US7054408B2
Expired / Lapsed
US
⏱️ 0.0 years remaining
CT detector array having non pixelated scintillator array
Assignee: General Electric Co
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Filing: 2003-04-30
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Granted: 2006-05-30
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Expires: 2023-04-30
Abstract
Abstract The present invention is a directed to a non-pixelated scintillator array for a CT detector as well as an apparatus and method of manufacturing same. The scintillator array is comprised of a number of ceramic fibers or single crystal fibers that are aligned in parallel with respect to one another. As a result, the pack has very high dose efficiency. Furthermore, each fiber is designed to direct light out to a photodiode with very low scattering loss. The fiber size (cross-sectional diameter) may be controlled such that smaller fibers may be fabricated for higher resolution applications. Moreover, because the fiber size can be controlled to be consistent throughout the scintillator may and the fibers are aligned in parallel with one another, the scintillator array, as a whole, also is uniform. Therefore, precise alignment with the photodiode array or the collimator assembly is not necessary.
Inventors
- 👤 Haochuan Jiang
- 👤 David M. Hoffman
- 👤 James S. Vartuli
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:27
CPC Classifications
G; G01; G01T; G01T1/00; G01T1/29; G01T1/2914; G01T1/2985; A; A61; A61B; A61B6/00; A61B6/02; A61B6/03; A61B6/032; A61B6/42; A61B6/4208; A61B6/4233; G01N; G01N23/00; G01N23/02; G01N23/04; G01N23/046; G01T1/16; G01T1/161; G01T1/164; G01T1/1641; G01T1/1644; G01T1/20; G01T1/201; G21; G21K; G21K1/00; G21K1/02; G01N2223/00; G01N2223/40; G01N2223/419
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
140 words
A CT detector comprising an array of scintillation elements configured to illuminate upon the reception of high frequency electromagnetic energy and coupled to a single light detection element configured to detect illumination of the array of scintillation elements and output electrical signals generally indicative of high frequency electromagnetic energy received by the array of scintillation elements, the detector formed by: developing a plurality of single crystal fibers of scintillation material; casting the plurality of single crystal fibers with an adhesive material; curing the plurality of single crystal fibers and adhesive material to form a cured pack of a first dimension; cutting the cured pack to a specified dimension that is different from the first dimension; optically coupling the cured pack to the single light detection element; and wherein each of the plurality of crystal fibers has a uniform cross-sectional diameter.
Claim 2
Dependent Claim
140 words
A CT detector comprising an array of scintillation elements configured to illuminate upon the reception of high frequency electromagnetic energy and coupled to a single light detection element configured to detect illumination of the array of scintillation elements and output electrical signals generally indicative of high frequency electromagnetic energy received by the array of scintillation elements, the detector formed by: developing a plurality of single crystal fibers of scintillation material; casting the plurality of single crystal fibers with an adhesive material; curing the plurality of single crystal fibers and adhesive material to form a cured pack of a first dimension; cutting the cured pack to a specified dimension that is different from the first dimension; optically coupling the cured pack to the single light detection element; and wherein each of the plurality of crystal fibers has a uniform cross-sectional diameter.
Claim 3
Dependent Claim
45 words
The CT detector of claim 1 wherein the step of developing further includes the step of growing the plurality of single crystal fibers from a mixture of Tb 4 O 7 , Lu 2 O 3 , Al 2 O 3 and CeO 2 .
Claim 4
Dependent Claim
41 words
The CT detector of claim 2 wherein the step of growing includes the step of incorporating one of distilled water and alcohol into the mixture and allowing the mixture to dry and further formed by melting and homogenizing the dried mixture.
Claim 5
Dependent Claim
16 words
The CT detector of claim 3 further formed by pulling crystal fibers from the homogenized mixture.
Claim 6
Dependent Claim
23 words
The CT detector of claim 1 further formed by coating a layer of reflective material to one end surface of the cured pack.
Claim 7
Dependent Claim
21 words
The CT detector of claim 1 further formed by sputter coating reflective metal on one end surface of the cured pack.
Claim 8
Dependent Claim
17 words
The CT detector of claim 6 wherein the reflective material includes one of Al, Ag, and Au.
Claim 9
Dependent Claim
20 words
The CT detector of claim 1 further formed by depositing adhesive material in any voids existing between adjacent crystal fibers.
Claim 10
Dependent Claim
16 words
The CT detector of claim 8 wherein the adhesive material is doped with TiO 2 .
References Cited (Backward Citations)
US3717762A
Cited
US4096381A
Cited
US4179100A
Cited
US4365155A
Cited
US4421671A
Cited
US4473513A
Cited
US4525628A
Cited
US4743764A
Cited
US5521387A
Cited
US4783596A
Cited
US5227634A
Cited
US5583908A
Cited
US5391879A
Cited
US5594253A
Cited
US6087663A
Cited
US6078052A
Cited
US6117362A
Cited
US6458295B1
Cited
US6448559B1
Cited
US6210605B1
Cited
US6384400B1
Cited
US6298113B1
Cited
US6630077B2
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2009-05-29 | 2009-11-28 | 2010-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2013-05-29 | 2013-11-28 | 2014-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2017-05-29 | 2017-11-28 | 2018-05-30 | $7700.00 | Window Closed / Lapsed |