a kinematic approach for efficient and robust simulation of the cardiac beating motion运动学方法的高效和健壮的仿真运动心脏跳动.pdfVIP

A Kinematic Approach for Efficient and Robust Simulation of the Cardiac Beating Motion 1 2 3 3 4 1 Takashi Ijiri *, Takashi Ashihara , Nobuyuki Umetani , Takeo Igarashi , Ryo Haraguchi , Hideo Yokota , Kazuo Nakazawa4 1 Bio-research Infrastructure Construction Team, RIKEN, Wako, Japan, 2 Department of Cardiovascular and Respiratory Medicine, Heart Rhythm Center, Shiga University of Medical Science, Otsu, Japan, 3 Department of Computer Science, The University of Tokyo, Tokyo, Japan, 4 Laboratory of Biomedical Science and Information Management, National Cerebral and Cardiovascular Center Research Institute, Suita, Japan Abstract Computer simulation techniques for cardiac beating motions potentially have many applications and a broad audience. However, most existing methods require enormous computational costs and often show unstable behavior for extreme parameter sets, which interrupts smooth simulation study and make it difficult to apply them to interactive applications. To address this issue, we present an efficient and robust framework for simulating the cardiac beating motion. The global cardiac motion is generated by the accumulation of local myocardial fiber contractions. We compute such local-to-global deformations using a kinematic approach; we divide a heart mesh model into overlapping local regions, contract them independently according to fiber orientation, and compute a global shape that satisfies contracted shapes of all local regions as much as possible. A comparison between our method and a physics-based method showed that our method can generate motion very close to that of a physics-based simulation. Our kinematic method has high