US5276328A
Expired / Lapsed
US
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Radiation detector having reflective isolation plates
Assignee: Hitachi Healthcare Manufacturing Ltd
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Filing: 1992-08-11
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Granted: 1994-01-04
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Expires: 2012-08-11
Abstract
Abstract A multi-elements radiation detector provides isolation plates each having a uniform light reflectance on the surface, excellent reproducibility and uniform performance for enhancing an X-ray spatial efficiency and a light transmission efficiency and is intended to improve a detection efficiency and an S/N of a reconstructed image so that the detector may be used for a digital X-ray imaging system, in particular, an X-ray computed tomography system. In the multi-elements radiation detector, each isolation plate isolating the adjacent elements from each other includes a thin plate made of Mo. On the surfaces of the thin plate, there are provided organopolysiloxane membranes obtained by hydrolyzing and condensing organosilicate such as CH 3 Si(OCH 3 ) 3 so that those surfaces are formed to be specular-reflective. On the films, there are formed reflective multi optical thin films composed of a combination of Al, MgF 2 and TiO 3 . The isolation plate uses Mo as its material for improving its X-ray spatial efficiency. Further, the light reflectance on the surface is made as high as 85%, so that the light absorption is reduced on the surface of the isolation plate, thereby improving a light transmission efficiency and a detection efficiency. This leads to improving an S/N of an image reconstructed by an X-ray computed tomograpy system.
Inventors
- 👤 Minoru Yoshida
- 👤 Manabu Nakagawa
- 👤 Koichi Koike
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 22:10
CPC Classifications
G; G01; G01T; G01T1/00; G01T1/16; G01T1/20; G01T1/2002
Claims Analysis
Total Claims: 35
Claim 1
Independent Claim
87 words
In a multi-elements solid-state radiation detector having a plurality of arranged detecting elements each having a scintillator for converting X-rays into light and a photodiode for converting light into an electric signal and a plurality of metallic isolation plates located between adjacent detecting elements for isolating said elements from each other, said radiation detector comprising: a membrane comprising organopolysiloxane as a main component formed on both surfaces of each of said isolating plates and a reflective multi-optical film formed on said membrane for enhancing a light reflectance.
Claim 2
Dependent Claim
87 words
In a multi-elements solid-state radiation detector having a plurality of arranged detecting elements each having a scintillator for converting X-rays into light and a photodiode for converting light into an electric signal and a plurality of metallic isolation plates located between adjacent detecting elements for isolating said elements from each other, said radiation detector comprising: a membrane comprising organopolysiloxane as a main component formed on both surfaces of each of said isolating plates and a reflective multi-optical film formed on said membrane for enhancing a light reflectance.
Claim 3
Dependent Claim
72 words
A radiation detector as claimed in claim 1, wherein said membrane comprises organopolysiloxane having a siloxane bond formed by hydrolyzing and condensing organosilicate represented by a general formula of RnSi(OR')m, wherein n is any one of 0, 1, 2 and 3, m is 4-n, R is any one of H, Cl, Br, CH 3 and C 2 H 5 , and R' is alkyl group having from 1 to 10 carbon atoms.
Claim 4
Dependent Claim
38 words
A radiation detector as claimed in claim 1, wherein said membrane comprises organopolysiloxane having a siloxane bond formed by hydrolyzing and condensing CH 3 SI(OCH 3 ) 3 or CH 3 Si(OC 2 H 5 ) 3 .
Claim 5
Dependent Claim
34 words
A radiation detector as claimed in claim 1, wherein said membrane comprises organopolysiloxane having a siloxane bond formed by hydrolyzing and condensing Si(OCH 3 ) 4 or Si(OC 2 H 5 ) 4 .
Claim 6
Dependent Claim
23 words
A radiation detector as claimed in claim 1, wherein said film has a surface roughness of Ra=0.03 μm or less and is specular-reflective.
Claim 7
Dependent Claim
22 words
A radiation detector as claimed in claim 1, wherein the thickness of each of said isolation plates is 100 μm or less.
Claim 8
Dependent Claim
29 words
A radiation detector as claimed in claim 1, wherein any one of Ta, W, Mo, Au, Pb, Fe and Cu comprises a material of each of said isolation plates.
Claim 9
Dependent Claim
37 words
A radiation detector as claimed in claim 1, wherein an alloy formed of any one of Ta, W, Mo, Au, Pb, Fe and Cu as a main component comprises a material of each of said isolation plates.
Claim 10
Dependent Claim
30 words
A radiation detector as claimed in claim 1, wherein said reflective multi optical film comprises a multi-layer film consisting of SiO 2 and any one of Al, Au and Ag.
