[특허]Collimated radiation detector assembly, array of collimated radiation detectors and collimated radiation detector module

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	G01T-001/24
출원번호	US-0215128 (2002-08-08)
발명자 / 주소	McGregor, Douglas S.
출원인 / 주소	The Regents of the University of Michigan
대리인 / 주소	Brooks Kushman P.C.
인용정보	피인용 횟수 : 19 인용 특허 : 25

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Collimated radiation detector assemblies, arrays of collimated radiation detectors and a collimated radiation electrode module are provided which offer the advantages of high gamma ray energy resolution and good gamma ray collimation for imaging capability. A conductive metal structure acts as an el

Collimated radiation detector assemblies, arrays of collimated radiation detectors and a collimated radiation electrode module are provided which offer the advantages of high gamma ray energy resolution and good gamma ray collimation for imaging capability. A conductive metal structure acts as an electromagnetic shield to produce the Frisch grid effect in a solid-state detector crystal or substrate of a detector. The structure may be a single structure or two parts connected together. The structure improves the gamma ray energy resolution response while at the same time serving as a gamma ray directional collimator. The assemblies, arrays and module can be manufactured from a variety of materials, including common semiconductors such as silicon, germanium, and cadmium-zinc-telluride. Assemblies can be stacked to produce a gamma ray imaging array. Also, various structures having several compartments for detectors or detector portions are provided.

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1. A collimated radiation detector assembly comprising:a high resolution radiation detector including an ionization substrate having first, second and third surfaces, the second surface opposing the first surface and the third surface being located between the first and second surfaces, the detector

