Department of Radiology, Medical University of Vienna, Waehringer Guertel 18-20, 1090 Vienna, Austria.
Eur J Radiol. 2013 Aug;82(8):1177-86. doi: 10.1016/j.ejrad.2012.05.024. Epub 2012 Jul 19.
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.
计算机断层结肠成像术是一种可靠的技术，可用于检测和分类结肠的肿瘤性和非肿瘤性病变。它基于清洁和充气后的结肠的薄层 CT 数据集，在俯卧位和仰卧位采集。二维和三维投影结合用于图像解释。CT 结肠成像数据集的评估基于两个步骤，病变感知以检测息肉候选物和图像解释以正确描述结肠充盈缺损。深入了解常见结肠病变和伪影的形态和衰减特征有助于对发现进行特征描述。本文的目的是概述正确描述常见结直肠病变的关键 CT 结肠成像影像学标准，并识别典型的陷阱和假性病变。
