Professor de neuroradiologia al departament de Radiologia i Medicina Nuclear de la VU University Medical Centre a Amsterdam, Holanda, i a l’University College of London Institutes of Biomedical Engineering and Neurology, a Londres, Regne Unit. És senior fellow de la International Society for Magnetic Resonance in Medicine (ISMRM) i lidera la unitat d'assajos clínics del Queen Square MS Centre a Londres.
