CN103995273A - Panorama imaging device and probe - Google Patents
Panorama imaging device and probe Download PDFInfo
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- CN103995273A CN103995273A CN201410193308.2A CN201410193308A CN103995273A CN 103995273 A CN103995273 A CN 103995273A CN 201410193308 A CN201410193308 A CN 201410193308A CN 103995273 A CN103995273 A CN 103995273A
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- 239000000523 sample Substances 0.000 title claims abstract description 46
- 238000003384 imaging method Methods 0.000 title claims abstract description 24
- 230000000007 visual effect Effects 0.000 claims description 11
- 229910001385 heavy metal Inorganic materials 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 230000002285 radioactive effect Effects 0.000 description 10
- 230000003287 optical effect Effects 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 3
- 241000150100 Margo Species 0.000 description 2
- 238000003491 array Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000005251 gamma ray Effects 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000007405 data analysis Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000006855 networking Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Abstract
The invention discloses a probe which comprises detectors, lenses and coding collimators, wherein the amount of the detectors, the lenses and the coding collimators is the same. The multiple detectors are uniformly distributed in an annular shape, the number of the detectors is N, N represents an even number greater than 2, the view field of each detector is radian X, and the product of N and X equals 2pi. The lenses and coding collimators are respectively arranged in one to one correspondence with the detectors. The invention also discloses a panorama imaging device which comprises an electronics system and the probe, wherein the probe is electrically connected and mutually communicated with the electronics system. The probe employs the multiple detectors which are uniformly distributed in the annular shape, and the product of the number of the detectors and the view field of each detector equals 2pi, so that panorama scanning can be conveniently and rapidly completed via the detectors in one step.
Description
Technical field
The present invention relates to the imaging technique in radiation safety field, be specifically related to realize the structure of panoramic imagery.
Background technology
Coded aperture (Coded Aperture, CA) imaging has the outstanding advantages such as detection efficiency is high, imaging time is short with respect to traditional pinhole imaging system, in addition, in coded imaging technology, very important noise reduction mode is the noise that the mode of subtracting each other by positive and negative coding reduces background and system, based on above advantage, CA imaging becomes radiological imaging technological development direction.At present, on market, coded aperture BIOImaging Analyzer is single detector, has certain taper visual field, can position and imaging the radiographic source of certain limit.For the perforate mode of coded aperture, common are RA (Random Arrays, random array) and MURA (Modified Uniformly Redundant Arrays, revises even redundant array) etc.As GammaCam (U.S. AIL System company exploitation a gamma imager) and RadCam (a gamma imager that U.S. RMD company develops) have all adopted MURA coded imaging, for single probe imager, coded number is 19 can realize by collimating apparatus half-twist the switching (meet coded number and be when prime number and coded number are 4N-1 encode pattern have rotation skew-symmetry) of positive Gray code, but, there is the interference problem of half field-of-view's internal source to full visual field internal source in the periodicity due to MURA coding collimating apparatus.For RA, because coding pattern does not possess periodically, there is not half field-of-view's interference problem, but do not possess rotation skew-symmetry yet simultaneously, in single probe system, be difficult to realize the noise reduction of positive and negative coding.This is external carries out circumstances not known in the operation of radiation focus investigation, adopt that single probe imager need pop one's head in by hand rotation towards, multi collect, realizes the panoramic scanning to surrounding enviroment.Adopt existing imager to realize time of panoramic scanning long, efficiency is very low, and troublesome poeration, does not meet modernization requirement fast and easily.
Summary of the invention
For problems of the prior art, object of the present invention is for providing a kind of probe and panoramic imaging device that carries out quickly and easily panoramic scanning.
For achieving the above object, technical scheme of the present invention is as follows:
A kind of probe, comprise a plurality of detectors, camera lens and coding collimating apparatus, described detector, camera lens are identical with the quantity of coding collimating apparatus, described a plurality of detector ring is uniform, the quantity of described detector is N, and described N is greater than 2 even number, and described in each, the visual field of detector is X radian, and long-pending 2 π that equal of N and X, arrange between described a plurality of camera lenses and a plurality of coding collimating apparatus and described a plurality of detector correspondingly.
Further, also comprise base and shell, described a plurality of detectors are laid on described base, and described shell be located on described base, and thering is N installed surface, described camera lens and described coding collimating apparatus are arranged on N installed surface of described shell correspondingly with described detector respectively.
Further, described shell can once rotate Y radian relative to described base together with described coding collimating apparatus, and amassing of described Y and described N be 2 π, any two adjacent coding collimating apparatuss positive and negative coding each other in described a plurality of coding collimating apparatuss.
Further, coded number when described coding collimating apparatus adopts random array is arbitrary integer, and when described coding collimating apparatus adopts MURA, coded number is prime number.
