High-contrast silver halide photographic material and photograph

Details High-contrast silver halide photographic material and photograph High-contrast silver halide photographic material and photograph

1997-06-02

1998-12-29

Huff, Mark F.

Radiation imagery chemistry: process, composition, or product th

Luminescent imaging

430509, 430583, 430966, 25230145, G03C 516, G03C 146, C09K 1184

Patent

active

058539450

ABSTRACT:
A silver halide photographic material for mammography comprising a support having on one side thereof at least two light-sensitive emulsion layers different in sensitivity, in which the uppermost emulsion layer is less sensitive than the lower emulsion layer, the total silver content of all light-sensitive emulsion layers is from 2.0 to 5.5 g/m.sup.2, and the silver halide light-sensitive material exhibits an average contrast of from 3.6 to 4.8 and a sensitivity of from 0.03 to 0.07 lux.sec. when developed as specified; and an X-ray photographic image forming system for mammography comprising (A) a single-sided silver halide light-sensitive material and (B) an X-ray intensifying screen having a layer substantially comprising a Gd.sub.2 O.sub.2 S:Tb fluorescence substance, in which the screen has an emission luminance of 150 to 250 and a contrast transfer function of from 0.40 to 1.00 at a spatial frequency of 5 line pairs/mm, the silver halide light-sensitive material has an average contrast of 3.6 to 4.8, and the X-ray photographic image forming system has a system sensitivity of 5.5 to 10 mR.

REFERENCES:
patent: 4710637 (1987-12-01), Luckey et al.
patent: 5217647 (1993-06-01), Tono et al.
patent: 5290655 (1994-03-01), Iwasaki
patent: 5639591 (1997-06-01), Adachi
patent: 5759754 (1998-06-01), Dickerson

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