Neuromagnetic source localization using 64 channel SQUID system and MRI

This paper describes a high-resolution biomagnetic inverse problem using 64 channel SQUID system and MRI. If a head shape is approximated by a sphere, Geselowitz's equation to estimate the biomagnetic field can be simplified. After corresponding the coordinate of SQUID system to the coordinate...

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Bibliographic Details
Main Authors: Mino, Kazuhiro, Masakiyo, Fumiaki, Niki, Noboru, Nishitani, Hiromu, Tamura, Itsuro
Format: Conference Proceeding
Language:English
Online Access:Get full text
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Summary:This paper describes a high-resolution biomagnetic inverse problem using 64 channel SQUID system and MRI. If a head shape is approximated by a sphere, Geselowitz's equation to estimate the biomagnetic field can be simplified. After corresponding the coordinate of SQUID system to the coordinate of MRI, a sphere model and search space are extracted from the MRI data, and the current sources are localized using the improved simplex method. Each current dipole location is combined with the anatomical MRI data.