Claim 11
Dependent Claim
33 words
A radiation detector as claimed in claim 1, wherein said reflective multi optical film composes a multi-layer film consisting of MgF 2 , TiO 2 and any one of Al, Au and Ag.
Claim 12
Dependent Claim
121 words
In a multi-elements solid-state radiation detector having a plurality of arranged detecting elements each having a scintillator for converting X-rays into light and a photodiode for converting light into an electric signal and a plurality of metallic isolation plates located between adjacent detecting elements for isolating said elements from each other, said radiation detector comprising: an organopolysiloxane membrane formed on both surfaces of each of said isolation plates, said membrane having a siloxane bond formed by hydrolyzing and condensing CH 3 Si(OCH 3 ) 3 or CH 3 Si(OC 2 H 5 ) 3 , having a surface roughness of Ra=0.03 μm or less and being specular-reflective; and a reflective multi-optical film formed on said membrane for enhancing a light reflectance.
Claim 13
Dependent Claim
121 words
In a multi-elements solid-state radiation detector having a plurality of arranged detecting elements each having a scintillator for converting X-rays into light and a photodiode for converting light into an electric signal and a plurality of metallic isolation plates located between adjacent detecting elements for isolating said elements from each other, said radiation detector comprising: an organopolysiloxane membrane formed on both surfaces of each of said isolation plates, said membrane having a siloxane bond formed by hydrolyzing and condensing CH 3 Si(OCH 3 ) 3 or CH 3 Si(OC 2 H 5 ) 3 , having a surface roughness of Ra=0.03 μm or less and being specular-reflective; and a reflective multi-optical film formed on said membrane for enhancing a light reflectance.
Claim 14
Dependent Claim
22 words
A radiation detector as claimed in claim 11, wherein the thickness of each of said isolation plates is 100 μm or less.
Claim 15
Dependent Claim
29 words
A radiation detector as claimed in claim 11, wherein any one of Ta, W, Mo, Au, Pb, Fe and Cu comprises a material of each of said isolation plates.
Claim 16
Dependent Claim
37 words
A radiation detector as claimed in claim 11, wherein an alloy formed of any one of Ta, W, Mo, Au, Pb, Fe and Cu as a main component comprises a material of each of said isolation plates.
Claim 17
Dependent Claim
30 words
A radiation detector as claimed in claim 11, wherein said reflective multi optical film comprises a multi-layer film consisting of SiO 2 and any one of Al, Au and Ag.
Claim 18
Dependent Claim
33 words
A radiation detector as claimed in claim 11, wherein said reflective multi optical film comprises a multi-layer film consisting of MgF 2 , TiO 2 and any one of Al, Au and Ag.
Claim 19
Dependent Claim
117 words
In a multi-elements solid-state radiation detector having a plurality of arranged detecting elements each having a scintillator for converting X-rays into light and a photodiode for converting light into an electric signal and a plurality of metallic isolation plates located between adjacent detecting elements for isolating said elements from each other, said radiation detector comprising: an organopolysiloxane membrane formed on both surfaces of each of said isolation plates, said membrane having a siloxane bond formed by hydrolyzing and condensing Si(OCH 3 ) 4 or Si(OC 2 H 5 ) 4 , having a surface roughness of Ra=0.03 μm or less and being specular-reflective; and a reflective multi-optical film formed on said membrane for enhancing a light reflectance.
Claim 20
Dependent Claim
117 words
In a multi-elements solid-state radiation detector having a plurality of arranged detecting elements each having a scintillator for converting X-rays into light and a photodiode for converting light into an electric signal and a plurality of metallic isolation plates located between adjacent detecting elements for isolating said elements from each other, said radiation detector comprising: an organopolysiloxane membrane formed on both surfaces of each of said isolation plates, said membrane having a siloxane bond formed by hydrolyzing and condensing Si(OCH 3 ) 4 or Si(OC 2 H 5 ) 4 , having a surface roughness of Ra=0.03 μm or less and being specular-reflective; and a reflective multi-optical film formed on said membrane for enhancing a light reflectance.
Claim 21
Dependent Claim
22 words
A radiation detector as claimed in claim 17, wherein the thickness of each of said isolation plates is 100 μm or less.
Claim 22
Dependent Claim
29 words
A radiation detector as claimed in claim 17, wherein any one of Ta, W, Mo, Au, Pb, Fe and Cu comprises a material of each of said isolation plates.
Claim 23
Dependent Claim
37 words
A radiation detector as claimed in claim 17, wherein an alloy formed of any one of Ta, W, Mo, Au, Pb, Fe and Cu as a main component comprises a material of each of said isolation plates.
Claim 24
Dependent Claim
29 words
A radiation detector as claimed in claim 17, wherein said reflective multi-optical film comprises a multi-layer film consisting of SiO 2 and any one of Al, Au and Ag.
