CN113252714A - Structure and dual-energy CT detector with filtering and anti-scattering - Google Patents
Structure and dual-energy CT detector with filtering and anti-scattering Download PDFInfo
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- CN113252714A CN113252714A CN202110662254.XA CN202110662254A CN113252714A CN 113252714 A CN113252714 A CN 113252714A CN 202110662254 A CN202110662254 A CN 202110662254A CN 113252714 A CN113252714 A CN 113252714A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N23/00—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
- G01N23/02—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material
- G01N23/04—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material and forming images of the material
- G01N23/046—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material and forming images of the material using tomography, e.g. computed tomography [CT]
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21F—PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR
- G21F1/00—Shielding characterised by the composition of the materials
- G21F1/02—Selection of uniform shielding materials
- G21F1/08—Metals; Alloys; Cermets, i.e. sintered mixtures of ceramics and metals
- G21F1/085—Heavy metals or alloys
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21F—PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR
- G21F3/00—Shielding characterised by its physical form, e.g. granules, or shape of the material
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2223/00—Investigating materials by wave or particle radiation
- G01N2223/03—Investigating materials by wave or particle radiation by transmission
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2223/00—Investigating materials by wave or particle radiation
- G01N2223/10—Different kinds of radiation or particles
- G01N2223/101—Different kinds of radiation or particles electromagnetic radiation
- G01N2223/1016—X-ray
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2223/00—Investigating materials by wave or particle radiation
- G01N2223/30—Accessories, mechanical or electrical features
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2223/00—Investigating materials by wave or particle radiation
- G01N2223/30—Accessories, mechanical or electrical features
- G01N2223/313—Accessories, mechanical or electrical features filters, rotating filter disc
Abstract
The invention relates to the technical field of detectors, in particular to a structure with filtering and anti-scattering functions and a dual-energy CT detector, wherein the structure with filtering and anti-scattering functions comprises a supporting seat; the detector plate is arranged on the supporting seat; multiple rows of the high-energy crystals and multiple rows of the low-energy crystals are arranged on the detector plate in parallel at intervals, and the high-energy crystals and the low-energy crystals are arranged at intervals; the supporting plate is arranged on the supporting seat, a plurality of rows of first grooves are formed in the lower end face of the supporting plate, the first grooves correspond to the high-energy crystals one by one, and the high-energy crystals are located in the first grooves; the filter is arranged on the bottom surface of the first groove and is attached to the upper end surface of the high-energy crystal; and the first anti-scattering sheet is arranged on the side wall surface of the first groove. The invention can prevent scattered rays from irradiating the high-energy crystal, eliminate the influence on the high-energy crystal and reduce the cost.
Description
Technical Field
The invention relates to the technical field of detectors, in particular to a structure with filtering and anti-scattering functions and a dual-energy CT detector.
Background
At present, the single-energy CT (Computed Tomography) only images the shape of a substance, and cannot realize the identification of the composition of the substance. The dual-energy CT can analyze the atomic number and the electron density of a substance through two groups of different energies, and further judge the components of the substance.
At present, the methods for realizing dual-energy CT mainly comprise 3 methods, one method is to continuously control X-rays with different energies emitted by a ray source; the second method is that two different ray sources respectively emit X rays with different energies; the other is that high-energy crystals and low-energy crystals with different energy responses are distributed on the detector at the same time, a filter is placed in front of the high-energy crystals, and the low-energy rays are filtered by the filter to leave the high-energy rays.
However, these 3 methods have respective disadvantages: the mode of continuously controlling the ray source to emit X rays with different energies has great influence on the service life of the ray source, and the corresponding technical requirement is high; the cost is high by using two groups of ray sources and detectors; although the structure of the detector is simple due to the mode of arranging the high-energy crystal and the low-energy crystal at the same time, effective filtering on the high-energy crystal is a difficult point of design.
One implementation form for the third way is: high energy crystal and low energy crystal all place the filter plate in circuit board one side on the collimater that the top of high energy crystal corresponds, but because there is the gap between collimater and detector crystal, the filter plate can only be to the ray filtering of coming to the top, the scattered ray of coming from the side still can shine on the high energy crystal to influence its signal, though can eliminate the ray of coming to the side through using two-dimensional collimator, but two-dimensional collimator cost is higher, seriously influences the cost of product.
Therefore, a structure with filtering and anti-scattering and a dual-energy CT detector are needed to solve the above technical problems.
Disclosure of Invention
The invention aims to provide a structure with filtering and anti-scattering functions and a dual-energy CT detector, which can prevent scattered rays from irradiating high-energy crystals, eliminate the influence on the high-energy crystals and reduce the cost.
