Photographic silver halide material for mammography
AssigneeAgfa-Gevaert
InventorsRudy Goedeweeck, Guy Vastenaeken, Luc Heremans, Kathy Elst
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AssigneeAgfa-Gevaert
InventorsRudy Goedeweeck, Guy Vastenaeken, Luc Heremans, Kathy Elst
Estimating the term…
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.
A photographic material for mammography comprising a transparent support and at least one light-sensitive emulsion layer containing silver halide grains, said emulsion layer(s) being located on only one side of said support and said material being characterised by a sensitometric curve of optical density as a function of relative logarithmic exposure (hereinafter referred to as logE), having
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