US4164657A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for tomography
Assignee: Optische Industrie de Oude Delft NV
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Filing: 1977-05-09
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Granted: 1979-08-14
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Expires: 1997-05-09
Abstract
Abstract An apparatus for tomography, comprising an X-ray or gamma-ray source, at least one detector, and an image reconstruction apparatus. The detector is a spatially two-dimensional, continuous detector large enough to form a complete picture of the projection of the object section thereon, taking into consideration the place of the object section and of the source of radiation relative to the detector. The detector is connected by optical or fibre-optical means to a luminance intensifier tube. This tube may be coupled, either optically or fibre-optically, to a television pick-up tube whose output is coupled to the image reconstruction apparatus. In one form of the invention the detector is an X-ray screen, which is preferably concave towards the source of radiation.
Inventors
- 👤 Simon Duinker
- 👤 Hendrik Mulder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:13
CPC Classifications
A; A61; A61B; A61B6/00; A61B6/42; A61B6/4208; A61B6/4225; H; H05; H05G; H05G1/00; H05G1/08; H05G1/64
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
106 words
An apparatus for tomography, comprising an X-ray or gamma-ray source, one detector body, and an image reconstruction apparatus, wherein said detector body is a two-dimensional, continuous X-ray screen having dimensions selected in relation to the disposition of the object section to be examined and of the source of radiation relative to the detector body so that the projection of the object section, as far as its greatest cross-sectional dimension is concerned, is at least completely depicted on the detector body, and the dimension of the X-ray screen at right angles to said projection is sufficient to accommodate at least two such projections of adjacent object sections.
Claim 2
Independent Claim
106 words
An apparatus for tomography, comprising an X-ray or gamma-ray source, one detector body, and an image reconstruction apparatus, wherein said detector body is a two-dimensional, continuous X-ray screen having dimensions selected in relation to the disposition of the object section to be examined and of the source of radiation relative to the detector body so that the projection of the object section, as far as its greatest cross-sectional dimension is concerned, is at least completely depicted on the detector body, and the dimension of the X-ray screen at right angles to said projection is sufficient to accommodate at least two such projections of adjacent object sections.
Claim 3
Dependent Claim
14 words
An apparatus according to claim 1, wherein said detector is concave towards the source.
Claim 4
Dependent Claim
11 words
An apparatus according to claim 1, wherein said detector is exchangeable.
Claim 5
Independent Claim
142 words
An apparatus for tomography, comprising an X-ray or gamma-ray source, one detector body, a luminance intensifier tube having an envelope, optical means for depicting the side of the detector body away from the source of radiation on the cathode of the luminance intensifier tube, and an image reconstruction apparatus, said detector body being arranged outside said envelope and being a two-dimensional, continuous X-ray screen having dimensions selected in relation to the disposition of the object section to be examined and of the source of radiation relative to the detector body so that the projection of the object section, as far as its greatest cross-sectional dimension is concerned, is at least completely depicted on the detector body, and the dimension of the X-ray screen at right angles to said projection is sufficient to accommodate at least two such projections of adjacent object sections.
Claim 6
Independent Claim
142 words
An apparatus for tomography, comprising an X-ray or gamma-ray source, one detector body, a luminance intensifier tube having an envelope, optical means for depicting the side of the detector body away from the source of radiation on the cathode of the luminance intensifier tube, and an image reconstruction apparatus, said detector body being arranged outside said envelope and being a two-dimensional, continuous X-ray screen having dimensions selected in relation to the disposition of the object section to be examined and of the source of radiation relative to the detector body so that the projection of the object section, as far as its greatest cross-sectional dimension is concerned, is at least completely depicted on the detector body, and the dimension of the X-ray screen at right angles to said projection is sufficient to accommodate at least two such projections of adjacent object sections.
Claim 7
Dependent Claim
46 words
An apparatus according to claim 4 wherein the detector body includes two X-ray screens one behind the other for absorption of soft radiation in the one screen and for absorption of hard radiation in the other screen; and means for separating light from the two screens.