In order to achieve the purpose, the invention adopts the following technical scheme:
a structure with filtering and anti-scattering comprising:
a supporting seat;
the detector plate is arranged on the supporting seat;
multiple rows of high-energy crystals and multiple rows of low-energy crystals, wherein the multiple rows of high-energy crystals and the multiple rows of low-energy crystals are arranged on the detector plate at intervals in parallel, and the high-energy crystals and the low-energy crystals are arranged at intervals;
the supporting plate is arranged on the supporting seat, a plurality of rows of first grooves are formed in the lower end face of the supporting plate, the first grooves correspond to the high-energy crystals one by one, and the high-energy crystals are located in the first grooves;
the filter is arranged on the bottom surface of the first groove and is attached to the upper end surface of the high-energy crystal;
and the first anti-scattering sheet is arranged on the side wall surface of the first groove.
Further, the lower terminal surface of backup pad be provided with the parallel interval of first recess sets up the second recess, the second recess with low energy crystal one-to-one sets up, low energy crystal is located in the second recess.
Furthermore, a second anti-scattering sheet is arranged on the side wall of the second groove.
Furthermore, the detector also comprises a one-dimensional collimator, wherein the one-dimensional collimator is arranged on the supporting seat, and the supporting plate and the detector plate are both positioned between the one-dimensional collimator and the supporting seat.
Furthermore, a first positioning groove is formed in the supporting seat, and the detector plate is located in the first positioning groove.
Furthermore, a second positioning groove communicated with the first positioning groove is formed in the supporting seat, the second positioning groove is located below the first positioning groove, an anti-scattering plate is arranged in the second positioning groove, and the anti-scattering plate and the detector plate are arranged in parallel at intervals.
Furthermore, a first positioning protrusion is arranged on the upper end face of the detector plate, a second positioning protrusion is arranged on the one-dimensional collimator, and the support plate is clamped between the first positioning protrusion and the second positioning protrusion.
Furthermore, one side of the supporting seat, which is deviated from the detector plate, is provided with a supporting bulge.
Furthermore, the supporting bulges are arranged on the supporting seat at intervals.
A dual energy CT detector comprising a structure as described above with filtering and anti-scatter.
The invention has the beneficial effects that:
the invention provides a structure with filtering and anti-scattering functions, wherein a detector plate is arranged on a supporting seat, a plurality of rows of high-energy crystals and low-energy crystals are arranged on the upper end surface of the detector plate, a supporting plate covers the high-energy crystals, a filtering sheet and a first anti-scattering sheet which are attached to the high-energy crystals are arranged in a first groove of the supporting plate, a two-dimensional collimator is not needed, all rays received by the high-energy crystals are high-energy signals passing through the filtering sheet, the first anti-scattering sheet is arranged on the side surface of the high-energy crystals, scattered rays can be prevented from irradiating the side surface of the high-energy crystals, the scattered rays can be prevented from irradiating the high-energy crystals, the influence on the high-energy crystals is eliminated, and the cost is reduced.
The dual-energy CT detector provided by the invention comprises the structure with filtering and anti-scattering functions, and can prevent scattered rays from irradiating the side surface of the high-energy crystal, so that the scattered rays can be prevented from irradiating the high-energy crystal, the influence on the high-energy crystal is eliminated, and the cost is reduced.
Drawings
FIG. 1 is a schematic diagram of a structure having filtering and anti-scatter features of the present invention;
FIG. 2 is a front view of a structure having filtering and anti-scattering features in accordance with the present invention;
fig. 3 is a partially enlarged view of a portion a in fig. 2.
In the figure:
1. a supporting seat; 11. a support boss; 2. a detector board; 21. high energy crystals; 22. a low energy crystal; 23. a first positioning projection; 3. a support plate; 31. a first groove; 311. a filter plate; 312. a first anti-scattering sheet; 32. a second groove; 321. a second anti-scattering sheet; 4. a one-dimensional collimator; 41. a second positioning projection; 5. an anti-scatter plate.
Detailed Description
The technical scheme of the invention is further explained by combining the attached drawings and the embodiment. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some but not all of the elements associated with the present invention are shown in the drawings.
In the description of the present invention, it should be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection or a removable connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
To prevent scattered radiation from being irradiated to the side surface of a high-energy crystal, thereby preventing the scattered radiation from being irradiated to the high-energy crystal, eliminating the influence on the high-energy crystal, and reducing the cost. As shown in fig. 1-3, the present invention provides a structure with filtering and anti-scattering. This structure with filtering and anti-scatter includes: the detector comprises a supporting seat 1, a detector plate 2, a plurality of rows of high-energy crystals 21, a plurality of rows of low-energy crystals 22, a supporting plate 3, a filter 311 and a first anti-scattering sheet 312.
