CT scan (CAT scan)
CT SCAN is basically an x-ray tube that rotates in a circle around the patient and takes a series of pictures as it rotates. The multiple x-ray pictures are reconstructed by a computer in axial slice images at different levels. Each level can be examined separately.
A CT scan may show if the cancer has spread beyond the liver or to other parts of the body such as the lymph nodes.
The scan takes from 10-30 minutes. You may be given a drink or injection of a dye, which allows particular areas to be seen more clearly. For a few minutes, this may make you feel hot all over. If you are allergic to iodine or have asthma you could have a more serious reaction to the injection, so it is important to let your doctor know beforehand.
You will probably be able to go home as soon as the scan is over.