CN110664424A - Detector module and CT detector with same - Google Patents
Detector module and CT detector with same Download PDFInfo
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- CN110664424A CN110664424A CN201910940688.4A CN201910940688A CN110664424A CN 110664424 A CN110664424 A CN 110664424A CN 201910940688 A CN201910940688 A CN 201910940688A CN 110664424 A CN110664424 A CN 110664424A
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- 238000002591 computed tomography Methods 0.000 description 25
- 230000005855 radiation Effects 0.000 description 6
- 239000011159 matrix material Substances 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 229910004611 CdZnTe Inorganic materials 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- QWUZMTJBRUASOW-UHFFFAOYSA-N cadmium tellanylidenezinc Chemical compound [Zn].[Cd].[Te] QWUZMTJBRUASOW-UHFFFAOYSA-N 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003702 image correction Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
- A61B6/02—Arrangements for diagnosis sequentially in different planes; Stereoscopic radiation diagnosis
- A61B6/03—Computed tomography [CT]
- A61B6/032—Transmission computed tomography [CT]
- A61B6/035—Mechanical aspects of CT
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
- A61B6/42—Arrangements for detecting radiation specially adapted for radiation diagnosis
- A61B6/4266—Arrangements for detecting radiation specially adapted for radiation diagnosis characterised by using a plurality of detector units
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
- A61B6/42—Arrangements for detecting radiation specially adapted for radiation diagnosis
- A61B6/4291—Arrangements for detecting radiation specially adapted for radiation diagnosis the detector being combined with a grid or grating
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Abstract
The invention discloses a detector module and a CT detector with the same. The detector module comprises a support and a plurality of detector sub-modules arranged on the support, the detector sub-modules are arranged in rows on the support at least along a first direction, each detector sub-module is provided with a side portion facing a second direction and a top portion facing a third direction, the first direction, the second direction and the third direction are perpendicular to each other, the detector sub-modules at least comprise a first sub-module and a second sub-module, the size of the second sub-module is larger than that of the first sub-module in the second direction, the second sub-modules are arranged in the middle of the second sub-module in the first direction, and the first sub-modules are arranged on two sides of the second sub-module. The CT detector includes a plurality of the detector modules arranged side-by-side along a second direction. The detector module and the CT detector with the detector module can reduce splicing gaps among detector sub-modules and ensure effective acquisition of scanning data.
Description
Technical Field
The invention relates to the technical field of medical equipment, in particular to a detector module and a CT (computed tomography) detector with the same.
Background
With the development of CT (Computed Tomography) detection technology, the number of layers of a CT detector is increasing. In order to facilitate manufacturing and improve yield, a CT detector is usually formed by splicing a plurality of detector sub-modules in a matrix. In order to ensure consistent radiation attenuation characteristics of the detector sub-modules, the radiation receiving surfaces of the plurality of detector sub-modules arranged in a matrix form are usually arranged on a spherical surface, so that the distances from the radiation source focus to each detector sub-module are consistent, and subsequent image processing is facilitated.
As shown in fig. 1, for a square detector sub-module, when it needs to be spliced on a spherical surface, in order to ensure that the detector sub-modules 1 'located at the edges do not interfere, a large gap will appear at the detector sub-module 1' located at the middle during splicing. Particularly, as the number of layers of the CT detector increases, the number of detector sub-modules 1 'spliced in the Z direction increases, the reserved splicing gap between the detector sub-modules 1' in the middle increases, and when the gap is large to a certain extent, the data acquired by the CT detector affects the image quality.
In view of the above, the prior art needs to be improved to solve the above technical problems.
Disclosure of Invention
The invention provides a detector module and a CT detector with the same, which can reduce splicing gaps among detector sub-modules and ensure effective acquisition of scanning data.
In order to achieve the purpose, the invention is realized by the following technical scheme.
A detector module comprising a support and a plurality of detector sub-modules arranged on the support, the plurality of detector sub-modules being arranged in rows on the support at least along a first direction, each detector sub-module having a side facing a second direction and a top facing a third direction, the first, second and third directions being mutually perpendicular, wherein the plurality of detector sub-modules comprises at least a first sub-module and a second sub-module, the second sub-module having a size larger than the first sub-module in the second direction and the second sub-module being arranged in the middle in the first direction, the first sub-modules being arranged on both sides of the second sub-module.
As a further improved technical solution, the first sub-module and the second sub-module are both multiple.
