus improve the spatial resolution of gamma ray imaging detector 100, signal to noise ratio (S/N ratio) and the visual field, and the temporal resolution of gamma ray imaging detector 100 is good, spatial resolution consistance is high.
In one embodiment of the invention, multiple discrete crystal unit 2 joins end to end and successively around the arranged outside of continuous crystal unit 1.That is, multiple discrete crystal unit 2 can around continuous crystal unit 1 at least one week.Such as in the example of fig. 1, continuous crystal unit 1 is formed as cuboid shape, and each discrete crystal unit 2 is formed as cuboid shape, and continuous crystal unit 1 centering, strip discrete crystal unit 2 is spliced into square array around continuous crystal.Certainly, the present invention is not limited thereto, continuous crystal unit 1 can also be formed as polygon cylinder body shape, and each discrete crystal unit 2 also can be formed as polygon cylinder body shape.
Alternatively, multiple discrete crystal unit 2 is included in perpendicular to the many rows on the direction of a side surface of photodetector 3.That is, at continuous crystal unit 1 axially, discrete crystal unit 2 can arrange many rows, often arranges discrete crystal unit 2 and is made up of the multiple discrete crystal unit 2 be connected successively in continuous crystal unit 1 circumference.
Wherein, two often adjacent row's discrete crystal unit 2 can alternative arrangement or corresponding layout.That is, multiple discrete crystal unit 2 in adjacent two row's discrete crystal unit 2 at continuous crystal unit 1 axially can be relative one by one, adjacent two arrange the axially all right alternative arrangement of the multiple discrete crystal unit 2 in discrete crystal unit 2 at continuous crystal unit 1, as shown in Figure 5.
As shown in Figure 6, when the multiple discrete crystal unit 2 in adjacent two row's discrete crystal unit 2 continuous crystal unit 1 axially one by one relatively time, the material of multiple discrete crystal unit 2 can be all not identical.Like this, in the process of location, position, can by screening the luminescence decay time information acquisition depth-of-interaction information of different crystal, that is, the discrete crystal unit 2 on limit can adopt the DOI information on the combination acquisition limit of the discrete crystal unit 2 of the different decay of luminescence constant of multilayer.
With reference to Fig. 5, when the multiple discrete crystal unit 2 in adjacent two row's discrete crystal unit 2 are being axially crisscross arranged of continuous crystal unit 1, the material of multiple discrete crystal unit 2 can be identical.Like this, in the process of location, position, depth localization can be carried out by light splitting, that is, light splitting can be utilized to obtain DOI information.
Particularly, multiple discrete crystal unit 2 is included in from being close to the center of continuous crystal unit 1 towards the multilayer the direction at the center away from continuous crystal unit 1.That is, in the radial direction of continuous crystal unit 1, discrete crystal unit 2 can arrange multilayer, and every layer scattering crystal unit 2 is made up of the multiple discrete crystal unit 2 be connected in continuous crystal unit 1 circumference.
Wherein, often adjacent two-layer discrete crystal unit 2 can alternative arrangement or corresponding layout.That is, multiple discrete crystal unit 2 in adjacent two-layer discrete crystal unit 2 can be relative one by one in the radial direction of continuous crystal unit 1, and the multiple discrete crystal unit 2 in adjacent two-layer discrete crystal unit 2 can also alternative arrangement in the radial direction of continuous crystal unit 1.
Multiple discrete crystal unit 2 in adjacent two-layer discrete crystal unit 2 in the radial direction of continuous crystal unit 1 one by one relatively time, the material of multiple discrete crystal unit 2 can be all not identical.Like this, in the process of location, position, can by screening the luminescence decay time information acquisition depth-of-interaction information of different crystal.
When multiple discrete crystal unit 2 in adjacent two-layer discrete crystal unit 2 are crisscross arranged in the radial direction of continuous crystal unit 1, the material of multiple discrete crystal unit 2 can be identical.Like this, in the process of location, position, depth localization can be carried out by light splitting.
Certainly, the present invention is not limited thereto, in other embodiment of the present invention, multiple discrete crystal unit 2 can also both be included in perpendicular to the many rows on the direction of a side surface of photodetector 3, was included in again from being close to the center of continuous crystal unit 1 towards the multilayer the direction at the center away from continuous crystal unit 1.
The material of continuous crystal unit 1 comprises at least one in bismuth germanium oxide, silicic acid lutetium, yttrium luetcium silicate, gadolinium siliate lutetium, gadolinium siliate, yttrium silicate, barium fluoride, sodium iodide, cesium iodide, lead tungstate, yttrium aluminate, lanthanum bromide, lanthanum chloride, calcium titanium lutetium aluminium, lutetium pyrosilicate, aluminic acid lutetium, iodate lutetium and GAGG.That is, continuous crystal unit 1 can be made up of a kind of material in bismuth germanium oxide, silicic acid lutetium, yttrium luetcium silicate, gadolinium siliate lutetium, gadolinium siliate, yttrium silicate, barium fluoride, sodium iodide, cesium iodide, lead tungstate, yttrium aluminate, lanthanum bromide, lanthanum chloride, calcium titanium lutetium aluminium, lutetium pyrosilicate, aluminic acid lutetium, iodate lutetium and GAGG or multiple material.
