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US5378894A Expired / Lapsed US ⏱️ 0.0 years remaining

X-ray detector including scintillator channel separator capable of improving sensitivity of X-ray detector

Assignee: Toshiba Corp
•
Filing: 1992-12-04
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Granted: 1995-01-03
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Expires: 2012-12-04
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Abstract

Abstract A novel scintillator channel separator is constructed of a metal thin film and at least two polymer sheets for sandwiching the metal thin film. The scintillator channel separator is used in a scintillator type X-ray detector employed in a third-generation, or fourth-generation X-ray CT system. This scintillator channel separator optically separates scintillation light emitted from scintillator elements from each other within a plurality of scintillator element channels of an X-ray scintillator array. The scintillator channel separator includes at least a first thin film capable of blocking transmission of the scintillation light occurring in the adjoining scintillator element channels; and first and second polymer sheets each having first and second major surfaces, and capable of reflecting the scintillation light. The first thin film is sandwiched between the first major surfaces of the first and second polymer sheets, and the second major surfaces of the first and second polymer sheets are stuck to corresponding side surfaces of the respective adjoining scintillator elements, so that the thin film and the first and second polymer sheets constitute the scintillator channel separator.

Inventors

  • 👤 Yoshimi Akai

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-09 07:21
CPC Classifications
G; G01; G01T; G01T1/00; G01T1/16; G01T1/20; G01T1/202; G01T1/2002

