CN202886612U - Collimator for gamma radioactive-source position indicator - Google Patents
Collimator for gamma radioactive-source position indicator Download PDFInfo
- Publication number
- CN202886612U CN202886612U CN 201220391991 CN201220391991U CN202886612U CN 202886612 U CN202886612 U CN 202886612U CN 201220391991 CN201220391991 CN 201220391991 CN 201220391991 U CN201220391991 U CN 201220391991U CN 202886612 U CN202886612 U CN 202886612U
- Authority
- CN
- China
- Prior art keywords
- fixed head
- gamma
- collimating apparatus
- mounting groove
- scintillation crystal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn - After Issue
Links
Images
Abstract
The utility model discloses a collimator for a gamma radioactive-source position indicator and the collimator comprises a first fixed plate and a second fixed plate capable of transmitting a gamma ray, a shield plate capable of shielding the gamma ray, and a plurality of shield blocks which can shield the gamma ray and are provided with predetermined shapes. A penetrating part for penetrating the shield plate on a front and back direction is formed on the shield plate. The shield plate is mounted between the first fixed plate and the second fixed plate. The plurality of shield blocks are located between the first fixed plate and the second fixed plate according to a predetermined arrangement manner, and are mounted in the penetrating part of the shield plate. According to the collimator provided by the utility model, the plurality of shielding blocks with the predetermined shapes are spliced in the predetermined arrangement manner, then special clearances can be formed in order to allow the gamma ray to pass through and a radiation imaging requirement is realized. As the single small shielding block is low in processing cost, convenient to process and simple in technology, manufacturing cost of the collimator is greatly reduced.
Description
Technical field
The utility model relates to the gamma ray detection field, especially relates to a kind of collimating apparatus for gamma radioactive source orientator.
Background technology
Traditional collimating apparatus that is used for surveying the gamma ray orientator generally adopts the stereotype of monoblock or tungsten plate to go out the gap of collimating apparatus through electrosparking, and the processing mode cost of this employing electric spark is high, and processing technology is complicated.In addition, also have in the gap of monoblock tungsten plate punching with the acquisition collimating apparatus, but high in tungsten plate punching price; Stereotype is yielding after the stereotype punching, and drilling precision can not guarantee, affects the collimating apparatus normal operation.
The utility model content
The utility model is intended to solve at least one of technical matters that exists in the prior art.For this reason, a purpose of the present utility model is to propose the low collimating apparatus that is used for gamma radioactive source orientator of a kind of cost.
According to the collimating apparatus for gamma radioactive source orientator of the present utility model, comprising: the first fixed head of transmissive gamma ray and the second fixed head; The barricade of maskable gamma ray, the central authorities of described barricade are formed with the breakthrough part that connects described barricade at fore-and-aft direction, and wherein said barricade is located between described the first and second fixed heads; Maskable gamma ray and have a plurality of shielding slabs of reservation shape, described a plurality of shielding slabs are positioned between described the first and second fixed heads according to predetermined arrangement mode and are positioned at the breakthrough part of described barricade.
Traditional collimating apparatus generally is made of two fixed heads and the monoblock tungsten plate that is located between two fixed heads, wherein monoblock tungsten plate forms specific space so that ray passes through through electric spark technique or hole knockout, but hole knockout and electric spark process costs are high, according to collimating apparatus of the present utility model, after being arranged splicing according to predetermined way, a plurality of shielding slabs with reservation shape can form specific space so that gamma ray passes through, realize the radiant image requirement, because single little shielding slab processing cost is low, and easy to process, technique is simple, thereby greatly reduces the manufacturing cost of collimating apparatus.
In addition, according to the collimating apparatus for gamma radioactive source orientator of the present utility model, can also have following additional technical feature:
Be formed with a plurality of first mounting grooves identical with described a plurality of shielding slab arrangement modes on the rear surface of described the first fixed head, be formed with a plurality of the second mounting grooves corresponding with described a plurality of the first mounting groove positions on fore-and-aft direction on the front surface of described the second fixed head, wherein each described shielding slab all is located between described the first mounting groove and second mounting groove corresponding with it.
By the first mounting groove and the second mounting groove are set, shielding slab can be located at the first mounting groove and accordingly between the second corresponding with it on fore-and-aft direction mounting groove, thereby realize the location to shielding slab, and adopt the groove structure of this front and back correspondence can be more effective and fixed mask piece more securely.
Each described first mounting groove is with identical with its corresponding shielding slab shape, and each described second mounting groove and on fore-and-aft direction the first mounting groove shape corresponding with it just as.Thus, shielding slab can be better fitted with the perisporium of the first mounting groove and the perisporium of the second mounting groove, thus make the first mounting groove and the second mounting groove better, more firm and more accurately shielding slab is accurately located.
Each described shielding slab bonds by cementing agent respectively and between the first mounting groove corresponding with it and the second mounting groove.Thus, improved on the one hand the positioning intensity of shielding slab between the first fixed head and the second fixed head, prevent that the shielding slab dislocation from affecting the collimating apparatus normal operation, on the other hand, can effectively reduce the groove depth of the first mounting groove and the second mounting groove, the processing of convenient the first mounting groove and the second mounting groove reduces difficulty of processing, thereby greatly enhances productivity.
Be formed with a plurality of mounting grooves identical with described a plurality of shielding slab arrangement modes on the rear surface of described the first fixed head, described a plurality of shielding slabs are located at respectively between the front surface of described a plurality of mounting groove and described the second fixed head correspondingly.
Described the first fixed head is made by organic glass or plastics, and described the second fixed head is made by organic glass or plastics.
Described the first fixed head and described the second fixed head are bonded on the front surface and rear surface of described barricade by cementing agent respectively.Thus, can guarantee to greatest extent that permeation parts is that the specific gap radiant transmittance that limits of a plurality of shielding slabs is consistent.
Pass through the screw fastening of a plurality of transmissive gamma rays between described the first fixed head and described the second fixed head.
Described screw is plastic screw.
Described shielding slab is tungsten piece, tungalloy piece, lead or lead alloy piece; Described barricade is tungsten plate, tungalloy plate, stereotype or lead alloy plate.
According to the collimating apparatus for gamma radioactive source orientator of the present utility model, by a plurality of shielding slabs being spliced according to predetermined arrangement mode and being positioned between the first fixed head and the second fixed head, thereby form the required specific space of collimating apparatus, realize the requirement of radiant image, processing the required space of formation with traditional monoblock tungsten plate through special process compares, the little shielding slab of single processing effectively reduces cost, and processing technology is simple, convenient, has improved production efficiency.
In addition, select tungsten or tungalloy can improve the shield effectiveness of collimating apparatus as shielding material, and can also improve the retentivity of precision after the shielding slab machine-shaping, be difficult for deforming, thus convenient for assembly, improve efficiency of assembling, reduce workman's labour intensity.
Additional aspect of the present utility model and advantage in the following description part provide, and part will become obviously from the following description, or recognize by practice of the present utility model.
Description of drawings
Above-mentioned and/or additional aspect of the present utility model and advantage are from obviously and easily understanding becoming the description of embodiment in conjunction with following accompanying drawing, wherein:
Fig. 1 is the front view of gamma camera;
Fig. 2 is the left view of gamma camera;
Fig. 3 is along the cut-open view of A-A among Fig. 2;
Fig. 4 is the rear view of gamma camera;
Fig. 5 is along the cut-open view of B-B among Fig. 4;
Fig. 6 is along the cut-open view of C-C among Fig. 5;
Fig. 7 is the partial enlarged drawing of the gamma camera shown in Fig. 5;
Fig. 8 is the rear view of collimating apparatus;
Fig. 9 is along the cut-open view of D-D among Fig. 8;
Figure 10 is along the cut-open view of E-E among Fig. 9;
Figure 11 is the front view of barricade;
Figure 12 is the front view of collimating apparatus;
Figure 13 is the side view of collimating apparatus;
Figure 14 is the rear view of the first fixed head;
Figure 15 is the vertical view of the first fixed head;
Figure 16 is the front view of the second fixed head;
Figure 17 is the enlarged drawing that Figure 16 centre circle shows F section;
Figure 18 is the vertical view of the second fixed head;
Figure 19 is the synoptic diagram after a plurality of shielding slabs are arranged according to predetermined arrangement mode;
Figure 20 is a kind of mounting structure of shielding slab;
Figure 21 is the another kind of installing mechanism of shielding slab;
Figure 22 is the enlarged drawing of the detector assembly shown in Fig. 5;
Figure 23 is the vertical view of detector assembly;
Figure 24 is the cut-open view of scintillation crystal and position sensitive photo-multiplier tube and mount pad;
Figure 25 is the enlarged drawing that Figure 24 centre circle shows G section;
Figure 26 is along the cut-open view of H-H among Figure 24;
Figure 27 is the method flow diagram of making detector assembly;
Figure 28 is the cut-open view of positioning component;
Figure 29 is along the cut-open view of I-I among Figure 28;
Figure 30 is along the cut-open view of J-J among Figure 28;
Figure 31 is the front perspective view of gamma radioactive source orientator;
Figure 32 is the rear perspective view of gamma radioactive source orientator; With
Figure 33 is the cut-open view of gamma radioactive source orientator.
