CN201569747U - Detector device for radiation imaging - Google Patents
Detector device for radiation imaging Download PDFInfo
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- CN201569747U CN201569747U CN2009201090442U CN200920109044U CN201569747U CN 201569747 U CN201569747 U CN 201569747U CN 2009201090442 U CN2009201090442 U CN 2009201090442U CN 200920109044 U CN200920109044 U CN 200920109044U CN 201569747 U CN201569747 U CN 201569747U
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Abstract
The utility model discloses a one-dimension position sensing ionization chamber gas detector device for ray detection and radiation imaging, which belongs to the technical field of the nuclear radiation application, and mainly consists of a metal sealing shell, an anode plate, a multi-electrode slat and an electronics circuit component, and is characterized in that the anode plate and the multi-electrode slat are arranged inside the metal sealing shell; the electronics circuit component is arranged outside the metal sealing shell; the metal sealing shell consists of a base, a sealing switching circuit board, a substrate and a sealing rubber ring; the anode plate and the multi-electrode slat are made of a printing circuit board; and the electronics circuit component outside the shell is connected with the multi-electrode slat inside the shell in a signal way through the sealing switching circuit board which is arranged inside the shell. The detector has the advantages of high resolution, simple installation and debugging process and convenient repairing, can be used for the scientific research field of electrified particle detection and high-energy photon detection, and is also applicable to the safety inspection fields such as small-sized articles CT, human body scanning and fluoroscopy and the like.
Description
Technical field
The utility model belongs to the nuclear radiation applied technical field, is specifically related to a kind of gas ionization chamber detector device that is used for X-ray detection X and radiant image.
Background technology
The gases at high pressure ionization chamber, the ionization chamber that particularly charges into high-pressure inert gas has in scientific experiment, industry, medical science and safety check field very widely to be used.The gas ionization chamber of detecting x-ray often is designed to the form that multiple-unit is arranged, and is used for the radiant image of linear array or face battle array.
Publication number is to mention in the patented claim of CN1936498A: as required, a plurality of tubular ionization chamber assembled arrangement that comprise high-pressure stage and collector can be become various forms of one dimensions or two-dimentional X, Υ ray array detecting device.Owing to need between tube wall (high-field electrode of holding concurrently) and central metal thin tube (signal electrode of holding concurrently), to increase piezoelectricity, the diameter of tube wall just is restricted, so it is too little that tubular ionization chamber can not be done, in general mostly the diameter or the length of side are greater than 5mm's, even can accomplish forr a short time on the profile, ionization chamber stability and consistance can't be guaranteed.
The nineties in last century, Medical CT still generally adopts the high-pressure xenon ionization chamber as X-ray detector, its ionization chamber unit is to surround with very compact the cutting apart of the thin tungsten plate of high strength to form, the tungsten plate of each both sides, unit is respectively as high-field electrode and signal electrode, and all battery lead plates all are arranged in the fan type canister that is filled with high-pressure xenon.Such ionization chamber unit minimum widith generally can reach 1～2mm, and narrower than a plurality of independent sealed tubular ionization chamber array pitch in the preamble, position resolution is higher.But, CT requires strictness sensing X ray launching site of each unit, and the tungsten sheet needs to approach as much as possible, and (0.1～0.2mm), the degree of depth of X ray direction is quite dark again, and (50～80mm), this just proposes very high requirement to Machine Design with processing.
Mention the panel detector structure of a kind of MIC of being called (multi-strip ionization chamber) in the document " Usage of two types of high-pressure xenon chambers for medicalradiography " (Nucl.Instr.and Meth.A 461 (2001) 430-434), adopt a high-field electrode circuit board and a multi-electrode bars circuit board placing of opposing parallel with it, realized being equivalent to the ionization chamber one-dimensional array that cell width is 0.4mm, resolution greatly improves.But, this structural entity design is all to be placed into electronics circuit assemblies such as signal collection, amplification, conversion in the high-pressure closed vessel, when installing and keeping in repair, the amount discharge container of high-pressure inert gas need being gone ahead of the rest, again intraware is all dismantled just and can be carried out, so not only cause the meaningless waste of noble gas, also make the peace of detector transfer technology to become very complicated, servicing time is long.
The utility model content
At the problems referred to above, the utility model discloses a kind of detector assembly that is used for X-ray detection X and radiant image.The utility model purpose is in order to provide a kind of high resolving power, peace to transfer technology one dimension position sensing ionization chamber gas detector simple, easy to maintenance.