As a further improved technical scheme, the first sub-module is symmetrically arranged at two sides of the second sub-module; or the number of the first sub-modules on the two sides of the second sub-module is different.
As a further improved technical solution, the plurality of detector sub-modules further include a third sub-module, in the second direction, the size of the third sub-module is larger than that of the second sub-module, and in the first direction, the third sub-module, the second sub-module, and the first sub-module are sequentially arranged from the middle to both sides.
As a further improved technical scheme, the top of the detector sub-modules is provided with a top surface, and the top surfaces of the plurality of detector sub-modules are tangent to the circumference of the same circle.
As a further improved technical scheme, a plurality of positioning surfaces are arranged on the support, the detector sub-module is installed on the positioning surfaces, and the positioning surfaces are tangent to the circumference of another circle.
As a further improved technical solution, circles tangent to the top surfaces of the plurality of detector sub-modules and circles tangent to the plurality of positioning surfaces are concentric circles.
The invention also provides a CT detector, which comprises a detector shell and a plurality of detector modules according to any one of the above technical schemes, wherein the plurality of detector modules are arranged side by side along the second direction.
As a further improved technical scheme, a plurality of detector sub-modules of the plurality of detector modules are arranged in an array, and top surfaces of the plurality of detector sub-modules are located on the same spherical surface.
In a further improved solution, the detector sub-modules are square, a plurality of detector sub-modules in the same detector module are arranged in an abutting manner, and gaps are formed between adjacent detector sub-modules in at least some adjacent detector modules.
According to the detector module provided by one embodiment of the invention, the first sub-module and the second sub-module which are different in size are arranged, so that the splicing gap between the sub-modules of the detector can be reduced, and the effective acquisition of scanning data is ensured; and the splicing gap is reduced, so that the layer number of the CT detector can be expanded, and the coverage range of the CT detector is enlarged.
Drawings
FIG. 1 is a schematic diagram of the arrangement of detector sub-modules in the prior art.
FIG. 2 is a perspective view of a detector module according to an embodiment of the invention.
FIG. 3 is a side view of a detector module according to one embodiment of the invention.
Fig. 4 is a perspective view of a stent in an embodiment of the invention.
FIG. 5 is a perspective view of a CT detector in accordance with an embodiment of the present invention.
The reference numbers illustrate: 1', 1-detector submodule; 100-a detector module; 11-a first submodule; 12-a second submodule; 101-top; 102-a side portion; 2-a scaffold; 21-a positioning surface; 3-connecting wires; 4-a circuit board; 50-a detector housing; 6-heat dissipation fan.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the invention, as detailed in the appended claims.
The detector module and the CT detector having the same according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.
Referring to fig. 2 to 4, a detector module 100 according to an embodiment of the present invention includes a support 2, and a plurality of detector sub-modules 1, a connecting line 3 and a circuit board 4 disposed on the support 2.
The detector sub-module 1 serves to convert the radiation rays into electrical signals. The detector submodule 1 includes a scintillator array, a photodiode, a substrate, and an AD conversion circuit. Wherein the scintillator array may be a matrix structure of 32X16 or 16X 16. The detector submodule 1 can also be simplified to include a scintillator array, photodiodes, and a substrate, and is additionally connected to an AD conversion circuit through a connector. The detector submodule 1 can also be made of cadmium zinc telluride crystals (CdZnTe, CZT).
The detector submodule 1 is electrically connected with a circuit board 4 through a connecting wire 3. The connecting lines 3 are used to transmit the digital or analog signals generated by the detector submodule 1 to the circuit board 4 and to supply the detector submodule 1 with power. The circuit board 4 is used for converting analog signals generated by the detector submodule 1 into digital signals and/or processing the digital signals and transmitting the digital signals to a communication system of the CT machine.
Referring to fig. 2, in the present embodiment, each of the detector sub-modules 1 is square, such as rectangular or square. The holder 2 is elongated and extends in a first direction. The first direction is the Z direction indicated in fig. 2, and it should be noted that the Z direction is the overall extending direction of the stent 2, and the stent 2 allows a certain change of the arc shape and the twisted shape during the extending process along the Z direction. For example, the holder 2 may have an arc shape curved in the X direction shown in fig. 2. The plurality of detector sub-modules 1 are arranged on the support 2 in the direction of extension of the support 2, i.e. the plurality of detector sub-modules 1 are arranged in a row in the first direction. After the detector sub-modules 1 are mounted on the support 2, each detector sub-module 1 has a side 102 facing in the second direction and a top 101 facing in the third direction. The second direction mentioned here is an X direction indicated in fig. 2, and the third direction is a Y direction indicated in fig. 2. The first direction, the second direction and the third direction are perpendicular to each other.
