ABSTRACT
This paper illustrates the concept of Multimodality in Brain Imaging by giving two examples of multimodal techniques. The first one solves a classical problem of the EEG (Electroencephalogram) Inverse Problem by computing the resistivities of brain, skull and scalp “in vivo” and individually for each subject, thus considerably decreasing the systematic errors associated to the EEG Inverse Problem solution. The second example consists of the co-registration of EEG and fMRI (functional magnetic resonance imaging), a novel technique that consists of recording the EEG inside the MR (magnetic resonance) scanner during the acquisition of the fMRI sequence. It poses several questions of technical and theoretical nature that will be described. Furthermore, the adopted solutions will be explained as well as the consequences the use of this technique has for the future of Brain Imaging.
