US4057725A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for measuring local radiation absorption in a body
Assignee: US Philips Corp
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Filing: 1975-09-05
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Granted: 1977-11-08
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Expires: 1995-09-05
Abstract
Abstract A device for measuring the spatial distribution of radiation absorption in a body wherein a multiplicity of radiators are regularly distributed about a circle surrounding the body, each radiator emitting a wedge-shaped beam of radiation in the plane of the circle toward a different arc portion of the circle between two other radiators, a multiplicity of adjoining detectors in each arc portion measuring radiation from the radiator emitting radiation to that arc portion, the spatial distribution of radiation absorption being calculated from the measured radiation values of all the detectors.
Inventors
- 👤 Wolfgang Wagner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:57
CPC Classifications
A; A61; A61B; A61B6/00; A61B6/02; A61B6/03; A61B6/032; A61B6/08; A61B6/40; A61B6/4007; A61B6/4014; A61B6/42; A61B6/4275
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
105 words
A device for measuring the spatial distribution of radiation absorption in a body, comprising: a multiplicity of radiators regularly distributed about a circle of diameter sufficient to surround said body, each radiator emitting a wedge-shaped beam of radiation in the plane of said circle toward a different arc portion of said circle between two other radiators; and a multiplicity of adjoining detectors in each of said different arc portions of said circle to measure radiation from the associated radiator emitting radiation thereto, each detector having only a comparatively small effective measuring field, the spatial distribution being calculated from the measured radiation values from said detectors.
Claim 2
Independent Claim
105 words
A device for measuring the spatial distribution of radiation absorption in a body, comprising: a multiplicity of radiators regularly distributed about a circle of diameter sufficient to surround said body, each radiator emitting a wedge-shaped beam of radiation in the plane of said circle toward a different arc portion of said circle between two other radiators; and a multiplicity of adjoining detectors in each of said different arc portions of said circle to measure radiation from the associated radiator emitting radiation thereto, each detector having only a comparatively small effective measuring field, the spatial distribution being calculated from the measured radiation values from said detectors.
Claim 3
Dependent Claim
33 words
The device defined in claim 1 wherein said circle of radiators and detectors is rotatable in the plane thereof with respect to said body to measure radiation values in different rotary orientations thereof.
Claim 4
Dependent Claim
16 words
The device defined in claim 2 wherein said radiators and detectors may be successively rendered effective.
References Cited (Backward Citations)
US3866047A
Cited
US3881110A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-11-07 | 1981-05-09 | 1981-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-11-07 | 1985-05-09 | 1985-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-11-07 | 1989-05-09 | 1989-11-08 | $7700.00 | Window Closed / Lapsed |