BESA 5.2 features a wide range of distributed 3D source images. sSLOFO (standardized shrinking sLORETA FOCUSS) is an iterative distributed source approach. An sLORETA image serves as initial spatial weighting for subsequent iterative standardized minimum applications. In each iteration step, the effective source space is narrowed down to brain regions of high reconstructed activity. This results in much more focal 3D volume images as compared to standard methods like sLORETA, LAURA, and LORETA.
In the figure, an sSLOFO image has been computed for an averaged epileptic spike of a child with benign rolandic epilepsy. A multiple dipole model that has been fitted to the data is superimposed to the image. The image confirms the bilateral epileptic activity in the inferior rolandic regions at the analyzed time sample.