Dual coating radiographic elements containing tabular grain emulsions with improved photographic vehicles

A radiographic element comprised of

• a transparent film support having first and second major surfaces and
• a first emulsion layer unit coated on the first major surface of the support,
• a second emulsion layer unit coated on the second major surface of the support,
• each of said first and second emulsion layer units including at least one radiation-sensitive emulsion comprised of
• silver halide grains containing greater than 50 mole percent bromide and less than 4 mole percent iodide, based on silver, with greater than 50 percent of total grain projected area being accounted for by tabular grains having {111} major faces,
• a spectral sensitizing dye adsorbed to the surfaces of the silver halide grains, and
• hydrophilic colloid vehicle acting as a peptizer and a binder for the silver halide grains,
• wherein at least a portion of the vehicle acting as a peptizer is a hydrophilic colloid derived from a water dispersible cationic starch.