Patent ID: 7190761

Claim:
An X-ray image radiographing method of radiographing an object of a breast, comprising a sharpness enhancing step of increasing a sharpness of an image lowered due to penumbra by enhancing an edge of the image with refraction contrast enhancement; the sharpness enhancing step comprising steps of: using an X-ray tube having a size D of focal spot defined by the following formula: 100 μm≦ D≦ 600 μm; setting a distance R 1 between the X-ray tube and an object of a breast so as to be within a range defined by the following formula: ( D− 7)/200 m≦ R 1≦5 m; and setting a distance R 2 between the object and an X-ray detector so as to be within a range defined by the following formula: 0.15 m≦ R 2≦1.4 m.