SOURCE ANALYSIS AND IMAGING
BESA has a highly interactive and easy-to-use window for source analysis. All relevant information is available at one glance including data, PCA, source waveforms and source localization in 3D head schemes or standardized MRI. You can choose among a variety of state-of-the-art source modeling techniques and head models. 2D and 3D source imaging can be performed with projection onto a standardized MRI.
Source Localization
- Highly interactive graphical user interface for fast hypothesis testing
- Spatio-temporal multiple dipole and regional source modeling
- Image-weighted source fitting
- Tomographic source sensitivity display
- Automated multiple source probe scan (MSPS) for model validation
- (MSPS) for model validation
- Automated source fitting: RAP-MUSIC, Genetic algorithm
- PCA analysis with generation of spatial source components
- Realistic standardized FEM and multi-shell ellipsoidal head models
Source imaging
- 3D imaging of oscillatory activity using the multiple source beamformer (MSBF)
- Distributed volume images: LORETA, sLORETA, swLORETA, LAURA, SSLOFO
- Iterative and user-defined 3D imaging
- Minimum norm images based on the individual brain surface
- 3D movie of maps and dipoles using source waveforms
- Source activity projected onto standardized or individual MRI
Source import and export
- Direct transfer of source models between subjects and conditions
- Export of source models and source waveforms in ASCII
- Creation of source montages
- Coordinate systems: Talairach / Head / Device / Unit Sphere
- Batch commands for many source analysis functions
3D EEG/MEG Imaging
BESA features several 3D imaging tools. Multiple Source Beamformer (MSBF) image of a visual evoked brain response.
Source analysis
Source waveforms separate the activities in auditory, visual and motor cortex, SMA, & cerebellum in a reaction time experiment.