Patent attributes
An X-ray imaging system is disclosed which can effect positioning of an X-ray irradiator and an X-ray receiver in an adaptive manner. The X-ray imaging system uses an X-ray irradiator and an X-ray receiver opposed to each other through a space to radiograph a subject positioned between the two and comprises radiographing device having the X-ray irradiator and the X-ray receiver, optical radiographing device for picking up an optical image of the subject, specifying device for analyzing the optical image and specifying physical characteristics of the subject, and positioning device for positioning the X-ray irradiator and the X-ray receiver of the radiographing device on the basis of the specified physical characteristics and a portion to be radiographed of the subject.