Portal imaging assembly with asymmetric films and asymmetric screens and method of use

A radiographic imaging assembly comprising the following components arranged in association, in order:

• (a) a first fluorescent intensifying screen,
• (b) a first radiographic silver halide film,
• (c) a second radiographic silver halide film, and
• (d) a second fluorescent intensifying screen,
• wherein said first and second fluorescent intensifying screens differing in photographic speed by at least 0.1 logE, and
• (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 the first major support surface, one or more hydrophilic colloid layers including at least one silver halide emulsion layer, and on the 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, 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 the first major support surface, one or more hydrophilic colloid layers including at least one silver halide emulsion layer, and on the 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, and all hydrophilic layers of the second radiographic silver halide film being fully forehardened and wet processing solution permeable for image formation within 45 seconds, and
• the ratio of the photographic speed of said first radiographic silver halide film to the photographic speed of said second radiographic silver halide film is greater than 0.15 logE.