Patent US5322438A successfully refreshed from Google Patents.
US3576994A
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Neutron radiography of deuterated tissue
Assignee: United States Atomic Energy Commission
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Filing: 1969-07-14
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Granted: 1971-05-04
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Expires: 1989-07-14
Abstract
Abstract An improved method of preparing a neutron radiograph of biological media by first contacting the media with a fluid containing deuterium such as deuterium oxide. The protium in the nonfatty tissue is replaced with deuterium to substantially reduce the neutron capture and scatter within the deuterated tissue. Consequently, the radiolucency of the nonfatty tissue is greatly increased. Deuterium does not significantly replace the protium in the fatty tissue which therefore remains radiopaque in contrast to the radiolucent nonfatty tissue.
Inventors
- 👤 Paul B Parks
- 👤 Mark Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:45
CPC Classifications
G; G01; G01N; G01N23/00; G01N23/02; G01N23/06; G01N23/09
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
12 words
The method according to claim 1 wherein said fluid includes deuterium oxide.
Claim 2
Dependent Claim
36 words
The method according to claim 1 wherein said fluid is introduced into catheterized arteries to perfuse throughout said biological media and a portion of said fluid is discharged from said media to remove displaced protium therefrom.
Claim 3
Dependent Claim
24 words
The method according to claim 1 wherein greater than 70 percent by weight of the protium in said biological media is replaced with deuterium.
Claim 4
Dependent Claim
24 words
The method of claim 1 wherein said neutron radiograph is taken with a thermal neutron flux density of more than 5 X 105 neutrons/(cm.2)(sec).
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-05-03 | 1974-11-02 | 1975-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-03 | 1978-11-02 | 1979-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-03 | 1982-11-02 | 1983-05-04 | $7700.00 | Window Closed / Lapsed |