Claims Analysis

Total Claims: 36
Claim 1
Independent Claim 124 words
A scintillator channel separator for optically separating scintillation light from each other within each of plural scintillator element channels of an X-ray scintillator array, consisting essentially of a first thin film capable of blocking transmission of the scintillation light occurring in the adjoining scintillator element channels; and first and second polymer sheets each having first and second major surfaces, and capable of reflecting the scintillation light, said first thin film being sandwiched between said first major surfaces of said first and second polymer sheets, and said second major surfaces of said first and second polymer sheets being stuck to corresponding side surfaces of the respective adjoining scintillator elements, whereby said thin film and said first and second polymer sheets constitute the scintillator channel separator.
Claim 2
Dependent Claim 124 words
A scintillator channel separator for optically separating scintillation light from each other within each of plural scintillator element channels of an X-ray scintillator array, consisting essentially of a first thin film capable of blocking transmission of the scintillation light occurring in the adjoining scintillator element channels; and first and second polymer sheets each having first and second major surfaces, and capable of reflecting the scintillation light, said first thin film being sandwiched between said first major surfaces of said first and second polymer sheets, and said second major surfaces of said first and second polymer sheets being stuck to corresponding side surfaces of the respective adjoining scintillator elements, whereby said thin film and said first and second polymer sheets constitute the scintillator channel separator.
Claim 3
Dependent Claim 19 words
A scintillator channel separator as claimed in claim 1, wherein said first thin film is a metal thin film.
Claim 4
Dependent Claim 31 words
A scintillator channel separator as claimed in claim 2, wherein a metal of said metal thin film is selected from gold (Au), silver (Ag), chromium (Cr), stainless steel and aluminum (Al).
Claim 5
Dependent Claim 34 words
A scintillator channel separator as claimed in claim 2, wherein said metal film is formed on one of said first and second major surfaces of said first and second polymer sheets by vapor deposition.
Claim 6
Dependent Claim 22 words
A scintillator channel separator as claimed in claim 1, wherein said first and second polymer sheets are made of color polyester sheets.
Claim 7
Dependent Claim 17 words
A scintillator channel separator as claimed in claim 5, wherein color of said polyester sheets is white.
Claim 8
Dependent Claim 68 words
A scintillator channel separator as claimed in claim 1, wherein said first thin film is made of an aluminum thin film vapor-deposited on one of said first major surfaces of said first and second polymer sheets, and said second major surfaces of said first and second polymer sheets are stuck to said corresponding side surfaces of the respective adjoining scintillator elements by way of a transparent adhesive agent.
Claim 9
Dependent Claim 168 words
A scintillator channel separator for optically separating scintillation light from each other within each of plural scintillator element channels of an X-ray scintillator array, consisting essentially of: a first thin film capable of blocking transmission of the scintillation light occurring in the adjoining scintillator element channels; first and second polymer sheets having first and second major surfaces, and capable of reflecting the scintillation light, said first thin film being sandwiched between said first major surfaces of said first and second polymer sheets, and said second major surfaces of said first and second polymer sheets being struck to corresponding side surfaces of the respective adjoining scintillator elements, whereby said thin film and said first and second polymer sheets constitute the scintillator channel separator; and a second thin film capable of blocking transmission of the scintillation light occurring in the adjoining scintillator element channels, whereby both of said first thin film and said second thin film are sandwiched between said first major surfaces of said first and second polymer sheets.
Claim 10
Dependent Claim 168 words
A scintillator channel separator for optically separating scintillation light from each other within each of plural scintillator element channels of an X-ray scintillator array, consisting essentially of: a first thin film capable of blocking transmission of the scintillation light occurring in the adjoining scintillator element channels; first and second polymer sheets having first and second major surfaces, and capable of reflecting the scintillation light, said first thin film being sandwiched between said first major surfaces of said first and second polymer sheets, and said second major surfaces of said first and second polymer sheets being struck to corresponding side surfaces of the respective adjoining scintillator elements, whereby said thin film and said first and second polymer sheets constitute the scintillator channel separator; and a second thin film capable of blocking transmission of the scintillation light occurring in the adjoining scintillator element channels, whereby both of said first thin film and said second thin film are sandwiched between said first major surfaces of said first and second polymer sheets.
Claim 11
Dependent Claim 25 words
A scintillator channel separator as claimed in claim 8, wherein both of said first thin film and said second thin film are metal thin films.
Claim 12
Dependent Claim 33 words
A scintillator channel separator as claimed in claim 9, wherein metals of said first and second metal thin films are selected from gold (Au), silver (Ag), chromium (Cr), stainless steel and aluminum (Al).
Claim 13
Dependent Claim 37 words
A scintillator channel separator as claimed in claim 10, wherein said first and second metal films are formed on one of said first and second major surfaces of said first and second polymer sheets by vapor deposition.
Claim 14
Dependent Claim 22 words
A scintillator channel separator as claimed in claim 8, wherein said first and second polymer sheets are made of color polyester sheets.
Claim 15
Dependent Claim 17 words
A scintillator channel separator as claimed in claim 12, wherein color of said polyester sheets is white.
Claim 16
Dependent Claim 88 words
