Radiographic film for mammography with improved processability
AssigneeEastman Kodak Company
InventorsRobert E. Dickerson, Anthony Adin, Richard E. Beal, Anthony D. Gingello
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Abstract
A radiographic silver halide film has improved processability because it includes a silver halide emulsion composed of cubic grains having a critical molar ratio of chloride, iodide, and bromide. In particular, the cubic grains comprise from about 1 to about 20 mol % of chloride and from about 0.25 to about 1.5 mol % of iodide, with the remainder being bromide. The cubic grains also have an ECD of from about 0.65 to about 0.8 μm. This film is particularly useful in mammography for imaging dense soft tissue.
Claims14
A radiographic silver halide film comprising a support having first and second major surfaces and that is capable of transmitting X-radiation,
- said radiographic silver halide film having disposed on said first major support surface, one or more hydrophilic colloid layers including at least one cubic silver halide grain emulsion layer, and on said second major support surface, one or more hydrophilic colloid layers including at least one silver halide emulsion layer,
- wherein said silver halide cubic grain emulsion layer comprises cubic silver halide grains comprising from about 1 to about 20 mol % chloride and from about 0.25 to about 1.5 mol % iodide, both based on total silver in the emulsion layer, which cubic grains have an average ECD of from about 0.65 to about 0.8 μm.
A radiographic silver halide film comprising a support having first and second major surfaces and that is capable of transmitting X-radiation,
- said radiographic silver halide film having disposed on said first major support surface, one or more hydrophilic colloid layers including at least one cubic silver halide grain emulsion layer, and on said second major support surface, one or more hydrophilic colloid layers including at least one silver halide emulsion layer comprising predominantly tabular silver halide grains, and an antihalation layer,
- wherein said silver halide cubic grain emulsion layer comprises predominantly cubic silver halide grains comprising from about 10 to about 20 mol % chloride and from about 0.5 to about 1.5 mol % iodide, both based on total silver in the emulsion layer, which cubic grains have an average ECD of from about 0.7 to about 0.75 μm, and
- a protective overcoat disposed over all silver halide emulsion layers on both sides of said support.
Dependencies are inferred from the claim text.