The utility model provides a kind of detector assembly that is used for X-ray detection X and radiant image, described detector assembly comprises can, positive plate, multi-electrode batten and electronics circuit assembly, wherein said positive plate, described multi-electrode batten are arranged in the can, it is characterized in that, described can comprises the sealing adaptor circuit board, and described sealing adaptor circuit board is clipped between base and the substrate; Described electronics circuit assembly places the can outside; Described electronics circuit assembly carries out signal with the multi-electrode batten by described sealing adaptor circuit board and is connected.
The utility model detector mainly is made of metallic seal shell, positive plate, multi-electrode batten and electronics circuit assembly; Fill in the ionization chamber with high-pressure inert gas, X ray passes incidence window and enters ionization chamber, produce ionization with the atom effect of working gas, the ionization composition drifts about to counter electrode under the high-voltage electric field effect, the induced charge that drift produces is proportional to the X-ray beam intensity of flow, they are collected, amplify, change by electronics circuit, output to computing machine at last.
It is characterized in that described positive plate, multi-electrode batten are arranged in the metallic seal shell; Described electronics circuit assembly places the metallic seal housing exterior; Described shell exoelectron circuit unit carries out signal with the interior multi-electrode batten of shell by the sealing adaptor circuit board that is clipped in the shell centre and is connected.
Preferably, the metallic seal shell is made of base, sealing adaptor circuit board, substrate and sealing rubber ring; Connect by a plurality of screws between them.
Preferably, described positive plate, multi-electrode batten are made by printed circuit board (PCB);
Preferably, the metal shell of base and substrate composition is made by aluminium or low atomic number metal.
Preferably, the sealing adaptor circuit board is made of multilayer board, and its internal layer is provided with conducting channel, and the signal that the sealing adaptor circuit board is learned multi-electrode batten in circuit unit and the shell in conjunction with flexible circuit board or bundle conductor with the shell exoelectron couples together.
Preferably, the entrance window that ray enters adopts the thin window design of slotting, the intermediate structure of the employing arc of thin window and peripheral structure on base.
Preferably, base and substrate are provided with columnar projections respectively.Positive plate and multi-electrode batten bond on base columnar projections and the substrate columnar projections with bonding agent respectively.
Preferably, the base side is provided with fills exhausr port, is used to vacuumize and charge into gases at high pressure.
Preferably, the electrode strip array that is used to collect electric charge on the multi-electrode bar circuit board is the fan type and distributes.All electrode strip directed ray sources.
Preferably, charge into high-pressure inert gas in the metallic seal shell.
From foregoing description, advantage of the present utility model as can be seen: the gas-sensitive district seals separately, is not subjected to the interference of other electronics circuit signals; When carrying out electronics circuit assembly peace mediation maintenance, do not need to open can, reduce technique process, increase work efficiency.
The utility model position sensing gas detector structure can be widely used in the scientific research field of charged particle detection, high-energy photon detection; Also can be used for industry or safety check fields such as small article CT, body scans perspective; Design through suitable can also be applied to require higher the field of nuclear medicine.
Description of drawings
From the detailed description below in conjunction with accompanying drawing, above-mentioned feature and advantage of the present utility model will be more obvious, wherein:
Fig. 1: the utility model detector primary structure schematic cross-section.
Fig. 2: the one-piece construction synoptic diagram of the utility model detector.
Fig. 3: the electrode strip distribution schematic diagram of multi-electrode bar circuit board
Fig. 4: embodiment of the present utility model (side view).
Fig. 5: embodiment of the present utility model (vertical view).
Reference numerals list:
1: base
2: the sealing adaptor circuit board
3: substrate
4: sealing rubber ring
5: flexible circuit board or bundle conductor
6: the electronics circuit assembly
7: multi-electrode bar circuit board
8: the anode high voltage circuit board
9:X ray or Υ radiographic source
10: checking matter
A: entrance window
B: countersunk head screw
C: substrate columnar projections
D: base columnar projections
E: bottom fixing threaded hole
F: fill exhausr port
G: cover the copper electrode bar
Embodiment
Below, describe preferred implementation of the present utility model with reference to the accompanying drawings in detail.In the accompanying drawings, though be shown in the different accompanying drawings, identical Reference numeral is used to represent identical or similar assembly.For clarity and conciseness, be included in here known function and the detailed description of structure will be omitted.