Embodiment
The below describes embodiment of the present utility model in detail, and the example of described embodiment is shown in the drawings, and wherein identical or similar label represents identical or similar element or the element with identical or similar functions from start to finish.Be exemplary below by the embodiment that is described with reference to the drawings, be intended to for explaining the utility model, and can not be interpreted as restriction of the present utility model.
In description of the present utility model, it will be appreciated that, term " " center "; " vertically "; " laterally "; " length "; " width "; " thickness ", " on ", D score, " front ", " afterwards ", " left side ", " right side ", " vertically ", " level ", " top ", " end " " interior ", " outward ", " clockwise ", orientation or the position relationship of indications such as " counterclockwise " are based on orientation shown in the drawings or position relationship, only be for convenience of description the utility model and simplified characterization, rather than device or the element of indication or hint indication must have specific orientation, with specific orientation structure and operation, therefore can not be interpreted as restriction of the present utility model.
In addition, term " first ", " second " only are used for describing purpose, and can not be interpreted as indication or hint relative importance or the implicit quantity that indicates indicated technical characterictic.Thus, one or more these features can be expressed or impliedly be comprised to the feature that is limited with " first ", " second ".In description of the present utility model, the implication of " a plurality of " is two or more, unless clear and definite concrete restriction is arranged in addition.
In the utility model, unless clear and definite regulation and restriction are arranged in addition, broad understanding should be done in the terms such as term " installation ", " linking to each other ", " connection ", " fixing ", for example, can be to be fixedly connected with, and also can be to removably connect, or connect integratedly; Can be mechanical connection, also can be to be electrically connected; Can be directly to link to each other, also can indirectly link to each other by intermediary, can be the connection of two element internals.For the ordinary skill in the art, can understand as the case may be the concrete meaning of above-mentioned term in the utility model.
In the utility model, unless clear and definite regulation and restriction are arranged in addition, First Characteristic Second Characteristic it " on " or D score can comprise that the first and second features directly contact, can comprise that also the first and second features are not directly contacts but by the other feature contact between them.And, First Characteristic Second Characteristic " on ", " top " and " above " comprise First Characteristic directly over Second Characteristic and oblique upper, or only represent that the First Characteristic level height is higher than Second Characteristic.First Characteristic Second Characteristic " under ", " below " and " below " comprise First Characteristic under the Second Characteristic and tiltedly, or only represent that the First Characteristic level height is less than Second Characteristic.
Describe the gamma camera 100 that is used for gamma ray orientator 1000 below with reference to Fig. 1-Figure 30, gamma camera 100 can be searched the gamma radioactive source in the visual field and radioactive source accurately located.
Such as Fig. 1-shown in Figure 4, gamma camera housing 1 maskable visible light, has accommodating chamber 11 in the gamma camera housing 1, gamma camera housing 1 is configured to maskable gamma camera housing about 1, up and down with the gamma ray at rear and allow gamma ray transmissive gamma camera housing 1 from the 1 front side incident of gamma camera housing to enter in the accommodating chamber 11, that is to say, gamma ray can only enter in the gamma camera housing 1 from the front side, all can be masked by gamma camera housing 1 from the gamma ray of other direction incident.
Such as Fig. 3, Fig. 5, Fig. 8-shown in Figure 21, collimating apparatus 2 transmissives or shielding gamma ray, collimating apparatus 2 is located at the front side of accommodating chamber 11, wherein from the 1 front side transmission of gamma camera housing enter in the accommodating chamber 11 gamma ray transmissive collimating apparatus 2 or by collimating apparatus 2 shieldings.Specifically, gamma ray can only enter into from the front side of gamma camera housing 1 in the accommodating chamber 11, this part enters into gamma ray full illumination in the accommodating chamber 11 on collimating apparatus 2, and wherein the penetrable collimating apparatus 2 of a part of gamma ray and a remaining part are masked to satisfy the requirement of radiant image by collimating apparatus 2.
Such as Figure 22-shown in Figure 30, detector assembly 3 assemblies are located in the accommodating chamber 11, and detector assembly 3 is positioned at the rear side of described collimating apparatus 2 and spaced a predetermined distance to survey by the gamma ray after collimating apparatus 2 transmissions with described collimating apparatus 2.Specifically, after the gamma ray transmissive collimating apparatus 2, receive gamma ray and carry out rough handling by the detector assembly 3 that is positioned at collimating apparatus 2 rear sides, then the data message after will processing feeds back to that the host computer (scheming not shown) of gamma radioactive source orientator 1000 is analyzed, computing, and finally determines the positional information of radioactive source.
Describe gamma camera housing 1 in detail below with reference to Fig. 1-Fig. 7.
Such as Fig. 1, Fig. 4-shown in Figure 6, gamma camera housing 1 comprises all wallboards, front shroud 12 and back shroud 13, wherein all wallboard maskable visible lights and gamma ray, and the both sides, front and back of all wallboards are all opened wide, that is to say the frame shape structure that connects before and after all wallboards form.Back shroud 13 maskable visible light and gamma rays, back shroud 13 are located at the rear end of all wallboards and seal the rear side of all wallboards.Front shroud 12 transmissive gamma rays and maskable visible light, front shroud 12 are located at the front end of all wallboards and seal the front side of all wallboards, and wherein accommodating chamber 11 is limited jointly by front shroud 12, back shroud 13 and all wallboards.
Particularly, as shown in Figure 4 and Figure 5, back shroud 13 comprises the first back shroud 131 and the second back shroud 132, the second back shrouds, 132 maskable visible lights and gamma ray and is located on the inside surface of the first back shroud 131 that namely the second back shroud 132 is located at the inboard of the first back shroud 131.
As shown in Figure 6, all wallboards comprise on first coaming plate 142, the first left side coaming plate 151 and the second left side coaming plate 152, the first right side coaming plate 161 and the second right side coaming plate 162 and first time coaming plate 171 and second time coaming plate 172 on the coaming plate 141 and second.
Wherein, coaming plate 142 maskable visible lights and gamma ray and be located on the inside surface of coaming plate 141 on first on second, namely coaming plate 142 is located at the inboard of coaming plate 141 on first on second.The second left side coaming plate 152 maskable visible lights and gamma ray and be located on the inside surface of the first left side coaming plate 151, namely the second left side coaming plate 152 is located at the inboard of the first left side coaming plate 151.The second right side coaming plate 162 maskables can and be located on the inside surface of the first right side coaming plate 161 light and gamma ray, and namely the second right side coaming plate 162 is located at the inboard of the first right side coaming plate 161.Second time coaming plate 172 maskable visible light and gamma ray and be located on the inside surface of first time coaming plate 171, namely second time coaming plate 172 is located at the inboard of first time coaming plate 171, wherein the two ends, the left and right sides of coaming plate 141 removably link together with the upper end of the first left side coaming plate 151 and the upper end of the first right side coaming plate 161 respectively on first, for example pass through a plurality of screw fastenings, and the two ends, the left and right sides of first time coaming plate 171 link together removably with the lower end of the first left side coaming plate 151 and the lower end of the first right side coaming plate 161 respectively.
Preferably, each screw place all can be provided with O-ring seals.More preferably, can be provided with rubber blanket between coaming plate 141 and the first left side coaming plate 151 and the first right side coaming plate 161 on first, first time coaming plate 171 and the first left side coaming plate 151 and the first right side coaming plate 161.Thus, be conducive on the one hand blind to increase the light sealing effectiveness of gamma camera housing 1, on the other hand, can increase the water resistance of gamma camera housing 1, make gamma camera 100 can adapt to abominable working environment, improve the scope of application of gamma camera 100.
Preferably, coaming plate 141, the first left side coaming plate 151, the first right side coaming plate 161, first time coaming plate 171 are aluminium sheet on the first back shroud 131, first.Thus, guaranteeing that gamma camera housing 1 has under the prerequisite of certain physical strength, has alleviated the weight of gamma camera housing 1 to greatest extent.Preferably, front shroud 12 can be plastic plate, and the dumb light of spray black lacquer.Preferably, coaming plate 142, the second left side coaming plate 152, the second right side coaming plate 162 and second time coaming plate 172 are the lead-antimony alloy plate on the second back shroud 132, second.Thus, can effectively shield gamma camera housing about 1, up and down with the gamma ray at rear, prevent interference measurement results.Alternatively, coaming plate 142, the second left side coaming plate 152, the second right side coaming plate 162 and second time coaming plate 172 also can be stereotype on the second back shroud 132, second.
But wherein on the second back shroud 132, second on the inside surface of coaming plate 142, the second left side coaming plate 152, the second right side coaming plate 162 and second time coaming plate 172 dumb light of spray black lacquer with the light sealing of further raising gamma camera housing 1, prevent that visible light from entering into the accommodating chamber 1 interior detector assembly 3 that affects and working, and then affect the bearing accuracy of radioactive source.
Describe collimating apparatus 2 in detail below with reference to Fig. 3, Fig. 5, Fig. 7-Figure 21, collimating apparatus 2 can be used in the gamma radioactive source orientator 1000, realizes radiant image.
