3D Model Reconstruction and Surgical Simulation of Human Abdominal Anatomy

Deformation, cutting and collision simulations of the human abdominal structure containing multiple organs such as liver, stomach, colon and gallbladder were realized through a method that converts traditional polygonal models to volumetric models. 3D model reconstructions of the organs inside the abdominal cavity were first carried out based on the physiological abdominal anatomy. Then the relative positions between the 3D models were determined, and appropriate boundary constraint conditions were set for the 3D models according to physiological positions and suspension conditions of the organs. Next the 3D models were converted to voxel-based volumetric models. Finally biomechanical properties were assigned to the volumetric models and simulations were carried out. Experimental results show that our method can create realistic and appropriate simulation effects of deformation, cutting and collision while maintaining fairly stable simulation frame rates, and can meet the real-time requirements of both visual rendering and haptic feedback even for simulation scenes with multiple organs.