As shown in Figure 1, the detector device of the utility model embodiment comprises: base 1, sealing adaptor circuit board 2, substrate 3, two sealing rubber rings 4, flexible circuit board 5, electronics circuit assembly 6, multi-electrode bar circuit board 7, anode high voltage circuit board 8 etc.
Among Fig. 1, constitute whole sealed body structure by base 1, sealing adaptor circuit board 2, substrate 3, two sealing rubber rings 4; Connect by a plurality of sunk screws between them, link position is shown in countersunk head screw B;
Among Fig. 1, the metal shell that base 1 and substrate 3 are formed is made by aluminum or aluminum alloy.
Among Fig. 1, sealing adaptor circuit board 2 is made of multilayer board, and its internal layer is covered with conducting channel, and on the one hand, sealing adaptor circuit board 2 is as one of member of whole seal; On the other hand, it couples together in conjunction with the signal of flexible circuit board 5 with multi-electrode batten 7 in shell exoelectron circuit unit 6 and the shell.
Be to keep sealing, base 1, sealing adaptor circuit board 2, substrate 3 with sealing rubber ring 4 contacted each faces on surfaceness be 3.2 or below.
For keeping sealing, sealing rubber ring 4 materials adopt impermeability good, and the life-span is long, and the nothing of using mould to make is gluedd joint the rubber of face.
In order to reduce the weight of housing when guaranteeing enough intensity, base and substrate are provided with columnar projections (Fig. 1 C and Fig. 1 D) respectively.
Positive plate and multi-electrode batten bond on base columnar projections and the substrate columnar projections with bonding agent respectively.
What entrance window A adopted is the thin window design of slotting on base.The intermediate structure of the employing arc of thin window and peripheral structure can prevent that stress concentrations from causing damage.
Anode high voltage circuit board 8 and multi-electrode bar circuit board 7 bond on the columnar projections D and the columnar projections C on the substrate on the corresponding base with bonding agent respectively.
Fixing threaded hole E is used for the detector member and is connected with whole radiation scanning system with fastening.
Fig. 2 is the one-piece construction synoptic diagram of the utility model detector.F is that design is filled exhausr port on base 1 among the figure, is used to vacuumize and charge into gases at high pressure.
Fig. 3 is the electrode strip distribution schematic diagram of multi-electrode bar circuit board.G covers the copper electrode bar on the printed circuit board (PCB) among the figure, and electrode strip quantity can be from hundreds of to several thousand, and the width of electrode strip can be that zero point is several to several millimeters, and the length of every strip electrode bar is according to the energy of incident ray, can be tens millimeters to the hundreds of millimeter.Use the circuit software design tool, can guarantee the accurate directed ray of each road passive electrode source very easily.
In order to guarantee impermeability and security, after installing, detector to carry out strict helium mass spectrum leak detection and voltage-withstand test.
After the test passes, charge into high-pressure inert gas in the capsul, inert gas can be an argon gas, xenon etc., and air pressure can be from 0.1Mpa～3Mpa.
Fig. 4, Fig. 5 are embodiment of the present utility model (side view and vertical views).9 can be X-ray tube or Υ radiographic source among the figure.Beam is through collimating slit, pass checking matter 10 after, enter detector by the detector incidence window.Checking matter 10 can be article or human body.
When being used for perspective imaging, checking matter is made the rectilinear motion of above-below direction, or radiographic source and detector are made the rectilinear motion of above-below direction synchronously, and checking matter is motionless, by measuring, obtain from checking matter inside gamma ray absorption coefficient distributed image along the quantity of electric charge of each passage of exporting through detector multi-electrode bar circuit board on the sweep trace.
Top description only is used to realize embodiment of the present utility model; it should be appreciated by those skilled in the art; in any modification or partial replacement that does not break away from scope of the present utility model; all should belong to claim of the present utility model and come restricted portion; therefore, protection domain of the present utility model should be as the criterion with the protection domain of claims.
Claims (16)
1. the detector assembly that is used for X-ray detection X and radiant image, described detector assembly comprises can, positive plate, multi-electrode batten and electronics circuit assembly, wherein said positive plate, described multi-electrode batten are arranged in the can, it is characterized in that, described can comprises the sealing adaptor circuit board, and described sealing adaptor circuit board is clipped between base and the substrate; Described electronics circuit assembly places the can outside; Described electronics circuit assembly carries out signal with the multi-electrode batten by described sealing adaptor circuit board and is connected.