A scintillator channel separator as claimed in claim 8, wherein said first and second thin films are made of aluminum thin films vapor-deposited on each of said first major surfaces of said first and second polymer sheets, and said second major surfaces of said first and second polymer sheets are stuck to said corresponding side surfaces of the respective adjoining scintillator elements by way of a transparent adhesive agent, and said first and second aluminum thin films are stuck to each other by way of an adhesive agent.
Claim 17
Dependent Claim 174 words
An X-ray detecting apparatus comprising at least: a scintillator array constructed of a plurality of scintillator elements for emitting scintillation light upon receipt of an X-ray; a photodiode array constructed of a plurality of photodiodes capable of detecting scintillation light emitted from said scintillator elements; and a scintillator channel separator for optically separating scintillation light from each other within each of plural scintillator element channels of said X-ray scintillator array, said scintillator channel separator consisting essentially of: a first thin film capable of blocking transmission of the scintillation light occurring in the adjoining scintillator element channels; and first and second polymer sheets each having first and second major surfaces, and capable of reflecting the scintillation light, said first thin film being sandwiched between said first major surfaces of said first and second polymer sheets, and said second major surfaces of said first and second polymer sheets being stuck to corresponding side surfaces of the respective adjoining scintillator elements, whereby said thin film and said first and second polymer sheets constitute the scintillator channel separator.
Claim 18
Dependent Claim 174 words
An X-ray detecting apparatus comprising at least: a scintillator array constructed of a plurality of scintillator elements for emitting scintillation light upon receipt of an X-ray; a photodiode array constructed of a plurality of photodiodes capable of detecting scintillation light emitted from said scintillator elements; and a scintillator channel separator for optically separating scintillation light from each other within each of plural scintillator element channels of said X-ray scintillator array, said scintillator channel separator consisting essentially of: a first thin film capable of blocking transmission of the scintillation light occurring in the adjoining scintillator element channels; and first and second polymer sheets each having first and second major surfaces, and capable of reflecting the scintillation light, said first thin film being sandwiched between said first major surfaces of said first and second polymer sheets, and said second major surfaces of said first and second polymer sheets being stuck to corresponding side surfaces of the respective adjoining scintillator elements, whereby said thin film and said first and second polymer sheets constitute the scintillator channel separator.
Claim 19
Dependent Claim 19 words
An X-ray detecting apparatus as claimed in claim 15, wherein said first thin film is a metal thin film.
Claim 20
Dependent Claim 32 words
An X-ray detecting apparatus as claimed in claim 16, wherein a metal of said metal thin film is selected from gold (Au), silver (Ag), chromium (Cr), a stainless steel and aluminum (Al).
Claim 21
Dependent Claim 34 words
An X-ray detecting apparatus as claimed in claim 16, wherein said metal film is formed on one of said first and second major surfaces of said first and second polymer sheets by vapor deposition.
Claim 22
Dependent Claim 22 words
An X-ray detecting apparatus as claimed in claim 15, wherein said first and second polymer sheets are made of color polyester sheets.
Claim 23
Dependent Claim 17 words
An X-ray detecting apparatus as claimed in claim 19, wherein color of said polyester sheets is white.
Claim 24
Dependent Claim 68 words
An X-ray detecting apparatus as claimed in claim 15, wherein said first thin film is made of an aluminum thin film vapor-deposited on one of said first major surfaces of said first and second polymer sheets, and said second major surfaces of said first and second polymer sheets are stuck to said corresponding side surfaces of the respective adjoining scintillator elements by way of a transparent adhesive agent.
Claim 25
Dependent Claim 219 words
An X-ray detecting apparatus comprising at least: a scintillator array constructed of a plurality of scintillator elements for emitting scintillation light upon receipt of an X-ray; a photodiode array constructed of a plurality of photodiodes capable of detecting scintillation light emitted from said scintillator elements; and a scintillator channel separator for optically separating scintillation light from each other within each of plural scintillator element channels of said X-ray scintillator array, said scintillator channel separator consisting essentially of: a first thin film capable of blocking transmission of the scintillation light occurring in the adjoining scintillator element channels; first and second polymer sheets each having first and second major surfaces, and capable of reflecting the scintillation light, said first thin film being sandwiched between said first major surfaces of said first and second polymer sheets, and said second major surfaces of said first and second polymer sheets being stuck to corresponding side surfaces of the respective adjoining scintillator elements, whereby said thin film and said first and second polymer sheets constitute the scintillator channel separator; and a second thin film capable of blocking transmission of the scintillation light occurring in the adjoining scintillator element channels, whereby both of said first thin film and said second thin film are sandwiched between said first major surfaces of said first and second polymer sheets.
Claim 26
Dependent Claim 219 words
An X-ray detecting apparatus comprising at least: a scintillator array constructed of a plurality of scintillator elements for emitting scintillation light upon receipt of an X-ray; a photodiode array constructed of a plurality of photodiodes capable of detecting scintillation light emitted from said scintillator elements; and a scintillator channel separator for optically separating scintillation light from each other within each of plural scintillator element channels of said X-ray scintillator array, said scintillator channel separator consisting essentially of: a first thin film capable of blocking transmission of the scintillation light occurring in the adjoining scintillator element channels; first and second polymer sheets each having first and second major surfaces, and capable of reflecting the scintillation light, said first thin film being sandwiched between said first major surfaces of said first and second polymer sheets, and said second major surfaces of said first and second polymer sheets being stuck to corresponding side surfaces of the respective adjoining scintillator elements, whereby said thin film and said first and second polymer sheets constitute the scintillator channel separator; and a second thin film capable of blocking transmission of the scintillation light occurring in the adjoining scintillator element channels, whereby both of said first thin film and said second thin film are sandwiched between said first major surfaces of said first and second polymer sheets.
