1. Departments of Medical Physics and Neurosurgery, Royal Hallamshire Hospital, Sheffield, UK
2. Academic Unit of Medical Physics, School of Medicine and Biomedical Sciences, University of Sheffield, Sheffield, UK
3. Department of Neuroradiology, Royal Hallamshire Hospital, Sheffield, UK
4. NEC Laboratories Europe, NEC Europe Ltd., 53757 St. Augustin, Germany
5. Clinic of Neurosurgery, Department of Clinical Neurosciences, Geneva University Hospital, 1211 Geneva, Switzerland
6. Biomedicine Communication Technologies Department, Center for Computational Imaging & Simulation Technologies, Pompeu Fabra University, Barcelona, Spain
7. Department of Neuroradiology, Institute of Radiology, University Hospital Basel, Petersgraben, Basel, Switzerland
8. Department of Neurosurgery, Royal Hallamshire Hospital, Sheffield, UK