Claim 25
Dependent Claim
33 words
A radiation detector as claimed in claim 17, wherein said reflective multi optical film comprises a multi-layer film consisting of MgF 2 , TiO 2 and any one of Al, Au and Ag.
Claim 26
Dependent Claim
138 words
In a multi-elements solid-state radiation detector having a plurality of arranged detecting elements each having a scintillator for converting X-rays into light and a photodiode for converting light into an electric signal and a plurality of metallic isolation plates located between adjacent detecting elements for isolating said elements from each other, said radiation detector comprising: an organopolysiloxane membrane formed on both surfaces of each of said isolation plates, said membrane having a siloxane bond formed by hydrolyzing and condensing CH 3 Si(OCH 3 ) 3 or CH 3 Si(OC 2 H 5 ) 3 , having a surface roughness of Ra=0.03 μm or less and being specular-reflective; and a reflective multi-optical film formed on said membrane for enhancing a light reflectance, said film comprising a multi-layer film of a combination of Al, MgF 2 and TiO 2 .
Claim 27
Dependent Claim
138 words
In a multi-elements solid-state radiation detector having a plurality of arranged detecting elements each having a scintillator for converting X-rays into light and a photodiode for converting light into an electric signal and a plurality of metallic isolation plates located between adjacent detecting elements for isolating said elements from each other, said radiation detector comprising: an organopolysiloxane membrane formed on both surfaces of each of said isolation plates, said membrane having a siloxane bond formed by hydrolyzing and condensing CH 3 Si(OCH 3 ) 3 or CH 3 Si(OC 2 H 5 ) 3 , having a surface roughness of Ra=0.03 μm or less and being specular-reflective; and a reflective multi-optical film formed on said membrane for enhancing a light reflectance, said film comprising a multi-layer film of a combination of Al, MgF 2 and TiO 2 .
Claim 28
Dependent Claim
22 words
A radiation detector as claimed in claim 23, wherein the thickness of each of said isolation plates is 100 μm or less.
Claim 29
Dependent Claim
29 words
A radiation detector as claimed in claim 23, wherein any one of Ta, W, Mo, Au, Pb, Fe and Cu comprises a material of each of said isolation plates.
Claim 30
Dependent Claim
37 words
A radiation detector as claimed in claim 23, wherein an alloy formed of any one of Ta, W, Mo, Au, Pb, Fe and Cu as a main component comprises a material of each of said isolation plates.
Claim 31
Dependent Claim
134 words
In a multi-elements solid-state radiation detector having a plurality of arranged detecting elements each having a scintillator for converting X-rays into light and a photodiode for converting light into an electric signal and a plurality of metallic isolation plates located between adjacent detecting elements for isolating said elements from each other, said radiation detector comprising: an organopolysiloxane membrane formed on both surfaces of each of said isolation plates, said membrane having a siloxane bond formed by hydrolyzing and condensing Si(OCH 3 ) 4 or Si(OC 2 H 5 ) 4 , having a surface roughness of Ra=0.03 μm or less and being specular-reflective; and a reflective multi-optical film formed on said membrane for enhancing a light reflectance, said film comprising a multi-layer film of a combination of Al, MgF 2 and TiO 2 .
Claim 32
Dependent Claim
134 words
In a multi-elements solid-state radiation detector having a plurality of arranged detecting elements each having a scintillator for converting X-rays into light and a photodiode for converting light into an electric signal and a plurality of metallic isolation plates located between adjacent detecting elements for isolating said elements from each other, said radiation detector comprising: an organopolysiloxane membrane formed on both surfaces of each of said isolation plates, said membrane having a siloxane bond formed by hydrolyzing and condensing Si(OCH 3 ) 4 or Si(OC 2 H 5 ) 4 , having a surface roughness of Ra=0.03 μm or less and being specular-reflective; and a reflective multi-optical film formed on said membrane for enhancing a light reflectance, said film comprising a multi-layer film of a combination of Al, MgF 2 and TiO 2 .
Claim 33
Dependent Claim
22 words
A radiation detector as claimed in claim 27, wherein the thickness of each of said isolation plates is 100 μm or less.
Claim 34
Dependent Claim
29 words
A radiation detector as claimed in claim 27, wherein any one of Ta, W, Mo, Au, Pb, Fe and Cu comprises a material of each of said isolation plates.
Claim 35
Dependent Claim
37 words
A radiation detector as claimed in claim 27, wherein an alloy formed of any one of Ta, W, Mo, Au, Pb, Fe and Cu as a main component comprises a material of each of said isolation plates.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1997-01-03 | 1997-07-05 | 1998-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-01-03 | 2001-07-05 | 2002-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-01-03 | 2005-07-05 | 2006-01-04 | $7700.00 | Window Closed / Lapsed |