Comput Math Methods Med - Solid dynamic models for analysis of stress and strain in human hearts.

Tópicos

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Resumo

This paper proposes a solid model based on four-dimensional trivariate B-spline for strain and stress analysis of ventricular myocardium. With a series of processing steps in the four-dimensional medical images, the feature points of ventricular inner and outer wall are obtained. A B-spline surface is then used to build the dynamic deformation model of the myocardial walls. With such a surface model, a hexahedron control mesh can be constructed by sweeping the cloud data, and the ventricular solid model is built by fitting the trivariate B-spline parameters. Based on these models, a method of isogeometric analysis can be applied to calculate the stress and strain continuously distributed in the ventricle. The model is represented smoothly in the cylindrical coordinate system and is easy to measure myocardium dynamics for finding abnormal motion. Experiments are carried out for comparing the stress and strain distribution. It is found that the solid model can determine ventricular dynamics which can well reflect the deformation distribution in the heart and imply early clues of cardiac diseases.

Resumo Limpo

paper propos solid model base fourdimension trivari bspline strain stress analysi ventricular myocardium seri process step fourdimension medic imag featur point ventricular inner outer wall obtain bspline surfac use build dynam deform model myocardi wall surfac model hexahedron control mesh can construct sweep cloud data ventricular solid model built fit trivari bspline paramet base model method isogeometr analysi can appli calcul stress strain continu distribut ventricl model repres smooth cylindr coordin system easi measur myocardium dynam find abnorm motion experi carri compar stress strain distribut found solid model can determin ventricular dynam can well reflect deform distribut heart impli earli clue cardiac diseas

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