Lung cancer is screened with a low-dose helical or spiral computed tomography scan (CT or CAT). In a CT scan, x-rays are taken from different angles of the inside of the body. A computer then combines these images into a detailed, three-dimensional image showing abnormalities or tumours.
A CT scan may be used to:
CT scan equipment has a circular hole in the middle. A general procedure involves lying on a bed attached to the scanner (either head first or feet first, depending on the part of the body being examined). The bed will then be raised to a height corresponding to the scanner's circular hole. It will be lowered and expanded several times while pictures are being taken. Avoid moving during the scan as it will negatively impact the quality of the images and make them more challenging to interpret by the radiologist.