Further, also comprise the first shielding block and secondary shielding block, described the first shielding block is arranged between any two adjacent described detectors, and described secondary shielding block is arranged on the annular center that described a plurality of detector forms.
Further, described the first shielding block and described secondary shielding block are heavy metal shield material.
Further, described the first shielding block is the baffle plate vertically arranging, and described secondary shielding block is a circular column, and mutual shielding between detector described in any two is separated in described the first shielding block and the acting in conjunction of described secondary shielding block.
Further, between described any two adjacent coding collimating apparatuss and the full field of view edge of detector, be parallel to each other.
Further, also comprise turntable, described turntable connects the described probe of driving and rotates.
For achieving the above object, the present invention also provides following technical scheme:
A panoramic imaging device, comprises electronic system, also comprises probe as above, is electrically connected and can intercoms mutually between described probe and described electronic system.
Further, described electronic system is fixedly installed in a bearing, and described probe is arranged on described bearing.
Further, also comprise turntable, described turntable connects the described probe of driving and rotates.
Compared with prior art, the present invention adopts the uniform detector of a plurality of annulars in the present invention, long-pending 2 π that equal of the quantity of detector and the visual field of each detector, thus by the plurality of detector is disposable, realize panoramic scanning operation, convenient and swift.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the present invention is described in further detail:
Fig. 1 is the structural representation of panoramic imaging device of the present invention;
Fig. 2 is sonde configuration schematic diagram of the present invention;
Fig. 3 is probe of the present invention visual field structural representation;
Fig. 4 is the scanning schematic diagram of probe of the present invention to radioactive source;
Fig. 5 is the structural representation of the electronic system in panoramic imaging device of the present invention.
Embodiment
The exemplary embodiments that embodies feature & benefits of the present invention will describe in detail in the following description.Be understood that the present invention can have various variations on different embodiment, it neither departs from the scope of the present invention, and explanation wherein and accompanying drawing be when the use that explain in itself, but not in order to limit the present invention.
As shown in Figure 1, panoramic imaging device in the present embodiment comprises probe 1, turntable 2 and electronic system 3, and probe 1 is for radioactive source is scanned, and turntable 2 connects probe 1 and rotates probe 1, electronic system 3 communications and electric connection probe 1, process the data analysis of 1 collection of popping one's head in.Turntable 2 of the present invention is not indispensable, also probe 3 can be made into fixed form or pass through hand rotation.
As shown in Figure 2, and with reference to figure 3 and Fig. 4, probe 1 of the present invention comprises base 10, shell 11, a plurality of camera lens 12, a plurality of coding collimating apparatus 13, a plurality of detector 14, the first shielding block 15 and secondary shielding block 16.Base 10 is for carrying detector 14, shell 11 fastens base 10, and load camera lens 12 thereon and the collimating apparatus 13 of encoding, camera lens 12 is ordinary optical camera lens, be used for carrying out common camera, coding collimating apparatus 13 is surveyed for 14 pairs of radioactive sources 4 of tie detector, and the first shielding block 15 and secondary shielding block 16 is for to shielding between each detector 14.
In the present invention, detector 14 is position sensitive gamma-ray detector, and a plurality of detector 14 annulars are uniform, the quantity of detector 14 is N, the visual field of each detector 14 is X radian, and the long-pending of N and X equal 2 π, so that probe of the present invention 1 is realized panoramic imagery function.Shell 11 has N installed surface, and camera lens 12, coding collimating apparatus 13 are identical with the quantity of detector 14, and are arranged on correspondingly on N installed surface of shell 11 with detector 14 respectively.In the present embodiment, N is that 6, X is π/3, not take that this counts as restriction during actual set.
MURA coding is to adopt at present maximum coded systems, and according to its coding rule, coded number should be prime number.When coded number is 4N-1, its coding pattern has rotation skew-symmetry, and by half-twist, coding pattern other element except the element of one, center is just in time contrary, but do not have this rotation when coded number is 4N+1, does not oppose old property.In coded imaging, the use of positive and negative coding pattern can significantly reduce background noise, therefore the products such as GammaCam, RadCam have all adopted coded number, is the MURA coded system of 4N-1 (19,23 etc.).
In the present invention, N is greater than 2 even number, and shell 11 can once rotate Y radian relative to base 10, and long-pending 2 π that equal of Y and N, any two adjacent coding collimating apparatuss 13 positive and negative coding each other in a plurality of coding collimating apparatuss 13.In the present embodiment, N is that 6, Y is π/3, not take that this counts as restriction during actual set.This kind of mode only needs 1 cover rotating mechanism (being turntable 2 in the present embodiment) can realize the positive and negative coding switching of 6 detectors 14 simultaneously, and respectively 6 coding collimating apparatuss 13 carried out to positive and negative switching without 6 cover rotating mechanisms.In addition, this positive and negative coding switching mode makes as adopted MURA coding, and coded number meets prime number, is not subject to the restriction of 4N-1; As adopt RA coding, coded number is integer.
