CN204740348U - Ray detector - Google Patents
Ray detector Download PDFInfo
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- CN204740348U CN204740348U CN201520374210.7U CN201520374210U CN204740348U CN 204740348 U CN204740348 U CN 204740348U CN 201520374210 U CN201520374210 U CN 201520374210U CN 204740348 U CN204740348 U CN 204740348U
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- photocathode
- electrode glass
- resistive plate
- plate room
- room
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01T—MEASUREMENT OF NUCLEAR OR X-RADIATION
- G01T1/00—Measuring X-radiation, gamma radiation, corpuscular radiation, or cosmic radiation
- G01T1/29—Measurement performed on radiation beams, e.g. position or section of the beam; Measurement of spatial distribution of radiation
- G01T1/2914—Measurement of spatial distribution of radiation
- G01T1/2921—Static instruments for imaging the distribution of radioactivity in one or two dimensions; Radio-isotope cameras
- G01T1/2935—Static instruments for imaging the distribution of radioactivity in one or two dimensions; Radio-isotope cameras using ionisation detectors
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Physics & Mathematics (AREA)
- High Energy & Nuclear Physics (AREA)
- Molecular Biology (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Measurement Of Radiation (AREA)
Abstract
The utility model discloses a ray detector, it is including hindering nature board room, the scintillation body and photocathode. Hindering nature board room includes first hindering nature board room and hindering nature of second board room. First hindering nature board room with hindering nature of second board room is connected. First hindering nature board room includes first electrode glass, hindering nature of second board room includes second electrode glass. The scintillation body is located first hindering nature board room reaches between hindering nature of the second board room. Photocathode includes a photocathode and the 2nd photocathode. A photocathode locates on the first electrode glass, the 2nd photocathode locates on the second electrode glass. The utility model discloses it is high that the sensitivity of ray is surveyed to embodiment's detector, still has quantum enhance function, have the position in addition and differentiate the dynamic height, characteristics such as low price, but the wide application in ray detector, and ray detector has the structure of two hindering nature board rooms, and the efficiency of surveying the ray is higher.
Description
Technical field
The utility model belongs to radiation detection field, particularly a kind of ray detector.
Background technology
At single photon emission tomographic imaging (Single-Photon Emission Computed Tomography, and positron emission tomography (Positron Emission Tomography SPECT), etc. PET) in detector system, owing to having scintillator structure, it is high that described detector has detection efficiency, the feature sensitive to ray, but its resolution characteristic is low.
The resolution force of resistive plate cell structure detector is high, but it is low to the sensitivity of ray, and when only having a resistive plate cell structure, detection efficiency is not high.
Utility model content
The utility model is intended at least to solve one of technical matters existed in prior art.For this reason, the utility model provides a kind of ray detector.
The ray detector of the utility model embodiment comprises resistive plate room, scintillator and photocathode.Described resistive plate room comprises the first resistive plate room and the second resistive plate room.Described first resistive plate room is connected with described second resistive plate room.Described first resistive plate room comprises the first electrode glass, and described second resistive plate room comprises the second electrode glass.Described scintillator is located between described first resistive plate room and described second resistive plate room.Described photocathode comprises the first photocathode and the second photocathode.Described first photocathode is located on described first electrode glass, and described second photocathode is located on described second electrode glass.
In the ray detector of the utility model embodiment, highly sensitive to ray of described scintillator, detection efficiency is high, and described scintillator can produce visible ray by after ray excitation.And to have resolution characteristic strong in described resistive plate room, structure is simple, the features such as low price, described resistive plate room and described scintillator are combined, the high sensitivity of ray detector can be realized, the function of high resolution, and structure is simple, low price, can be widely used on X-ray detection X field, especially in the detector system such as single photon emission tomographic imaging (SPECT) and positron emission tomography (PET).Resistive plate room is divided into the first resistive plate room and the second resistive plate room, can absorb the visible ray that described scintillator sends more, improve the detection efficiency of described ray detector.Further, when one of described first resistive plate room or described second resistive plate room are damaged time, described ray detector can also work on.
