质量-弹簧模型的两种快速算法  

Two Fast Algorithms for Mass-Spring Model

作　　者：蒋春涛[1] 鲍旭东[1] 郭宏宇[1] 

机构地区：[1]东南大学生物医学工程系影像实验室,江苏南京210096

出　　处：《中国医疗器械杂志》2004年第2期102-104,108,共4页Chinese Journal of Medical Instrumentation

摘　　要：介绍质量-弹簧模型的准静态模拟和直接计算两种快速算法。准静态模拟假设物体在形变过程中总处于静态平衡;直接计算方法是计算最小化系统势能的最优解,同时也考虑了组织的不可压缩性。实验结果表明,与常规数值迭代算法相比,这两种算法的运算速度快而且鲁棒性好。This paper presents two fast algorithms of mass-spring model: quasi-static simulation and direct computation method. It is assumed in quasi-static simulation that the object is always in static equilibrium while deforming. In algorithm of direct computation, it estimates directly the rest position which minimizes the total potential energy of the system, and moreover it takes incompressibility of soft tissue into account. The test result shows that both of algorithms are very fast and robust in contrast to general numerical iteration methods.

关 键 词：质量-弹簧模型 准静态模拟 直接计算法 医学模拟 生物力学 

分 类 号：R318.01[医药卫生—生物医学工程]