大肠充气法MSCT成像在大肠病变检查中的价值

MSCT Evaluation of Colonic Lesion by Pneumocolon

目的:探讨大肠充气法64排CT成像在大肠病变检查中的临床价值。方法:57例疑诊大肠病变患者完成大肠充气法64排CT三期增强扫描(对比剂开始注射后25s、48～50s、58s),采用Siemens64扫描仪,在工作站完成CT仿真内镜、多平面重组、容积重建等后处理观察,并与肠镜或手术病理对照。结果:CT检出大肠病变46例,误漏诊5例,诊断敏感度93.3%,特异度73.3%,准确率91.2%,阳性预测值95.5%,阴性预测值76.9%。结论:大肠充气法64排CT成像有较高的大肠病变定性定位诊断准确率,值得推广。

Purpose：To evaluate the value of 64-slice CT in the examination of colonic lesion by pneumocolon. Methods：Fifty-seven patients with colonic lesions underwent MSCT and multiphase contrasted scanning with combining negative contrast agent filling the small intestine and pneumocolon. Contrasted MSCT scans were performed using 64-slices CT system 25 s （phase Ⅰ ）、48-50 s （phase Ⅱ ） and 58 s（phase Ⅲ） after intravenous administration of contrast medium. Images were then obtained by CT virtual endoscopy （CTVE）,multi-planar reformation （MPR）,volume rendering（VR） on post-processing workstation.Results：The sensitivity ,specificity and accuracy were 93.3%,73.3% and 91.2%,respectively. Conclusion：The use of 64-slice CT in the examination of colonic lesion by pneumocolon can further improve the accuracy of qualitative diagnosis and localization diagnosis in colonic lesions.