Abstract:
:We describe an approach to construct hexahedral solid NURBS (Non-Uniform Rational B-Splines) meshes for patient-specific vascular geometric models from imaging data for use in isogeometric analysis. First, image processing techniques, such as contrast enhancement, filtering, classification, and segmentation, are used to improve the quality of the input imaging data. Then, lumenal surfaces are extracted by isocontouring the preprocessed data, followed by the extraction of vascular skeleton via Voronoi and Delaunay diagrams. Next, the skeleton-based sweeping method is used to construct hexahedral control meshes. Templates are designed for various branching configurations to decompose the geometry into mapped meshable patches. Each patch is then meshed using one-to-one sweeping techniques, and boundary vertices are projected to the lumenal surface. Finally, hexahedral solid NURBS are constructed and used in isogeometric analysis of blood flow. Piecewise linear hexahedral meshes can also be obtained using this approach. Examples of patient-specific arterial models are presented.
journal_name
Comput Methods Appl Mech Engjournal_title
Computer methods in applied mechanics and engineeringauthors
Zhang Y,Bazilevs Y,Goswami S,Bajaj CL,Hughes TJdoi
10.1016/j.cma.2007.02.009subject
Has Abstractpub_date
2007-05-15 00:00:00pages
2943-2959issue
29-30eissn
0045-7825issn
1879-2138journal_volume
196pub_type
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