背驮式肝移植可视化仿真手术的研究

目的 研究三维可视化仿真手术技术在背驮式肝移植中的应用价值.方法 利用2例胆总管结石患者的肝脏64排CT扫描数据,对CT图像进行分割,三维重建.重建出的肝脏及其管道模型分别以STL格式导入FreeForm Modeling System进行修饰和平滑.利用系统的力反馈设备,进行背驮式肝移植手术的仿真研究.结果 重建的肝脏模型形态逼真,立体感强;手术模拟过程真实、形象,且有"力"的感受.结论 可视化的肝脏重建模型立体、逼真,有利于肝移植手术方案的合理设计,降低手术风险及减少手术并发症;虚拟肝移植手术有利于医务人员的培训和学习.

Virtual piggyback liver transplantation using three-dimensional imaging technique

Objective To study the value of three-dimensional (3D) visualization and virtual surgery system in piggyback liver transplantation. Methods Two patients who suffered from choledocholithiasis were scanned by 64-slice spiral CT and the data were collected. The segmentation of the hepatic CT images was carried out. The 3D model of the liver and the intrahepatic vessels was reconstructed, and was imported to the FreeForm Modeling System in STL format for smoothing and modifying. Piggyback liver transplantation was simulated with the force-feedback equipment (PHANToM). Results The reconstructed 3D model of the liver was vivid, and the process of the virtual piggyback liver transplantation was verisimilar. Conclusions The 3D model of the liver enables the simulation of piggyback liver transplantation. It can reduce the risk and complications of the surgery, and enhance the communication between doctor and patient through designing surgical plan and demonstrating visualized operation before surgery. Virtual liver transplantation is also helpful during the training of medical workers.