Computed tomography colonography, also known as virtual colonoscopy (VC), was introduced in 1994 by Vining et al. They were the first to describe this modified computed tomography (CT) scan of the large intestine as a diagnostic test for colorectal carcinoma and polyps. Since then, virtual colonoscopy has become an essential test in the imaging of polyps and occult colorectal cancer in patients who are not candidates for optical colonoscopy.