Photographic silver halide material for mammography

Details Photographic silver halide material for mammography Photographic silver halide material for mammography

1998-03-30

1999-10-12

Huff, Mark F.

Radiation imagery chemistry: process, composition, or product th

Luminescent imaging

430567, 430966, G03C 517, G03C 516, G03C 1035

Patent

active

059653183

ABSTRACT:
A photographic silver halide material and a method using said material for mammography are disclosed. The photographic material has a large dynamic range and a high contrast, so that lesions deep in the glandular tissue are accurately detected, and also clearly depicts thin tissue such as the skin line of the breast. The sensitometric curve of optical density versus logarithmic exposure logE of said photographic material is characterised by (i) an average gradation of at least 3.5 between Dmin+1.0 and Dmin+2.5; and (ii) a local gradient ranging from 0.7 to 1.8 and an optical density not higher than 3.5 at the point where logE equals SP+0.8 (SP being defined as the logE at which the optical density equals Dmin+1.0); and (iii) an optical density of at least 3.7 at the point where logE equals SP+1.3.

REFERENCES:
patent: 5290655 (1994-03-01), Iwasaki
patent: 5449599 (1995-09-01), Heremans
patent: 5460916 (1995-10-01), Iwasaki
patent: 5759754 (1998-06-01), Dickerson
patent: 5853967 (1998-12-01), Dickerson
patent: 5856077 (1999-01-01), Dickerson et al.

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