Radiation imagery chemistry: process – composition – or product th – Radiation sensitive product – Two or more radiation-sensitive layers containing other than...
Patent
1993-11-17
1994-12-06
Neville, Thomas R.
Radiation imagery chemistry: process, composition, or product th
Radiation sensitive product
Two or more radiation-sensitive layers containing other than...
430567, 430967, G03C 146
Patent
active
053709772
ABSTRACT:
Dental X-ray films for the direct absorption of x-radiation are disclosed in which silver halide emulsion layers are coated on the opposite faces a transparent film support. To achieve direct absorption of X-radiation with the low image noise levels required for dental diagnostics while enhancing image invariance as a function of processing solution seasoning silver halide grains containing less than 5 mole percent iodide, based on silver, forming the emulsion layers are coated on each face of the support at a silver coverage of greater than 7.5 g/m.sup.2, greater than 75 percent of total grain projected area being accounted for by tabular grains having an average equivalent circular diameter of less than 5.0 .mu.m, an average thickness of less than 0.36 .mu.m, and an average aspect ratio of at least 5.
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Research Disclosure, Item 18431, Radiographic films/materials, Section XII, p. 437, Aug. 1979.
Eastman Kodak Company
Neville Thomas R.
Thomas Carl O.
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