ABSTRACT
This type of film is only produced under hospital conditions and consists of multiple exposures in each of several planes through one part of the body. Instead of the X-rays being used to expose a film they are collected by a receiver and turned into an electronic signal which is recorded on magnetic tape. By the use of a computer, these multiple images can be reconstructed to show clear slices through the body or even, if the relevant software is available, build up into three dimensional images (Plates 5; and 6, overleaf ).
