US4132896A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of forming layered images of objects from superposition images of different image planes
Assignee: US Philips Corp
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Filing: 1977-04-08
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Granted: 1979-01-02
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Expires: 1997-04-08
Abstract
Abstract A method for forming a layered image of a three-dimensional object which is irradiated from different directions by a plurality of radiation sources. n coded superposition images, in different image planes, of a single movement phase are sequentially recorded on a mechanically moved detector face. Decoding of the n superposition images is realized by means of a coordinate matrix whose coordinates correspond to the geometry of the radiation source distribution, so that these images are successively electronically superposed and summed, for a number of times which equals the number of radiation sources. The same layer of the object is decoded n times and the n decoded layers are summed to form a layered image.
Inventors
- 👤 Erhard Klotz
- 👤 Ulf Tiemens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:59
CPC Classifications
A; A61; A61B; A61B6/00; A61B6/02; A61B6/025; G; G03; G03B; G03B42/00; G03B42/02; G03B42/026
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
112 words
A method of forming a layered image of a three-dimensional object which is irradiated from different directions by a plurality of radiation sources, comprising the steps of sequentially recording n coded superposition images of a single movement phase on a mechanically moved detector face in different image planes and decoding the n superposition images by successive electronic superposition and summation by means of a coordinate matrix whose coordinates correspond to the geometry of the radiation source distribution, for a number of times which equals the number of radiation sources, whereby the same layer of the object is decoded n times and the n decoded layers are summed to form a layered image.
Claim 2
Independent Claim
112 words
A method of forming a layered image of a three-dimensional object which is irradiated from different directions by a plurality of radiation sources, comprising the steps of sequentially recording n coded superposition images of a single movement phase on a mechanically moved detector face in different image planes and decoding the n superposition images by successive electronic superposition and summation by means of a coordinate matrix whose coordinates correspond to the geometry of the radiation source distribution, for a number of times which equals the number of radiation sources, whereby the same layer of the object is decoded n times and the n decoded layers are summed to form a layered image.
Claim 3
Dependent Claim
33 words
A method as claimed in claim 1, wherein the radiation sources are X-ray tubes, operating in a pulsed mode, which produce superposition images in different image planes on a continuously moving detector face.
Claim 4
Dependent Claim
28 words
A method as claimed in claim 1, wherein the detector face is rapidly moved to and fro, and during each movement phase n coded superposition images are formed.
Claim 5
Dependent Claim
21 words
A method as claimed in claim 1 wherein the detector face comprises the entrance screen of an X-ray image intensifier tube.
Claim 6
Dependent Claim
16 words
A method as claimed in claim 1 wherein the detector face comprises a flat luminous screen.
Claim 7
Dependent Claim
23 words
A method as claimed in claim 1 wherein the superposition images appearing on the detector face are recorded and stored by electronic means.
Claim 8
Dependent Claim
44 words
An apparatus for carrying into effect the method of claim 1 comprising a detector having an image plane which is movable with respect to an object position and a plurality of X-ray sources disposed in a fixed geometry with respect to said object position.
References Cited (Backward Citations)
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FR2306463A1
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-01-01 | 1982-07-03 | 1983-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-01-01 | 1986-07-03 | 1987-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-01-01 | 1990-07-03 | 1991-01-02 | $7700.00 | Window Closed / Lapsed |