The first fixed head 21 transmissive gamma rays that is to say, penetrable the first fixed head 21 of gamma ray is such as Figure 14 and shown in Figure 15.The second fixed head 22 transmissive gamma rays that is to say that gamma ray can pass the second fixed head 22, such as Figure 16 and shown in Figure 180.Wherein, the concrete shape of the first fixed head 21 and the second fixed head 22 does not have specific (special) requirements, and it can be the rectangular slab shown in Figure 14 and Figure 16.Certainly, the first fixed head 21 and the second fixed head 22 also can be plate for example polygon, circle or the elliptical flat-plates (scheming not shown) of other shape, and its concrete shape can arrange according to the actual installation needs.
Such as Fig. 3, Figure 10-shown in Figure 11, barricade 23 maskable gamma rays, the central authorities of barricade 23 are formed with the breakthrough part 231 that connects barricade 23 at the fore-and-aft direction direction of paper (among Fig. 3, Figure 10 and the Figure 11 perpendicular to), for example in the example of Figure 11, breakthrough part 231 can form rectangle, barricade 23 can correspondence form rectangular box-like, wherein barricade 23 is located between the first fixed head 21 and the second fixed head 22, in other words, the first fixed head 21 is located on the front surface of barricade 23, and the second fixed head 22 is located on the rear surface of barricade 23.The size of barricade 23 and the first fixed head 21 and the second fixed head 22 does not have specific (special) requirements, that is to say, the size of barricade 23 can be greater than the first fixed head 21 and the second fixed head 22, perhaps equate with the first fixed head 21 and the second fixed head 22 sizes, can certainly be less than the size of the first fixed head 21 and the second fixed head 22, its size can arrange according to the actual installation needs.For example in an example of the present utility model, as shown in Figure 9, the size of barricade 23 is slightly larger than the size of the first fixed head 21 and the second fixed head 22.
Such as Fig. 3, Figure 10 and shown in Figure 19, shielding slab 24 maskable gamma rays and have reservation shape, the square shielding slab 24 shown in Figure 19, rectangular shield piece 24 etc.A plurality of shielding slabs 24 are positioned between the first fixed head 21 and the second fixed head 22 according to predetermined arrangement mode and are positioned at the breakthrough part 231 of barricade 23, and the spread pattern of shielding slab 24 as shown in figure 19.Here, need to prove, the shape of shielding slab 24 and arrangement mode calculate according to special algorithm in advance so that collimating apparatus 2 meets the radiant image requirement, be prior art about the shape of calculating shielding slab 24 and the algorithm of arrangement mode, and known by the one of ordinary skilled in the art, be not described in detail here.
In other words, a plurality of shielding slabs 24 with reservation shape are fixed between the first fixed head 21 and the second fixed head 22 according to predetermined arrangement mode, and each shielding slab 24 all is positioned at breakthrough part 231, form so specific space between barricade 23 and a plurality of shielding slab 24, as shown in figure 19, gamma ray can pass these specific spaces, and for barricade 23 being arranged or the position of shielding slab 24 being arranged, gamma ray then can not pass through, that is to say, after the gamma ray of radiographic source radiation penetrates the first fixed head 21, penetrable in above-mentioned specific space and from the second fixed head 22, pass, perhaps conductively-closed piece 24 or barricade 23 mask, thereby realize radiant image.
In brief, after shielding slab 24 by will having reservation shape is arranged according to predetermined way, it is identical with traditional monoblock tungsten plate formed specific space after electric spark or drilling technology aftertreatment on the function, because single little shielding slab 24 sizes are less, therefore can adopt wire cutting technology that shielding slab 24 is processed, not only simplified processing technology, convenient production, the more important thing is that processing these little shielding slabs 24 compares with adopting electric spark processes monoblock tungsten plate, can greatly reduce cost, thereby reduce to greatest extent collimating apparatus 2 production and processing costs.
Traditional collimating apparatus 2 generally is made of two fixed heads and the monoblock tungsten plate that is located between two fixed heads, wherein monoblock tungsten plate forms specific space so that ray passes through through electric spark technique or hole knockout, but hole knockout and electric spark process costs are high, collimating apparatus 2 in the utility model, after being arranged splicing according to predetermined way, a plurality of shielding slabs 24 with reservation shape can form specific space so that gamma ray passes through, realize the radiant image requirement, because single little shielding slab 24 processing costs are low, and easy to process, technique is simple, thereby greatly reduces the manufacturing cost of collimating apparatus 2.
As shown in Figure 7 and Figure 8, particularly, be formed with a plurality of first mounting grooves 211 identical with a plurality of shielding slab 24 arrangement modes on the rear surface of the first fixed head 21, be formed with on fore-and-aft direction a plurality of second mounting grooves 221 corresponding with a plurality of the first mounting grooves 211 on the front surface of the second fixed head 22, wherein each shielding slab 24 all is located between the first mounting groove 211 and second mounting groove 221 corresponding with it.
Thus, shielding slab 24 can be located at the first mounting groove 211 and accordingly between the second corresponding with it on fore-and-aft direction mounting groove 221, thereby realize the location to shielding slab 24, and the groove structure that adopts this front and back correspondence can be more effective and fixed mask piece 24 more securely, prevent that shielding slab 24 from use moving with respect to barricade 23, affect collimating apparatus 2 normal operations.
Such as Figure 14, Figure 16 and shown in Figure 19, preferably, each first mounting groove 211 is with identical with its corresponding shielding slab 24 shapes, namely when 24 one-tenth less of shielding slabs square, the first corresponding mounting groove 211 also is less square groove, similarly, and when shielding slab 24 is orthogonal, the first corresponding mounting groove 211 forms rectangular channel, such as Figure 14 and shown in Figure 19.Each second mounting groove 221 is with identical with its corresponding the first mounting groove 211 shapes on fore-and-aft direction, such as Figure 14 and shown in Figure 16.More preferably, the size of each shielding slab 24 and first mounting groove 211 corresponding with it is also roughly the same.
In other words, the first mounting groove 211 with the first fixed head 21(or the second fixed head 22) projection in the parallel plane is with identical with the shape of its projection of corresponding shielding slab 24 in this plane, and the second projection of mounting groove 221 in this plane with and also identical in the shape of the first corresponding on the fore-and-aft direction projection of mounting groove 211 in this plane.Thus, shielding slab 24 can be better fitted with the perisporium of the first mounting groove 211 and the perisporium of the second mounting groove 221, thus make the first mounting groove 211 and the second mounting groove 221 better, more firm and more accurately shielding slab 24 is accurately located.
Preferably, each shielding slab 24 bonds by cementing agent respectively and between the first mounting groove 211 corresponding with it and the second mounting groove 221, that is to say that the rear and front end of each shielding slab 24 is bonded in respectively in the first mounting groove 211 and the second mounting groove 221 accordingly.Thus, improved on the one hand the constant intensity of shielding slab 24 between the first fixed head 21 and the second fixed head 22, prevent that shielding slab 24 dislocation from affecting collimating apparatus 2 normal operations, on the other hand, can effectively reduce the groove depth of the first mounting groove 211 and the second mounting groove 221, the processing of convenient the first mounting groove 211 and the second mounting groove 221 reduces difficulty of processing, thereby greatly enhances productivity.
Wherein alternatively, such as Figure 14 and shown in Figure 15, the first mounting groove 211 and the first fixed head 21 can be integrally formed, for example, can carry out milling process to process the first mounting groove 211 to the presumptive area of the first fixed head 21.Because the first mounting groove 211 that is processed into through milling process can form fillet, thus can before milling process, process in advance back chipping hole 25 in corresponding interior angle position, thus guarantee that shielding slab 24 is in place, improve assembly precision.Further alternatively, the first fixed head 21 and the first mounting groove 211 also can adopt mould production.
Equally alternatively, such as Figure 16-shown in Figure 180, the second mounting groove 221 and the second fixed head 22 can be integrally formed, for example, can carry out milling process to process the second mounting groove 221 to the presumptive area of the second fixed head 22.Because the second mounting groove 221 that is processed into through milling process can form fillet, thus can before milling process, process in advance back chipping hole 25 in corresponding interior angle position, thus guarantee that shielding slab 24 is in place, further improve assembly precision.Further alternatively, the second fixed head 22 and the second mounting groove 221 also can adopt mould production.
In embodiment more of the present utility model, the first fixed head 21 can be made by organic glass or plastics, that is to say, the first fixed head 21 can be poly (methyl methacrylate) plate, and certain the first fixed head 21 also can be plastic plate, does not namely affect gamma ray transmissive and gets final product.Similarly, the second fixed head 22 is made by organic glass or plastics, that is to say, the second fixed head 22 can be poly (methyl methacrylate) plate, and certain the second fixed head 22 also can be plastic plate, does not namely affect gamma ray transmissive and gets final product.
Such as Fig. 8, Fig. 9, shown in Figure 12, can be fastening by the screw 26 of a plurality of transmissive gamma rays between the first fixed head 21 and the second fixed head 22, each screw 26 all passes shielding slab 24 by the rear specific space that limits of predetermined way splicing, in order to the first fixed head 21, barricade 23 and the second fixed head 22 are assembled together.Wherein the quantity of screw 26 and assembling spread pattern do not have specific (special) requirements.Alternatively, screw 26 is plastic screw.Be understandable that all can be used for making screw 26 for the material of other transmissive gamma ray, for example screw 26 also can be made by organic glass.