Claim 27
Dependent Claim 25 words
An X-ray detecting apparatus as claimed in claim 22, wherein both of said first thin film and said second thin film are metal thin films.
Claim 28
Dependent Claim 33 words
An X-ray detecting apparatus as claimed in claim 23, wherein metals of said first and second metal thin films are selected from gold (Au), silver (Ag), chromium (Cr), stainless steel and aluminum (Al).
Claim 29
Dependent Claim 37 words
An X-ray detecting apparatus as claimed in claim 24, wherein said first and second metal films are formed on one of said first and second major surfaces of said first and second polymer sheets by vapor deposition.
Claim 30
Dependent Claim 22 words
An X-ray detecting apparatus as claimed in claim 22, wherein said first and second polymer sheets are made of color polyester sheets.
Claim 31
Dependent Claim 17 words
An X-ray detecting apparatus as claimed in claim 26, wherein color of said polyester sheets is white.
Claim 32
Dependent Claim 88 words
An X-ray detecting apparatus as claimed in claim 22, wherein said first and second thin films are made of aluminum thin films vapor-deposited on each of said first major surfaces of said first and second polymer sheets, and said second major surfaces of said first and second polymer sheets are stuck to said corresponding side surfaces of the respective adjoining scintillator elements by way of a transparent adhesive agent, and said first and second aluminum thin films are stuck to each other by way of an adhesive agent.
Claim 33
Dependent Claim 122 words
A scintillator channel separator for optically separating scintillation light from each other within each of plural scintillator element channels of an X-ray scintillator array, consisting of a first thin film capable of blocking transmission of the scintillation light occurring in the adjoining scintillator element channels; and first and second polymer sheets having first and second major surfaces, and capable of reflecting the scintillation light, said first thin film being sandwiched between said first major surfaces of said first and second polymer sheets, and said second major surfaces of said first and second polymer sheets being stuck to corresponding side surfaces of the respective adjoining scintillator elements, whereby said thin film and said first and second polymer sheets constitute the scintillator channel separator.
Claim 34
Dependent Claim 122 words
A scintillator channel separator for optically separating scintillation light from each other within each of plural scintillator element channels of an X-ray scintillator array, consisting of a first thin film capable of blocking transmission of the scintillation light occurring in the adjoining scintillator element channels; and first and second polymer sheets having first and second major surfaces, and capable of reflecting the scintillation light, said first thin film being sandwiched between said first major surfaces of said first and second polymer sheets, and said second major surfaces of said first and second polymer sheets being stuck to corresponding side surfaces of the respective adjoining scintillator elements, whereby said thin film and said first and second polymer sheets constitute the scintillator channel separator.
Claim 35
Dependent Claim 167 words
A scintillator channel separator for optically separating scintillation light from each other within each of plural scintillator element channels of an X-ray scintillator array, consisting of a first thin film capable of blocking transmission of the scintillation light occurring in the adjoining scintillator element channels; first and second polymer sheets having first and second major surfaces, and capable of reflecting the scintillation light, said first thin film being sandwiched between said first major surfaces of said first and second polymer sheets, and said second major surfaces of said first and second polymer sheets being stuck to corresponding side surfaces of the respective adjoining scintillator elements, whereby said thin film and said first and second polymer sheets constitute the scintillator channel separator; and a second thin film capable of blocking transmission of the scintillation light occurring in the adjoining scintillator element channels, whereby both of said first thin film and said second thin film are sandwiched between said first major surfaces of said first and second polymer sheets.
Claim 36
Dependent Claim 167 words
A scintillator channel separator for optically separating scintillation light from each other within each of plural scintillator element channels of an X-ray scintillator array, consisting of a first thin film capable of blocking transmission of the scintillation light occurring in the adjoining scintillator element channels; first and second polymer sheets having first and second major surfaces, and capable of reflecting the scintillation light, said first thin film being sandwiched between said first major surfaces of said first and second polymer sheets, and said second major surfaces of said first and second polymer sheets being stuck to corresponding side surfaces of the respective adjoining scintillator elements, whereby said thin film and said first and second polymer sheets constitute the scintillator channel separator; and a second thin film capable of blocking transmission of the scintillation light occurring in the adjoining scintillator element channels, whereby both of said first thin film and said second thin film are sandwiched between said first major surfaces of said first and second polymer sheets.

References Cited (Backward Citations)

US4731534A Cited
US4720426A Cited
US5276328A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1998-01-02 1998-07-04 1999-01-03 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 2002-01-02 2002-07-04 2003-01-03 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 2006-01-02 2006-07-04 2007-01-03 $7700.00 Window Closed / Lapsed

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