Patent ID: 6038282
Filing Date: 2000-03-14
Classification: A61B,G01N,G06T,Y10S

Abstract:
An X-ray imaging system comprising:an X-ray radiator which emits an X-ray beam;a radiation receiver comprising a digital detector of X-rays emitted by said X-ray radiator;holding means, on which said X-ray radiator and said radiation receiver are mounted, for moving said X-ray radiator and said radiation receiver relative to a measuring field for transirradiating said measuring field in a plurality of different directions, and with a projection geometry associated therewith, said radiation receiver producing signals corresponding to radiation incident therein in each of said different directions; anda computer, supplied with said signals from said radiation detector, which reconstructs an image of a subject in said measuring field from said signals, said computer comprising means for describing said projection geometry in homogenous coordinates by a plurality of projection matrices, and for executing a voxel-driven back projection in homogenous coordinates without any calculation of positional coordinates.