Silver halide photographic light sensitive element for medical radiography
AssigneeMinnesota Mining and Manufacturing Company
InventorsSean D. Slater, Andrew W. Mott
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Abstract
A medical radiographic element comprising a base bearing on each of its two major surfaces a layer of photographic silver halide emulsion sensitive to green light, said element having between the base and at least one silver halide layer a hydrophilic colloid layer containing a dye having a nucleus of the general formula: ##STR1## wherein: each R independently represents an alkyl group, each Y independently represents an electron attracting group and each X represents a water solubilising group.
Claims10
A medical radiographic element comprising a base having two major surfaces, said element bearing on each of its two major surfaces a layer of photographic silver halide emulsion sensitive to green light so that a first major surface has thereon a first silver halide emulsion layer sensitive to green light and a second major surface has thereon a second silver halide emulsion layer sensitive to green light, said element having between the base and at least one of said first and second silver halide emulsion layer a hydrophilic colloid layer containing a dye having a nucleus of the general formula:
- ##STR5## wherein:
- each R independently represents an alkyl group,
- each Y independently represents an electron attracting group and
- each X represents a water solubilizing group.
A method of preparing a medical radiographic element in which a layer of photographic silver halide emulsion sensitive to green light is coated on each side of a base and on at least one side of said base a hydrophilic colloid layer is coated between said base and silver halide emulsion containing a dye having a nucleus of the general formula:
- ##STR7## in which:
- each R independently represents an alkyl group,
- each Y independently represents an electron attracting group and
- each X represents a water solubilising group, is coated on the base between the base and at least one silver halide layer.
Dependencies are inferred from the claim text.