摘要
目的 :探讨CT仿真内镜 (CTVE)的临床应用价值及其适应证 ,并对其应用前景作一展望。方法 :对 5 48例经纤维内镜、手术病理或临床证实的患者行CTVE成像 ,分别观察CTVE上各部位的正常解剖结构图像、分析不同疾病的CTVE影像学表现 ,计算CTVE显示病变的敏感性和特异性 ,并与纤维内镜、手术病理结果及其它成像方法对照。结果 :通过选择不同的观察方位、角度和阈值 ,CTVE能清楚显示靶器官内正常解剖结构的立体影像和病变的部位、大小、形态及其侵犯范围。CTVE显示病变的敏感度为 72 .7%～ 93 .8%。结论 :CTVE对腔内病变的显示提供了一种非创伤性、全新的影像学技术 ,能弥补常规CT图像和纤维内镜的不足 ;实际工作中 ,应根据病变的部位和性质合理选择CTVE成像技术 ,并密切结合轴位和多平面重建 (MPR)图像才能对病变做出全面。
Objective:To evaluate the value of clinical applications, indications and perspectives of helical CT virtual endoscopy (CTVE).Methods:CTVE was performed in 548 patients confirmed by conventional endoscopy, pathology or clinical information. On CTVE images, the normal anatomic structures and the imaging manifestations of diseases were investigated respectively, and the sensitivity and specificity for the detection of the lesion were calculated. The results were then compared with the findings of conventional endoscopy,surgery and other images of helical CT. Results:By choosing the different orientation and angle of view and threshold values, CTVE could clearly display the three dimensional image of the normal anatomic structures, the location, size, surface morphology and extent of the lesion. The sensitivity of CTVE in detecting lesions was 72.7%～93.8%. Conclusion:CTVE has proved to be a new and noninvasive technique in the detection of intraluminal lesions, and can make up for some disadvantages of the conventional endoscopy and other images of helical CT. In practice, CTVE should be appropriately used dependent on the location and nature of lesions, and must be closely combined with the interpretation of axial and multiplanar reformation (MPR) images in order to evaluate completely the lesions in a comprehensive way.
出处
《放射学实践》
2004年第6期430-434,共5页
Radiologic Practice