The plurality of detector sub-modules 1 at least include a first sub-module 11 and a second sub-module 12, the size of the second sub-module 12 is larger than that of the first sub-module 11 in the second direction, the second sub-module 12 is arranged in the middle in the first direction, and the first sub-modules 11 are arranged on two sides of the second sub-module 12. The first sub-module 11 and the second sub-module 12 are each provided in plurality. In this embodiment, the first sub-modules 11 are symmetrically arranged on two sides of the second sub-modules 12, and 4 second sub-modules 12 are arranged in the middle of the support 2; the number of the first sub-modules 11 is also 4, and 2 are arranged on two sides of the second sub-module 12 respectively. In other embodiments, the first sub-module 11 may also be disposed asymmetrically on both sides of the second sub-module 12, for example, the number of the first sub-modules 11 on both sides of the second sub-module 12 may be different. The dimension of the second sub-module 12 in the X direction is larger than the dimension of the first sub-module 11 in the X direction, preferably the distance that the second sub-module 12 protrudes out of the first sub-module 11 is equal on both sides in the X direction. Of course, it is also possible that one side of the second sub-module 12 in the X-direction is flush with the first sub-module 11, and the other side protrudes out of the first sub-module 11. By arranging the first sub-module 11 and the second sub-module 12 with different sizes, the splicing gap between the detector sub-modules 1 in the middle area can be reduced, and the effective acquisition of scanning data is ensured; and the splicing gap is reduced, so that the layer number of the CT detector can be expanded, and the coverage range of the CT detector is enlarged.
Further, the plurality of detector sub-modules may further include a third sub-module (not shown), in the second direction, the size of the third sub-module is larger than that of the second sub-module, and in the first direction, the third sub-module, the second sub-module, and the first sub-module are sequentially arranged from the middle to both sides. That is, three detector sub-modules of different sizes are arranged in an arrangement with decreasing size from the middle to both sides. Of course, the detector sub-modules with different sizes in the second direction are not limited to three, and may be four, five or more, and the plurality of detector sub-modules with different sizes are arranged in rows and arranged in an arrangement with gradually decreasing sizes from the middle to both sides. The arrangement of a plurality of detector sub-modules of different sizes can further reduce the stitching gap, so that the finally obtained image has better quality.
Referring to fig. 3, the top 101 of the detector sub-modules 1 has a top surface, and the top surfaces of the plurality of detector sub-modules 1 are tangent to the circumference of the same circle. The focus of the radiation source of the CT machine is arranged at the center of the circle. In this way the distance from the radiation source focus to the top surface of each detector sub-module 1 is uniform, facilitating post image correction.
Referring to fig. 4, the support 1 is provided with a plurality of positioning surfaces 21, the detector sub-module 1 is mounted on the positioning surfaces 21, and the positioning surfaces 21 are tangent to the circumference of another circle. The adjacent positioning surfaces 21 are arranged at intervals, and the detector sub-modules 1 are arranged on the two adjacent positioning surfaces 21 in a spanning mode when being installed on the positioning surfaces 21. The area between two adjacent locating surfaces 21 facilitates the connection of the connecting lines 3. The width of two positioning surfaces 21 at the two most sides is smaller than the width of the other positioning surfaces 21 in the two most sides. The two positioning surfaces 21 on the two sides are used for supporting one end of the detector sub-module 1 on the two sides, and the other positioning surfaces 21 located therein are used for supporting the two adjacent ends of the two adjacent detector sub-modules 1. The circles tangent to the top surfaces of the detector sub-modules 1 and the circles tangent to the positioning surfaces 21 are concentric circles. So set up, support 2 simple structure, a plurality of detector submodule 1 simple to operate. The detector submodule 1 can be fixed on the support 2 by means of gluing, screwing, snapping and the like.
