基于网格-无网格模型的软组织形变方法

Soft tissue deformation method based on mesh and meshless model

针对传统软组织形变方法中真实感与实时性难以平衡的问题,提出了一种基于网格与无网格混合的软组织形变方法。在大变形的手术区域采用无网格方法,在小变形的手术区域采用基于质点弹簧的网格方法,充分发挥两者的优势,达到真实感与实时性要求。实验结果表明,基于网格与无网格混合的形变方法具有较高的计算效率,且形变效果较好,能够满足虚拟手术仿真的操作流畅性,增强虚拟手术仿真的真实感。

Aiming at the problem that the reality and real-time of traditional soft tissue deformation methods are difficult to balance,a new method of soft tissue deformation based on mesh and meshless model is proposed.Meshless model is used in large deformation operation area,while the mesh method based on particle spring was used in small deformation operation area.The goal is to take full advantage of both achieving the realism and real-time requirements.The experimental results show that the mesh and meshless model has high computational efficiency and good effectness,which can satisfy the operation fluency of virtual surgery simulation and bring the operator a vivid visual experience at the same time.