Identification of discrete regions of activity using correlation coefficient scanning of distributed current maps

Biomagnetic measurements of the brain are often analysed in terms of a number of discrete primary generators. In this paper we describe an objective method of identifying the number of approximate location of such generators. The method is based on the matching of an instrument-independent representation of the data with a template whose pattern is characteristic of a localized primary source. The method is shown to be insensitive to severe noise and to be capable of resolving closely spaced generators.