Referring to fig. 5, a CT detector according to an embodiment of the present invention includes a detector housing 50, a plurality of detector modules 100 mounted in the detector housing 50, and a plurality of cooling fans 6 for cooling the detector modules 100. The plurality of detector modules 100 are arranged side by side along a second direction (i.e., the X-direction shown in fig. 5). A plurality of detector sub-modules 1 of the detector module 100 are arranged in an array, and the top surfaces of the plurality of detector sub-modules 1 are located on the same spherical surface. It should be noted that for detector sub-module 1 with a planar top surface, it is not possible for the entire area of the top surface to lie on a spherical surface. The top surface is located on the spherical surface, and means that the center of the top surface or other partial area of the top surface is tangent to the spherical surface. The detector sub-modules 1 are square, and a plurality of detector sub-modules 1 in the same detector module 100 are arranged in an attached manner, that is, in the Z direction, adjacent detector sub-modules 1 are arranged in an attached manner. In order to ensure that the detector sub-modules 1 at both ends in the Z direction do not interfere with each other, a gap is formed between adjacent detector sub-modules 1 in some adjacent detector modules 100, i.e., a gap is formed between some adjacent detector sub-modules 1 in the X direction. According to the technical scheme of the invention, the size of the second sub-module 12 in the middle in the X direction is set to be larger, so that the gap can be reduced, the effective acquisition of scanning data is ensured, and the image quality is not influenced. And the splicing gap is reduced, so that the layer number of the CT detector can be expanded, and the coverage range of the CT detector is enlarged. Compared with the conventional detector module 1 which can only be applied to a 128-layer CT detector, the technical scheme of the invention can expand the CT detector to 512 layers by reducing the splicing gap, thereby greatly increasing the coverage of the CT detector.
Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. A detector module comprising a support and a plurality of detector sub-modules arranged on the support, the plurality of detector sub-modules being arranged in rows on the support at least in a first direction, each detector sub-module having a side facing in a second direction and a top facing in a third direction, the first, second and third directions being mutually perpendicular, characterised in that the plurality of detector sub-modules comprises at least a first sub-module and a second sub-module, the second sub-module having a size larger than the first sub-module in the second direction and the second sub-module being arranged in the middle in the first direction, the first sub-modules being arranged on both sides of the second sub-module.
2. The detector module of claim 1, wherein the first sub-module and the second sub-module are each a plurality.
3. The detector module of claim 2, wherein the first sub-module is symmetrically disposed on both sides of the second sub-module; or the number of the first sub-modules on the two sides of the second sub-module is different.
4. The detector module of claim 1, wherein the plurality of detector sub-modules further includes a third sub-module having a size greater than a size of the second sub-module in the second direction, and wherein the third sub-module, the second sub-module, and the first sub-module are arranged in order from a middle portion to both sides in the first direction.
5. The detector module of any one of claims 1-4, wherein the top of the detector sub-module has a top surface, and the top surfaces of the plurality of detector sub-modules are tangent to a circumference of a same circle.
6. The detector module of claim 5, wherein the support has a plurality of locating surfaces on which the detector sub-modules are mounted, the plurality of locating surfaces being tangential to the circumference of another circle.
7. The detector module of claim 6, wherein the circles tangent to the top surfaces of the plurality of detector sub-modules and the circles tangent to the plurality of locating surfaces are concentric circles.
8. A CT detector comprising a detector housing and a plurality of detector modules according to any of claims 1 to 7, the plurality of detector modules being arranged side by side along a second direction.
9. The CT detector of claim 8, wherein a plurality of detector sub-modules of the plurality of detector modules are arranged in an array, and top surfaces of the plurality of detector sub-modules are located on a same spherical surface.
10. The CT detector of claim 8, wherein the detector sub-modules are square in shape, a plurality of detector sub-modules in a same detector module are abutted, and at least some of adjacent detector sub-modules in adjacent detector modules have gaps therebetween.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910940688.4A CN110664424B (en) | 2019-09-30 | 2019-09-30 | Detector module and CT detector with same |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910940688.4A CN110664424B (en) | 2019-09-30 | 2019-09-30 | Detector module and CT detector with same |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111227857A (en) * | 2020-01-22 | 2020-06-05 | 东软医疗系统股份有限公司 | Detector module, detector and CT equipment |
| CN111227858A (en) * | 2020-01-22 | 2020-06-05 | 东软医疗系统股份有限公司 | Detector module, detector and CT equipment |
| CN111227859A (en) * | 2020-01-22 | 2020-06-05 | 东软医疗系统股份有限公司 | Detector module, detector and CT equipment |
| CN111281406A (en) * | 2020-01-22 | 2020-06-16 | 东软医疗系统股份有限公司 | Scintillator pixel array, detector submodule, module, detector and CT device |
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| CN110664424B (en) | 2023-05-02 |
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