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The present study aims to accurately estimate the in vivo brain-to-skull conductivity ratio by means of cortical imaging technique. Simultaneous extra- and intra-cranial potential recordings induced by subdural current stimulation were analyzed to get the estimation.The effective brain-to-skull conductivity ratio was estimated in vivo for 5 epilepsy patients. The estimation was performed using multi-channel...
Cortical imaging technique (CIT) is an effective spatial enhancement approach to noninvasively image dynamic brain activity with high spatial resolution. The accuracy of forward problem in CIT has an importance on the accuracy of estimated cortical potentials. In this paper, we investigate finite-element-algorithms relating the cortical potentials to the scalp potentials. The numerical accuracy of...
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