US4246483A
Expired / Lapsed
US
⏱️ 0.0 years remaining
X-ray apparatus for tomosynthesis
Assignee: US Philips Corp
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Filing: 1979-01-15
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Granted: 1981-01-20
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Expires: 1999-01-15
Abstract
Abstract Apparatus for examining objects includes a group of X-ray sources, which are activated group-wise by a generator. A group of sub-images are separately projected onto a photographic film. During a subsequent step, the film is re-imaged with the aid of an optical lens matrix the lenses in the matrix are arranged in a manner similar to the X-ray sources.
Inventors
- 👤 Hermann Weiss
- 👤 Rolf Linde
- 👤 Ulf Tiemens
- 👤 Erhard Klotz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 07:50
CPC Classifications
A; A61; A61B; A61B6/00; A61B6/02; A61B6/025; G; G03; G03B; G03B42/00; G03B42/02; G03B42/026; G21; G21K; G21K1/00; G21K1/02; H; H01; H01J; H01J35/00; H01J35/02; H01J35/16
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
73 words
Apparatus for examining objects comprising: a multiplicity of X-ray sources, each having a comparatively small X-ray focus; a first housing for a flat X-ray registration medium; and a second housing surrounding the X-ray sources, the X-ray sources being fixed within the second housing in a geometrical arrangement which permits mutually separable sub-images to be formed on the registration medium, the X-ray foci of all of the sources being situated in a single plane.
Claim 2
Dependent Claim
73 words
Apparatus for examining objects comprising: a multiplicity of X-ray sources, each having a comparatively small X-ray focus; a first housing for a flat X-ray registration medium; and a second housing surrounding the X-ray sources, the X-ray sources being fixed within the second housing in a geometrical arrangement which permits mutually separable sub-images to be formed on the registration medium, the X-ray foci of all of the sources being situated in a single plane.
Claim 3
Dependent Claim
20 words
Apparatus as claimed in claim 1 in which the X-ray sources comprise fixed anode X-ray tubes which include filament-heated cathodes.
Claim 4
Dependent Claim
27 words
Apparatus as claimed in claim 2 further comprising transformer means, contained within the second housing, which function to produce high frequency pulses for activating the X-ray tubes.
Claim 5
Dependent Claim
51 words
Apparatus as claimed in any of the preceding claims wherein the second housing includes exit windows for transmitting X-ray beams generated by the X-ray sources and further comprising sockets which function to fix the positions of the sources within the second housing and which are rigidly coupled to the X-ray windows.
References Cited (Backward Citations)
FR1541671A
Cited
US4132896A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-01-20 | 1984-07-21 | 1985-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-01-20 | 1988-07-21 | 1989-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-01-20 | 1992-07-21 | 1993-01-20 | $7700.00 | Window Closed / Lapsed |