Patent ID: 7522709

Claim:
An X-ray examination method using an X-ray examination apparatus for examining an examining portion of an object by X-ray irradiation, the apparatus including a detection surface for detecting an intensity distribution of an X-ray set and entered to a position specified out of predetermined positions, an X-ray source capable of moving an X-ray focal position on a target surface and generating the X-ray, and a storage device for storing history information on generation of the X-ray at the position on the target surface as the X-ray focal position, the method comprising the steps of: setting the X-ray focal position corresponding to a position of the detection surface specified out of a plurality of first predetermined positions and the examining portion; detecting that an X-ray radiation dosage generated from the set X-ray focal position has exceeded a predetermined amount based on the history information of the storage device; changing and setting a specified position of the detection surface to one of a plurality of second predetermined positions different from the plurality of first predetermined positions according to the detection result; moving the X-ray focal position to a position reset according to the changed detection surface, and generating the X-ray; and detecting an intensity distribution of the X-ray transmitted through the examining portion on the detection surface.