Particle-based Simulation of Blood Flow and Vessel Wall Interactions in Virtual Surgery

摘要

We propose a particle-based solution to simulate the in-teractions between blood flow and vessel wall for virtual surgery. By coupling two particle-based techniques, the smoothed particle hydrodynamics (SPH) and mass-spring model (MSM), we can simulate the blood flow and defor-mation of vessel seamlessly. At the vessel wall, particles are considered as both boundary particles for SPH solver and mass points for the MSM solver. We implement an im-proved repulsive boundary condition to simulate the interac-tions. The computation of blood flow dynamics and vessel wall deformations are performed in an alternating fashion in every time step. To ensure realism, parameters of both SPH and MSM are carefully configured. Experimental re-sults demonstrate the potential of the proposed method in providing real-time and realistic interactions for virtual vas-cular surgery systems.