Radiation imagery chemistry: process – composition – or product th – Post imaging processing – Using plural sequential baths of same type
Patent
1980-07-21
1981-10-06
Louie, Jr., Won H.
Radiation imagery chemistry: process, composition, or product th
Post imaging processing
Using plural sequential baths of same type
430432, 430966, 430967, 430367, 430356, 430370, 430463, G03C 700, G03C 192
Patent
active
042936403
ABSTRACT:
A process for reducing patient and personnel hazards from exposure to X-radiation during diagnostic procedures, comprising irradiating a photographic emulsion to produce an underexposed radiograph, developing and fixing the radiograph and treating the underexposed processed radiograph in a one-step copper ion image enhancement composition to intensify the image profile to a level at least equivalent to a fully exposed radiograph and subsequently darkening the enhanced image by treatment in a one-step iron ion darkening composition to blacken the image profile. The copper ion image enhancement composition and subsequent iron ion darkening composition produces a darkened or blackened image profile as is found in conventional radiographs and enables a reduction in radiation exposure to patient and personnel up to 50% and more over what is generally regarded as the usual level of radiation for a given diagnostic radiographic examination.
REFERENCES:
patent: 2699994 (1955-01-01), Umberger
patent: 3083097 (1963-03-01), Lassig et al.
patent: 3753714 (1973-08-01), Sugiyama et al.
British Journal of Photography, Jun. 1916, vol. 63, pp. 357-358.
Amateur Photographer & Photography, Jun. 1923, pp. 567-568.
Photo Technique, Oct. 1940, pp. 42-46.
British Journal of Photography, Aug. 1955, pp. 376-377.
Neblette: Photography 1952, pp. 351-363.
Louie, Jr. Won H.
Minrad Corporation
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