CN110664424B - Detector module and CT detector with same - Google Patents
Detector module and CT detector with same Download PDFInfo
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- CN110664424B CN110664424B CN201910940688.4A CN201910940688A CN110664424B CN 110664424 B CN110664424 B CN 110664424B CN 201910940688 A CN201910940688 A CN 201910940688A CN 110664424 B CN110664424 B CN 110664424B
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- 238000002591 computed tomography Methods 0.000 description 24
- 230000005855 radiation Effects 0.000 description 6
- 239000011159 matrix material Substances 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 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
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- QWUZMTJBRUASOW-UHFFFAOYSA-N cadmium tellanylidenezinc Chemical compound [Zn].[Cd].[Te] QWUZMTJBRUASOW-UHFFFAOYSA-N 0.000 description 1
- 230000008859 change Effects 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
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000003702 image correction Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012546 transfer 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 on the support at least in rows along a first direction, each detector sub-module is provided with a side part facing a second direction and a top part facing a third direction, the first direction, the second direction and the third direction are mutually 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 in the first direction, and the first sub-modules are arranged on two sides of the second sub-modules. 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 same can reduce the splicing gap between the detector sub-modules and ensure the 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 detector with the same.
Background
With the development of CT (Computed Tomography) detection technology, the number of layers of CT detectors is increasing. To facilitate manufacturing and improve yield, CT detectors are typically constructed from a plurality of detector sub-modules that are spliced in a matrix. In order to ensure that the radiation attenuation characteristics of the detector sub-modules are consistent, the radiation receiving surfaces Chang Bu of the plurality of detector sub-modules arranged in a matrix form are arranged on a spherical surface, so that the distances from the focal point of the radiation source 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 is 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 occur at the detector sub-modules 1' located at the middle when spliced. Particularly, as the number of layers of the CT detector increases, the more detector sub-modules 1 'are spliced in the Z direction, the larger the reserved splicing gaps between the detector sub-modules 1' in the middle are, and when the gaps are large to a certain extent, the image quality will be affected by the data acquired by the CT detector.
In view of this, 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 submodules and ensure effective acquisition of scanning data.
In order to achieve the above purpose, the present invention is achieved 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 direction, the second direction and the third direction being mutually perpendicular to each other, wherein the plurality of detector sub-modules comprises at least a first sub-module and a second sub-module in the second direction, the second sub-module having a size larger than the first sub-module and in the first direction, the second sub-module being arranged in the middle, the first sub-module being arranged on both sides of the second sub-module.
As a further improved technical scheme, the first sub-module and the second sub-module are multiple.
As a further improved technical scheme, the first submodule is symmetrically arranged at two sides of the second submodule; or the first sub-module is unequal in number on both sides of the second sub-module.
As a further improved technical scheme, the plurality of detector sub-modules further comprises 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 part to two sides.
As a further improvement, the top of the detector sub-module is provided with a top surface, and the top surfaces of the plurality of detector sub-modules are tangential to the circumference of the same circle.
As a further improved technical scheme, a plurality of locating surfaces are arranged on the support, the detector submodules are arranged on the locating surfaces, and the locating surfaces are tangential to the circumference of another circle.
As a further improved technical scheme, 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 comprising a detector housing and a plurality of detector modules as described in any of the above claims, the plurality of detector modules being arranged side by side in a 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 the top surfaces of the plurality of detector sub-modules are positioned on the same spherical surface.
As a further development, the detector sub-modules are square, a plurality of detector sub-modules in the same detector module are arranged in a manner that they lie against each other, and a gap is provided between adjacent detector sub-modules in at least some adjacent detector modules.
According to the detector module provided by the embodiment of the invention, the splicing gap between the detector sub-modules can be reduced by arranging the first sub-module and the second sub-module with different sizes, so that the effective acquisition of scanning data is ensured; and the number of layers of the CT detector can be expanded due to the reduction of the splicing gap, so that the coverage range of the CT detector is enlarged.
Drawings
Fig. 1 is a schematic diagram of the arrangement principle of a detector sub-module 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 an embodiment of the invention.
Fig. 4 is a perspective view of a stent in an embodiment of the present invention.
Fig. 5 is a perspective view of a CT detector according to an embodiment of the present invention.
Reference numerals illustrate: 1', 1-detector sub-modules; a 100-detector module; 11-a first sub-module; 12-a second sub-module; 101-top; 102-side; 2-a bracket; 21-positioning surface; 3-connecting lines; 4-a circuit board; 50-a detector housing; 6-a heat radiation fan.
Detailed Description
Reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with the invention. Rather, they are merely examples of apparatus and methods consistent with aspects of the invention as detailed in the accompanying claims.