In some embodiments, described first photocathode is located at described first resistive plate chamber interior, and with described first electrode glass surface contact; Described second photocathode is located at described second resistive plate chamber interior, and with described second electrode glass surface contact.
In some embodiments, described scintillator is arranged on described first electrode glass and described second electrode glass.
In some embodiments, described first resistive plate room also comprises the 3rd electrode glass and the first carbon film, described 3rd electrode glass is located at described first resistive plate chamber interior and is parallel to each other with described first electrode glass, and described first carbon film is located on the surface of described 3rd electrode glass away from described first photocathode;
Described second resistive plate room also comprises the 4th electrode glass and the second carbon film, described 4th electrode glass is located at described second resistive plate chamber interior and is parallel to each other with described second electrode glass, and described second carbon film is located on the surface of described 4th electrode glass away from described second photocathode;
Described first carbon film and described second carbon film are added with the positive voltage being greater than 1000V respectively, and described first photocathode and described second photocathode are added with the negative voltage being greater than 1000V respectively; Resistivity under described first electrode glass, the second electrode glass the 3rd electrode glass and described 4th electrode glass normal temperature is greater than 10
12Ω .cm.
Additional aspect of the present utility model and advantage will part provide in the following description, and part will become obvious from the following description, or be recognized by practice of the present utility model.
Accompanying drawing explanation
Above-mentioned and/or additional aspect of the present utility model and advantage will become obvious and easy understand from accompanying drawing below combining to the description of embodiment, wherein:
Fig. 1 is the structural representation of the ray detector of the utility model embodiment.
Embodiment
Be described below in detail embodiment of the present utility model, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has element that is identical or similar functions from start to finish.Being exemplary below by the embodiment be described with reference to the drawings, only for explaining the utility model, and can not being interpreted as restriction of the present utility model.
In description of the present utility model, it will be appreciated that, term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width ", " thickness ", " on ", D score, " front ", " afterwards ", " left side ", " right side ", " vertically ", " level ", " top ", " end ", " interior ", " outward ", " clockwise ", orientation or the position relationship of the instruction such as " counterclockwise " are based on orientation shown in the drawings or position relationship, only the utility model and simplified characterization for convenience of description, instead of indicate or imply that the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore can not be interpreted as restriction of the present utility model.In addition, term " first ", " second " only for describing object, and can not be interpreted as instruction or hint relative importance or imply the quantity indicating indicated technical characteristic.Thus, be limited with " first ", the feature of " second " can express or impliedly comprise one or more described features.In description of the present utility model, the implication of " multiple " is two or more, unless otherwise expressly limited specifically.
In description of the present utility model, it should be noted that, unless otherwise clearly defined and limited, term " installation ", " being connected ", " connection " should be interpreted broadly, and such as, can be fixedly connected with, also can be removably connect, or connect integratedly; Can be mechanical connection, also can be electrical connection or can communication mutually; Can be directly be connected, also indirectly can be connected by intermediary, can be the connection of two element internals or the interaction relationship of two elements.For the ordinary skill in the art, the concrete meaning of above-mentioned term in the utility model can be understood as the case may be.
In the utility model, unless otherwise clearly defined and limited, fisrt feature second feature it " on " or D score can comprise the first and second features and directly contact, also can comprise the first and second features and not be directly contact but by the other characterisation contact between them.And, fisrt feature second feature " on ", " top " and " above " comprise fisrt feature directly over second feature and oblique upper, or only represent that fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " below " and " below " comprise fisrt feature directly over second feature and oblique upper, or only represent that fisrt feature level height is less than second feature.
The utility model provides a kind of ray detector, is explained below in conjunction with accompanying drawing.
