Detection of colorectal polyps by computed tomographic colography: Feasibility of a novel technique
Detection of colorectal polyps by computed tomographic colography: Feasibility of a novel technique
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DOI：
10.1053/gast.1996.v110.pm8536869
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发表时间：
1996-01-01
期刊：
影响因子：
29.4
通讯作者：
Ilstrup, DM
中科院分区：
文献类型：
--
作者：
Hara, AK;Johnson, CD;Ilstrup, DM
背景和目标：CT结肠成像（CT colography，CTC）是一种新的结肠息肉检测技术，本研究旨在通过人工结肠模型确定CTC的最佳扫描参数，并评估CTC检测临床意义上的结肠息肉的可行性。方法：采用螺旋CT对结肠模型进行多参数扫描。然后对重建的二维和三维图像进行息肉检测和图像质量分级。随后，10例已知结肠息肉的患者在结肠镜检查前立即接受CTC检查，将两位放射科医生使用CTC检测到的息肉数量与结肠镜检查结果进行比较，作为金标准。结肠模型的最佳扫描参数为层厚5 mm，床速5 mm/s，重建间隔1 mm。10名患者通过结肠镜检查有30个息肉（范围，0.2-2.0 cm），所有大于或等于0.5 cm的息肉均为腺瘤，两名观察者的CTC息肉检测率为100%（5/5）大于或等于1 cm，71%（5/7）介于0.5和0.9 cm之间，11%-28%（2-5/18）
Background & Aims: Computed tomographic colography (CTC) represents a novel technique for colorectal polyp detection, A prospective study was undertaken to determine the optimal CTC scanning parameters based on an artificial colon model and to assess the feasibility of CTC to detect clinically significant colorectal polyps,Methods: A colon model was scanned by helical computed tomography at multiple parameters. Reformatted two-dimensional and three-dimensional images were then graded for polyp detection and image quality, Subsequently, 10 patients with known colon polyps underwent CTC immediately before colonoscopy, The number of polyps detected by two radiologists using CTC were compared with colonoscopy results that served as the gold standard,Results: The optimal scanning parameters in the colon model were 5-mm collimation, 5 mm/s table speed, and 1-mm reconstruction interval. Ten patients had 30 polyps (range, 0.2-2.0 cm) by cotonoscopy, and all polyps greater than or equal to 0.5 cm were adenomas, Polyp detection by CTC for both observers was 100% (5 of 5) greater than or equal to 1 cm, 71% (5 of 7) between 0.5 and 0.9 cm, and 11%-28% (2-5 of 18)