title: 3D localization of surface 10-20 EEG electrodes on high resolution anatomical MR images.
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.
authors.affiliation: Department of Radiology, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02115, USA.
authors.forename: S S
authors.initials: SS
authors.lastname: Yoo
authors.forename: C R
authors.initials: CR
authors.lastname: Guttmann
authors.forename: J R
authors.initials: JR
authors.lastname: Ives
authors.forename: L P
authors.initials: LP
authors.lastname: Panych
authors.forename: R
authors.initials: R
authors.lastname: Kikinis
authors.forename: D L
authors.initials: DL
authors.lastname: Schomer
authors.forename: F A
authors.initials: FA
authors.lastname: Jolesz
mesh_terms: D001921:Brain / Q000502:physiology*; D004566:Electrodes; D004569:Electroencephalography / Q000379:methods*; D006801:Humans; D007091:Image Processing, Computer-Assisted; D008279:Magnetic Resonance Imaging