In the present invention, as shown in Figure 3, between any two adjacent coding collimating apparatuss 13 and the full field of view edge of detector 14, be parallel to each other.Full visual field and half field-of-view define according to geometric relationship described in Fig. 4, the radial energy that radioactive source 4 in full visual field is emitted is projected in complete code period in detector 14 planes, radioactive source 4 in half field-of-view is partly projected in coding pattern on detector plane, generally, coding collimating apparatus 13 areas are greater than detector, here complete code period is consistent with detector size, for MURA, complete code period is N * N, detector 14 areas are N * N, and coding collimating apparatus 13 is typically designed to (2N-1) * (2N-1).Specifically, in any two adjacent coding collimating apparatuss 13 and detector 14, line or the joint face of the margo dexter of coding collimating apparatus 13 in left side and the margo dexter of the detector in left side 14 are First Line face 101, the line of the left border of coding collimating apparatus 13 on right side and the left border of the detector on right side 14 or joint face are the second line face 101, between First Line face 101 and the second line face 102, are parallel to each other.
As adopt MURA coding, single probe coded aperture imaging instrument carries out radioactive source location and has the source positions erroneous judgement problem in half field-of-view's situation.In probe 1 of the present invention, each detector 14 all has 2 adjacent detectors 14, can comprehensively judge in conjunction with adjacent detector 14 imaging results the actual position of radioactive source 4, as shown in Figure 4, this radioactive source 4 is positioned at two regions that are crossed as picture, according to imaging, can judge that this radioactive source 4 is positioned at the half field-of-view of left side detector 14, and the full visual field in right side detector 14, by image co-registration, can correctly locate the position of this radioactive source 4.
Shielding construction comprises that the first shielding block 15 and secondary shielding block 16, the first shielding blocks 15 are arranged between any two adjacent detectors 14, and secondary shielding block 16 is arranged on the annular center that a plurality of detectors 14 form.And the first shielding block 15 and secondary shielding block 16 are heavy metal shield material.Wherein, the first shielding block 15 is the baffle plate vertically arranging, and secondary shielding block 16 is a circular column, and mutual shielding between any two detectors 14 is separated in the first shielding block 15 and 16 actings in conjunction of secondary shielding block.
The structure of the turntable 2 in the present embodiment is not particularly limited, and can be worm gear structure, can be gear transmission structure yet, so long as can realize the rotation of probe 1.
In the present embodiment, as shown in Figure 5, electronic system 3 is fixedly installed in a bearing 30, and turntable 2 is arranged on bearing 30, and probe 1 is arranged on bearing 30 by this turntable 2.Electronic system 3 comprises that data acquisition module 31, optical imagery acquisition module 32, turntable control module 33, data gather transport module 34, low-tension supply module 35 and high-voltage power module 36.In the present embodiment, data acquisition module 31 is realized the analog signal figure collection of 6 detectors 14 and the digital acquisition of gamma ray detection information.Optical imagery acquisition module 32 is realized the digital acquisition of 6 camera lenses 12.Turntable control module 33 realizes to be controlled the electric machine rotation of turntable 2.Data gather the data that transport module 34 receives data acquisition module 31, optical imagery acquisition module 32 and turntable control module 33, transfer data to back-end computer, and realize the control of back-end computer to system with gigabit networking agreement.Low-tension supply module 35 provides system works required low-tension supply.High-voltage power module 36 provides detector 14 work required high-voltage power supply.
Compared with prior art, the present invention adopts the uniform detector of a plurality of annulars 14 in the present invention, long-pending 2 π that equal of the visual field of the quantity of detector 14 and each detector 14, thus by the plurality of detector 14 is disposable, realize panoramic scanning operation, convenient and swift; The positive and negative coding that framework of the present invention can efficiently realize N probe unit by a set of rotating mechanism switches; Sonde configuration of the present invention can pass through the result of detection Comprehensive Correlation of adjacent detector, avoids the interference of half field-of-view's internal source 4; Sonde configuration of the present invention only need be designed to two adjacent coding collimating apparatuss 13 positive and negative each other, needn't pursue code pattern sample body and have rotation skew-symmetry, can more freely select coded system and coded number.
Technical scheme of the present invention is disclosed as above by preferred embodiment.Those skilled in the art should recognize in the situation that do not depart from change and the retouching that scope and spirit of the present invention that the appended claim of the present invention discloses are done, within all belonging to the protection domain of claim of the present invention.
