Soft Tissue Modeling using Nonlinear Mass Spring and Simplified Medial Representation

In this paper, we present a novel approach for real-time simulation of deformable soft tissue. When using Mass-Spring or Finite Element Method to simulate the global deformation of soft tissue dynamically, we'll meet the difficulty that the size of the 3D problem (the number of elements in the Mass-Spring or FEM mesh) is much larger than the 2D issue. So we put forward a hybrid model to solve the problems. This model consists of a deformable centerline and surface reconstruction mechanism based on simplified medial-representation algorithm and nonlinear mass-spring model, and we also proposed the local deformation method so that the accuracy is achieved and real-time requirement is also satisfied. We use a segmented left kidney and blood vessel as the examples in our case study.