| 摘要 |
PROBLEM TO BE SOLVED: To provide an X-ray machine which can easily detect the position of an affected portion of a subject and execute correct radiography with a small exposure dose.SOLUTION: A control part 50 comprises: a relative position storage section 51 which stores the relation between the centroid position in a horizontal plane of a subject and the relative position of an affected portion with respect to the centroid position; an affected portion position detection section 52 which detects the position of the affected portion on the basis of the relation between the centroid position in the horizontal plane of the subject and the relative position of the affected portion with respect to the centroid position stored in the relative position storage section 51 and the centroid position detected by a centroid position detector 20; and a position correction section 53 which corrects the position of a collimator leaf in a collimator 32 on the basis of the distance between the focal point of an X-ray tube specified from the position of the affected portion detected by the affected portion position detection section 52 and the affected portion.SELECTED DRAWING: Figure 6 |
