Multiresolution MEG (magnetoencephalography) imaging by adaptive beamformer scanning

There is a tradeoff between the spatial resolution and the speed of beamformer MEG imaging method. For clinical purposes, source localization for large volumes of MEG/EEG data such as epileptic spike data needs to be performed quickly, accurately, and automatically. In an effort to meet these requirements we have developed multiresolution beamformer MEG imaging technique to localize brain electrical activity with high speed and fine resolution. To avoid scanning the areas without activity, the method iteratively refines the grid only in the areas where activity has been detected. The method produces significant savings in processing time. Numerical experiment shows 400 times speed up in comparison with conventional beamformer method.