Computed Tomography (CT) Imaging Study



CT colonography is a radiology test that looks at the colon (large intestine).

Possible Complications

This procedure is safe. Rarely, a person may be allergic to the contrast material that is sometimes used.



This content is reviewed regularly and is updated when new and relevant evidence is made available. This information is neither intended nor implied to be a substitute for professional medical advice. Always seek the advice of your physician or other qualified health provider prior to starting any new treatment or with questions regarding a medical condition.

Edits to original content made by Denver Health.

a (Computed Tomography Colonography; Virtual Colonoscopy)


American College of Gastroenterology 

National Institute of Diabetes and Digestive and Kidney Diseases 


Canadian Association of Gastroenterology 

Canadian Cancer Society 


CT colonography. Radiology Info—American College of Radiology website. Available at: Accessed March 19, 2021.

Scalise P, Mantarro A, et al. Computed tomography colonography for the practicing radiologist: A review of current recommendations on methodology and clinical indications. World J Radiol. 2016 May 28;8(5):472-483.

Virtual colonoscopy. EBSCO DynaMed website. Available at: Accessed March 19, 2021.