【摘要】 目的　探讨CT三维容积重建 (volumerendering ,VR)脑血管造影的成像方法 ,评价其临床价值。方法　分析 6 2例CT三维容积重建法脑血管造影的图像 ,三维观察正常血管及血管病变显示情况 ,同时与表面遮盖法 (surfaceshadedisplay ,SSD)、最大强度投影法 (maximumintensityproject,MIP)图像比较 ;并对照DSA和 (或 )手术结果。结果　VR法脑血管造影显示脑血管分支清楚、走行自然 ,能透过骨结构显示血管管腔、血管之间、血管与周围器官的相互关系。显示脑血管病变 5 0例 ,显示率80 6 % ;与DSA或手术结果对照 ,48例诊断正确 ,2例假阳性 ,诊断正确率为 96 0 %。VR图像脑血管的显示与SSD、MIP比较差异无显著性意义 (P >0 .2 5 )。结论　VR法脑血管造影是最新的快速而有效的无创伤性三维血管成像术 ,能部分替代并弥补DSA ;VR图像具有显示血管管腔、重叠血管及避免去骨处理等优点更多还原

【Abstract】 Objective To study the methodology and assess the clinical value of three-dimensional CT angiography (3D-CTA) with volume rendering (VR) in cerebral vessels. Methods Sixty-two patients were examined by means of 3D-CTA with volume rendering. VR was used in the reconstruction of 3D images, and the demonstration of normal vessels and vascular lesions were particularly analyzed. At the same time, comparisons were made between the images of VR and SSD, MIP, and also between the diagnosis of VR-CTA and DSA or postoperative results. Results In VR images, cerebral vessel routes and vessel cavities were showed clearly, while the relationship among vascular lesions, surrounding vessels, and neighboring structure was distinguished. 50 cases (80.6%) were found positive, 48 of which were correct and 2 were false-positive compared with DSA or postoperative results. The accurate rate of diagnosis was 96.0%. There was no obvious difference in showing the cerebral vessels among the images of VR, SSD, and MIP (P>0.25). Conclusion Three-dimensional CT cerebral angiography with VR is a new noninvasive effective method. It can even partly replace the DSA. The 3D-images have the characteristics of showing the cerebral vascular cavity and overlapped vessels without cutting the skull.更多还原