Jump to : Download | Abstract | Keywords | Contact | BibTex reference | EndNote reference |

LWL+01

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.

Download

Download paper: (link)

Copyright notice:This material is presented to ensure timely dissemination of scholarly and technical work. Copyright and all rights therein are retained by authors or by other copyright holders. All persons copying this information are expected to adhere to the terms and constraints invoked by each author's copyright. These works may not be reposted without the explicit permission of the copyright holder.

Abstract

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

Keywords

[ 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 ]

Contact

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

BibTex Reference

@article{LWL+01,
   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}
}

EndNote Reference [help]

Get EndNote Reference (.ref)