DEFORMABLE PARAMETRIC MODEL FOR LEFT VENTRICLE WALL MOTION SIMULATION

摘要

In this paper, 3-D left ventricle (LV) shapes extracted from the visual human database (VHD) are animated using Free-Form Deformation (FFD) techniques. The starting 3-D shape is obtained after segmentation of endocardial and epicardial walls from cryogenic sections of the male VHD. From these contours, endocardial and epicardial walls surfaces are reconstructed using Delaunay triangulation. These surfaces are deformed to simulate the dynamical contraction using FFD techniques guided by prior- knowledge about the left ventricle motion. From the resulting 4-D (3-D + time) shapes, mechanical parameters are calculated and compared with results of works previously reported based in Tagged Magnetic Resonance (MR-tagging) images. Results show a plausible evolution of the left ventricle shape during the cardiac cycle.