The material of each discrete crystal unit 2 comprises at least one in bismuth germanium oxide, silicic acid lutetium, yttrium luetcium silicate, gadolinium siliate lutetium, gadolinium siliate, yttrium silicate, barium fluoride, sodium iodide, cesium iodide, lead tungstate, yttrium aluminate, lanthanum bromide, lanthanum chloride, calcium titanium lutetium aluminium, lutetium pyrosilicate, aluminic acid lutetium, iodate lutetium and GAGG.That is, each discrete crystal unit 2 can be made up of a kind of material in bismuth germanium oxide, silicic acid lutetium, yttrium luetcium silicate, gadolinium siliate lutetium, gadolinium siliate, yttrium silicate, barium fluoride, sodium iodide, cesium iodide, lead tungstate, yttrium aluminate, lanthanum bromide, lanthanum chloride, calcium titanium lutetium aluminium, lutetium pyrosilicate, aluminic acid lutetium, iodate lutetium and GAGG or multiple material.
In one particular embodiment of the present invention, according to architectural feature and the setting position of photodetector 3, between two adjacent discrete crystal unit 2, reflectorized material part (such as reflective membrane etc.) is optionally set, when photodetector 3 and discrete crystal unit 2 one_to_one corresponding, reflectorized material can not be provided with between two adjacent discrete crystal unit 2, when photodetector 3 and discrete crystal unit 2 are not one_to_one corresponding, between two adjacent discrete crystal unit 2, reflectorized material part can be provided with.
Wherein, reflectorized material part can be full by the gap-fill between two discrete crystal unit 2, that is, the surface that these adjacent two discrete crystal unit 2 are relative is kept apart by reflectorized material part completely, now, the light path that can mutually circulate is not had completely between two the discrete crystal unit 2 being folded with reflectorized material part, reflectorized material part can also by the gap-fill part between two discrete crystal unit 2, that is, the surface that these adjacent two discrete crystal unit 2 are relative is not kept apart by reflectorized material part completely, namely adjacent this two discrete crystal unit 2 can also have part surfaces opposite to each other, now, be folded with the light path having part mutually to circulate between two discrete crystal unit 2 of reflectorized material part.
The gamma ray imaging detector system 1000 of embodiment is according to a second aspect of the present invention described below with reference to Fig. 7 and Fig. 8.
The gamma ray imaging detector system 1000 of embodiment according to a second aspect of the present invention, comprises the gamma ray imaging detector 100 according to the above-mentioned first aspect embodiment of the present invention.
Alternatively, gamma ray imaging detector system 1000 can comprise multiple with the gamma ray imaging detector 100 of predetermined relationship arrangement, preferably, multiple gamma ray imaging detector 100 evenly can be arranged respectively in the circumference of gamma ray imaging detector system 1000 and axially, now, as shown in Figure 7, multiple gamma ray imaging detector 100 can be around, be spliced into circular gamma ray imaging detector system 1000, as shown in Figure 8, multiple gamma ray imaging detector 100 can be around, be spliced into polygon ring-type gamma ray imaging detector system 1000.Certainly, the present invention is not limited thereto, gamma ray imaging detector system 1000 can also be formed as other shapes.
According to the gamma ray imaging detector system 1000 of the embodiment of the present invention other form and operation be all known for those of ordinary skills, be not described in detail here.
According to the gamma ray imaging detector system 1000 of the embodiment of the present invention, by arranging the gamma ray imaging detector 100 of above-mentioned first aspect embodiment, thus improve the spatial resolution of gamma ray imaging detector system 1000, signal to noise ratio (S/N ratio) and the visual field, reduce the cost of gamma ray imaging detector system 1000.
In describing the invention, it will be appreciated that, term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width ", " thickness ", " on ", D score, " front ", " afterwards ", " left side ", " right side ", " vertically ", " level ", " top ", " end ", " interior ", " outward ", " axis ", " radial direction ", orientation or the position relationship of the instruction such as " circumference " are based on orientation shown in the drawings or position relationship, only the present invention for convenience of description and simplified characterization, instead of indicate or imply that the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore limitation of the present invention can not be interpreted as.