The detector module and the CT detector with the detector module 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, connecting wires 3 and a circuit board 4 disposed on the support 2.
The detector sub-module 1 is arranged to convert radiation rays into electrical signals. The detector submodule 1 comprises a scintillator array, photodiodes, a substrate and an AD conversion circuit. Wherein the scintillator array may be a 32X16 or 16X16 matrix structure. The detector sub-module 1 may 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 sub-module 1 can also be made of cadmium zinc telluride crystals (CdZnTe, CZT).
The detector sub-module 1 is electrically connected with the circuit board 4 through the connecting wire 3. The connection lines 3 are used to transfer digital or analog signals generated by the detector sub-module 1 to the circuit board 4 while powering the detector sub-module 1. The circuit board 4 is used for converting the analog signals generated by the detector sub-module 1 into digital signals and/or processing the digital signals for transmission to a communication system of the CT machine.
Referring to fig. 2, in this embodiment, each of the detector sub-modules 1 has a square shape, for example, a rectangular shape or a square shape. The support 2 is elongated and extends in a first direction. The first direction is the Z direction indicated in fig. 2, and it should be further noted that the Z direction is the overall extending direction of the bracket 2, and the bracket 2 allows a certain arc-shaped and twisted shape change during the extending process along the direction. For example, the bracket 2 may be curved in 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 along the extension direction 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 rack 2, each of the detector sub-modules 1 has a side 102 facing in the second direction and a top 101 facing in the third direction. The second direction is the X direction indicated in fig. 2, and the third direction is the 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 includes a first sub-module 11 and a second sub-module 12, in the second direction, the second sub-module 12 has a larger size than the first sub-module 11, and in the first direction, the second sub-module 12 is arranged in the middle, and the first sub-module 11 is arranged on both sides of the second sub-module 12. The number of the first sub-module 11 and the second sub-module 12 is plural. In this embodiment, the first sub-modules 11 are symmetrically disposed on two sides of the second sub-modules 12, and the number of the second sub-modules 12 is 4 and arranged in the middle of the bracket 2; the number of the first sub-modules 11 is also 4, and 2 are respectively arranged at two sides of the second sub-module 12. In other embodiments, the first sub-module 11 may 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 is not equal. 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, and preferably the distances of the two sides of the second sub-module 12 protruding out of the first sub-module 11 in the X direction are equal. 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 beyond 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 number of layers of the CT detector can be expanded due to the reduction of the splicing gap, so that 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 third sub-module may have a size 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 may be sequentially arranged from the middle to the two sides. That is, three different sizes of detector sub-modules are provided and arranged in a gradually decreasing size from the middle to the two sides. Of course, the detector sub-modules having different sizes in the second direction are not limited to three, but may be four, five or more, and the plurality of detector sub-modules having different sizes are arranged in a row with an arrangement gradually decreasing in size from the middle to both sides. By arranging a plurality of detector sub-modules with different sizes, the splicing gap can be further reduced, so that the quality of the finally obtained image is better.
Referring to fig. 3, the top 101 of the detector sub-module 1 has a top surface, and the top surfaces of the plurality of detector sub-modules 1 are tangential 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. The distance from the source focus to the top surface of each detector sub-module 1 is thus uniform, facilitating later image correction.
Referring to fig. 4, the support 1 is provided with a plurality of positioning surfaces 21, the detector sub-modules 1 are mounted on the positioning surfaces 21, and the positioning surfaces 21 are tangential 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 straddling manner when being arranged on the positioning surfaces 21. The area between two adjacent positioning surfaces 21 facilitates the connection of the connecting wire 3. The width of the two positioning surfaces 21 located at the two most sides is smaller than the width of the other positioning surfaces 21 located therein. 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 in the two positioning surfaces are used for supporting two adjacent ends of the two adjacent detector sub-modules 1. Circles tangent to the top surfaces of the plurality of detector sub-modules 1 and circles tangent to the plurality of positioning surfaces 21 are concentric circles. So set up, support 2 simple structure, a plurality of detector sub-module 1 simple to operate. The detector sub-module 1 may be fixed to the support 2 by means of an adhesive, screw, snap-on connection or 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 heat dissipation fans 6 for dissipating heat from the detector modules 100. The plurality of detector modules 100 are arranged side by side in a second direction (i.e., the X-direction shown in fig. 5). The plurality of detector sub-modules 1 of the plurality of detector modules 100 are arranged in an array, and the top surfaces of the plurality of detector sub-modules 1 are positioned on the same sphere. It should be noted that, with the top surface of the detector sub-module 1 being planar, it is not possible that all areas of the top surface lie on a sphere. The term "top surface" as used herein is located on a sphere, and means that the center of the top surface or other partial area of the top surface is tangential to the sphere. The detector sub-modules 1 are square, and a plurality of detector sub-modules 1 in the same detector module 100 are arranged in a leaning manner, namely, adjacent detector sub-modules 1 are arranged in a leaning manner in the Z direction. In order to satisfy that the detector sub-modules 1 at both ends in the Z-direction do not interfere, there is a gap between adjacent ones of the detector sub-modules 1 in part adjacent to each other, i.e., in the X-direction, there is a gap between the detector sub-modules 1 in part adjacent to each other. According to the technical scheme, the second sub-module 12 positioned in the middle is set to be larger in the X direction, so that the gap can be reduced, the effective acquisition of scanning data is ensured, and the image quality is not affected. And the number of layers of the CT detector can be expanded due to the reduction of the splicing gap, so that the coverage range of the CT detector is enlarged. Compared with the existing 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 range of the CT detector.
