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Journal Article

Low resolution conductivity estimation to improve source localization

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Anwander,  Alfred
Methods and Development Unit Cortical Networks and Cognitive Functions, MPI for Human Cognitive and Brain Sciences, Max Planck Society;

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Citation

Lew, S., Wolters, C., Anwander, A., Makeig, S., & MacLeod, R. (2007). Low resolution conductivity estimation to improve source localization. International Congress Series, 1300, 149-152. doi:10.1016/j.ics.2006.12.058.


Cite as: http://hdl.handle.net/11858/00-001M-0000-0010-C4B5-6
Abstract
Bioelectric source localization in the brain is sensitive to geometry and conductivity properties of the different head tissues. We propose a method that individually optimizes a realistically-shaped volume conductor with regard to the conductivities using a simulated annealing optimizer in discrete parameter space. We show that the method is able to simultaneously reconstruct two reference sources and a reference skull:brain conductivity ratio even in the presence of realistic noise. The individually optimized head model can then be used for the analysis of clinical or cognitive data.