Abstract
Introduction: Head modeling is an important part of EEG source localization and optimization in TES allowing to see how much current is delivered to the brain target. Using MRI one can routinely create anatomically accurate individual head models in terms of geometrical precision. However, estimation of subject-specific electrical conductivity values of the head tissues is still a challenge, so usually default values from the literature are used. Bounded Electrical Impedance Tomography (bEIT) allows estimating the head tissue conductivities non-invasively and individually (Fernandez-Corazza et al., 2018. DOI: 10.1109/TBME.2017.2777143) and thus to complement the subject-specific geometry by individual conductivities. In this paper, we estimate the neurostimulation dose differences resulting from using the default literature conductivity values versus calibrated individualized head tissue conductivities.
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