Preferably, also can be bonded together by cementing agent between the first fixed head 21, the second fixed head 22 and the barricade 23, particularly, the first fixed head 21 is bonded on the front surface of barricade 23 and the second fixed head 22 is bonded on the rear surface of barricade 23 by cementing agent by cementing agent.Thus, can guarantee to greatest extent that permeation parts is that the specific gap radiant transmittance that limits of a plurality of shielding slabs 24 is consistent, improves the bearing accuracy of gamma radioactive source orientator 1000.
Because tungsten hardness is high, and is good to the shielding of ray, and precision easily keeps after the machine-shaping, be not easy distortion, therefore, preferably, shielding slab 24 is the tungsten piece, barricade 23 is the tungsten plate.Not only make things convenient for thus the production and processing of shielding slab 24, for example can adopt wire cutting technology that the tungsten piece is processed, effectively reduce cost, and guaranteed machining precision, simultaneously because the tungsten high strength and deformation, also greatly facilitate the assembling of a plurality of tungsten pieces, and can shield better ray, guarantee collimating apparatus 2 efficient operation.Certainly, shielding slab 24 and barricade 23 also can adopt tungalloy to make, and that is to say, shielding slab 24 is the tungalloy shielding slab, and barricade 23 is the tungalloy barricade.
Certainly, the utility model be not limited to this, in other embodiment of the present utility model, shielding slab 24 and barricade 23 also can adopt lead or lead alloy to make.That is to say that shielding slab 24 also can be lead, barricade 23 can be stereotype, and perhaps shielding slab 24 is lead alloy shielding slabs, and barricade 23 corresponds to the lead alloy barricade.
Figure 21 shows the structure of the collimating apparatus 2 of another embodiment of the utility model, wherein shows particularly another assembling mode of a plurality of shielding slabs 24 and the first fixed head 21 and the second fixed head 22.
As shown in figure 21, in the present embodiment, be formed with a plurality of mounting grooves 211 ' identical with a plurality of shielding slab 24 arrangement modes on the rear surface of the first fixed head 21, a plurality of shielding slabs 24 are located between the front surface of a plurality of mounting grooves 211 ' and the second fixed head 22 correspondingly.This moment is in order to be fixed on shielding slab 24 better between the first fixed head 21 and the second fixed head 22, the groove depth of mounting groove 211 ' can suitably be deepened, and also can be bonded in by cementing agent on the front surface of mounting groove 211 ' and the second fixed head 22 at the two ends of shielding slab 24 simultaneously.
The difference of present embodiment and above-described embodiment only is, only have on the first fixed head 21 and be provided with a plurality of mounting grooves 211 ', and the second fixed head 22 does not process, be understandable that, the structure of the collimating apparatus 2 in the present embodiment, the shape of each parts and/or material etc. all can with above-described embodiment in adopt identical setting, for example the first fixed head 21 and the second fixed head 22 can be poly (methyl methacrylate) plates, it can certainly be plastic plate, the first fixed head 21, barricade 23 and the second fixed head 22 can adopt a plurality of screw fastenings of transmissive gamma ray, certainly also can adopt the mode of cementing agent adhesion to fix, can with reference to the description in above-described embodiment, no longer describe in detail here for these identical settings.
Certainly, be understandable that, a plurality of mounting grooves 211 ' also can be formed on the rear surface of the second fixed head 22 according to predetermined arrangement mode, this moment, the first fixed head 21 did not process, be that a plurality of shielding slabs are positioned between the rear surface of a plurality of mounting grooves 211 ' and the first fixed head 21 for 24 this moments, scheme not shown.
Such as Fig. 5 and shown in Figure 7, in order better collimating apparatus 2 to be fixed in the accommodating chamber 11, the lower surface of coaming plate 142 is provided with fixedly aluminium sheet 111 on second, upper fixedly aluminium sheet 111 can be located at the middle front part of coaming plate 142 lower surfaces on second, the front surface of upper fixedly aluminium sheet 111 is preferably concordant with the front surface of coaming plate 142 on second, accordingly, the upper surface of second time coaming plate 172 is provided with lower fixedly aluminium sheet 112, lower fixedly aluminium sheet 112 can be located at the middle front part of second time coaming plate 172 upper surface, the front surface of lower fixedly aluminium sheet 112 is preferably concordant with the front surface of second time coaming plate 172, that is to say, lower fixedly aluminium sheet 112 can with the corresponding setting on above-below direction of upper fixedly aluminium sheet 111.
Wherein, coaming plate 142 is fixing on the upper fixedly aluminium sheet 111 preferred employing cementing agents and second, for example adopts the high duty metal adhesive, similarly, lower fixedly aluminium sheet 112 preferred cementing agent and second time coaming plate 172 of adopting are fixed, and for example also can adopt the high duty metal adhesive.Such as Fig. 5 and shown in Figure 7, be respectively arranged with corresponding up and down collimator positioner boss 113 on the lower surface of upper fixedly aluminium sheet 111 and the upper surface of lower fixedly aluminium sheet 112, collimating apparatus 2 is located at front side and the rear surface of accommodating chamber 11 and ends the collimator positioner boss 113 that supports on upper fixedly aluminium sheet 111 and the lower fixedly aluminium sheet 112, wherein front shroud 12 is located at the front end of all wallboards, the rear surface of front shroud 12 compresses collimating apparatus 2, and front shroud 12 and collimator positioner boss 113 realize that collimation device 2 axially is the location of fore-and-aft direction thus.In addition, the outer peripheral face of collimating apparatus 2 and the inner peripheral surface of all wallboards can fit namely with second on coaming plate 142, the second left side coaming plate 152, the second right side coaming plate 162 and second time coaming plate 172 fit, realize thus collimating apparatus 2 radially namely about, the location of left and right directions.
In addition, traditional collimating apparatus 2 in order to guarantee assembly precision, often need to adopt computing machine location and experiment location, and positioning experiment needs radioactive source in assembling process.In the utility model, by collimator positioner boss 113 is set, can realize the accurate location of collimating apparatus 2, can omit the process of computing machine location and experiment location.Be understandable that the locator meams of collimating apparatus 2 is not limited to aforesaid way, for example collimating apparatus 2 also can be fixed by screws in the accommodating chamber 11 to realize the location.
In addition, select tungsten or tungalloy can improve the shield effectiveness of collimating apparatus 2 as shielding material, and can also improve the retentivity of precision after shielding slab 24 machine-shapings, be difficult for deforming, thus convenient for assembly, improve efficiency of assembling, reduce workman's labour intensity.
Describe detector assembly 3 in detail below with reference to Fig. 5, Fig. 7, Figure 22-Figure 26.
Such as Figure 22 and shown in Figure 23, scintillation crystal 32 is located on the mount pad 31, and scintillation crystal 32 can discharge visible light after absorbing gamma energy, and more particularly, scintillation crystal 32 can discharge visible light penetrate the gamma ray of collimating apparatus 2 in absorption after.Position sensitive photo-multiplier tube 33 is located on the rear surface of scintillation crystal 32, and position sensitive photo-multiplier tube 33 and scintillation crystal 32 optically-coupled are absorbing the visible light that sends behind the gamma energy and described visible light is converted to electric signal to receive scintillation crystal 32.
Such as Fig. 5 and shown in Figure 7, shading piece 34 is located at the front side of mount pad 31 and covers the front surface of scintillation crystal 1, shading piece 34 transmissive gamma rays, that is to say, from the penetrable shading piece 34 of the gamma ray of detector assembly 3 front side incidents and penetrate on scintillation crystal 32, and can not see through shading piece 34 from the visible light of detector assembly 3 front side incidents.Since scintillation crystal 32 absorb the brightness of the visible light that sends behind the gamma energies may be a little less than, therefore the visible light that shading piece 34 covers front side incident is set can make position sensitive photo-multiplier tube 33 receive better the visible light that scintillation crystal 32 sends, prevent that visible light direct irradiation from front side incident is in position sensitive photo-multiplier tube 33, interference measurement results.
Such as Figure 22 and shown in Figure 23, the electric signal that the rear side that Electric signal processing unit 35 is connected to position sensitive photo-multiplier tube 33 sends with the sensitive photomultiplier 33 of receiving position.After receiving described electric signal, Electric signal processing unit 35 can process such as mathematics and digitizing etc. to this electric signal, the host computer that Electric signal processing unit 35 can feed back to the data transmission after processing gamma radioactive source orientator 1000 is realized the accurate location to radioactive source so that data are further analyzed and processed.Electric signal processing unit 35 can be electrically connected by insert row (scheming not shown) with position sensitive photo-multiplier tube 33.
During detector assembly 3 work, at first be radiated on the shading piece 34 from the visible light of detector assembly 3 the place aheads irradiation and through the gamma ray after collimating apparatus 2 transmissions, shading piece 34 maskable visible lights also allow gamma ray transmissive, gamma ray is radiated on the scintillation crystal 32 after penetrating shading piece 34, after absorbing gamma energy, scintillation crystal 32 sends visible light, the position sensitive photo-multiplier tube 33 that is positioned at rear side can be converted to electric signal with visible light after receiving the visible light that scintillation crystals 32 send, electric signal can transfer to Electric signal processing unit 35 by insert row, data feedback after Electric signal processing unit 35 can be processed and will process this electric signal is transferred to host computer so that data are further analyzed and processed, and finally passes through the analyzing and processing realization of host computer to the accurate location of radioactive source.
