The CT colonography technique with virtual endoscopy is a modern imaging diagnostic method that allows the detection of abnormalities, lesions or tumors in the colon that many other methods cannot perform.

Colonography is a technique that uses X-rays through a scanner to examine the structure of the colon. Colonography provides clear and detailed images. It also has the ability to reconstruct the colon from cross-sectional slices, so it is also called virtual colonoscopy.

Colorectal cancer is cancer of the colon or rectum. It is usually diagnosed by endoscopy, CT endoscopy, or air-contrast barium enema. In addition, the doctor may also request abdominal CT scans and CT, PET-CT, pelvic MRI, or endoscopic ultrasound to assess the cancer and look for signs of spread.