US4466113A
Expired / Lapsed
US
⏱️ 0.0 years remaining
X-Ray examination device having a high local resolution
Assignee: US Philips Corp
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Filing: 1982-02-02
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Granted: 1984-08-14
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Expires: 2002-02-02
Abstract
Abstract In an X-ray examination device which comprises an X-ray source for irradiating a body and a detector device, a displaceable diaphragm device defines an angle of aperture which is substantially smaller, due to the selection of the dimension of the apertures, than the measuring angle defined by the associated radiation detector and the X-ray source. By displacement of the aperture with respect to the object to be measured during the measurement over a distance which covers the measuring angle, a high-resolution shadow image can be formed. The entire object is then contiguously irradiated.
Inventors
- 👤 Helmut Strecker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:29
CPC Classifications
G; G21; G21K; G21K1/00; G21K1/02; G21K1/025; A; A61; A61B; A61B6/00; A61B6/06; A61B6/42; A61B6/4291
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
172 words
An X-ray examination device comprising an object to be examined, radiation source means for irradiating said object, detector means having a plurality of radiation detectors for detecting radiation from said source means passing through said object, diaphragm means having a plurality of apertures corresponding to said plurality of radiation detectors for transmitting a scanning radiation beam from said object to said radiation detectors, said apertures being equally sized to pass said radiation beam with an angle of aperture a smaller than the angle of aperture b defined by said radiation source means and one radiation detector, displacement means for providing a displacement transverse to said radiation beam between said object and said diaphragm means over a distance covering at least said angle of aperture b, scatter radiation grid means between said diaphragm means and said detector means for shielding said radiation detectors from scattered radiation, and control means connected between said displacement means and said detector means for controlling movement of said displacement means and for providing a display of said object.
Claim 2
Dependent Claim
172 words
An X-ray examination device comprising an object to be examined, radiation source means for irradiating said object, detector means having a plurality of radiation detectors for detecting radiation from said source means passing through said object, diaphragm means having a plurality of apertures corresponding to said plurality of radiation detectors for transmitting a scanning radiation beam from said object to said radiation detectors, said apertures being equally sized to pass said radiation beam with an angle of aperture a smaller than the angle of aperture b defined by said radiation source means and one radiation detector, displacement means for providing a displacement transverse to said radiation beam between said object and said diaphragm means over a distance covering at least said angle of aperture b, scatter radiation grid means between said diaphragm means and said detector means for shielding said radiation detectors from scattered radiation, and control means connected between said displacement means and said detector means for controlling movement of said displacement means and for providing a display of said object.
Claim 3
Dependent Claim
33 words
An X-ray device according to claim 1, wherein said detector means includes a two dimensional field of said radiation detectors, and wherein said displacement means provides translatory movement in two mutually transverse directions.
Claim 4
Dependent Claim
31 words
An X-ray device according to claim 2, wherein said diaphragm means is a plate-like structure arranged between said detector means and said object and in the direct vicinity of said object.
Claim 5
Dependent Claim
41 words
An X-ray device according to claim 3, wherein said radiation source means, said diaphragm means, and said detector means are positioned to be stationary with respect to one another, and wherein said displacement means provides relative displacement therebetween and said object.
Claim 6
Dependent Claim
14 words
An X-ray device according to claim 3, wherein only said diaphragm means is displaceable.
Claim 7
Dependent Claim
40 words
An X-ray device according to claim 3, wherein a reference radiation detector is arranged between said radiation source means and said object, said radiation detector also being connected to said control means to correct fluctuations in time of radiation intensity.
Claim 8
Dependent Claim
41 words
An X-ray device according to claim 2, wherein said radiation source means, said diaphragm means, and said detector means are positioned to be stationary with respect to one another, and wherein said displacement means provides relative displacement therebetween and said object.
Claim 9
Dependent Claim
14 words
An X-ray device according to claim 2, wherein only said diaphragm means is displaceable.
Claim 10
Dependent Claim
40 words
An X-ray device according to claim 2, wherein a reference radiation detector is arranged between said radiation source means and said object, said radiation detector also being connected to said control means to correct fluctuations in time of radiation intensity.
Claim 11
Dependent Claim
19 words
An X-ray device according to claim 2, wherein said apertures have one of a square or a circular shape.
Claim 12
Dependent Claim
31 words
An X-ray device according to claim 1, wherein said diaphragm means is a plate-like structure arranged between said detector means and said object and in the direct vicinity of said object.
Claim 13
Dependent Claim
41 words
An X-ray device according to claim 1, wherein said radiation source means, said diaphragm means, and said detector means are positioned to be stationary with respect to one another, and wherein said displacement means provides relative displacement therebetween and said object.
Claim 14
Dependent Claim
14 words
An X-ray device according to claim 1, wherein only said diaphragm means is displaceable.
Claim 15
Dependent Claim
40 words
An X-ray device according to claim 1, wherein a reference radiation detector is arranged between said radiation source means and said object, said radiation detector also being connected to said control means to correct fluctuations in time of radiation intensity.
Claim 16
Dependent Claim
19 words
An X-ray device according to claim 1, wherein said apertures have one of a square or a circular shape.
Claim 17
Dependent Claim
67 words
An X-ray device according to claim 1, wherein said control means includes a control module circuit for activating said displacement means for a preselected displacement, arithmetic means for calculating coordinates of zones of said object to be scanned after displacement, correction circuit for correcting measurement data, memory circuit for storing said corrected measurement data and said coordinates, and display means for displaying an image of said object.
Claim 18
Dependent Claim
21 words
An X-ray device according to claim 16, wherein said control means further includes a reference memory means for storing reference values.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-08-14 | 1988-02-13 | 1988-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-08-14 | 1992-02-13 | 1992-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-08-14 | 1996-02-13 | 1996-08-14 | $7700.00 | Window Closed / Lapsed |