High speed radiographic imaging assembly

A radiographic imaging assembly that has a system speed of at least 1000 and comprises:

• A) a symmetric radiographic silver halide film having a film speed of at least 900 and comprising a support that has first and second major surfaces,
• said radiographic silver halide film having disposed on said first major support surface, two or more hydrophilic colloid layers including a first silver halide emulsion layer, and having on said second major support surface, two or more hydrophilic colloid layers including a second silver halide emulsion layer,
• each of said first and second silver halide emulsion layers comprising tabular silver halide grains that have the same composition, independently an aspect ratio of from about 38 to about 45, an average grain diameter of at least 3.5 μm, and an average thickness of from about 0.08 to about 0.14 μm, and comprise at least 95 mol % bromide and up to 1 mol % iodide, both based on total silver in said grains,
• said film further comprising a protective overcoat on both sides of said support disposed over all of said hydrophilic colloid layers,
• 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 5 to about 15% of deionized oxidized gelatin, based on the total dry weight of said hydrophilic polymeric vehicle mixture, and
• B) two fluorescent intensifying screens arranged on both sides of said film, the pair of screens having a screen speed of at least 600 and said screens having an average screen sharpness measurement (SSM) value that is at least 1.1 times that of reference Curve A of FIG. 4 at a given spatial frequency, and each screen comprising a terbium activated gadolinium oxysulfide phosphor capable of absorbing X-rays and emitting electromagnetic radiation having a wavelength greater than 300 nm, said phosphor being coated in admixture with a polymeric binder in a phosphor layer on a flexible polymeric support.