Abstract
The analysis of cognitive processes in man usually involves multiple examination modalities which map different aspects of the brain. Among these procedures, at least one modality yielding anatomical information (i.e. MRI*) besidesone or more functional modalities (fMRI, PET, SPECT, EEG, MEG) are involved.Because these different examination methods yield complimentary informationabout the anatomical, metabolical and neurophysiological state of the brain, acombined data evaluation is highly desirable and will lead to results not achievable within one examination domain.Such studies are of importance in research (cognitive neuroscience) and withan emphasis on pathological processes in clinical disciplines like neurology,neurosurgery and psychiatry.We have developed a program package for the handling of image datasets(MRI, PET, SPECT, CCT) and signal datasets (EEG, MEG) which allows a combined analysis of these data sources in a fourdimensional coordinate space (x, y,z, and time).