Claim 8
Dependent Claim
37 words
An apparatus according to claim 4, further comprising a television pick-up tube having an input coupled by optical means to the anode end of the luminance intensifier tube, and an output coupled to the image reconstruction apparatus.
Claim 9
Dependent Claim
13 words
An apparatus according to claim 6, wherein said optical means are fibre-optical means.
Claim 10
Dependent Claim
13 words
An apparatus according to claim 6, wherein said optical means are lens means.
Claim 11
Dependent Claim
21 words
An apparatus according to claim 6, further comprising a television monitor coupled to an output terminal of said television pick-up tube.
Claim 12
Dependent Claim
40 words
An apparatus according to claim 6, wherein the image reconstruction apparatus includes a plurality of image reconstruction apparatuses coupled to the output of the television pick-up tube for simultaneously producing images of different sections of the object to be examined.
Claim 13
Dependent Claim
40 words
An apparatus according to claim 10, further comprising a logarithmic amplifier interconnected between the output of the television pick-up tube and the plurality of image reconstruction apparatuses for simultaneously producing images of different sections of the object to be examined.
Claim 14
Independent Claim
150 words
An apparatus for tomography, comprising an X-ray or gamma-ray source, one detector body, a luminance intensifier tube having an input window, said input window being a fibre-optics arrangement for transmitting the radiation image from said detector body to the cathode surface of said luminance intensifier tube, and an image reconstruction apparatus, said detector body being arranged on the exterior surface of said input window and being a two-dimensional, continuous X-ray screen having dimensions selected in relation to the disposition of the object section to be examined and of the source of radiation relative to the detector body so that the projection of the object section, as far as its greatest cross-sectional dimension is concerned, is at least completely depicted on the detector body, and that the dimension of the X-ray screen at right angles to said projection is sufficient to accommodate at least two such projections of adjacent object sections.
Claim 15
Independent Claim
150 words
An apparatus for tomography, comprising an X-ray or gamma-ray source, one detector body, a luminance intensifier tube having an input window, said input window being a fibre-optics arrangement for transmitting the radiation image from said detector body to the cathode surface of said luminance intensifier tube, and an image reconstruction apparatus, said detector body being arranged on the exterior surface of said input window and being a two-dimensional, continuous X-ray screen having dimensions selected in relation to the disposition of the object section to be examined and of the source of radiation relative to the detector body so that the projection of the object section, as far as its greatest cross-sectional dimension is concerned, is at least completely depicted on the detector body, and that the dimension of the X-ray screen at right angles to said projection is sufficient to accommodate at least two such projections of adjacent object sections.
Claim 16
Dependent Claim
46 words
An apparatus according to claim 12 wherein the detector body includes two X-ray screens one behind the other for absorption of soft radiation in the one screen and for absorption of hard radiation in the other screen, and means for separating light from the two screens.
Claim 17
Dependent Claim
37 words
An apparatus according to claim 12, further comprising a television pick-up tube having an input coupled by optical means to the anode end of the luminance intensifier tube, and an output coupled to the image reconstruction apparatus.
Claim 18
Dependent Claim
13 words
An apparatus according to claim 14, wherein said optical means are fibre-optical means.
Claim 19
Dependent Claim
13 words
An apparatus according to claim 14, wherein said optical means are lens means.
Claim 20
Dependent Claim
21 words
An apparatus according to claim 14, further comprising a television monitor coupled to an output terminal of said television pick-up tube.
Claim 21
Dependent Claim
40 words
An apparatus according to claim 14, wherein the image reconstruction apparatus includes a plurality of image reconstruction apparatuses coupled to the output of the television pick-up tube for simultaneously producing images of different sections of the object to be examined.
Claim 22
Dependent Claim
40 words
An apparatus according to claim 18, further comprising a logarithmic amplifier interconnected between the output of the television pick-up tube and the plurality of image reconstruction apparatuses for simultaneously producing images of different sections of the object to be examined.
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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) | 1982-08-13 | 1983-02-12 | 1983-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-08-13 | 1987-02-12 | 1987-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-08-13 | 1991-02-12 | 1991-08-14 | $7700.00 | Window Closed / Lapsed |