In addition, term " first ", " second " only for describing object, and can not be interpreted as instruction or hint relative importance or imply the quantity indicating indicated technical characteristic.Thus, be limited with " first ", the feature of " second " can express or impliedly comprise one or more these features.In describing the invention, the implication of " multiple " is two or more, unless otherwise expressly limited specifically.
In the present invention, unless otherwise clearly defined and limited, the term such as term " installation ", " being connected ", " connection ", " fixing " should be interpreted broadly, and such as, can be fixedly connected with, also can be removably connect, or integral; Can be mechanical connection, also can be electrical connection, can also be communication; Can be directly be connected, also indirectly can be connected by intermediary, can be the connection of two element internals or the interaction relationship of two elements.For the ordinary skill in the art, above-mentioned term concrete meaning in the present invention can be understood as the case may be.
In the present invention, unless otherwise clearly defined and limited, fisrt feature second feature " on " or D score can be that the first and second features directly contact, or the first and second features are by intermediary indirect contact.And, fisrt feature second feature " on ", " top " and " above " but fisrt feature directly over second feature or oblique upper, or only represent that fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " below " and " below " can be fisrt feature immediately below second feature or tiltedly below, or only represent that fisrt feature level height is less than second feature.
In the description of this instructions, specific features, structure, material or feature that the description of reference term " embodiment ", " some embodiments ", " example ", " concrete example " or " some examples " etc. means to describe in conjunction with this embodiment or example are contained at least one embodiment of the present invention or example.In this manual, to the schematic representation of above-mentioned term not must for be identical embodiment or example.And the specific features of description, structure, material or feature can combine in one or more embodiment in office or example in an appropriate manner.In addition, when not conflicting, the feature of the different embodiment described in this instructions or example and different embodiment or example can carry out combining and combining by those skilled in the art.
Although illustrate and describe embodiments of the invention, those having ordinary skill in the art will appreciate that: can carry out multiple change, amendment, replacement and modification to these embodiments when not departing from principle of the present invention and aim, scope of the present invention is by claim and equivalents thereof.
Claims (13)
1. a gamma ray imaging detector, is characterized in that, comprising:
Scintillation crystal array, described scintillation crystal array comprises continuous crystal unit and multiple discrete crystal unit, and described multiple discrete crystal unit is connected successively, and described multiple discrete crystal unit is located at the outside of described continuous crystal unit; With
Photodetector, described photodetector is located at the side of described scintillation crystal array, and described photodetector is coupled with described scintillation crystal array.
2. gamma ray imaging detector according to claim 1, is characterized in that, described multiple discrete crystal unit joins end to end and successively around the arranged outside of described continuous crystal unit.
3. gamma ray imaging detector according to claim 1, is characterized in that, described multiple discrete crystal unit is included in perpendicular to the many rows on the direction of a side surface of described photodetector.
4. gamma ray imaging detector according to claim 1, is characterized in that, described multiple discrete crystal unit is included in from being close to the center of described continuous crystal unit towards the multilayer the direction at the center away from described continuous crystal unit.
5. the gamma ray imaging detector according to claim 3 or 4, is characterized in that, two often adjacent row or two-layer described discrete crystal unit alternative arrangement, and the material of described multiple discrete crystal unit is all identical.
6. the gamma ray imaging detector according to claim 3 or 4, is characterized in that, two often adjacent rows or two-layer described discrete crystal unit correspondence are arranged, and the material of described multiple discrete crystal unit is not identical.
7. gamma ray imaging detector according to claim 1, it is characterized in that, the material of described continuous crystal unit and each described discrete crystal unit comprises at least one in bismuth germanium oxide, silicic acid lutetium, yttrium luetcium silicate, gadolinium siliate lutetium, gadolinium siliate, yttrium silicate, barium fluoride, sodium iodide, cesium iodide, lead tungstate, yttrium aluminate, lanthanum bromide, lanthanum chloride, calcium titanium lutetium aluminium, lutetium pyrosilicate, aluminic acid lutetium, iodate lutetium and GAGG respectively.
8. gamma ray imaging detector according to claim 1, is characterized in that, is fixed between often adjacent two described discrete crystal unit by optical cement coupling, and described discrete crystal unit is coupled fixing by optical cement with described continuous crystal unit.
9. gamma ray imaging detector according to claim 1, is characterized in that, is provided with reflectorized material part between adjacent two described discrete crystal unit.
10. gamma ray imaging detector according to claim 1, is characterized in that, described continuous crystal unit is formed as cuboid shape.
11. gamma ray imaging detectors according to claim 1, is characterized in that, each described discrete crystal unit is formed as cuboid shape.
12. 1 kinds of gamma ray imaging detector systems, is characterized in that, comprise multiple gamma ray imaging detector according to any one of claim 1-11.
13. gamma ray imaging detector systems according to claim 12, is characterized in that, described multiple gamma ray imaging detector rings is coiled into circular or polygon ring-type.
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