Computerized tomography comprising laterally shifting detected beams within a rotated fan of radiation

摘要

A method of radiographically examining a body is disclosed, wherein a spread of penetrating radiation is projected through a cross-sectional region of the body from a plurality of locations distributed angularly around the body, thus permitting the derivation of signals indicative of the absorption suffered by the radiation on traversing said region along each of a number of mutually divergent beam paths within said spread, for each of said locations. The positions of the beam paths within the spread for irradiation of the body from some of said locations differ from the positions of said paths within said spread for irradiation of the body from others of said locations so as to permit the derivation of signals relating to interleaving beam paths through said region.