基于亚毫米CT扫描数据的肝外胆管供血动脉三维可视化模型构建  

Construction of a three- dimensional visualization model of arteries supplying the extrahepatic bile duct based on submillimeter CT data

作　　者：杨剑[1] 方驰华[1] 范应方[1] 彭戈[1] 项楠[1] 祝文[1] 刘军[1] 鲍苏苏[2] 

机构地区：[1]南方医科大学珠江医院肝胆一科,广东广州510282 [2]华南师范大学计算机学院,广东广州520631

出　　处：《南方医科大学学报》2014年第7期945-949,共5页Journal of Southern Medical University

基　　金：国家高技术研究发展计划(863计划)项目(2006AA02Z346;2012AA021105);国家自然科学基金(81170458);广东省重大科技专项(2012A080203013);广东省医学科研基金(A2012370);广东省中国科学院全面战略合作项目(2010A09010003)~~

摘　　要：目的构建肝外胆管供血动脉三维可视化模型,研究基于亚毫米CT数据精细管道分割新方法。方法把基于体绘制交互的图像分割新算法作为一个分割插件整合到医学图像三维可视化系统(MI-3DVS)中,再将10名受检者的腹部64层亚毫米CTA数据导入MI-3DVS,程序化构建肝外胆管及供血动脉的3D模型。然后对3D模型进行缩放、旋转、融合拆分以及透明化显示等操作,观察、分析3D模型中的肝外胆管供血动脉来源、走行、分布特点。结果 10例肝外胆管血供3D模型立体感强,可精确显示肝动脉的4到5级分支、胆囊动脉的2级分支、胰十二指肠动脉弓及门静脉后动脉;胆道3D模型可清晰显示肝内胆管、左右肝管、胆囊、肝总管、胆总管等胆道各部分。结论基于体绘制交互的分割方法能够对肝外胆管供血小动脉进行分割、提取;使用MI-3DVS重建的3D模型能够真实反映个体化的肝外胆管及供血动脉立体解剖结构。Objective To construct a three-dimensional （3D） model of arteries supplying the extrahepatic bile duct with a new segmentation algorithm based on submillimeter CT data. Methods The new image segmentation algorithm based on interactive volume rendering was integrated into Medical Image Three-Dimensional Visualization System （MI-3DVS） as an intersected plug-in. The abdominal submillimeter CTA data of 10 patients were imported into MI-3DVS and the 3D model of the extrahepatic bile duct and its supplying arteries were constructed. The 3D model was zoomed in, zoomed out and spinned for observation and analysis of the arteries supplying the extrahepatic bile duct. Results The 3D models of the blood supply to extrahepatic bile duct allowed stereoscopic, and accurate display of the fourth-and fifth-level branches of the hepatic artery, the second-level branches of the cystic artery, the pancreatic duodenal artery arch and the retroportal artery. The 3D models also provided a clear vision of the biliary structures including the hepatobiliary tract, the left and right hepatic ducts, gallbladder, the liver duct, and the common bile duct. Conclusions Based on the segmentation method of interactive volume rendering, the CT data of the arterioles supplying the extrahepatic bile duct can be extracted and segmented for 3D reconstruction to display the three-dimensional anatomical structures of the extrahepatic bile duct and its supplying arteries.

关 键 词：亚毫米CT 肝外胆管 供血动脉 三维重建 

分 类 号：R657.4[医药卫生—外科学]