%A %T Numerical Simulation of Human Thoracic Aorta Based on CT Images %0 Journal Article %D 2009 %J Science & Technology Review %R %P 27-31 %V 27 %N 0920 %U {http://www.kjdb.org/CN/abstract/article_649.shtml} %8 2009-10-28 %X In order to provide a theoretical basis for the clinical treatment of thoracic aortic aneurysms, a 3D finite element model of thoracic aortic aneurysm is constructed, including ascending aorta, aortic arch, and descending aorta, with a fusiform aneurysm in descending aorta, together with three large branches (innominate artery, left common carotid artery, and left subclavian artery). Numerical simulations of hemodynamics for this model is carried out. Based on the clinical patient-specific CT data of thoracic aortic aneurysm, image segmentation is carried out by MIMICS 11 and an optimized surface model of thoracic aortic aneurysm is constructed, which is imported into ANSYS ICEM CFD 11.0, where the volume meshes and boundary layer meshes are generated, and CFD analysis is performed. Numerical simulation is performed using a finite volume method. A finite element model for hemodynamics analysis of patient-specific thoracic aortic aneurysm is built. Distribution and changes of streamlines, velocity vector, pressure and wall shear stress are obtained for the patient-specific model. Such models with digital and patient-specific features can be applied to hemodynamic analysis of thoracic aortic aneurysm. Rupture mechanism of thoracic aortic aneurysms in a patient can be analyzed based on this kind of models.