2. detector assembly according to claim 1 is characterized in that, described sealing adaptor circuit board is made of multilayer board, and its internal layer is provided with conducting channel.
3. detector assembly according to claim 1 and 2 is characterized in that, flexible circuit board or bundle conductor are set, and wherein said sealing adaptor circuit board couples together in conjunction with flexible circuit board or the bundle conductor signal with electronics circuit assembly and multi-electrode batten.
4. detector assembly according to claim 1 and 2 is characterized in that, described base and described substrate are provided with columnar projections respectively, and described positive plate and described multi-electrode batten bond on base columnar projections and the substrate columnar projections with bonding agent respectively.
5. detector assembly according to claim 1 and 2 is characterized in that, described positive plate, multi-electrode batten are made by printed circuit board (PCB).
6. detector assembly according to claim 1 and 2 is characterized in that, described base and substrate are made by aluminium or low atomic number metal.
7. detector assembly according to claim 1 is characterized in that described can also comprises sealing rubber ring, connects by a plurality of screws between wherein said base, sealing adaptor circuit board, substrate and the sealing rubber ring.
8. detector assembly according to claim 7 is characterized in that, described base, sealing adaptor circuit board, substrate with each face of sealing rubber ring joint on surfaceness be 3.2 or below.
9. according to claim 7 or 8 described detector assemblies, it is characterized in that the nothing that described sealing rubber ring uses mould to make is gluedd joint the rubber of face.
10. detector assembly according to claim 1 and 2 is characterized in that base is provided with the entrance window that ray enters, and this entrance window adopts the thin window design of slotting, the intermediate structure of the employing arc of thin window and peripheral structure on base.
11. detector assembly according to claim 1 and 2 is characterized in that, the base side is provided with fills exhausr port, is used to vacuumize and charge into gases at high pressure.
12. detector assembly according to claim 1 is characterized in that, the electrode strip array that is used to collect electric charge on the multi-electrode bar circuit board is the fan type and distributes all electrode strip directed ray sources.
13. detector assembly according to claim 12 is characterized in that, electrode strip quantity can be from hundreds of to several thousand, and the width of electrode strip can be that zero point is several to several millimeters, the length of electrode strip can be tens millimeters to the hundreds of millimeter.
14. detector assembly according to claim 1 is characterized in that, charges into high-pressure inert gas in the can.
15. detector assembly according to claim 14 is characterized in that, inert gas can be argon gas, xenon.
16., it is characterized in that the air pressure of inert gas can be from 0.1Mpa to 3Mpa according to claim 14 or 15 described detector assemblies.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201090442U CN201569747U (en) | 2009-06-30 | 2009-06-30 | Detector device for radiation imaging |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201090442U CN201569747U (en) | 2009-06-30 | 2009-06-30 | Detector device for radiation imaging |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201569747U true CN201569747U (en) | 2010-09-01 |
Family
ID=42662041
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201090442U Expired - Lifetime CN201569747U (en) | 2009-06-30 | 2009-06-30 | Detector device for radiation imaging |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201569747U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103116178A (en) * | 2012-12-28 | 2013-05-22 | 湖州师范学院 | Radioactive ray detecting device and detecting method |
| CN106783781A (en) * | 2016-12-22 | 2017-05-31 | 烟台艾睿光电科技有限公司 | Small size Infrared Detectors mounting assembly is disturbed in a kind of anti-vibration |
| WO2020156416A1 (en) * | 2019-01-30 | 2020-08-06 | The University Of Hong Kong | Energy-resolved x-ray imagingapparatus and method |
-
2009
- 2009-06-30 CN CN2009201090442U patent/CN201569747U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103116178A (en) * | 2012-12-28 | 2013-05-22 | 湖州师范学院 | Radioactive ray detecting device and detecting method |
| CN106783781A (en) * | 2016-12-22 | 2017-05-31 | 烟台艾睿光电科技有限公司 | Small size Infrared Detectors mounting assembly is disturbed in a kind of anti-vibration |
| CN106783781B (en) * | 2016-12-22 | 2019-03-15 | 烟台艾睿光电科技有限公司 | A kind of anti-vibration interference small size infrared detector mounting assembly |
| WO2020156416A1 (en) * | 2019-01-30 | 2020-08-06 | The University Of Hong Kong | Energy-resolved x-ray imagingapparatus and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100901 |