Deformable Volume Object Modeling with a Particle-based System for Medical Applications

In this paper, we describe a general method for reconstruction and animation of volumetric deformable objects. First, the initial data, deened by planar contours, are tted with a closed periodic parametric surface. Then, this rigid model is used as a closed boundary, which is lled in by particles. For this, new particles are progressively generated within the boundary. When a new particle is introduced, there will be an interaction between this particle and all the existing particles. They will collide the boundaries. Then we let the system evolve under physically-based forces, until the particles reach an equilibrium state. We have deened some simple rules for the new particle generation. In the scope of a medical application, we want to simulate the motion and the form alteration of the internal anatomical objects. So we have introduced the necessary tools to handle the dynamic and deformable behavior of cancerous tissues and organs. Our particle system seems adequate to be integrated in a much more complete model of the human body, which could help the physicians during the treatment.