1. A collimated radiation detector assembly comprising:a high resolution radiation detector including an ionization substrate having first, second and third surfaces, the second surface opposing the first surface and the third surface being located between the first and second surfaces, the detector further including a first electrode disposed at the first surface and a second electrode disposed at the second surface; anda structure including a housing having a compartment for housing the detector and a conductive collimator aligned with the housing for collimating radiation to the detector, the housing dividing the substrate into interaction, measurement and pervious regions. 2. The assembly as claimed in claim 1 wherein the housing acts as a grid. 3. The assembly as claimed in claim 1 wherein the housing acts as a Frisch grid. 4. The assembly as claimed in claim 1 wherein the measurement region of the substrate extends out of the housing and the pervious and interaction regions extend into the housing. 5. The assembly as claimed in claim 1 wherein the length of the compartment is greater than the length of the pervious and interaction regions. 6. The assembly as claimed in claim 1 wherein the radiation detector is a semiconductor radiation detector. 7. The assembly as claimed in claim 1 wherein the radiation detector is a semiconductor, single-charge carrier radiation detector. 8. The assembly as claimed in claim 1 wherein the radiation detector is a planar semiconductor detector. 9. The assembly as claimed in claim 1 wherein the radiation detector is a room temperature, gamma ray or x-ray detector. 10. The assembly as claimed in claim 1 further comprising insulating material disposed between the housing and the third surface in the compartment to insulate the housing from the third surface. 11. The assembly as claimed in claim 1 further comprising a member disposed in the compartment of the housing for coupling the second electrode to the housing. 12. The assembly as claimed in claim 11 wherein the member is conductive to electrically couple the second electrode to the housing. 13. The assembly as claimed in claim 1 wherein the detector is a pixelated detector having a plurality of separate detector portions and a plurality of electrodes disposed thereon and wherein the housing has a plurality of separate compartments for housing the detector portions. 14. The assembly as claimed in claim 1 wherein the substrate is tapered between the first and second surfaces to provide geometric weighting to the detector. 15. The assembly as claimed in claim 1 wherein the first electrode is substantially smaller than the second electrode to improve detected radiation energy resolution. 16. The assembly as claimed in claim 1 further comprising a shield attached to the collimator to shield the detector from electromagnetic noise. 17. The assembly as claimed in claim 1 wherein the housing and the collimator form a single structure. 18. The assembly as claimed in claim 1 wherein the housing and the collimator are separate parts which are connected together. 19. An array of collimated radiation detectors wherein each of the detectors is a detector assembly as claimed in claim 1. 20. The array as claimed in claim 19 wherein the array is an imaging array. 21. The array as claimed in claim 20 wherein the imaging array is a gamma ray or x-ray imaging array. 22. The array as claimed in claim 20 wherein the imaging array is a semiconductor-based imaging array. 23. An array of collimated radiation detectors comprising:a plurality of high resolution radiation detectors wherein each of the detectors includes an ionization substrate having first, second and third surfaces, the second surface opposing the first surface and the third surface being located between the first and second surfaces, each of the detectors further including a first electrode disposed at its first surface and a second electrode disposed at its second surface; anda structure inclu ding a housing having a plurality of separate compartments for housing the detectors and a conductive collimator aligned with the housing for collimating radiation to the detectors, the housing dividing each of the substrates into interaction, measurement and pervious regions. 24. The array as claimed in claim 23 wherein the structure is a single structure of high-density material. 25. The array as claimed in claim 23 wherein the structure includes an array of sheets of high-density material for separating adjacent detectors. 26. The array as claimed in claim 25 wherein the sheets are corrugated. 27. The array as claimed in claim 23 wherein the array is an imaging array. 28. The array as claimed in claim 27 wherein the imaging array is a gamma ray or x-ray imaging array. 29. The array as claimed in claim 27 wherein the imaging array is a semiconductor-based imaging array. 30. The array as claimed in claim 23 wherein each of the substrates is tapered between its first and second surfaces to provide geometric weighting to the detectors. 31. The array as claimed in claim 23 wherein the first electrode of each of the detectors is substantially smaller than the second electrode to improve detected radiation energy resolution. 32. The array as claimed in claim 23 further comprising a shield attached to the collimator to shield the detectors from electromagnetic noise. 33. The array as claimed in claim 23 wherein the structure includes at least one slotted structure of high-density material. 34. The array as claimed in claim 23 wherein the housing and the collimator form a single structure. 35. The array as claimed in claim 23 wherein the housing and the collimator are separate parts which are connected together. 36. A collimated radiation detector module comprising:an array of collimated radiation detectors including:a plurality of high resolution radiation detectors wherein each of the detectors includes an ionization substrate having first, second and third surfaces, the second surface opposing the first surface and the third surface being located between the first and second surfaces, each of the detectors further including a first electrode disposed at its first surface and a second electrode disposed at its second surface; anda structure including a housing having a plurality of separate compartments for housing the detectors and a collimator aligned with the housing for collimating radiation to the detectors, the housing dividing each of the substrates into interaction, measurement and pervious regions;circuitry for collecting signals from the detectors; anda lid connected to the structure for covering the circuitry. 37. The module as claimed in claim 36 wherein each of the substrates is tapered between its first and second surfaces to provide geometric weighting to the detectors. 38. The module as claimed in claim 36 wherein the first electrode of each of the detectors is substantially smaller than the second electrode to improve detected radiation energy resolution. 39. The module as claimed in claim 36 further comprising a shield attached to the collimator to shield the detectors from electromagnetic noise. 40. The module as claimed in claim 36 wherein the array is an imaging array. 41. The module as claimed in claim 40 wherein the imaging array is a gamma ray or x-ray imaging array. 42. The module as claimed in claim 40 wherein the imaging array is a semiconductor-based imaging array. 43. The module as claimed in claim 36 further comprising soft conductive material for establishing electrical connections with the first and second electrodes of the detectors. 44. The module as claimed in claim 36 wherein the housing and the collimator form a single structure. 45. The module as claimed in claim 36 wherein the housing and the collimator are separate parts which are connected together.

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[미국특허] Collimated radiation detector assembly, array of collimated radiation detectors and collimated radiation detector module 원문보기

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