| 摘要 |
Disclosed is a silver halide photographic material for medical use, in which the coated amount of silver per surface of the support is 2.8 g/m2 or less, the silver halide grains in the coated silver halide emulsion layer have a silver chloride content of 10 to 50 mol %, they contain 10-8 mol or more, per mol of silver, of an iridium compound and they have been spectrally-sensitized to be sensitive to rays of from 600 to 700 nm wavelength range. The material may be processed by rapid processing and has a high sensitivity and high covering power. Also disclosed is a silver halide photographic material for laser exposure, in which the emulsion contains 10-8 mol or more, per mol of silver, of an iridium compound and is spectrally-sensitized with a sensitizing dye of formula (III): (* CHEMICAL STRUCTURE *) (III) where V1, V2, V3, V4, V5, V6, V7 and V8 each represent a hydrogen atom or a monovalent substituent, and they satisfy the following conditions: where f value of Vk (k=1 to 8) is Vkf, A1=V1f+V2f+V3f+V4f, and A2=V5f+V6f+V7f+V8f; then A1<1.63, or A2<1.63; R1 and R2 each represent a substituted or unsubstituted alkyl group; L1, L2 and L3 each represent a substituted or unsubstituted methine group; M1 represents a charge neutralizing pair ion; and m1 is a number of 0 or more, which is necessary for neutralizing the charge of the molecule. This has high sensitivity and may be processed by ultra-rapid processing system to result in little residual color in the processed material.
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