US5285489A
Expired / Lapsed
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K-edge filter and an x-ray apparatus employing such a filter
Assignee: Panasonic Holdings Corp
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Filing: 1992-02-18
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Granted: 1994-02-08
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Expires: 2012-02-18
Abstract
Abstract A K-edge filter whose main portion functions as a filter member is made of a material containing at least two kinds of elements, and an X-ray apparatus is fabricated so as to include such a K-edge filter.
Inventors
- 👤 Tetsuro Ohtsuchi
- 👤 Hiroshi Tsutsui
- 👤 Koichi Ohmori
- 👤 Sueki Baba
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:04
CPC Classifications
H; H05; H05G; H05G1/00; H05G1/08; H05G1/26; G; G21; G21K; G21K1/00; G21K1/10
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
76 words
A K-edge filter through which X-rays are passed so as to be subjected to energy separation into two energy regions, said K-edge filter including a main portion functioning as a filter member; said main portion having an effective thickness of at least 100 μm; said K-edge filter being made of a material containing at least two kinds of elements whose K-absorption edges are different from each other in a range of from 5 to 10 keV.
Claim 2
Dependent Claim
76 words
A K-edge filter through which X-rays are passed so as to be subjected to energy separation into two energy regions, said K-edge filter including a main portion functioning as a filter member; said main portion having an effective thickness of at least 100 μm; said K-edge filter being made of a material containing at least two kinds of elements whose K-absorption edges are different from each other in a range of from 5 to 10 keV.
Claim 3
Dependent Claim
22 words
A K-edge filter as claimed in claim 1, wherein atomic numbers of the elements are in a range from 50 to 85.
Claim 4
Dependent Claim
39 words
A K-edge filter as claimed in claim 1, wherein said main portion is formed of at least two thin plates or at least two thin films, which are stacked on each other and are made of the elements, respectively.
Claim 5
Dependent Claim
42 words
A K-edge filter as claimed in claim 1, wherein said main portion is made of at least two powder materials of the elements; said powder materials being mixed with each other so as to be fixed in position in said main portion.
Claim 6
Dependent Claim
88 words
An X-ray apparatus comprising: an X-ray generator; a CdTe X-ray detector; and a K-edge filter through which X-rays are passed so as to be subjected to energy separation into two energy regions; said K-edge filter including a main portion functioning as a filter member; said main portion having an effective thickness of at least 100 μm; said K-edge filter being made of a material containing at least two kinds of elements whose K-absorption edges are different from each other in a range of from 5 to 10 keV.
Claim 7
Dependent Claim
88 words
An X-ray apparatus comprising: an X-ray generator; a CdTe X-ray detector; and a K-edge filter through which X-rays are passed so as to be subjected to energy separation into two energy regions; said K-edge filter including a main portion functioning as a filter member; said main portion having an effective thickness of at least 100 μm; said K-edge filter being made of a material containing at least two kinds of elements whose K-absorption edges are different from each other in a range of from 5 to 10 keV.
Claim 8
Dependent Claim
90 words
An X-ray apparatus comprising: an X-ray generator; a multichannel type CdTe X-ray detector; and a K-edge filter through which X-rays are passed so as to be subjected to energy separation into two energy regions; said K-edge filter including a main portion functioning as a filter member; said main portion having an effective thickness of at least 100 μm; said K=edge filter being made of a material containing at least two kinds of elements whose K-absorption edges are different from each other in a range of from 5 to 10 keV.
Claim 9
Dependent Claim
90 words
An X-ray apparatus comprising: an X-ray generator; a multichannel type CdTe X-ray detector; and a K-edge filter through which X-rays are passed so as to be subjected to energy separation into two energy regions; said K-edge filter including a main portion functioning as a filter member; said main portion having an effective thickness of at least 100 μm; said K=edge filter being made of a material containing at least two kinds of elements whose K-absorption edges are different from each other in a range of from 5 to 10 keV.
Claim 10
Dependent Claim
87 words
An X-ray apparatus comprising: an X-ray generator; an X-ray detector; and a K-edge filter through which X-rays are passed so as to be subjected to energy separation into two energy regions; said K-edge filter including a main portion functioning as a filter member; said main portion having an effective thickness of at least 100 μm; said K-edge filter being made of a material containing at least two kinds of elements whose K-absorption edges are different from each other in a range of from 5 to 10 keV.
Claim 11
Dependent Claim
87 words
An X-ray apparatus comprising: an X-ray generator; an X-ray detector; and a K-edge filter through which X-rays are passed so as to be subjected to energy separation into two energy regions; said K-edge filter including a main portion functioning as a filter member; said main portion having an effective thickness of at least 100 μm; said K-edge filter being made of a material containing at least two kinds of elements whose K-absorption edges are different from each other in a range of from 5 to 10 keV.
Claim 12
Dependent Claim
17 words
An X-ray apparatus as claimed in claim 7, wherein said X-ray detector is a CdS X-ray detector.
Claim 13
Dependent Claim
30 words
An X-ray apparatus as claimed in claim 7, wherein said X-ray detector is one of an NaI scintillation detector, a GdWO 3 scintillation detector and an HgI 2 X-ray detector.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-02-07 | 1997-08-09 | 1998-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-02-07 | 2001-08-09 | 2002-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-02-07 | 2005-08-09 | 2006-02-08 | $7700.00 | Window Closed / Lapsed |