Lim Yi-Je, De Suvranu
Department of Mechanical, Aerospace and Nuclear Engineering, Rensselaer Polytechnic Institute, Troy, NY 12180, USA.
Stud Health Technol Inform. 2004;98:210-4.
In this paper we present a geometrically efficient algorithm coupled with a physically based numerical scheme using a meshfree approach for the simulation of surgical procedures including surgical cutting in multimodal virtual environments. Progressive cutting, without the generation of new primitives, is achieved by snapping the nearest nodes to the interaction point between the cutting tool and the underlying polygon edge. The realism of the simulations is enhanced by employing a local subdivision algorithm in the vicinity of the tool-tissue interaction region and a cutting gutter to display the interior structure of the soft tissue as the cut opens up. A meshfree method is used to compute the deformation fields and interaction forces.
在本文中，我们提出了一种几何高效算法，并结合基于物理的数值方案，采用无网格方法来模拟手术过程，包括在多模态虚拟环境中的手术切割。通过将最近的节点捕捉到切割工具与底层多边形边缘之间的交互点，实现了渐进式切割，且无需生成新的图元。通过在工具与组织交互区域附近采用局部细分算法以及在切割打开时使用切割槽来显示软组织的内部结构，增强了模拟的真实感。使用无网格方法来计算变形场和相互作用力。
