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2008.64: Simple FEMs aren’t as good as we thought: experiences developing EIDORS v3.3

2008.64: Andy Adler, Andrea Borsic, Nick Polydorides and William R.B. Lionheart (2008) Simple FEMs aren’t as good as we thought: experiences developing EIDORS v3.3. In: 9th EIT conference 2008, 16-18th June 2008, Dartmouth College, New Hampshire.

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Official URL: http://engineering.dartmouth.edu/eit2008/EIT_Conference_2008.pdf

Abstract

In this paper, we 1: announce EIDORS version 3.3, and clarify the new features and changes to the software. Brie y, the new version includes: a) interfaces to FEM generation (distmesh, netgen) and dual model solvers, b) new algorithms (total varia- tion, electrode movement solver, temporal solvers), c) a data repository with in vivo and simulated data and models, d) faster algorithms with better caching, and e) improved graphics and extensive tutorials. 2: we review the use of dual models in EIT, and the architecture to support their use in EIDORS. 3: we discuss accuracy limitations to the single-order tetrahedral nite element models that are used in much EIT research. We recommend that models be used of at least 104 elements (for 2D FEMs) and 106 elements (for 3D FEMs). FEM accuracy may be partially addressed using dual model solvers, for which EIDORS v3.3 provides support.

Item Type:Conference or Workshop Item (Paper)
Uncontrolled Keywords:EIT, Finite Element Method, accuracy
Subjects:PACS 2003 > 87 Biological and medical physics
MIMS number:2008.64
Deposited By:Prof WRB Lionheart
Deposited On:26 June 2008

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