US3790785A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radiographic imaging
Assignee: UNITED STATES TRUST Co
•
Filing: 1971-11-18
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Granted: 1974-02-05
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Expires: 1991-11-18
Abstract
Abstract An X-ray imaging system includes a thin sodium iodide single crystal or matrix of single crystals for converting an X-ray image into a visible image. Preferably an electro-optical amplifier amplifies the detected image and delivers the amplified image to a closed circuit television viewing system.
Inventors
- 👤 F Paolini
- 👤 A Kuhnel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:18
CPC Classifications
A; A61; A61B; A61B6/00; A61B6/50; A61B6/51; A61B6/512; A61B6/42; A61B6/4208; A61B6/4258; G; G01; G01N; G01N23/00; G01N23/02; G01N23/04; G01N23/043
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
15 words
Radiographic apparatus in accordance with claim 1 wherein said thickness is less than a centimeter.
Claim 2
Dependent Claim
17 words
Radiographic apparatus in accordance with claim 1 wherein said thickness is of the order of a millimeter.
Claim 3
Dependent Claim
36 words
Radiographic apparatus in accordance with claim 1 and further comprising, a closed circuit television system for amplifying and displaying the visible image on said crystal upon the face of a display tube for real time observation.
Claim 4
Dependent Claim
29 words
Radiographic apparatus in accordance with claim 1 and further comprising, an image intensifier for amplifying the visible image upon said crystal, and film means for recording the intensified image.
Claim 5
Dependent Claim
18 words
Radiographic apparatus in accordance with claim 1 wherein said source of radiographic energy comprises a low dosage isotope.
Claim 6
Dependent Claim
23 words
Radiographic apparatus in accordance with claim 6 wherein said low dosage isotope comprises an isotope from group consisting of radioactive Iodine-125 and Cobalt-57.
Claim 7
Dependent Claim
49 words
Radiographic apparatus in accordance with claim 6 and further comprising, an assembly supporting said source and said crystal to define a region therebetween for accommodating a tooth to be X-rayed, said assembly including optical means for focusing the visible image on said crystal upon a predetermined visible image plane.
Claim 8
Dependent Claim
18 words
Radiographic apparatus in accordance with claim 8 and further comprising image intensifying means located at said image plane.
Claim 9
Dependent Claim
53 words
Radiographic apparatus in accordance with claim 9 wherein said optical means comprises a generally J-shaped light pipe with said crystal at the end of the short leg of the J and the image intensifying means at the end of the long leg of the J with said source supported from said long leg.
References Cited (Backward Citations)
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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) | 1977-02-04 | 1977-08-06 | 1978-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-04 | 1981-08-06 | 1982-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-04 | 1985-08-06 | 1986-02-05 | $7700.00 | Window Closed / Lapsed |