The present invention is not limited to the above-mentioned embodiments, but is not limited to the above-mentioned embodiments, and any simple modification, equivalent changes and modification made to the above-mentioned embodiments according to the technical matters of the present invention can be made by those skilled in the art without departing from the scope of the present invention.
Claims (10)
1. A detector module comprising a carrier and a plurality of detector sub-modules arranged on the carrier in a row 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 to each other, characterized in that the plurality of detector sub-modules comprises at least a first sub-module and a second sub-module, in the second direction the second sub-module has a larger size than the first sub-module and the second sub-module protrudes beyond the first sub-module by an equal distance on both sides in the second direction; and in the first direction, the second sub-modules are arranged in the middle, and the first sub-modules are arranged on two sides of the second sub-modules.
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 first sub-module is unequal in number on both sides of the second sub-module.
4. The detector module of claim 1, wherein the plurality of detector sub-modules further comprises a third sub-module, the third sub-module having a larger dimension than the second sub-module in the second direction, and the third sub-module, the second sub-module, and the first sub-module being sequentially arranged from a middle to both sides in the first direction.
5. The detector module of any of claims 1 to 4, wherein the top of the detector sub-module has a top surface, the top surfaces of the plurality of detector sub-modules being tangential to the circumference of the same circle.
6. The detector module of claim 5, wherein the support has a plurality of locating surfaces thereon, the detector sub-modules being mounted on the locating surfaces, the plurality of locating surfaces being tangential to the circumference of another circle.
7. The detector module of claim 6, wherein circles tangent to the top surfaces of the plurality of detector sub-modules are concentric circles with circles tangent to the plurality of locating surfaces.
8. A CT detector comprising a detector housing and a plurality of detector modules according to any of claims 1 to 7, a plurality of said detector modules being arranged side by side in 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, the top surfaces of the plurality of detector sub-modules being on the same sphere.
10. The CT detector of claim 8, wherein the detector sub-modules are square, a plurality of detector sub-modules in a same detector module being disposed against each other with gaps between adjacent ones of at least some adjacent detector modules.
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| 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 |
| 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 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104605876A (en) * | 2014-12-12 | 2015-05-13 | 沈阳东软医疗系统有限公司 | Detector module and detector system of CT machine |
| CN209004029U (en) * | 2018-03-30 | 2019-06-21 | 上海联影医疗科技有限公司 | Detector module, CT detector and CT equipment |
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| CN101561506B (en) * | 2009-05-21 | 2012-05-23 | 清华大学 | Crystal module for gamma ray detector, manufacturing method thereof and gamma ray detector |
| US8204171B2 (en) * | 2010-10-11 | 2012-06-19 | General Electric Company | Multi-faceted tileable detector for volumetric computed tomography imaging |
| US8548119B2 (en) * | 2011-01-13 | 2013-10-01 | General Electric Company | Multi-slice CT detector with tileable packaging structure |
| US10010296B2 (en) * | 2014-12-30 | 2018-07-03 | Morpho Detection, Llc | Systems and methods for x-ray CT scanner with reconfigurable field of view |
| JP6776024B2 (en) * | 2016-06-30 | 2020-10-28 | キヤノンメディカルシステムズ株式会社 | X-ray detector, X-ray detector module, support member and X-ray CT device |
| CN108836376B (en) * | 2018-06-29 | 2020-01-03 | 东软医疗系统股份有限公司 | Detector module, detector and medical equipment |
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| CN104605876A (en) * | 2014-12-12 | 2015-05-13 | 沈阳东软医疗系统有限公司 | Detector module and detector system of CT machine |
| CN209004029U (en) * | 2018-03-30 | 2019-06-21 | 上海联影医疗科技有限公司 | Detector module, CT detector and CT equipment |
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