In an embodiment of the present utility model, such as Figure 22 and shown in Figure 23, Electric signal processing unit 35 comprises signal transducer 351, front amplifying board 352 and analog to digital conversion plate 351, wherein signal transducer 351 is connected to the rear side of position sensitive photo-multiplier tube 33, and the major function of signal transducer 351 is that the current signal that position sensitive photo-multiplier tube 33 is exported is converted to voltage signal and realizes the analog weighted of signal.Front amplifying board 352 is connected to the rear side of signal transducer 351, and the major function of front amplifying board 352 is that simulating signal is amplified and modulation treatment.Analog to digital conversion plate 351 is connected to the rear side of front amplifying board 352, and the major function of analog to digital conversion plate 351 is to transfer to host computer with analog signal figure and by Ethernet.
Such as Figure 22 and shown in Figure 23, wherein can link together by a plurality of hexagonal copper posts 37 between signal transducer 351, front amplifying board 352 and the analog to digital conversion plate 351, for example individual in the example of Figure 22 and Figure 23, connect together by four hexagonal copper posts 37 between change-over panel 351, front amplifying board 352 and the analog to digital conversion plate 351.Can be electrically connected by insert row between signal transducer 351 and the front amplifying board 352, also can be electrically connected by insert row between front amplifying board 352 and the analog to digital conversion plate 351.
Such as Figure 22 and shown in Figure 23, because position sensitive photo-multiplier tube 33 needs to be electrically connected with transmission of signal with signal transducer 351, impose on the external force of position sensitive photo-multiplier tube 33 in order to reduce signal transducer 351, preferably, Electric signal processing unit 35 integral body can be bolted on the mount pad 31, i.e. Electric signal processing unit 35 and mount pad 31 mechanical connections.By Electric signal processing unit 35 integral body are fixedly mounted on the mount pad 31, thereby the external force that makes signal transducer 351 impose on position sensitive photo-multiplier tube 33 is approximately zero, and preventing from getting loose between position sensitive photo-multiplier tube 33 and the scintillation crystal 32 affects both couplings.In addition, because scintillation crystal 32 adopts the mode of adhesion to fix with position sensitive photo-multiplier tube more than 33, by Electric signal processing unit 35 is fixed on the mount pad 31, it is stressed with position sensitive photo-multiplier tube 33 adhesive surfaces greatly to reduce scintillation crystal 32, impact resistance, the shock resistance of Effective Raise scintillation crystal 32 and position sensitive photo-multiplier tube 33 are so that detector assembly 3 can adapt to worse environment.
As shown in figure 26, the rectangle frame that connects before and after mount pad 31 is configured to that is to say that mount pad 31 forms the general rectangular frame, and described rectangle frame is formed with the breakthrough part that connects rectangle frame central authorities along fore-and-aft direction, and namely breakthrough part is limited by four frames of rectangle frame.Wherein, be formed with respectively at least one through hole 311 on two frames of the arbitrary neighborhood of rectangle frame, further, detector assembly 3 also comprises a plurality of trip bolts 312, a plurality of trip bolts 312 are positioned on the sidewall of rectangle frame with scintillation crystal 32 and the position sensitive photo-multiplier tube 33 that will be positioned at rectangle frame by the through hole 311 on two frames respectively accordingly, namely realize the location of scintillation crystal 32, position sensitive photo-multiplier tube 33 and mount pad 31.
Specifically, as shown in figure 26, be respectively arranged with two through holes 311 on the left frame of rectangle frame and the lower frame, have more terrain theory, through hole 311 is threaded hole, through hole 311 runs through corresponding frame along perpendicular direction ground from outside to inside, trip bolt 312 difference threaded engagement are in through hole 311, trip bolt 312 can inwardly screw in through hole 311 so that the tail end of trip bolt 312 only is against on the sidewall of scintillation crystal 32, and then scintillation crystal 32 is fastened on the relative madial wall of rectangle frame, in the example of Figure 26, scintillation crystal 32 is fastened on the inner roof wall and inner right wall of rectangle frame by four trip bolts 312 that pass respectively left frame and lower frame, certainly, scintillation crystal 32 is not limited to this with the locator meams of mount pad 31.Wherein, be understandable that, the quantity of through hole 311 can be more for example three or four on each frame, the quantity that those of ordinary skills can set up through hole 311 according to the size of scintillation crystal 32 physical sizes to be positioning scintillation crystal 32 better, and then realizes the location of scintillation crystal 32, position sensitive photo-multiplier tube 33 and mount pad 31.
Preferably, be provided with crystal pad 313 between the sidewall of the tail end of trip bolt 312 and scintillation crystal 32, crystal pad 313 can be made by polyformaldehyde material, and namely crystal pad 313 is the polyoxymethylene pad.By crystal pad 313 is set; be equivalent to increase the surface area between trip bolt 312 tail ends and scintillation crystal 32 sidewalls; greatly reduce scintillation crystal 32 sidewalls and be subject to the fastening force that trip bolt 312 applies; protection scintillation crystal 32; reduce the damage probability of scintillation crystal 32, thereby effectively save cost.
In order to guarantee the good coupling between scintillation crystal 32 and the position sensitive photo-multiplier tube 33, such as Figure 24 and shown in Figure 25, can be coated with equably optocoupler mixture 38a between scintillation crystal 32 and the position sensitive photo-multiplier tube 33 to improve the coupling of scintillation crystal 32 and position sensitive photo-multiplier tube 33.
Wherein, preferably, optocoupler mixture 38a can be silicone grease.By between scintillation crystal 32 and position sensitive photo-multiplier tube 33, applying silicone grease, can greatly reduce refraction loss and the reflection loss of visible light between scintillation crystal 32 and position sensitive photo-multiplier tube 33 that scintillation crystal 32 sends, thereby improve scintillation crystal 32 and position sensitive photo-multiplier tube 33 coupling so that position sensitive photo-multiplier tube 33 receive better the visible light that scintillation crystal 32 sends and be converted to electric signal, the detection accuracy of Effective Raise detector assembly 3, and because silicone grease does not have cohesiveness, scintillation crystal 32 and position sensitive photo-multiplier tube 33 can not be bonded to one, therefore when scintillation crystal 32 or position sensitive photo-multiplier tube 33 damage, can take scintillation crystal 32 and position sensitive photo-multiplier tube 33 apart the also parts of worse damage easily, further reduce use cost.
Certainly, alternatively, in another embodiment of the present utility model, optocoupler mixture 38a also can be optics cement.By between scintillation crystal 32 and position sensitive photo-multiplier tube 33, optics cement being set, also can improve the coupling of scintillation crystal 32 and position sensitive photo-multiplier tube 33.Because optics cement has cohesiveness, scintillation crystal 32 and position sensitive photo-multiplier tube 33 can be bonded together, therefore can improve the assembling intensity of scintillation crystal 32 and position sensitive photo-multiplier tube 33, prevent that scintillation crystal 32 and position sensitive photo-multiplier tube 33 are in use loosening, affect Effect on Detecting.
Such as Figure 24 and shown in Figure 25, can be bonded together by curable cementing agent 38b between scintillation crystal 32 and the position sensitive photo-multiplier tube 33, preferably, cementing agent 38b can be silicon rubber.Specifically, the periphery of the rear surface of scintillation crystal 32 and position sensitive photo-multiplier tube 33 front ends is smeared silicon rubber along the place.Thus, can with the optocoupler mixture 38a of coating between scintillation crystal 32 and the position sensitive photo-multiplier tube 33 for example the silicone grease shutoff between the front surface of the rear surface of scintillation crystal 32 and position sensitive photo-multiplier tube 33, guarantee the coupling of the two, after silicon rubber solidifies, also realized simultaneously the fixing of scintillation crystal 32 and position sensitive photo-multiplier tube 33.
Such as Figure 24 and shown in Figure 25, detector assembly 3 is because after vibrations or long-time the use, be fixed on position sensitive photo-multiplier tube 33 in the mount pad 31 and scintillation crystal 32 may and mount pad 31 between owing to assemble the not firm relative motion that occurs, therefore in order further to improve the assembling intensity between position sensitive photo-multiplier tube 33 and scintillation crystal 32 and the mount pad 31, preferably, be filled with hot melt adhesive 38c between position sensitive photo-multiplier tube 33 and the scintillation crystal 32 so that position sensitive photo-multiplier tube 33 and scintillation crystal 32 are fixed in the mount pad 31, as shown in figure 25 more securely.
Specifically, such as Figure 24 and shown in Figure 25, hot melt adhesive 38c is filled in the slit of position sensitive photo-multiplier tube 33 and mount pad 31, scintillation crystal 32 is located with the slit of mount pad 31, hot melt adhesive also is sticked together trip bolt 312 and scintillation crystal 32 simultaneously, can greatly improve thus the assembling intensity between position sensitive photo-multiplier tube 33 and scintillation crystal 32 and the mount pad 31, after preventing detector assembly 3 vibrations or long-time the use, the image Effect on Detecting relatively moves between position sensitive photo-multiplier tube 33 and scintillation crystal 32 and the mount pad 31, simultaneously when position sensitive photo-multiplier tube 33 or scintillation crystal 32 damage needs replacing, perhaps when needs reclaim position sensitive photo-multiplier tube 33 or scintillation crystal 32, but the ablation heat melten gel is to take off position sensitive photo-multiplier tube 33 and scintillation crystal 32 from mount pad 31, change the parts that damage or reclaim position sensitive photo-multiplier tube 33 or scintillation crystal 32, easy to operate, practicality is good, and has further reduced cost.