Wherein, the detector plate 2 is arranged on the supporting seat 1; multiple rows of high-energy crystals 21 and multiple rows of low-energy crystals 22 are arranged on the detector plate 2 at intervals in parallel, and the high-energy crystals 21 and the low-energy crystals 22 are arranged at intervals; the supporting plate 3 is arranged on the supporting seat 1, a plurality of rows of first grooves 31 are formed in the lower end face of the supporting plate 3, the first grooves 31 correspond to the high-energy crystals 21 one by one, and the high-energy crystals 21 are located in the first grooves 31; the filter 311 is arranged on the bottom surface of the first groove 31 and is attached to the upper end surface of the high-energy crystal 21; the first anti-scattering sheet 312 is disposed on the sidewall surface of the first recess 31.
In particular, the support plate 3 is made of low-density carbon fiber or polyester and the like, so that attenuation of X-rays when passing through is small, and influence on data collection of the detector is small. The first anti-scattering sheet 312 is made of tungsten, lead, copper, aluminum, or other filtering materials.
Further, the lower end surface of the support plate 3 is provided with second grooves 32 arranged parallel to the first grooves 31 at intervals, the second grooves 32 are arranged in one-to-one correspondence with the low energy crystals 22, and the low energy crystals 22 are located in the second grooves 32. Specifically, a plurality of ridges are convexly arranged on the lower end surface of the supporting plate 3 at intervals in parallel, and a first groove 31 and a second groove 32 are formed between the adjacent ridges. The high-energy crystal 21 and the low-energy crystal 22 are positioned conveniently by arranging the first groove 31 and the second groove 32, and the filter 311 and the first anti-scattering sheet 312 are installed conveniently by arranging the first groove 31.
Further, a second anti-scattering sheet 321 is disposed on the sidewall of the second groove 32. The second anti-scattering sheet 321 is provided to prevent the side of the low energy crystal 22 from being irradiated with the scattering line, thereby affecting the performance of the low energy crystal 22.
Further, still include one-dimensional collimator 4, one-dimensional collimator 4 sets up on supporting seat 1, and backup pad 3 and detector board 2 all are located between one-dimensional collimator 4 and supporting seat 1. The radiation emitted from the sample and irradiated onto the high-energy crystal 21 and the low-energy crystal 22 is made into a parallel beam by arranging the one-dimensional collimator 4.
Furthermore, a first positioning groove is formed in the supporting seat 1, and the detector plate 2 is located in the first positioning groove. Through seting up first constant head tank, be convenient for install detector board 2 on supporting seat 1, fix a position detector board 2 simultaneously.
Furthermore, a second positioning groove communicated with the first positioning groove is formed in the supporting seat 1, the second positioning groove is located below the first positioning groove, an anti-scattering plate 5 is arranged in the second positioning groove, and the anti-scattering plate 5 and the detector plate 2 are arranged in parallel at intervals. Specifically, in the present embodiment, the pseudo-scattering plate is a lead plate, and in other embodiments, the pseudo-scattering plate may also be made of tungsten or other anti-scattering materials, which is not limited herein. By providing the anti-scattering plate 5, it is possible to prevent scattered radiation below the high-energy crystal 21 and the low-energy crystal 22 from being irradiated onto the high-energy crystal 21 and the low-energy crystal 22 through below, affecting the high-energy crystal 21 and the low-energy crystal 22.
Furthermore, a first positioning protrusion 23 is disposed on an upper end surface of the detector plate 2, a second positioning protrusion 41 is disposed on the one-dimensional collimator 4, and the support plate 3 is clamped between the first positioning protrusion 23 and the second positioning protrusion 41. Through setting up first location arch 23 and second location arch 41, be convenient for press from both sides and establish backup pad 3 to guarantee that backup pad 3 installs stably firm.
Further, one side of the support base 1 facing away from the detector plate 2 is provided with a support protrusion 11. In this embodiment, a plurality of supporting protrusions 11 are disposed on the supporting base 1 at intervals. The stability of the support seat 1 is ensured by being provided with a plurality of support protrusions 11.
