US4126789A
Expired / Lapsed
US
⏱️ 0.0 years remaining
X-ray phantom
Assignee: Individual
•
Filing: 1977-06-06
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Granted: 1978-11-21
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Expires: 1997-06-06
Abstract
Abstract An X-ray phantom having a radiolucent sealed case contains sea water, a floatation chamber sealed against the sea water and having an exterior opening, and various X-ray calibration targets for illustration of a variety of densities and shapes for radiographic study.
Inventors
- 👤 Thomas M. Vogl
- 👤 Evelyn L. Roberts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:42
CPC Classifications
A; A61; A61B; A61B6/00; A61B6/58; A61B6/582; A61B6/583; G; G21; G21K; G21K1/00; G21K1/10; H; H05; H05G; H05G1/00; H05G1/08; H05G1/26
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
51 words
An improved x-ray phantom comprising (a) a closed casing of radiolucent material, (b) a sea water-like liquid filling said casing and serving as an x-ray scattering medium that simulates the x-ray response of human body fluids, (c) an x-ray target object mechanically suspended within said casing and liquid for radiographic evaluation.
Claim 2
Dependent Claim
51 words
An improved x-ray phantom comprising (a) a closed casing of radiolucent material, (b) a sea water-like liquid filling said casing and serving as an x-ray scattering medium that simulates the x-ray response of human body fluids, (c) an x-ray target object mechanically suspended within said casing and liquid for radiographic evaluation.
Claim 3
Dependent Claim
13 words
The phantom of claim 1, wherein said sea water-like liquid is sea water.
Claim 4
Dependent Claim
43 words
The phantom of claim 1, wherein said target object is a container holding an x-ray contrast media and air, the interface between the air and contrast media allowing the adjustment of x-ray kilovolts to show air and fluid levels within the human body.
Claim 5
Dependent Claim
12 words
The phantom of claim 3, wherein the contrast media is barium sulfate.
Claim 6
Dependent Claim
17 words
The phantom of claim 3, further comprising polypoid simulations attached to the inner surface of said container.
Claim 7
Dependent Claim
19 words
The phantom of claim 1, wherein said target object comprises a container holding x-ray contrast media and gallstone simulations.
Claim 8
Dependent Claim
14 words
The phantom of claim 1, wherein said target object comprises a resolution test pattern.
Claim 9
Dependent Claim
18 words
The phantom of claim 1, wherein said target object comprises a wire mesh test pattern for evaluating sharpness.
Claim 10
Dependent Claim
12 words
The phantom of claim 1, wherein said target object comprises a pentrometer.
Claim 11
Dependent Claim
44 words
The phantom of claim 1, further comprising a floatation chamber extending from the surface of said casing into the liquid within the casing and sealed against the fluid within the casing, but having an outer opening for receiving target objects of choice for x-ray.
References Cited (Backward Citations)
US3348319A
Cited
US3715587A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-11-20 | 1982-05-22 | 1982-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-11-20 | 1986-05-22 | 1986-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-11-20 | 1990-05-22 | 1990-11-21 | $7700.00 | Window Closed / Lapsed |