Claims (12)
1. a probe, it is characterized in that, comprise a plurality of detectors, camera lens and coding collimating apparatus, described detector, camera lens are identical with the quantity of coding collimating apparatus, and described a plurality of detector rings are uniform, and the quantity of described detector is N, described N is greater than 2 even number, described in each, the visual field of detector is X radian, and long-pending 2 π that equal of N and X, and between described a plurality of camera lenses and a plurality of coding collimating apparatus and described a plurality of detector, arranges correspondingly.
2. probe as claimed in claim 1, it is characterized in that, also comprise base and shell, described a plurality of detector is laid on described base, described shell be located on described base, and thering is N installed surface, described camera lens and described coding collimating apparatus are arranged on N installed surface of described shell correspondingly with described detector respectively.
3. probe as claimed in claim 2, it is characterized in that, described shell can once rotate Y radian relative to described base together with described coding collimating apparatus, and amassing of described Y and described N be 2 π, any two adjacent coding collimating apparatuss positive and negative coding each other in described a plurality of coding collimating apparatuss.
4. probe as claimed in claim 3, is characterized in that, coded number when described coding collimating apparatus adopts random array is arbitrary integer, and when described coding collimating apparatus adopts MURA, coded number is prime number.
5. probe as claimed in claim 1, it is characterized in that, also comprise the first shielding block and secondary shielding block, described the first shielding block is arranged between any two adjacent described detectors, and described secondary shielding block is arranged on the annular center that described a plurality of detector forms.
6. probe as claimed in claim 5, is characterized in that, described the first shielding block and described secondary shielding block are heavy metal shield material.
7. probe as claimed in claim 6, it is characterized in that, described the first shielding block is the baffle plate vertically arranging, and described secondary shielding block is a circular column, and mutual shielding between detector described in any two is separated in described the first shielding block and the acting in conjunction of described secondary shielding block.
8. probe as claimed in claim 2, is characterized in that, between described any two adjacent coding collimating apparatuss and the full field of view edge of detector, is parallel to each other.
9. probe as claimed in claim 1, is characterized in that, also comprises turntable, and described turntable connects the described probe of driving and rotates.
10. a panoramic imaging device, comprises electronic system, it is characterized in that, also comprises the probe as described in as arbitrary in claim 1-8, between described probe and described electronic system, is electrically connected and can intercoms mutually.
11. panoramic imaging devices as claimed in claim 10, is characterized in that, described electronic system is fixedly installed in a bearing, and described probe is arranged on described bearing.
12. panoramic imaging devices as described in claim 10 or 11, is characterized in that, also comprise turntable, and described turntable connects and drives described probe to rotate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410193308.2A CN103995273B (en) | 2014-05-08 | 2014-05-08 | A kind of panoramic imaging device and probe |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410193308.2A CN103995273B (en) | 2014-05-08 | 2014-05-08 | A kind of panoramic imaging device and probe |
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| CN103995273A true CN103995273A (en) | 2014-08-20 |
| CN103995273B CN103995273B (en) | 2016-08-24 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104155675A (en) * | 2014-08-27 | 2014-11-19 | 中国科学院高能物理研究所 | Radiation source positioning and imaging device |
| JP2017191072A (en) * | 2016-04-15 | 2017-10-19 | 三星電子株式会社Ｓａｍｓｕｎｇ Ｅｌｅｃｔｒｏｎｉｃｓ Ｃｏ．，Ｌｔｄ． | Image capturing device and image capturing method |
| CN113109857A (en) * | 2021-03-24 | 2021-07-13 | 北京大学 | Medium-energy electronic detection probe and medium-energy electronic detector |
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| CN203133468U (en) * | 2013-03-21 | 2013-08-14 | 武汉大学 | Panoramic image acquisition device |
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2014
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| US20020075990A1 (en) * | 2000-09-29 | 2002-06-20 | Massachusetts Institute Of Technology | Coded aperture imaging |
| JP2004061808A (en) * | 2002-07-29 | 2004-02-26 | K-S Creative Studio:Kk | Panoramic photographing device |
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| CN104155675A (en) * | 2014-08-27 | 2014-11-19 | 中国科学院高能物理研究所 | Radiation source positioning and imaging device |
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| CN113109857A (en) * | 2021-03-24 | 2021-07-13 | 北京大学 | Medium-energy electronic detection probe and medium-energy electronic detector |
| CN113109857B (en) * | 2021-03-24 | 2024-04-19 | 北京大学 | Medium-energy electronic detection probe and medium-energy electronic detector |
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| CN103995273B (en) | 2016-08-24 |
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Effective date of registration: 20180906 Address after: 100043 302, 3 floor, 1 building, 18 Shixing East Street, Shijingshan District, Beijing. Patentee after: BEIJING HIGH ENERGY NEW TECHNOLOGY CO., LTD. Address before: 100049 Beijing Shijingshan District 19 Yuquanlu Road No. 2 hospital Patentee before: High Energy Physics Inst., Chinese Academy of Sciences |