Based On The Finite Element Method The Surface Of The Heart Motion Modeling Study

Three-dimensional (3D) cardiac modeling is an important area of research in medical imaging analysis. The parameters of cardiac structure are extracted using the cardiac sequence image obtained by the current medical imaging techniques, and it is an important basis of evaluating the cardiac function. But myocardium is non-rigid, and it is possibly deformed in the periodic pulsation including displacement, revolving, diastole and systole and so on. Therefore, the cardiac shape and motion are an unavoidable factor having an effect on its related parameter estimation. In this paper, using the extracted discrete three-dimensional date points of the cardiac surface from CT images, the cardiac surface motion model is established according to the basic principle of finite element method, and it lays the foundation for the visualization of cardiac diagnosing and treating.In this paper, the basic theory and techniques of the finite element modeling method are researched. The method of the finite element cardiac modeling of the rapid generation of tetrahedral mesh is proposed for the cardiac surface restoration and reconstruction, and the finite element equation of cardiac surface motion is constructed using the finite element method and the biological mechanics principle. The triangle mesh of cardiac surface is rapidly built into a group of non-overlap tetrahedral mesh cell in order to satisfy the needs of calculating the vector of element stress and nodes displacement of the finite element method. Commencing on the 3D surface restoration, strain analysis and 3D motion modeling, the stress distribution and deformation of the cardiac t during systole are analyzed. The calculation of nodes displacement corresponding element is implemented by combining the non-rigid motion estimation with various restrictive conditions of deformable model. Then the cardiac surface biology mechanical model is established, and it effectively simulates dynamic deformation of the cardiac. The simulation testing indicates that the cardiac surface motion model of the finite element method can intuitively and effectively reflect the strain distribution and deformation of the cardiac surface during systole and diastole.