title: Evaluation of colonic lesions and pitfalls in CT colonography: a systematic approach based on morphology, attenuation and mobility.
abstract: Computed tomographic colonography is a reliable technique for the detection and classification of neoplastic and non-neoplastic lesions of the colon. It is based on a thin-section CT dataset of the cleansed and air-distended colon, acquired in prone and supine position. Two-dimensional and 3D projections are used in combination for image interpretation. The evaluation of CT colonography datasets is based on two steps, lesion perception to detect a polyp candidate and image interpretation to correctly characterize colonic filling defects. A thorough knowledge of the morphologic and attenuation characteristics of common colonic lesions and artifacts facilitates characterization of the findings. The purpose of this review article is to give an overview of the key CT colonographic imaging criteria to correctly characterize common colorectal lesions and to identify typical pitfalls and pseudolesions.
authors: Department of Radiology, Medical University of Vienna, Waehringer Guertel 18-20, 1090 Vienna, Austria. thomas.mang@meduniwien.ac.at
authors: Thomas
authors: T
authors: Mang
authors: Stefaan
authors: S
authors: Gryspeerdt
authors: Wolfgang
authors: W
authors: Schima
authors: Philippe
authors: P
authors: Lefere
mesh_terms: D016477:Artifacts; D003106:Colon / Q000000981:diagnostic imaging*; D003108:Colonic Diseases / Q000000981:diagnostic imaging*; D023881:Colonography, Computed Tomographic / Q000379:methods*; D003951:Diagnostic Errors / Q000517:prevention & control*; D006801:Humans; D011856:Radiographic Image Enhancement / Q000379:methods*