title: CT colonography: methods, pathology and pitfalls.
abstract: Computed tomography colonography (CTC) is a relatively new technique that is currently challenging more established methods of large bowel imaging. Several workers have suggested CTC surpasses the barium enema and approaches conventional endoscopy for detection of colorectal neoplasia. Accurate diagnosis relies on technically good studies, the main aim of which is adequate bowel cleansing and distension. Furthermore, the learning curve is steep and normal colonic anatomy has to be re-learned in a CT context. This review aims to describe the technique, revise the imaging features of both normal and pathological colon, and to highlight potential diagnostic pitfalls and their avoidance.
authors.affiliation: Department of Intestinal Imaging, St Mark's Hospital, Northwick Park, Harrow, Middlesex, London, UK.
authors.forename: S A
authors.initials: SA
authors.lastname: Taylor
authors.forename: S
authors.initials: S
authors.lastname: Halligan
authors.forename: C I
authors.initials: CI
authors.lastname: Bartram
mesh_terms: D003092:Colitis / Q000000981:diagnostic imaging / Q000473:pathology; D003111:Colonic Polyps / Q000000981:diagnostic imaging / Q000473:pathology; D023881:Colonography, Computed Tomographic / Q000379:methods*; D015179:Colorectal Neoplasms / Q000000981:diagnostic imaging* / Q000473:pathology; D006801:Humans; D008505:Medical Staff, Hospital / Q000193:education