In an embodiment of the present utility model, such as Fig. 5 and shown in Figure 7, shading piece 34 is opaque plastic plate, and for example shading piece 34 can be the acetal plastic plate of black.Certainly, be understandable that shading piece 34 can also be made by the material of other transmissive gamma ray, for example shading piece 34 can be the poly (methyl methacrylate) plate of processing through blacking, for example at the dumb light lacquer of the surface spraying black of organic glass.Shading piece 34 can be by the front side of a plurality of bolted at mount pad 31, and preferably, the axial limiting of scintillation crystal 32 can be fitted to realize with the front surface of scintillation crystal 32 in the rear surface of shading piece 34.More preferably, shading piece 34 can be plastic plate in uneven thickness, specifically, owing to exist the more sensitive zone of gamma ray on the scintillation crystal 32, therefore the part that 34 pairs of shading pieces should the sensitizing range is processed thinner so that gamma ray is seen through of other parts relatively, the raising detection accuracy.
As shown in figure 22, detector assembly 3 also comprises the mount pad mask frame 36 of maskable gamma ray, and mount pad mask frame 36 is located at the rear side of mount pad 31, and mount pad mask frame 36 can be made by lead-antimony alloy.By mount pad mask frame 36 is set, can mask more fully the gamma ray at mount pad 31 rears, thereby the gamma-ray irradiation that prevents mount pad 31 rear sides affects Effect on Detecting on scintillation crystal 32.
Such as Fig. 5 and shown in Figure 7, detector assembly 3 is positioned at the rear side of collimating apparatus 2 and spaced a predetermined distance from collimating apparatus 2, specifically, scintillation crystal 32 in the detector assembly 3 separates specific range with collimating apparatus 2, more particularly, after a plurality of shielding slabs 24 in the collimating apparatus 2 calculated shape and arrangement mode according to specific algorithm, the distance between collimating apparatus 2 and the scintillation crystal 32 also was certain, namely also calculate according to algorithm, thereby satisfy the requirement of radiant image.
Such as Fig. 5 and shown in Figure 7, the up and down two ends of detector assembly 3 are separately fixed at fixedly on the aluminium sheet 111 and lower fixedly aluminium sheet 112.Particularly, the upper surface of the lower surface of upper mounted plate 111 and bottom plate 112 is provided with corresponding up and down detector assembly positioning boss 114, after detector assembly 3 is located by the detector assembly positioning boss 114 on upper mounted plate 111 and the bottom plate 112, can be fastened on respectively on upper mounted plate 111 and the bottom plate 112 by screw, for example by screw mount pad 31 be fastened on upper mounted plate 111 and the bottom plate 112 to realize the assembling of detector assembly 3.Further, also can be provided with fixedly aluminium sheet on the internal face of the second left side coaming plate 152 and the second right side coaming plate 162, and the mount pad 31 of detector assembly 3 also can be by a plurality of screw fastenings on the fixedly aluminium sheet of the second left side coaming plate 152 and the second right side coaming plate 162 internal faces, thereby further improve assembling intensity and the precision of detector assembly 3, prevent that the relative distance between detector assembly 3 and the collimating apparatus 2 from changing, affect detector assembly 3 normal operations.
As shown in Figure 4 and Figure 5, be provided with detector low-pressure connector 133, detector high-voltage power supply socket 134 and detector network socket 135 on the back shroud 13, wherein the Electric signal processing unit 35 of detector assembly 3 can link to each other with detector low-pressure connector 133, detector high-voltage power supply socket 134 and detector network socket 135 respectively.
Describe the manufacture method of detector assembly 3 in detail below with reference to Figure 27.
As shown in figure 27, the manufacture method of detector assembly 3 may further comprise the steps:
S1, between scintillation crystal 32 and position sensitive photo-multiplier tube 33 coating optocoupler mixture;
S2, the front end periphery of position sensitive photo-multiplier tube 33 along and the rear surface of scintillation crystal 32 between smear curable cementing agent;
S3, before described adhesive cures with position sensitive photo-multiplier tube 33 and scintillation crystal 32 pre-determined bit;
S4, after described adhesive cures, position sensitive photo-multiplier tube 33 and the scintillation crystal 32 that obtains among the step S3 is positioned on the mount pad 31;
S5, to the gap filling hot melt adhesive between mount pad and position sensitive photo-multiplier tube 33 and the scintillation crystal 32;
S6, shading piece 34 is assembled to the front side of mount pad 31, Electric signal processing unit 35 is assembled to the rear side of mount pad 31.
Particularly, at first, apply equably the optocoupler mixture between scintillation crystal 32 and position sensitive photo-multiplier tube 33, preferably, the optocoupler mixture can be silicone grease.Smear the coupling that silicone grease can improve scintillation crystal 32 and position sensitive photo-multiplier tube 33, simultaneously because silicone grease does not have cohesiveness, therefore when scintillation crystal 32 or position sensitive photo-multiplier tube 33 damage, can conveniently scintillation crystal 32 be separated and change the parts that damage with position sensitive photo-multiplier tube 33.Alternatively, the optocoupler mixture also can be optics cement, also can increase thus the coupling of scintillation crystal 32 and position sensitive photo-multiplier tube 33, improves Effect on Detecting.
Behind coating optocoupler mixture between scintillation crystal 32 and the position sensitive photo-multiplier tube 33, the front end periphery of position sensitive photo-multiplier tube 33 along and the rear surface of scintillation crystal 32 between smear curable cementing agent so that scintillation crystal 32 and position sensitive photo-multiplier tube 33 are bonded together, preferably, cementing agent can be silicon rubber.
Then, before adhesive cures, with position sensitive photo-multiplier tube 33 and scintillation crystal 32 pre-determined bit to guarantee good optically-coupled between position sensitive photo-multiplier tube 33 and the scintillation crystal 32.After adhesive cures, position sensitive photo-multiplier tube 33 and scintillation crystal 32 are positioned on the mount pad 31, and to the gap filling hot melt adhesive between mount pad 31 and position sensitive photo-multiplier tube 33 and the scintillation crystal 32 so that position sensitive photo-multiplier tube 33 and scintillation crystal 32 are fixed on the mount pad 31.
At last, shading piece 34 is assembled to the front side of mount pad 31, Electric signal processing unit 35 is assembled to the rear side of mount pad 31.
Describe a kind of positioning component 39 of realizing above-mentioned steps S3 in detail below with reference to Figure 28-Figure 30.
Such as Figure 28-shown in Figure 30, positioning component 39 comprises base plate 393, the first rectangle posting 391 and the second rectangle posting 392, wherein the first rectangle posting 391 is located on the upper surface of base plate 393 and has the first breakthrough part of up/down perforation the first rectangle posting 393 central authorities, the horizontal section of the first breakthrough part is substantially orthogonal, wherein the adjacent two side walls of the first breakthrough part forms the first locating surface 394 and the second locating surface 395, as shown in figure 29.The second rectangle posting 392 is located on the upper surface of the first rectangle posting 391 and has the second breakthrough part of up/down perforation the second rectangle posting 392 central authorities, the horizontal section of the second breakthrough part is substantially orthogonal, wherein the adjacent two side walls of the second breakthrough part forms the 3rd locating surface 396 and the 4th locating surface 397, wherein the first locating surface 394 is parallel with the 3rd locating surface 396 and separate the first preset distance, the first locating surface 394 and the 3rd locating surface 396 are positioned at the same side, the second locating surface 395 is parallel with the 4th locating surface 397 and separate the second preset distance, and the second locating surface 395 and the 4th locating surface 397 are positioned at the same side.
Such as Figure 28-shown in Figure 30, positioning component 39 also comprises a plurality of the first dog screws 398 and a plurality of the second dog screw 399, wherein be formed with the through hole that connects corresponding frame on two frames relative with the second locating surface 395 with the first locating surface 394 on the first rectangle posting 391, similarly, also be formed with the through hole that connects corresponding frame on two frames relative with the 4th locating surface 397 with the 3rd locating surface 396 on the second rectangle posting 392.
Before silicon rubber between scintillation crystal 32 and position sensitive photo-multiplier tube 33 solidifies, scintillation crystal 32 and position sensitive photo-multiplier tube 33 are placed in the first rectangle posting 391 and the second rectangle posting 392, the bottom supporting of scintillation crystal 32 is on the upper surface of base plate 393 at this moment, a plurality of the first dog screws 398 pass respectively the through hole on the two adjacent edge frames and inside the screw-in so that the tail end of each the first dog screw 398 ends on 32 liang of adjacent side wall surfaces of scintillation crystal on the first rectangle posting 391, thereby the two side walls that scintillation crystal 32 is relative with a plurality of the first dog screws 398 is pressed on the first locating surface 394 and the second locating surface 395, as shown in figure 29.
