虚拟手术中的软组织变形仿真研究

Study of the Simulation of Soft Tissue Deformation in Virtual Surgery

虚拟手术中对生物体软组织变形仿真的研究一般采用线弹性物理模型。然而，生物软组织本身呈粘弹性的物理特性。本文通过对软组织生物力学特性的分析，将粘弹性模型应用于手术仿真中软组织变形的研究。在尽量减小算法复杂度的前提下，推导粘弹性模型的计算公式，较好地仿真了在外力作用下软组织的变形。

The existed methods in soft tissue simulation are usually based on linear-elastic physical model, but the soft tissue has the visco-elastic property. Through analysis of biomechanics property of soft tissue, this paper applies the visco-elastic model in the study of soft tissue deformation in surgery simulation. Combining deformation accuracy with computer efficiency, the algorithm achieves more realistic soft tissue deformation based on visco-elastic model.