The embodiment also provides a dual-energy CT detector, which comprises the structure with filtering and anti-scattering functions, and can prevent scattered rays from irradiating the side surface of the high-energy crystal 21, thereby preventing the scattered rays from irradiating the high-energy crystal 21, eliminating the influence on the high-energy crystal 21 and reducing the cost.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (10)
1. A structure having filtering and anti-scattering properties, comprising:
a support base (1);
the detector plate (2), the detector plate (2) is arranged on the supporting seat (1);
multiple rows of high-energy crystals (21) and multiple rows of low-energy crystals (22), wherein the multiple rows of high-energy crystals (21) and the multiple rows of low-energy crystals (22) are arranged on the detector plate (2) in parallel at intervals, and the high-energy crystals (21) and the low-energy crystals (22) are arranged at intervals;
the support plate (3) is arranged on the support seat (1), a plurality of rows of first grooves (31) are formed in the lower end face of the support plate (3), the first grooves (31) and the high-energy crystals (21) are arranged in a one-to-one correspondence mode, and the high-energy crystals (21) are located in the first grooves (31);
the filter (311) is arranged on the bottom surface of the first groove (31) and is attached to the upper end surface of the high-energy crystal (21);
and a first anti-scattering sheet (312) provided on a side wall surface of the first groove (31).
2. A structure with filtering and anti-scattering according to claim 1, characterized in that the lower end face of the support plate (3) is provided with second grooves (32) arranged parallel to and spaced from the first grooves (31), the second grooves (32) being arranged in one-to-one correspondence with the low energy crystals (22), the low energy crystals (22) being located in the second grooves (32).
3. A structure with filtering and anti-scattering according to claim 2, characterized in that the second anti-scattering sheet (321) is arranged on the side wall of the second groove (32).
4. A structure with filtering and anti-scattering according to claim 1, characterized by further comprising a one-dimensional collimator (4), the one-dimensional collimator (4) being arranged on the support base (1), the support plate (3) and the detector plate (2) being both located between the one-dimensional collimator (4) and the support base (1).
5. The structure with filtering and anti-scattering functions as claimed in claim 1, wherein the supporting base (1) is provided with a first positioning groove, and the detector plate (2) is located in the first positioning groove.
6. The structure with filtering and anti-scattering functions as claimed in claim 5, wherein the supporting base (1) is provided with a second positioning slot communicated with the first positioning slot, the second positioning slot is located below the first positioning slot, an anti-scattering plate (5) is disposed in the second positioning slot, and the anti-scattering plate (5) and the detector plate (2) are arranged in parallel at intervals.
7. The structure with filtering and anti-scattering functions as claimed in claim 4, wherein the upper end face of the detector plate (2) is provided with a first positioning protrusion (23), the one-dimensional collimator (4) is provided with a second positioning protrusion (41), and the support plate (3) is sandwiched between the first positioning protrusion (23) and the second positioning protrusion (41).
8. A structure with filtering and anti-scattering properties according to claim 1, characterized in that the side of the support base (1) facing away from the detector plate (2) is provided with support protrusions (11).
9. A structure with filtering and anti-scattering functions as claimed in claim 8, characterized in that said supporting protrusions (11) are arranged on said supporting seat (1) at intervals.
10. A dual energy CT detector comprising a structure with filtering and anti-scatter according to any of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110662254.XA CN113252714A (en) | 2021-06-15 | 2021-06-15 | Structure and dual-energy CT detector with filtering and anti-scattering |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110662254.XA CN113252714A (en) | 2021-06-15 | 2021-06-15 | Structure and dual-energy CT detector with filtering and anti-scattering |
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| CN113252714A true CN113252714A (en) | 2021-08-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110662254.XA Pending CN113252714A (en) | 2021-06-15 | 2021-06-15 | Structure and dual-energy CT detector with filtering and anti-scattering |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113740357A (en) * | 2021-08-25 | 2021-12-03 | 江苏尚飞光电科技股份有限公司 | Novel X-ray dual-energy detector and imaging method and imaging system thereof |
| CN116031271A (en) * | 2023-03-28 | 2023-04-28 | 上海奕瑞光电子科技股份有限公司 | Pseudo three-energy detector and preparation method thereof |
| CN116046815A (en) * | 2023-02-21 | 2023-05-02 | 上海福柯斯智能科技有限公司 | Dual-energy CT imaging method, device and system |
-
2021
- 2021-06-15 CN CN202110662254.XA patent/CN113252714A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113740357A (en) * | 2021-08-25 | 2021-12-03 | 江苏尚飞光电科技股份有限公司 | Novel X-ray dual-energy detector and imaging method and imaging system thereof |
| CN116046815A (en) * | 2023-02-21 | 2023-05-02 | 上海福柯斯智能科技有限公司 | Dual-energy CT imaging method, device and system |
| CN116046815B (en) * | 2023-02-21 | 2023-11-03 | 上海福柯斯智能科技有限公司 | Dual-energy CT imaging method, device and system |
| CN116031271A (en) * | 2023-03-28 | 2023-04-28 | 上海奕瑞光电子科技股份有限公司 | Pseudo three-energy detector and preparation method thereof |
| CN116031271B (en) * | 2023-03-28 | 2023-07-28 | 上海奕瑞光电子科技股份有限公司 | Pseudo three-energy detector and preparation method thereof |
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