Refer to Fig. 1, the ray detector 100 of the utility model embodiment comprises resistive plate room 10, scintillator 20 and photocathode 30.Resistive plate room 10 comprises the first resistive plate room 11 and the second resistive plate room 12.First resistive plate room 11 is connected with the second resistive plate room 12.First resistive plate 11 Room comprises the first electrode glass 111a, and the second resistive plate room 12 comprises the second electrode glass 121a.Scintillator 20 is located between the first resistive plate room 11 and the second resistive plate room 12.Photocathode 30 comprises the first photocathode 31 and the second photocathode 3231.First photocathode 31 is located on the first electrode glass 111a, and the second photocathode 32 is located on the second electrode glass 121a.
In the ray detector 100 of the utility model embodiment, scintillator 20 pairs of rays highly sensitive, detection efficiency is high, and scintillator 20 can produce visible ray by after ray excitation.And to have resolution characteristic strong in resistive plate room 10, structure is simple, the features such as low price, resistive plate room 10 and scintillator 20 are combined, the high sensitivity of ray detector 100 can be realized, the function of high resolution, and structure is simple, low price, can be widely used on X-ray detection X field, especially in the detector system such as single photon emission tomographic imaging (SPECT) and positron emission tomography (PET).Resistive plate room 10 is divided into the first resistive plate room 11 and the second resistive plate room 12, can absorb the visible ray that scintillator 20 sends to surrounding more, improve the efficiency of ray detector 100 detected ray.Further, when one of first resistive plate room 12, resistive plate room 11 or the second is damaged time, ray detector 100 can also work on.
Photocathode 30 has the effect of opto-electronic conversion, can receive the visible ray that scintillator 20 sends, and inspire electronics, visible ray information can be converted to electronic information.Because each electronics all sends from photocathode 30, therefore from photocathode 30 electronics sent and the number of electrons approximately equal causing snowslide, so the resistive plate room 10 adding photocathode 30 is just equivalent to the photomultiplier cell of a gas, ray detector 100 has very high photoelectron gain function.
In some embodiments, it is inner that the first photocathode 31 is located at the first resistive plate room 11, and with the first electrode glass 111a surface contact; It is inner that second photocathode 32 is located at the second resistive plate room 12, and with the second electrode glass 121a surface contact.
So, the working gas that the first photocathode 31 is excited in the electrons of rear generation and the first resistive plate room 11 is had an effect, and working gas ionizes out electronic secondary.First photocathode 31 and the first electrode glass 111a surface contact, after the first photocathode 31 adds voltage, corresponding first electrode glass 111a also can add voltage, realizes the alive requirement of electrode glass in the technology of resistive plate room.
In some embodiments, scintillator 20 is arranged on the first electrode glass 111a and the second electrode glass 121a.
Setting like this, the distance of scintillator 20 and the first photocathode 31 and the second photocathode 32 can be shortened, reduce the impact of the visible ray that outer bound pair scintillator 20 sends, improve the efficiency that the first photocathode 31 and the second photocathode 32 collect the visible ray that scintillator 20 sends, thus improve the efficiency of ray detector 100 detected ray, sensitivity and resolution characteristic further.
In some embodiments, be filled with working gas respectively in the first resistive plate room 11 and the second resistive plate room 12, and the pressure of working gas is an atmospheric pressure.
Setting like this, under the electronic action that the first photocathode 31 or the second photocathode 32 send, working gas ionizes out more times grade of electronics, forms snowslide, increases the induction current that electronic secondary produces.
Further, working gas can be the gas such as freon or xenon, and this type of gas can ionize out electronic secondary and form snowslide under the effect of electronics.
In some embodiments, first resistive plate room 11 also comprises the 3rd electrode glass 111b and the first carbon film 112,3rd electrode glass 111b to be located within the first resistive plate room 11 and to be parallel to each other with the first electrode glass 111a, and the first carbon film 112 is located on the surface of the 3rd electrode glass 111b away from the first photocathode 31.First carbon film 112 and the first photocathode 31 are added with the generating positive and negative voltage being greater than 1000V respectively, and the resistivity under the first electrode glass 111a and the second electrode glass 121a normal temperature is greater than 10
12Ω .cm.
