摘要
背景:随着多层探测器螺旋CT的广泛应用,已使胃肠道等空腔脏器的CT检查成为可能。目的:通过结肠充气CT结肠造影扫描,评价二维和三维图像对结肠病变检出的有效性以及各自的优势和不足。方法:38例患者导泻后经肛门注入适量空气,行多层螺旋CT扫描,再经工作站对扫描获得的容积数据进行后处理,获得多平面重组的冠、矢状面图像、表面重建、透明重建、仿真内窥镜和管腔展开图像,由2位有经验的影像科医师对上述图像进行分析,评价结肠病变的性质、位置、大小和肠外表现,并与电子结肠镜或手术病理结果对照。结果和结论:除1例为家族性息肉病外,其余37例患者共检出17枚息肉、20个结肠肿块和5例结肠炎性病变。对3种类型病变的检出率,多平面重组分别为82%、100%和100%;仿真内窥镜分别为100%、100%和80%;表面重建分别为41%,90%和40%;透明重建分别为47%、90%和40%。管腔展开技术对所检病变的显示率达100%。二维图像可对结肠病变准确定位并精确测量大小,在显示结肠病变肠外表现方面的优势明显,仿真内窥镜的敏感性较高,管腔展开技术又进一步避免了检查盲区,表面重建和透明重建在显示结肠全景方面价值较高。
BACKGROUND：CT examination of gastrointestinal tract becomes possible with the widely using of multi-slice spiral CT.OBJECTIVE：To evaluate the validity of two-and three-dimensional post processing techniques of CT colonography.METHODS：CT colonography data by multi-slice spiral CT of 38 patients with suspicious colon disease were analyzed.Two-dimensional techniques concluded the original axial images and coronal and sagittal images obtained by multi-planar reformation （MPR）.Three-dimensional techniques concluded CT virtual colonoscopy,shaded surface display,raysum and virtual pathology （luman unfolded）.The location,size and appearance around colon were evaluated by two imaging physicians and compared with surgical findings and electronic colonoscope.RESULTS AND CONCLUSION：A total of 17 polyps,20 masses,and 5 cases of colonic inflammation were detected except one case of familial adenoma polypsis.The detection ratio of there diseases was：82%,100%,and 100% for MPR;100%,100%,and 80% for CT virtual colonoscopy;41%,90%,and 40% for shaded surface display;47%,90%,and 40% for raysum.The detection ratio for virtual pathology （luman unfolded） was 100%.Two-dimensional images are the foundation of multi-slice CT and can evaluate the position,size and density of colon disease objectively,and exhibits advantages in showing information outside the affected colon segments.The sensitivity of CT virtual colonoscopy is higher than other techniques.Virtual pathology can avoid the blind area of colon lumen.Shaded surface display and raysum have advantage on display the overall view of colon.
出处
《中国组织工程研究与临床康复》
CAS
CSCD
北大核心
2011年第4期679-682,共4页
Journal of Clinical Rehabilitative Tissue Engineering Research
