Source Estimator 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. Source estimates may be output to MR Viewer for MRI overlay.
Use Visualizer to obtain and view 3D rendered images, combining data from several modalities, including topographic mapping, MRI data and electromagnetic source analysis.
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. Image data may be input in raw byte, raw word, ACR/NEMA/DICOM, and several proprietary formats. MR Viewer is the base module for Image Processor and Visualizer.
Data Editor may be used as a standalone program to view, analyze, filter and transform EEG and MEG time series data, and to select an interval for further analysis, including topographic mapping. In addition, the data are directly accessible to Source Estimator for source analysis, and to the Visualizer module for 3D rendering. Data Editor includes signal processing and statistical analysis tools. Data Editor takes input in ASCII format or in native mode from several commercial EEG/MEG systems.
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 head shape modeling and cortical surface restriction.
When used together with Fastrak or Patriot digitizing hardware, Locator allows you to measure accurately landmarks, electrode locations and external head/body shape in 3 dimensions. These data may then be used for coregistration of surface measured potentials with anatomical / functional image data and to improve the precision of mapping and source estimation.