Second resistive plate room 12 also comprises the 4th electrode glass 121b and the second carbon film 122,4th electrode glass 121b is located at the second inside, resistive plate room 12 and is parallel to each other with the second electrode glass 121a, and the second carbon film 122 is located on the surface of the 4th electrode glass 121b away from the second photocathode 32.Second carbon film 122 and the second photocathode 32 are added with the generating positive and negative voltage being greater than 1000V respectively, and the resistivity under the second electrode glass 121a and the 4th electrode glass 121b normal temperature is greater than 10
12Ω .cm.
Setting like this, can make to form electric field between the first electrode glass 111a and the 3rd electrode glass 111b, under the effect of electric field, the electronic energy that the first photocathode 31 sends obtains high-energy, makes the working gas in the first resistive plate room 11 ionize out electronic secondary and forms snowslide.In like manner, the working gas in the second resistive plate room 12 also can ionize out electronic secondary and form snowslide.
In some embodiments, the first resistive plate room 11 also comprises the first sensing circuit 114 plate and the first electronics circuit 115, first sensing circuit 114 plate and the first electronics circuit 115 and is located at the first carbon film 112 successively away from the first photocathode 31 on the surface.Second resistive plate room 12 also comprises the second sensing circuit 124 plate and the second electronics circuit 125, second sensing circuit 124 plate and the second electronics circuit 125 and is located at the second carbon film 122 successively away from the second photocathode 32 on the surface.
Setting like this, first sensing circuit 114 plate and the second sensing circuit 124 plate can induce the electric current of the formation of electronic secondary, induction current, through digitized processing such as the first electronics circuit 115 and the second electronics circuit 125 amplifies, examinations, just can obtain energy and the strength information of incident ray.
In some embodiments, the shell of resistive plate room 10 is seal box 13, is respectively arranged with the first sealed insulation block 116 and the second sealed insulation block 126 between seal box 13 and the first electrode glass 111a and the second electrode glass 121a.Such setting can make the first resistive plate room 11 and the second resistive plate room 12 be a complete hermetic cavity, can prevent the working gas leakage in the first resistive plate room 11 and the second resistive plate room 12, thus affect the serviceability of ray detector 100.
First dielectric film 113 is set between the first carbon film 112 and the first sensing circuit 114 plate, the second dielectric film 123, first dielectric film 113 is set between the second carbon film 122 and the second sensing circuit 124 plate and the second dielectric film 123 can be Mylar film.So, the first sensing circuit 114 plate and the second sensing circuit 124 plate can be avoided directly to contact with high pressure respectively, prevent the first sensing circuit 114 plate and second circuit board to be damaged.
The course of work of ray detector 100 is as follows: for the first resistive plate room 11, and working gas is sealed in the first resistive plate room 11, and the first electrode glass 111a in the first resistive plate room 11 and the 3rd electrode glass 111b is arranged in parallel.First carbon film 112 and the first photocathode 31 add positive or negative high voltage respectively, and under the effect of high pressure, the gas space in the first resistive plate room 11 forms a stronger electric field, and the field intensity in gas can reach 10
4more than V/cm.People is when having a physical examination, the ray sent from human tissue organ is got to the scintillator 20 of ray detector 100, scintillator 20 is excited to send visible ray, visible ray gets electronics through the first electrode glass 111a on the first photocathode 31, electronics accelerates to obtain sufficiently high energy under highfield effect, and electrons and gas molecule effect ionize out electronic secondary.Under the effect of electric field, the electronic secondary ionized out forms snowslide in gas, and an electrons produces 10
7-10
8individual electronic secondary, can induce electric current, the digitized processing such as induction current is amplified by the first electronics circuit 115, examination in electronic secondary anode motion process, thus obtain energy and the strength information of incident ray on the first sensing circuit 114 plate.The course of work of the second resistive plate room 12 and the course of work of the first resistive plate room 11 similar.By the information that the information superposition that the first electronics circuit 115 and the second electronics circuit 125 obtain is total incident ray.
