US5216252A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Binary screen, system and method for single pulse dual energy radiography
Assignee: Thomas Jefferson University
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Filing: 1991-07-24
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Granted: 1993-06-01
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Expires: 2011-07-24
Abstract
Abstract A binary screen, system and method for performing dual energy radiographic imaging, using single pulse x-rays, are depicted. The binary screen includes a first phosphor which emits light of a first wavelength and a second phosphor which emits light of a second wavelength. The first and second phosphors are heterogeneously dispersed in the binary screen. The first phosphor is preferably Gd 2 O 2 S:Eu +3 and the second phosphor is preferably Y 2 O 2 S:Gd +3 . The second phosphor can also be Y 2 O 3 :Gd, Y 2 O 2 S:Pr or Y 2 O 2 S:Neodymium.
Inventors
- 👤 John M. Boone
- 👤 Melvin Tecotzky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 09:08
CPC Classifications
G; G21; G21K; G21K4/00; C; C09; C09K; C09K11/00; C09K11/08; C09K11/77; C09K11/7766; C09K11/7767; C09K11/7769; C09K11/7771; C09K11/7783; C09K11/7784; C09K11/7787; C09K11/7789; G21K2004/06
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
83 words
A binary screen or use in dual energy radiography, comprising; a first rare earth phosphor, wherein said first x-ray phosphor emits light of a first wavelength, said first phosphor comprising Gd 2 O 2 S:Eu; and a second rare earth phosphor, wherein said second phosphor emits light of a second wavelength, said second phosphor consisting of Y 2 O 3 :Ge, Y 2 O 2 S:Pr or Y 2 O 2 S:Neodymium whereby spectral separation between said first and second phosphors is achieved.
Claim 2
Dependent Claim
83 words
A binary screen or use in dual energy radiography, comprising; a first rare earth phosphor, wherein said first x-ray phosphor emits light of a first wavelength, said first phosphor comprising Gd 2 O 2 S:Eu; and a second rare earth phosphor, wherein said second phosphor emits light of a second wavelength, said second phosphor consisting of Y 2 O 3 :Ge, Y 2 O 2 S:Pr or Y 2 O 2 S:Neodymium whereby spectral separation between said first and second phosphors is achieved.
Claim 3
Dependent Claim
21 words
The screen of claim 1, further comprising a binder, wherein said first and second phosphors are heterogeneously dispersed in said binder.
Claim 4
Dependent Claim
23 words
The screen of claim 2, further comprising a support, wherein said binder containing said first and second phosphors is applied to said support.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-05-31 | 1996-11-30 | 1997-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-05-31 | 2000-11-30 | 2001-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-05-31 | 2004-11-30 | 2005-06-01 | $7700.00 | Window Closed / Lapsed |