Patent ID: 7135277

Claim:
A photothermographic material used for a method of forming an image, which comprises performing X-ray imagewise exposure with a fluorescent intensifying screen and thermal development, wherein the photothermographic material comprising: on at least one side of a support, an image forming layer comprising at least a photosensitive silver halide, a non-photosensitive organic silver salt, a reducing agent, and a binder, wherein (1) the photosensitive silver halide comprises tabular grains having a mean aspect ratio of 2 to 100 and a mean equivalent spherical diameter of 0.3 μm to 10 μm, (2) an exposure value necessary for obtaining an image density of fog+0.5 after exposing the photothermographic material with monochromatic light having the same wavelength as the main emission peak wavelength of the fluorescent intensifying screen and having a half width of 15 nm±5 nm and thermally developing the photothermographic material is from 1×10 −6 watt·sec·m −2 to 1×10 −3 watt·sec·m −2 , and (3) haze of the photothermographic material after thermal devolpment is less than 80% of that before thermal development.