Definition
The CT scanner is a special X-ray machine that produces images of your heart and the blood vessels supplying your heart muscle. It is an open, ring-like piece of equipment that resembles a doughnut rather than a tunnel. Within the wall of the upper part of the ring, there is an X-ray tube that beams the X-ray from different angles to be picked up by detectors on the lower part of the ring. The detectors are used to detect the strength of the beams that are emitted from your body. A computer then uses the information from the detectors to produce images of your heart and blood vessels around it.
Leaflet
This leaflet explains how to prepare and what to expect during a CT scan.