Blue spectrally sensitized film for radiography, imaging assembly and method

A blue-sensitive, radiographic silver halide film comprising a support having first and second major surfaces,

• said radiographic silver halide film having disposed on said first major support surface, one or more hydrophilic colloid layers including a first silver halide emulsion layer, and on the second major support surface, one or more hydrophilic colloid layers including a second silver halide emulsion layer,
• said first and second silver halide emulsion layers having essentially the same composition and comprising predominantly tabular silver halide grains that have an aspect ratio of from about 20 to about 30, a grain thickness of from about 0.10 to about 0.14 μm, and comprising at least 95 mol % bromide and from about 1 to about 3.5 mol % iodide, based on total silver halide in said emulsion layers, substantially all of said iodide being present in an internal localized portion of said tabular silver halide grains that from about 1.7 to about 85 volume % of said grains wherein 100% volume represents the surface of said grains,
• wherein said tabular silver halide grains in said first and second silver halide emulsion layers are dispersed in a hydrophilic polymeric vehicle mixture comprising from about 0.8% to about 1.2% of deionized oxidized gelatin, based on the total dry weight of said polymeric vehicle mixture, and
• wherein said tabular silver halide grains in said first and second silver halide emulsion layers are spectrally sensitized with a combination of first and second spectral sensitizing dyes that have maximum J-aggregate absorptions on said tabular silver halide grains of from about 410 to about 490 nm, wherein the maximum J-aggregate absorption of said first spectral sensitizing dye is from about 30 to about 45 nm lower in wavelength than the maximum J-aggregate absorption of said second spectral sensitizing dye, the molar ratio of said first spectral sensitizing dye to said second spectral sensitizing dye being from about 0.4:1 to about 0.7:1, and said first and second spectral sensitizing dyes being present to provide from about 70 to about 80% of saturation coverage of said tabular silver halide grains in both silver halide emulsion layers,
• said first spectral sensitizing dye being one of the following dyes I-1 through I-7 and said second spectral sensitizing dye being one of the following dyes II-1 through II-10: