3D localization of surface 10-20 EEG electrodes on high resolution anatomical MR images

Citation:

SS Yoo, CR Guttmann, JR Ives, LP Panych, R Kikinis, DL Schomer, and FA Jolesz. 1997. “3D localization of surface 10-20 EEG electrodes on high resolution anatomical MR images.” Electroencephalogr Clin Neurophysiol, 102, 4, Pp. 335-9.

Abstract:

A method to visualize surface EEG electrodes on conventional high-resolution magnetic resonance (MR) images is presented. Because conventional silver or gold electrodes generate an insignificant artifactual signal signature in MR images, a plastic capsule filled with gadolinium-doped water was designed to mold onto each electrode, thereby outlining the electrode surfaces as a negative imprint on MR images. MR images of the head with capsules affixed clearly demonstrated the location and shape of the electrodes. Selected cranial tissues were identified by using semi-automatic image segmentation to determine their three-dimensional spatial relationship to the electrodes. Such representations could be used as a starting point for more precise EEG source localization modeling applicable to individual patients.