| 摘要 |
PURPOSE:To provide high sharpness by forming an emulsion layer contg. flat platelike silver halide particles whose size is >=5 times the thickness and an outer silver halide emulsion layer on at least one side of a direct X-ray dilm having silver halide emulsion layers on both sides of a transparent support. CONSTITUTION:An emulsion layer contg. flat platelike silver halide particles whose size is >=5 times the thickness and >=1 outer silver halide emulsion layer are formed on at least one side of a direct X-ray film having silver halide emulsion layers on both sides of a transparent support. Fluorescent screens are arranged with the X-ray film in-between, X-rays are irradiated to generate blue or green fluorescence, and the emulsion layers are exposed to the fluorescence to form an image. At this time, said flat platelike silver halide particles prevent the formation of a latent image giving an unclear image in the opposite emulsion layer. Thus, a photosensitive materil with high sensitivity, superior sharpness and high silver using efficiency is obtd. without exerting unfavorable influence on the photographic performance.
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