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C. Lamm, C. Windischberger, U. Leodolter, E. Moser, H. Bauer. Co-registration of EEG and MRI data using matching of spline interpolated and MRI-segmented reconstructions of the scalp surface. Brain Topogr, 14(2):93-100, 2001.


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Accurate co-registration of MRI and EEG data is indispensable for the correct interpretation of EEG maps or source localizations in relation to brain anatomy derived from MRI. In this study, a method for the co-registration of EEG and MRI data is presented. The method consists of an iterative matching of EEG-electrode based reconstructions of the scalp surface to scalp-segmented MRIs. EEG-electrode based surface reconstruction is achieved via spline interpolation of individually digitized 3D-electrode coordinates. In contrast to other approaches, neither fiducial determination nor any additional provisions (such as bite bars, other co-registration devices or head shape digitization) are required, and co-registration errors associated with inaccurate fiducial determination are avoided. The accuracy of the method was estimated by calculating the root-mean-square (RMS) deviation of spline interpolated and MRI-segmented surface reconstructions in 20 subjects. In addition, the distance between co-registered and genuine electrode coordinates was assessed via a simulation study, in which surface reconstruction was based on virtual electrodes determined on the scalp surface of a high-resolution MRI data set. The mean RMS deviation of surface reconstructions was 2.43 mm, and the maximal distance between any two matched surface points was 5.06 mm. The simulated co-registration revealed a mean deviation of genuine and co-registered electrode coordinates of 0.61 mm. It is concluded that surface matching using spline interpolated reconstructions of scalp surfaces is a precise and highly practicable method to co-register EEG and MRI data


[ Adult ] [ Brain/*anatomy & histology/*physiology ] [ Brain mapping/*methods ] [ *electroencephalography ] [ Human ] [ *image processing ] [ Computer-assisted ] [ Imaging ] [ Three-dimensional ] [ *magnetic resonance imaging ] [ Scalp/*anatomy & histology/*physiology ] [ Skull/anatomy & histology ] [ Support ] [ Non-u.s. gov't ]


C. Lamm
C. Windischberger
U. Leodolter
E. Moser
H. Bauer

BibTex Reference

   Author = {Lamm, C. and Windischberger, C. and Leodolter, U. and Moser, E. and Bauer, H.},
   Title = {Co-registration of {EEG} and {MRI} data using matching of spline interpolated and {MRI}-segmented reconstructions of the scalp surface},
   Journal = {Brain Topogr},
   Volume = {14},
   Number = {2},
   Pages = {93--100},
   Year = {2001}

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