Alternatives

Colonoscopy is more accurate in detecting lesions than a barium enema or a "virtual colonoscopy". If a lesion is detected with these techniques a colonoscopy is still necessary. Virtual colonoscopy currently can miss up to 10-30% of significant polyps. No samples can be taken with these techniques.

Virtual colonoscopy is a special type of CT scan. It involves the same bowel preparation as a fiberoscopic colonoscopy and if any lesions are found, you will require a repeat full preparation prior to the colonoscopy procedure. Due to significant air placed in the bowel, 50% of patients find virtual colonoscopy uncomfortable. Virtual colonoscopy is, however, used for patients for whom colonoscopy is considered unsafe or incomplete. Virtual colonoscopy also involves exposure to X-Rays.

This is a useful screening test for colorectal cancer in people without symptoms. However, on its own it only detects approximately 30% of bowel cancer. If this test is positive, then you will need a colonoscopy. If you have symptoms of a bowel disorder, then this test is not the appropriate test.

This capsule is designed, at this stage, for only looking at the small intestine. Very minimal views are obtained of the colon.

This is excellent for detecting pathology within the abdomen predominantly involving the solid organs such as the liver, spleen and pancreas. It is not good for the detection of polyps. It can be useful for the detection of diverticulitis.