In the description of this instructions, specific features, structure, material or feature that the description of reference term " embodiment ", " some embodiments ", " exemplary embodiment ", " example ", " concrete example " or " some examples " etc. means to describe in conjunction with described embodiment or example are contained at least one embodiment of the present utility model or example.In this manual, identical embodiment or example are not necessarily referred to the schematic representation of above-mentioned term.And the specific features of description, structure, material or feature can combine in an appropriate manner in any one or more embodiment or example.
Although illustrate and described embodiment of the present utility model, those having ordinary skill in the art will appreciate that: can carry out multiple change, amendment, replacement and modification to these embodiments when not departing from principle of the present utility model and aim, scope of the present utility model is by claim and equivalents thereof.
Claims (4)
1. a ray detector, is characterized in that, comprising:
Resistive plate room, the second resistive plate room comprising the first resistive plate room and be connected with described first resistive plate room; Described first resistive plate room comprises the first electrode glass, and described second resistive plate room comprises the second electrode glass;
Be located at the scintillator between described first resistive plate room and described second resistive plate room; And
Photocathode, comprises the first photocathode and the second photocathode;
Described first photocathode is located on described first electrode glass; Described second photocathode is located on described second electrode glass.
2. ray detector as claimed in claim 1, it is characterized in that, described first photocathode is located at described first resistive plate chamber interior, and with described first electrode glass surface contact; Described second photocathode is located at described second resistive plate chamber interior, and with described second electrode glass surface contact.
3. ray detector as claimed in claim 1, it is characterized in that, described scintillator is arranged on described first electrode glass and described second electrode glass.
4. ray detector as claimed in claim 1, it is characterized in that, described first resistive plate room also comprises the 3rd electrode glass and the first carbon film, described 3rd electrode glass is located at described first resistive plate chamber interior and is parallel to each other with described first electrode glass, and described first carbon film is located on the surface of described 3rd electrode glass away from described first photocathode;
Described second resistive plate room also comprises the 4th electrode glass and the second carbon film, described 4th electrode glass is located at described second resistive plate chamber interior and is parallel to each other with described second electrode glass, and described second carbon film is located on the surface of described 4th electrode glass away from described second photocathode;
Described first carbon film and described second carbon film are added with the positive voltage being greater than 1000V respectively, and described first photocathode and described second photocathode are added with the negative voltage being greater than 1000V respectively; Resistivity under described first electrode glass, the second electrode glass, the 3rd electrode glass and described 4th electrode glass normal temperature is greater than 10
12Ω .cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520374210.7U CN204740348U (en) | 2015-06-03 | 2015-06-03 | Ray detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520374210.7U CN204740348U (en) | 2015-06-03 | 2015-06-03 | Ray detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204740348U true CN204740348U (en) | 2015-11-04 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520374210.7U Withdrawn - After Issue CN204740348U (en) | 2015-06-03 | 2015-06-03 | Ray detector |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104950323A (en) * | 2015-06-03 | 2015-09-30 | 清华大学 | Ray detector |
| CN105301625A (en) * | 2015-11-09 | 2016-02-03 | 清华大学 | Fast time response ray detector |
-
2015
- 2015-06-03 CN CN201520374210.7U patent/CN204740348U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104950323A (en) * | 2015-06-03 | 2015-09-30 | 清华大学 | Ray detector |
| CN104950323B (en) * | 2015-06-03 | 2017-09-22 | 清华大学 | Ray detector |
| CN105301625A (en) * | 2015-11-09 | 2016-02-03 | 清华大学 | Fast time response ray detector |
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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 | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 100084 Haidian District 100084-82 mailbox Beijing Patentee after: Tsinghua University Patentee after: HEBEI TIANDI WISDOM MEDICAL EQUIPMENT CO., LTD. Address before: 100084 Haidian District 100084-82 mailbox Beijing Patentee before: Tsinghua University Patentee before: The world, Hebei intelligent medical treatment equipment company limited |
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| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20151104 Effective date of abandoning: 20170922 |