EMSE

When used together with Polhemus™ digitizing hardware, LOCATOR allows you to measure accurately electrode locations an external head shape in 3 dimensions. These data may then be used for MRI coregistration and more accurate source estimation. LOCATOR currently supports three Polhemus products: ISOTRAK, FASTRAK, and PATRIOT.

The EMSE Suite DATA EDITOR module may be used as a standalone program to view, analyze, filter, and transform EEG and MEG time series data, and to select intervals or events for further analyses, including event-related potentials, power spectral densities, and time-frequency analysis. DATA EDITOR includes tools for automation, signal processing, spatial component analysis, topographic mapping, and a powerful framework for statistical nonparametric mapping.

EMSE Suite SOURCE ESTIMATOR module may be used for discrete or distributed dipole source analysis from EEG or MEG data which has been provided by the DATA EDITOR module. Three shell spherical models or realistic head models (using data from the IMAGE PROCESSOR module) may be used for field calculations. 3D source estimates may be displayed in VISUALIZER for rendering with surfaces or in MR VIEWER with MRI overlay.

MR VIEWER displays magnetic resonance and other images, with specialized features designed for the overlay of electromagnetic source estimation and other functional imaging data. Seeded dipoles may be obtained (e.g. from fMRI data) for use with SOURCE ESTIMATOR

Starting with a volumetric dataset from the MR VIEWER base module, IMAGE PROCESSOR tools support segmentation, boundary mesh generation, and cortical unfolding. The output may be made available to VISUALIZER for 3D rendering, or to SOURCE ESTIMATOR for realistic headshape modeling and cortical surface restriction.

Use VISUALIZER to obtain and view 3D rendered images, combining data from several modalities, including topographic mapping, MRI data and electromagnetic source analysis.