[1] Tech Univ Munich, Klinikum Rechts Isar, Dept Neurosurg, Ismaninger Str 22, D-81675 Munich, Germany
[2] Tech Univ Munich, Klinikum Rechts Isar, TUM Neuroimaging Ctr, D-81675 Munich, Germany
[3] Tech Univ Munich, Klinikum Rechts Isar, Dept Radiol, Neuroradiol Sect, D-81675 Munich, Germany