Patent ID: 6485882
Filing Date: 2002-11-26
Classification: G03C,Y10S

Abstract:
A radiographic imaging assembly comprising a high contrast first radiographic silver halide film arranged in association with a lower contrast second radiographic silver halide film,(a) said first radiographic silver halide film comprising a support having first and second major surfaces and is capable of transmitting X-radiation, said first radiographic silver halide film having disposed on said first major support surface, one or more hydrophilic colloid layers including at least one silver halide emulsion layer, and on said second major support surface, one or more hydrophilic colloid layers including at least one silver halide emulsion layer, each of said silver halide emulsion layers comprising silver halide cubic grains that have the same or different composition in each silver halide emulsion layer, and all hydrophilic layers of said first radiographic silver halide film being fully forehardened and wet processing solution permeable for image formation within 45 seconds, (b) said second radiographic silver halide film comprising a support having first and second major surfaces and is capable of transmitting X-radiation, said second radiographic silver halide film having disposed on said first major support surface, one or more hydrophilic colloid layers including at least one silver halide emulsion layer, and on said second major support surface, one or more hydrophilic colloid layers including at least one silver halide emulsion layer, each of said silver halide emulsion layers comprising silver halide cubic grains that have the same or different composition in each silver halide emulsion layer, and all hydrophilic layers of said second radiographic silver halide film being fully forehardened and wet processing solution permeable for image formation within 45 seconds, and wherein the ratio of the contrast of said first radiographic silver halide film to the contrast of said second radiographic silver halide film is at least 1.25.