Patent ID: 8360639
Filing Date: 2013-01-29
Classification: A61B

Abstract:
1. An assist apparatus for a radiation imaging system including a radiation source for applying radiation to a body, a radiation detection device, opposed to said radiation source, for detecting said radiation transmitted through said body, to produce an image, a first moving device for moving said radiation detection device on a path parallel with a detector surface thereof, a shift detector for detecting a position of said radiation detection device, a second moving device for moving said radiation source linearly according to a detection signal from said shift detector, to follow movement of said radiation detection device, a rotational support device for supporting said radiation source in a rotatable manner about an axis, to adjust an orientation angle thereof, said assist apparatus comprising: an angle detector, disposed on said radiation source removably, for detecting said orientation angle; a shift determiner for operating when said radiation source is moved pivotally with said rotational support device, and for determining a shift amount for shifting said radiation detection device to a position opposed to said radiation source according to said orientation angle from said angle detector and a distance between said radiation source and said radiation detection device; and a pseudo signal generator for generating a pseudo signal of a level irrespective of said shift amount by correcting said detection signal from said shift detector according to said shift amount from said shift determiner, and for supplying said second moving device with said pseudo signal.