Then, pass respectively the through hole on the two adjacent edge frames and inside the screw-in so that the tail end of each the second dog screw 399 ends on 33 liang of adjacent side wall surfaces of position sensitive photo-multiplier tube on the second rectangle posting 392 with a plurality of the second dog screws 399, thereby the two side walls that position sensitive photo-multiplier tube 33 is relative with a plurality of the second dog screws 399 is pressed on the 3rd locating surface 396 and the 4th locating surface 397, as shown in figure 30.
Wherein, need to prove, above-mentioned the first preset distance and the second preset distance are a pre-set concrete numerical value, namely as long as the first locating surface 394 and the 3rd locating surface 396 separate the first preset distance, and the second locating surface 395 and the 4th locating surface 397 separate the second preset distance, again scintillation crystal 32 is pressed on the first locating surface 394 and the second locating surface 395, and after position sensitive photo-multiplier tube 33 is pressed on the 3rd locating surface 396 and the 4th locating surface 397, scintillation crystal 32 and position sensitive photo-multiplier tube 33 have namely been realized pre-determined bit, that is to say, scintillation crystal 32 is in correct position with respect to position sensitive photo-multiplier tube 33, thereby realizes the optically-coupled of scintillation crystal 32 and position sensitive photo-multiplier tube 33.
At last, solidified at silicon rubber, screwed out the first dog screw 398 and the second dog screw 399, taken out scintillation crystal 32 and position sensitive photo-multiplier tube 33.
Wherein, preferably; for acting on snap-in force on the scintillation crystal 32 and the second dog screw 399, the tail end that reduces the first dog screw 398 acts on snap-in force on the position sensitive photo-multiplier tube 33; between scintillation crystal 32 and the first dog screw 398 and position sensitive photo-multiplier tube 33 and the second dog screw 399, can be provided with cushion block; thereby can effectively reduce the snap-in force that scintillation crystal 32 and position sensitive photo-multiplier tube 33 suffered screws apply; protection scintillation crystal 32 and position sensitive photo-multiplier tube 33 are not damaged, and have improved scintillation crystal 32 and 33 serviceable lifes of position sensitive photo-multiplier tube.Preferably, the first rectangle posting 391, the second rectangle posting 392 and base plate 393 are integrally formed.
Be understandable that the frock of scintillation crystal 32 and position sensitive photo-multiplier tube 33 pre-determined bit includes but not limited to above-mentioned positioning component 39 among the realization above-mentioned steps S3.
The course of work of following brief description gamma camera 100.
When having the gamma radioactive source in the visual field of gamma camera 100, be radiated on the collimating apparatus 2 that is positioned at accommodating chamber 11 behind the gamma ray transmissive complete machine shell that radioactive source is emitted and the front shroud 12 of gamma camera mounting shell 1, this part gamma ray finally is divided into two parts, wherein a part is masked by collimating apparatus 2, a remaining part penetrates collimating apparatus 2 and is radiated on the detector assembly 3 that is positioned at collimating apparatus 2 rear sides, specifically, gamma ray after the transmission is radiated on the scintillation crystal 32 after penetrating shading piece 34, after absorbing gamma energy, scintillation crystal 32 sends visible light, be positioned at scintillation crystal 32 rear surfaces and receive described visible lights and be converted into electric signal with the position sensitive photo-multiplier tube 33 of scintillation crystal 32 coupling, Electric signal processing unit 35 receives described electric signal and its signal that will carry out after then rough handling will be processed is transferred to host computer by insert row, carry out last analysis by host computer, calculate and process, to obtain the more specific location information of gamma radioactive source in the environment.
Below with reference to Figure 31-Figure 33 gamma radioactive source orientator 1000 is described simply.
Shown in Figure 31-33, gamma radioactive source orientator 1000 comprises complete machine shell, gamma camera 100, video camera 300 and host computer.
Have chamber in the complete machine shell, gamma camera 100 and video camera 300 all are located in the chamber, and host computer is used for receiving and processing the data message that is fed back by gamma camera 100 and video camera 300.
Such as Figure 31-shown in Figure 33, the complete machine shell comprises housing 210, front panel assembly 220 and back panel assemblies 230.Wherein, the front side of housing 210 and rear side all open wide, and housing 210 can be made by metallic aluminium, and the quality that can reduce like this housing 210 improves the intensity of housing 210 simultaneously.Front panel assembly 220 is located on the housing 210 and the front side of closure casing 210.Back panel assemblies 230 is located on the housing 210 and the rear side of closure casing 210, such as Figure 31 and shown in Figure 32, limits chamber between its middle shell 210, front panel assembly 220 and the back panel assemblies 230, is provided with mounting groove in the chamber.
As shown in figure 31, front panel assembly 220 comprises: front panel 2210 and front cover body 2220.Front cover body 2220 is located at the front end of housing 210, and wherein front panel 2210 is located on the front cover body 2220 and is positioned at the rear side of front shroud body 2220 front end faces at fore-and-aft direction.Thus, can prevent that water on the housing 210 or the water droplet of drippage from dropping on the front panel 2210, thus effectively protected front panel 2210 and on parts.
Wherein front panel 2210 can be made by acrylic (being organic glass, polymethylmethacrylate) material, and front panel 2210 surfaces are done blacking and processed, and for example the dumb light of spray black coats with lacquer to increase the shielding of 2210 pairs of visible lights of front panel.Because video camera 300 is located in the chamber, therefore in front on the plate 2210 position of corresponding video camera 300 do not do the blacking processing so that light can enter in the chamber.
Shown in figure 32, back panel assemblies 230 comprises: rear panel 2310 and rear cover body 2320.Rear cover body 2320 is located at the rear end of housing 210, and wherein, rear panel 2310 is located on the rear cover body 2320 and is positioned at the front side of rear cover body 2320 rear end faces at fore-and-aft direction, and rear panel 2310 is provided with installs switch, electric interfaces and wireless transmission antenna etc.Because rear panel 2310 is positioned at the front side of rear cover body 2320 rear end faces at fore-and-aft direction; the water droplet that therefore can effectively prevent water on the housing 210 or drippage lags behind on the plate 2310; thereby protect better rear panel 2310 with and on electric interfaces and switch; prevent these parts damages, affect the normal operation of gamma ray orientator.
Such as Figure 31 and shown in Figure 32, front cover body 2220 is given prominence to forward the forward position of housing 210 and the rear edge that rear cover body 2320 is given prominence to housing 210 backward, wherein the outer peripheral face of front cover body 2220 and rear cover body 2320 can be arranged to have certain gradient, on the one hand so that complete machine shell profile is round and smooth attractive in appearance, can also prevent further that on the other hand water droplet from falling on front panel 2210 or the rear panel 2310 thus.
Such as Figure 31 and shown in Figure 32, be formed with on the left side wall of housing 210 to be formed with on the right side wall that is suitable for left holding part 240 that staff grips and housing 210 and be suitable for the right holding part 250 that staff grips.Thus, can carry more easily the complete machine shell by the left holding part 240 of clasp and right holding part 250.
Particularly, such as Figure 31 and shown in Figure 32, left holding part 240 is along the fore-and-aft direction extension and inwardly concave left side wall, and right holding part 250 is along the fore-and-aft direction extension and inwardly concave right side wall.Preferably, left holding part 240 is provided with anti-skidding an of left side and right holding part 250 is provided with right anti-skidding section, thereby avoids occurring in handling process skidding.
Alternatively, left anti-skidding can form a plurality of vertically be spaced apart from each other and along the anti-skidding muscle in the linearly extended left side of fore-and-aft direction, and similarly, right anti-skidding can form a plurality of vertically be spaced apart from each other and along the anti-skidding muscle in the linearly extended right side of fore-and-aft direction.Certainly, in other embodiment of the present utility model, left anti-skidding section also can form a plurality of left anti-skidding muscle vertically being spaced apart from each other and extending along the fore-and-aft direction curve, similarly, right anti-skidding section also can form a plurality of right anti-skidding muscle vertically being spaced apart from each other and extending along the fore-and-aft direction curve.
Advantageously, housing 210 can be integrally formed, that is to say, housing 210 is made the one-piece construction that front and back are opened wide, and can greatly improve like this intensity of housing 210, and convenient production simplified production technology simultaneously, and cost is low.
As shown in figure 33, mounting groove is on linear pattern groove and the roof and/or diapire that is located at described chamber, that is to say, mounting groove can only be located on the roof of cavity, or only is located on the diapire of chamber, or is located at simultaneously on the roof and diapire of chamber.Preferably, mounting groove can be stretched by the roof of housing 210 and/or diapire and form, and can improve like this intensity of mounting groove, convenient to gamma radioactive source orientator 1000 parts such as video camera 300 and gamma camera 100 etc. effectively fix and guarantee to assemble firm.
Gamma radioactive source orientator 1000 of the present utility model can be used for the gamma radioactive source in the testing environment, for example there is the gamma radioactive source in the environment, gamma camera 100 detect be converted into electric signal behind the gamma ray that this radioactive source emits and carry out rough handling and with data transmission to host computer, simultaneous camera feeds back to host computer with the image information in the environment, the data analysis that host computer is uploaded gamma camera 100, calculating and processing and the ambient image information of passing back in conjunction with video camera 300, the position in final accurately located irradiation source also is presented on image on the display screen of host computer.Gamma radioactive source orientator 100 of the present utility model can be used on nuclear power station, for detection of whether nuclear leakage being arranged, certainly also can be used on station or some public places, for detection of whether there being the gamma radioactive source in these places, ensures public safety.
