The present invention recognises and eliminates from a biomagnetic measurementsignal interferences whose source is disposed in the direct vicinity of anobject being measured. The invention utilises the SSS method that can be usedto separate from one another the signals associated with the internal andexternal sources of a set of measurement sensors by calculating two seriesdevelopments. The sources to be examined in the invention and disposed in theso-called intermediate space produce a component to both of the developments,and can, therefore, be detected by means of an analysis to be performed in atime domain. This division into components can be made using the PrincipalComponent Analysis (PCA), the Independent Component Analysis (ICA) or theSingular Value Decomposition. Finally, the clarified interferences in theintermediate space can be eliminated from the measured signal using, forexample, the linear algebraic orthogonal projection.
