Patent ID: 7980760

Claim:
An X-ray inspection apparatus that detects X-rays irradiated to and transmitted through a target object in order to inspect the target object, the X-ray inspection apparatus comprising: a transport conveyor configured to convey the target object in a predetermined direction; an X-ray irradiation unit configured to irradiate the target object conveyed by the transport conveyor with X-rays; a line sensor including a plurality of pixels configured to detect X-rays irradiated from the X-ray irradiation unit and transmitted through the transport conveyor at a plurality of prescribed positions of the transport conveyor in a state in which the target object is not placed on the transport conveyor; a determination unit configured to determine, based on an average of X-ray amounts detected by the pixels of the line sensor obtained at each of the prescribed positions of the transport conveyor, whether each of the prescribed positions of the transport conveyor is an appropriate position for calibrating the line sensor; and a calibrating unit configured to calibrate the line sensor based on detection results obtained by the line sensor at a position that is determined by the determination unit to be the appropriate position for calibrating the line sensor.