左肝内胆管结石患者的64排CT数据集的三维重建和左肝切除可视化仿真手术的研究

目的 探讨64排螺旋cT的左肝内胆管结石的扫描数据,进行图像程序分割、三维重建和左肝切除术的可视化仿真手术.方法 利用64排cT扫描采集肝内胆管结石的数据集.运用医学图像处理系统(MIPS)对CT序列图像进行程序分割和三维重建,得到肝胆三维模型的数据以标准模板库STL格式输出,然后导入FreeForm Modeling System(FreeForm)利用自行开发的虚拟手术器械进行左肝切除的可视化仿真手术.结果 利用MIPS软件进行肝内胆管结石二维的CT图像程序分割速度快、效果满意.将分割的数据进行三维重建所获得的肝胆模型结构清晰、立体感强,形态逼真,可完成左肝切除的可视化仿真手术.结论 MIPS可以有效、快速地完成肝内胆管结石的64排螺旋CT的二维图像数据的程序分割、三维重建及在FreeForm进行左肝切除可视化仿真手术,为仿真的胆道外科手术提供思路.

Thres-dimensional reconstruction and visible simulation of left hepatectomy of the patients with calculi of the left intrahepatic ducts based on the data of 64-slice helical CT scanning

Objective To explore image sequence segmentation and three-dimensional (3D) reconstruction and visible simulation of left bepatecomy of patients with calculi of the left intrahepatic ducts based on the data of 64- slice helical CT scanning. Methods The CT data of the patients with calculi of the left intrahepatie ducts were collected by the 64- slice helical CT scanning; The automatic image sequance segmentation and 3D reconstruction were proceeded according to the CT sequence images by the self-designed software- Medical Image Process System (MIPS). Finally, 3 D hepatobiliary model was exported with the STL formatting and imported into FreeForm Modeling System for visible simulation left bepatecomy with the self-developmented operating appliances. Results It was an effective way to obtain the segmentation data and 3D reconstruction models of liver and calculi of the left intrahepatic ducts to be processed by MIPS. The 3D models based on the segmentation data had high fidelity and strong 3D effect. The visible simulation of left bepatecomy of the patients with calculi of the left intrahepatic ducts could be completed in FreeForm by the 3D models. Conclusion In this study, MIPS could correctly and rapidly complete 2D CT image sequence segmentation and 3D reconstruction according to the data of calculi of the left intrahepatic ducts of 64-slice helical CT scanning. The visible simulation of left hepatecomy could be cartied out in FreeForm Modeling System. They offered a method of simultion surgery of biliary tract and conduced to solve the problem of the biliary tract surgery.