[1] Mater Olbia Hosp, Dept Neurosurg, Olbia, Italy
[2] Catholic Univ, Inst Neurosurg, Fdn Policlin Univ A Gemelli IRCCS, Rome, Italy
[3] Univ Hosp Udine, Head Neck & NeuroSci Dept, Neurosurg Unit, Udine, Italy
[4] Fdn Policlin Univ Agostino Gemelli IRCS, Adv Radiodiagnost Ctr, Unita Operat Semplice Dipartimentale UOSD Neuradi, Rome, Italy
[5] Azienda Sanit Univ Friuli Cent ASUFC Santa Maria, Dept Neuroradiol, Udine, Italy
[6] Fdn Policlin Univ Agostino Gemelli IRCSS, Dept Radiol Radiat Oncol & Hematol, Rome, Italy
[7] Mater Olbia Hosp, Med Phys Unit, Olbia, Italy
[8] Fdn Policlin Univ Agostino Gemelli IRCSS, Inst Neurosurg, Rome, Italy