Patent ID: 7347622
Filing Date: 2008-03-25
Classification: A61B

Abstract:
1. An X-ray CT scanner comprising: a rotary device comprising an X-ray generator and an X-ray detector opposing to each other, to be provided for interposing an object between them; a rotary mechanism for rotating the rotary device around a rotary axis; a mechanism for moving the rotary axis of the rotary mechanism in a two-dimensional direction crossing the rotary axis; and a controller which controls the rotary mechanism and the mechanism for moving the rotary axis, wherein rotation of the rotary device by the rotary mechanism and movement of the rotary axis by the mechanism for moving the rotary axis are synchronized so as to set a rotation center of a synthesized motion of the rotation of the rotary device and the movement of the rotary axis at a point in a region of interest during a CT scan, the rotation center being different from and defined independently of the rotary axis; whereby a magnification is changed by setting a distance between the X-ray generator and the rotation center and/or a distance between the X-ray generator and the rotation center.