Yes. Computed tomography (CT) imaging for the colon is called CT colography or, sometimes, a virtual colonoscopy. It may be used when someone can't tolerate a traditional colonoscopy or as part of the diagnostic process. Studies suggest CT colography isn't as effective as colonoscopy for detecting small polyps or very early stage colon cancer, although it may, in some cases, detect polyps situated behind folds of tissue. If a CT colography reveals the presence of polyps, they will need to be removed via a colonoscopy.