Document Detail


Tetrahedral and polyhedral mesh evaluation for cerebral hemodynamic simulation--a comparison.
MedLine Citation:
PMID:  19964600     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Computational fluid dynamic (CFD) based on patient-specific medical imaging data has found widespread use for visualizing and quantifying hemodynamics in cerebrovascular disease such as cerebral aneurysms or stenotic vessels. This paper focuses on optimizing mesh parameters for CFD simulation of cerebral aneurysms. Valid blood flow simulations strongly depend on the mesh quality. Meshes with a coarse spatial resolution may lead to an inaccurate flow pattern. Meshes with a large number of elements will result in unnecessarily high computation time which is undesirable should CFD be used for planning in the interventional setting. Most CFD simulations reported for these vascular pathologies have used tetrahedral meshes. We illustrate the use of polyhedral volume elements in comparison to tetrahedral meshing on two different geometries, a sidewall aneurysm of the internal carotid artery and a basilar bifurcation aneurysm. The spatial mesh resolution ranges between 5,119 and 228,118 volume elements. The evaluation of the different meshes was based on the wall shear stress previously identified as a one possible parameter for assessing aneurysm growth. Polyhedral meshes showed better accuracy, lower memory demand, shorter computational speed and faster convergence behavior (on average 369 iterations less).
Authors:
Martin Spiegel; Thomas Redel; Y Zhang; Tobias Struffert; Joachim Hornegger; Robert G Grossman; Arnd Doerfler; Christof Karmonik
Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Conference proceedings : ... Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual Conference     Volume:  2009     ISSN:  1557-170X     ISO Abbreviation:  Conf Proc IEEE Eng Med Biol Soc     Publication Date:  2009  
Date Detail:
Created Date:  2009-12-07     Completed Date:  2010-03-16     Revised Date:  2014-08-21    
Medline Journal Info:
Nlm Unique ID:  101243413     Medline TA:  Conf Proc IEEE Eng Med Biol Soc     Country:  United States    
Other Details:
Languages:  eng     Pagination:  2787-90     Citation Subset:  IM    
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MeSH Terms
Descriptor/Qualifier:
Angiography / instrumentation,  methods*
Automation
Blood Flow Velocity
Carotid Arteries / physiopathology
Cerebrovascular Circulation*
Computer Simulation
Computers
Constriction, Pathologic / diagnosis,  physiopathology
Equipment Design
Hemodynamics
Humans
Imaging, Three-Dimensional
Intracranial Aneurysm / diagnosis,  physiopathology
Models, Theoretical
Reproducibility of Results

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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