Left Ventricle Cardiovascular Simulation Using Chronologically Sequential Ultra Sound Images
Cardiovascular diseases are major cause of death in the world.Computational fluid dynamics has been used to obtain better understanding of cardiovascular motion from hemodynamic perspective including investigation of the diseases.However,cardiac motion is a mixture of contraction,expansion and twisting motion and mathematical modeling is considered to be challenging.Therefore,cardiovascular flow in left ventricle was simulated based upon chronologically sequential ultra sound images using combination of computational fluid dynamics and an optical flow algorithm.In most cardiovascular computational simulation,only contraction and expansion are assigned to the geometry.However,various attempt has been made to detect twisting motion using optical flow.Thus,implementation of it to the simulation is considered to be an approach to more realistic model.To achieve,image based flow simulation,the source images were polynomially interpolated between chronological frames.From the interpolated images mask images,binary images to track and segment fluid / solid sections,were created.Next,using optical flow algorithm,heart wall movement velocity was calculated based on pixel luminosity on interpolated images.Then the calculated velocity was applied to wall boundary condition to initiate flow calculation.For the fluid calculation part,Navier- Stokes equation was solved assuming Newtonian fluid.For flow calculation algorithm Highly Simplified Maker and Cell method was used with second order spatial and first order time discretization.
Cardiovascular Simulation Medical Image Optical Flow
Yosuke Otsuki Akihiro Kurita Teruo Matsuzawa
School of Information Science, Japan Advanced Institute of Science and Technology, Nomi, Japan Department of Hygiene and Public Health, Osaka Medical College, Osaka, Japan Research Center for Advanced Computing Infrastructure, Japan Advanced Institute of Science and Techn
国际会议
World Congress on Medical Physics and Biomedical Engineering (2012年医学物理及生物医学工程国际会议(IFMBE))
北京
英文
2095-2098
2012-05-26（万方平台首次上网日期，不代表论文的发表时间）