Specialist diagnostic tests
Also known as virtual colonoscopy, is a non-invasive way to screen for polyps or cancer in the colon (large intestine). It is a much more comfortable alternative to using an endoscope (a tube with a camera at the end), inserted into the large intestine through the rectum. Polyps are growths on the lining of the intestine. Some polyps may grow and turn into cancers. CT colonography uses low dose x-rays and computer technology to find these growths in their early stages so they can be removed before cancer has a chance to develop.
The procedure is most commonly performed for obscure gastrointestinal bleeding, possible Inflammatory Bowel Disease and obscure abdominal pain. It is most commonly carried out after endoscopic examination of the colon or stomach fail to determine the cause.