Generating accurate finite element meshes for the forward model of the human head in EIT

Tizzard, Andrew and Horesh, Lior and Yerworth, Rebecca J. and Holder, David S. and Bayford, Richard (2005) Generating accurate finite element meshes for the forward model of the human head in EIT. Physiological Measurement, 26 (2). S251-S262. ISSN 0967-3334

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Official URL: http://dx.doi.org/10.1088/0967-3334/26/2/024

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Abstract

The use of realistic anatomy in the model used for image reconstruction in EIT of brain function appears to confer significant improvements compared to geometric shapes such as a sphere. Accurate model geometry may be achieved by numerical models based on magnetic resonance images (MRIs) of the head, and this group has elected to use finite element meshing (FEM) as it enables detailed internal anatomy to be modelled and has the capability to incorporate information about tissue anisotropy. In this paper a method for generating accurate FEMs of the human head is presented where MRI images are manually segmented using custom adaptation of industry standard commercial design software packages. This is illustrated with example surface models and meshes from adult epilepsy patients, a neonatal baby and a phantom latex tank incorporating a real skull. Mesh quality is assessed in terms of element stretch and hence distortion.

Item Type:Article
Research Areas:Middlesex University Schools and Centres > School of Science and Technology > Natural Sciences
Middlesex University Schools and Centres > School of Science and Technology > Natural Sciences > Biophysics and Bioengineering group
Citations on ISI Web of Science:29
ID Code:9319
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Deposited On:23 Aug 2012 06:55
Last Modified:08 Oct 2014 10:52

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