In a traditional colonoscopy, a camera is inserted into the colon via the anus and the colon is examined for the presence of polyps or other abnormalities (lesions). Virtual colonoscopy uses a computed tomography (CT) machine to take many X-rays of the colon.
Get more details on virtual colonoscopy in the colonoscopy section.
For more information about colonography visit the Winship Cancer Institute of Emory University.
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