Improvements in or relating to radiography

This patent claim, on behalf of E.M.I. Ltd., relates to overcoming the difficulties previously encountered in computerised axial tomography, where the collimator for each detector needs to follow the motion of the source through an appreciable angle, e.g. 400, but the motion of the source, being caused by electronic scanning, is so rapid as to cause difficulties for a mechanical movement imparted to the collimators. (U.K.)