Study on Deformation Technology of Virtual Surgery Simulator Based on Liver Puncture

Abstract

With the development of robotics and virtual reality technology, virtual surgery simulator has become the most effective way of training doctors, in which soft tissue deformation technology is a key techniques of virtual surgery simulator. The combination of deformation modeling technique and force feedback device realizes the visual and force perception interaction in virtual surgery. The traditional method of mass spring modeling is simple, but the precision is poor. The dynamic modeling method based on position has high efficiency and low accuracy. In this paper, a soft tissue deformation modeling method combining mass spring method and position-based dynamics is proposed, which based on liver puncture surgery, reflects the nonlinear viscoelastic properties of liver soft tissue. The algorithm is simple in calculation, good in real-time and refresh rate is also improved.