This Acta Neurochirurica supplement distills the accomplishments of the Joint Convention of the Academia Eurasania Nuerochirurgica and the German Academy of Neurosurgery held in Bamberg, Germany from Sept. 1-3 2005. The main focus is "Medical Technologies for Neurosurgery," including: imaging, image processing, robotics, workflow analysis and ethics. Coverage extends from an overview of medical technologies, to robotic-assisted systems in neurosurgical operating rooms, to intraoperative MRI.