心房颤动导管消融手术模拟中的导管建模技术  

Catheter Modeling in VR Simulation of Catheter Ablation of Atrial Fibrillation

作　　者：黄鹏[1] 晁建刚[1] 陈学文[1] 董建增[2] 

机构地区：[1]中国航天员科研训练中心人因工程重点实验室,北京100094 [2]首都医科大学附属北京安贞医院,北京100029

出　　处：《计算机辅助设计与图形学学报》2012年第9期1139-1144,共6页Journal of Computer-Aided Design & Computer Graphics

基　　金：国家"八六三"高技术研究发展计划基金(2009AA02Z411)

摘　　要：导管的运动与变形对心房颤动导管消融模拟的真实感至关重要.在分析消融导管导向原理的基础上,提出了一种改进的混合质点-弹簧模型,并开发了一个实时的导管消融训练仿真系统.该模型将导管离散为若干个节点,相邻节点之间连接着长度相同的弹簧,模型考虑了弹簧力、阻力、弯曲力以及发生碰撞后的碰撞外力.训练仿真系统主要用于模拟导管在左心房内的运动、变形以及对左心房的采点重建过程,仿真结果表明:导管的运动与实际相符,基本满足医生训练的需求.The motion and deformation characteristics of the catheter play an important role in VR simulation of catheter ablation of atrial fibrillation. Based on the bending mechanism, an improved hybrid mass spring model is presented and the real-time software system of catheter ablation is developed. The model divides the catheter into several nodes, which are linked by springs with the same length. The model considers the main mechanical properties of the catheter, such as spring force, damping force, bending force, as well as contact force due to collision with the heart. The system can simulate the motion and deformation of the catheter, and the electrophysiological mapping of the left atrium. The simulation result shows that the behavior of the catheter matches the practical situation, which can satisfy the doctor＇s training requirement.

关 键 词：消融导管 质点弹簧模型 物理建模 虚拟训练 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]