In the description of this instructions, the description of reference term " embodiment ", " some embodiment ", " illustrative examples ", " example ", " concrete example " or " some examples " etc. means to be contained at least one embodiment of the present utility model or the example in conjunction with specific features, structure, material or the characteristics of this embodiment or example description.In this manual, the schematic statement of above-mentioned term not necessarily referred to identical embodiment or example.And the specific features of description, structure, material or characteristics can be with suitable mode combinations in any one or more embodiment or example.
Although illustrated and described embodiment of the present utility model, those having ordinary skill in the art will appreciate that: can carry out multiple variation, modification, replacement and modification to these embodiment in the situation that does not break away from principle of the present utility model and aim, scope of the present utility model is limited by claim and equivalent thereof.
Claims (10)
1. a collimating apparatus that is used for gamma radioactive source orientator is characterized in that, comprising:
The first fixed head of transmissive gamma ray and the second fixed head;
The barricade of maskable gamma ray, the central authorities of described barricade are formed with the breakthrough part that connects described barricade at fore-and-aft direction, and wherein said barricade is located between described the first and second fixed heads;
Maskable gamma ray and have a plurality of shielding slabs of reservation shape, described a plurality of shielding slabs are positioned between described the first and second fixed heads and are positioned at the breakthrough part of described barricade.
2. the collimating apparatus for gamma radioactive source orientator according to claim 1, it is characterized in that, be formed with a plurality of first mounting grooves identical with described a plurality of shielding slab arrangement modes on the rear surface of described the first fixed head, be formed with a plurality of the second mounting grooves corresponding with described a plurality of the first mounting groove positions on fore-and-aft direction on the front surface of described the second fixed head, wherein each described shielding slab all is located between described the first mounting groove and second mounting groove corresponding with it.
3. the collimating apparatus for gamma radioactive source orientator according to claim 2, it is characterized in that, each described first mounting groove is with identical with its corresponding shielding slab shape, and each described second mounting groove and on fore-and-aft direction the first mounting groove shape corresponding with it just as.
4. the collimating apparatus for gamma radioactive source orientator according to claim 2 is characterized in that, each described shielding slab bonds by cementing agent respectively and between the first mounting groove corresponding with it and the second mounting groove.
5. the collimating apparatus for gamma radioactive source orientator according to claim 1, it is characterized in that, be formed with a plurality of mounting grooves identical with described a plurality of shielding slab arrangement modes on the rear surface of described the first fixed head, described a plurality of shielding slabs are located at respectively between the front surface of described a plurality of mounting groove and described the second fixed head correspondingly.
6. the collimating apparatus for gamma radioactive source orientator according to claim 1 is characterized in that, described the first fixed head is made by organic glass or plastics, and described the second fixed head is made by organic glass or plastics.
7. the collimating apparatus for gamma radioactive source orientator according to claim 1 is characterized in that, described the first fixed head and described the second fixed head are bonded on the front surface and rear surface of described barricade by cementing agent respectively.
8. the collimating apparatus for gamma radioactive source orientator according to claim 1 is characterized in that, passes through the screw fastening of a plurality of transmissive gamma rays between described the first fixed head and described the second fixed head.
9. the collimating apparatus for gamma radioactive source orientator according to claim 8 is characterized in that, described screw is plastic screw.
10. each described collimating apparatus for gamma radioactive source orientator is characterized in that according to claim 1-9, and described shielding slab is tungsten piece, tungalloy piece, lead or lead alloy piece; Described barricade is tungsten plate, tungalloy plate, stereotype or lead alloy plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220391991 CN202886612U (en) | 2012-08-08 | 2012-08-08 | Collimator for gamma radioactive-source position indicator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220391991 CN202886612U (en) | 2012-08-08 | 2012-08-08 | Collimator for gamma radioactive-source position indicator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202886612U true CN202886612U (en) | 2013-04-17 |
Family
ID=48078023
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220391991 Withdrawn - After Issue CN202886612U (en) | 2012-08-08 | 2012-08-08 | Collimator for gamma radioactive-source position indicator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202886612U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102798879A (en) * | 2012-08-08 | 2012-11-28 | 北京辛耕普华医疗科技有限公司 | Collimator for gamma radioactive source position indicator |
| CN104173074A (en) * | 2014-07-21 | 2014-12-03 | 北京辛耕普华医疗科技有限公司 | Geometric calibration method for SPECT (single photon emission computed tomography) system |
| CN104414671A (en) * | 2013-09-02 | 2015-03-18 | 上海联影医疗科技有限公司 | Shielding component, manufacturing method of shielding component and PET (positron emission tomography) system |
| CN104934087A (en) * | 2015-06-12 | 2015-09-23 | 同方威视技术股份有限公司 | Lead shielding structure of non-detection surface of scintillant |
| CN109900725A (en) * | 2017-12-08 | 2019-06-18 | 成都辐安科技有限公司 | A kind of radiation ray collimator |
-
2012
- 2012-08-08 CN CN 201220391991 patent/CN202886612U/en not_active Withdrawn - After Issue
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102798879A (en) * | 2012-08-08 | 2012-11-28 | 北京辛耕普华医疗科技有限公司 | Collimator for gamma radioactive source position indicator |
| CN102798879B (en) * | 2012-08-08 | 2015-06-03 | 北京永新医疗设备有限公司 | Collimator for gamma radioactive source position indicator |
| CN104414671A (en) * | 2013-09-02 | 2015-03-18 | 上海联影医疗科技有限公司 | Shielding component, manufacturing method of shielding component and PET (positron emission tomography) system |
| CN104414671B (en) * | 2013-09-02 | 2018-08-03 | 上海联影医疗科技有限公司 | Shielding element, its manufacturing method and PET system |
| CN104173074A (en) * | 2014-07-21 | 2014-12-03 | 北京辛耕普华医疗科技有限公司 | Geometric calibration method for SPECT (single photon emission computed tomography) system |
| CN104934087A (en) * | 2015-06-12 | 2015-09-23 | 同方威视技术股份有限公司 | Lead shielding structure of non-detection surface of scintillant |
| CN109900725A (en) * | 2017-12-08 | 2019-06-18 | 成都辐安科技有限公司 | A kind of radiation ray collimator |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202886612U (en) | Collimator for gamma radioactive-source position indicator | |
| CN202815229U (en) | Gamma radioactive source positioning device and gamma camera used for same | |
| CN202886613U (en) | Detector assembly for gamma radioactive-source position indicator | |
| CN102798879B (en) | Collimator for gamma radioactive source position indicator | |
| CN108828558B (en) | Laser radar | |
| CN102788989B (en) | Gamma camera for gamma radioactive source positioning apparatus and gamma radioactive source positioning apparatus | |
| CN201340400Y (en) | Hand-held X-ray fluorescence spectrometer with integrated heat sink | |
| CN208283566U (en) | A kind of vehicle-mounted radiation monitoring equipment | |
| CN102830419B (en) | Detector assembly for gamma radioactive source positioning instrument and manufacturing method thereof | |
| CN110018510A (en) | A kind of uranium ore rock core β-γ is edited and recorded automatically and image-scanning device | |
| KR102538327B1 (en) | Display device | |
| CN111691805A (en) | Method and system for manufacturing radiation protection door | |
| EP1956350B1 (en) | A molten steel level measuring instrument with a long scintillator | |
| FR2759485B1 (en) | PORT FOR PROTECTION AGAINST RADIATION | |
| CN202025485U (en) | Display screen and display unit thereof | |
| CN201984269U (en) | Glass sealing device of camera shield | |
| CN209000426U (en) | Illuminating module and display screen | |
| CN216531477U (en) | Radiation-proof binocular camera convenient for angle adjustment | |
| CN217007012U (en) | Aggregate visual detection device | |
| CN102590852B (en) | Protective device for digital X-ray imaging plate | |
| CN104833969A (en) | Active millimeter wave contraband detecting instrument | |
| CN218000619U (en) | Cylinder valve and valve positioning hand wheel thereof | |
| CN211651774U (en) | PET metering equipment | |
| CN213070474U (en) | LED floor tile display screen | |
| CN114035221B (en) | Multichannel astrose muon detection system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: BEIJING YONGXIN MEDICAL EQUIPMENT CO., LTD. Free format text: FORMER NAME: BEIJING NUCMED TECHNOLOGY LTD. |
|
| CP01 | Change in the name or title of a patent holder |
Address after: 100084, Beijing, Zhongguancun Tongzhou District science and Technology Park, Tongzhou Jinqiao Technology Industrial base, central section road, No. 17, 17A Patentee after: BEIJING YONGXIN MEDICAL EQUIPMENT CO., LTD. Address before: 100084, Beijing, Zhongguancun Tongzhou District science and Technology Park, Tongzhou Jinqiao Technology Industrial base, central section road, No. 17, 17A Patentee before: Beijing Nucmed Technology Ltd. |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20130417 Effective date of abandoning: 20150603 |
|
| RGAV | Abandon patent right to avoid regrant |