X-ray or gamma ray systems or devices – Photographic detector support – Sheet film cassette
Patent
1988-05-23
1989-09-05
Church, Craig E.
X-ray or gamma ray systems or devices
Photographic detector support
Sheet film cassette
378167, G03B 4204
Patent
active
048645966
ABSTRACT:
A method and system are disclosed for producing a photographic image of an X-ray pattern, including the following steps: converting the X-ray pattern to a first pattern of light; exposing a photographic film to said first pattern of light; detecting the light at elemental regions of the first pattern; generating a second pattern of light in a pattern which depends on the detected light; and exposing the photographic film to the second pattern of light. The disclosed invention provides improvement on the standard radiographic method in the following ways: (1) The recorded film contrast in low X-ray exposure regions that ordinarily would have been recorded in under-exposed regions of the film's characteristic curve will be increased significantly. (2) The overall range of light transmission that must be viewed by the radiologist will be decreased without sacrificing diagnostic information.
REFERENCES:
patent: 2120908 (1938-06-01), Raney
patent: 2640160 (1950-11-01), Collins et al.
patent: 4179100 (1977-08-01), Sashin et al.
patent: 4350889 (1982-09-01), Lisnyansky
Church Craig E.
Innovative Imaging Sciences, Inc.
Novack Martin M.
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