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Computer Science Department Events

There will be a Colloquium on Friday, April 19th at 10:30 AM by Joshua Levine.

FRIDAY APRIL 19

E & C S BUILDING AUDITORIUM (1ST FLOOR)

TIME: 10:30 (DONUTS) 10:40 (TALK)

Title: Meshing Biomedical Data using Cleaver

Speaker: Joshua Levine, Clemson University

Abstract:

This talk will cover new meshing technologies recently developed with biomedical applications in mind. In this setting, the domain of interest is specified as segmented 3D images, where anatomical structures have been described by various material labels. Downstream finite-element applications require high quality meshes which conform to the complex, non-manifold surfaces that bound the volumetric regions between segments.

Specifically, I will focus on results using our most recent software tool: Cleaver. This tool fills a domain with a background body-centered cubic (BCC) lattice, and then through subdivision and localized warping, produces tetrahedral meshes with bounded dihedral angles. Cleaver is open source (available for download at http://www.sci.utah.edu/software/cleaver.html) and has the capability to produce high quality conforming meshes with millions of elements in seconds.

In addition, I will briefly discuss our recent results which compare the effects of boundary conforming vs. non-conforming tetrahedral meshes for cardiac bioelectric field modeling. As this community is still relatively new to applying FEM techniques, many open questions remain as to how best to design meshes for their simulations. We identify three commonly-used approaches to construct tetrahedral meshes for this domain, relying on (1) Delaunay-based schemes, (2) variational systems, and (3) stencil-based techniques which adapt to a background lattice. We provide experimental results with the goal of quantitative comparisons of each approach.

This work is joint with researchers at the University of Utah: Jonathan R. Bronson, Darrell J. Swenson, Rob S. MacLeod, and Ross T. Whitaker.

Bio:

Joshua A. Levine is an assistant professor at Clemson University's Visual Computing division in the School of Computing. His research interests include geometric modeling, visualization, mesh generation, medical imaging, and computational geometry. Levine has a PhD in computer science from The Ohio State University and recently completed a postdoc at the University of Utah's Scientific Computing and Imaging Institute. Contact him at http://people.cs.clemson.edu/~levinej/ and levinej@clemson.edu.