US4286168A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phantom simulation device for scintillation cameras
Assignee: Atomic Products Corp
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Filing: 1979-01-18
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Granted: 1981-08-25
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Expires: 1999-01-18
Abstract
Abstract A phantom simulation imaging quality control device that effectively simulates one centimeter lesions, using steel ball bearings as gamma ray attenuators. The bearings are mounted in a synthetic resinous sheet in an orthogonal pattern. The phantom can provide uniformity, resolution, linearity, distortion and field size checks, all with a single exposure.
Inventors
- 👤 James R. Carr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:38
CPC Classifications
G; G21; G21K; G21K1/00; G21K1/10
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
62 words
A phantom simulation device for gamma ray imaging cameras comprising: a generally planar base element which is substantially transparent to gamma ray penetration, and a plurality of metallic spheres supported by said base element in predetermined pattern; said base element including a pair of juxtaposed synthetic resinous sheets, said spheres being mounted within bores in the plane of one of said sheets.
Claim 2
Dependent Claim
62 words
A phantom simulation device for gamma ray imaging cameras comprising: a generally planar base element which is substantially transparent to gamma ray penetration, and a plurality of metallic spheres supported by said base element in predetermined pattern; said base element including a pair of juxtaposed synthetic resinous sheets, said spheres being mounted within bores in the plane of one of said sheets.
Claim 3
Dependent Claim
26 words
A phantom simulation device in accordance with claim 1, in which said spheres are in the form of steel ball bearings of diameter approximating one centimeter.
Claim 4
Dependent Claim
25 words
A phantom simulation device in accordance with claim 1, in which said spheres are arranged in an orthogonal pattern at intervals of approximately 3 centimeters.
References Cited (Backward Citations)
US3348319A
Cited
US4055771A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-08-24 | 1985-02-23 | 1985-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-08-24 | 1989-02-23 | 1989-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-08-24 | 1993-02-23 | 1993-08-25 | $7700.00 | Window Closed / Lapsed |