[1] Univ Bologna, Sant Orsola Malpighi Hosp, Dept Specialized Diagnost & Expt Med, Via G.Massarenti 9, I-40138 Bologna, Italy
[2] UOC Neuroradiol, IRCCS Inst Neurol Sci Bologna, Rizzoli Inst, Diagnost & Intervent Radiol, Bologna, Italy
[3] Univ Bologna, Bellaria Hosp, IRCCS Inst Neurol Sci, Dept Neurosci,Neuroradiol Unit, Bologna, Italy
[4] Univ Bologna, Bellaria Hosp, IRCCS Inst Neurol Sci, Dept Neurosci,Neurosurg Unit, Bologna, Italy
[5] Maggiore Hosp, Dept Oncol, Anat & Histol Pathol & Cytodiag, Bologna, Italy