Computational Science - ICCS 2005, 5th International Conference

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Research Title: 
Computational Modeling of Human Head Conductivity
Authors: 
Adnan Salman
Authors: 
Sergei Turovets
Authors: 
Allen D. Malony
Authors: 
Jeff Eriksen
Authors: 
Don M Tucker
Country: 
USA
Date: 
Sun, 2005-05-22
Research Abstract: 

The computational environment for estimation of unknown regional electrical conductivities of the human head, based on reali stic geometry from seg- mented MRI up to2563 resolution, is described. A finite difference alternating d i- rection implicit (ADI) algorithm, parallelized using OpenMP, is used to solve the forward problem describing the electrical field distributi on throughout the head given known electrical sources. A simplex search in the multi-dimensional para- meter space of tissue conductivities is conducted in parall el using a distributed system of heterogeneous computational resources. The theoretical and computa- tional formulation of the problem is presented. Results from test studies are pro- vided, comparing retrieved conductivities to known solutions from simulation. Performance statistics are also given showing both the scaling of the forward problem and the performance dynamics of the distributed search.