Patent ID: 6139183
Filing Date: 2000-10-31
Classification: A61B,G01N,G03B

Abstract:
An X-ray exposure system comprising:a mobile cart;an X-ray apparatus mounted on said mobile cart, said X-ray apparatus including an X-ray source and an X-ray receiver, said X-ray source emitting an X-ray beam which proceeds along a beam path and strikes said X-ray receiver, and support means on which said X-ray source and said X-ray receiver are mounted for moving said X-ray source and said X-ray receiver relative to an examination subject for obtaining a plurality of successive 2D projections of said examination subject respectively from a plurality of different projection directions, each of said 2D projections having a unique projection geometry of the X-ray source and the X-ray receiver at a point in time at which the respective 2D projections are obtained, said support means having a mechanical instability associated therewith which precludes accurate identification of the projection geometry via said support means;means disposed outside of said beam path for directly acquiring the respective projection geometries for said plurality of 2D projections; andcomputer means supplied with said plurality of projection geometries from said means for directly acquiring the respective projection geometries, for reconstructing a 3D image of said examination subject from said plurality of 2D projections.