1 Department of Radiology, Azienda Ospedaliero Universitaria di Cagliari, Cagliari, Italy.
2 Department of Nuclear Medicine, Azienda Ospedaliero Universitaria di Cagliari, Cagliari, Italy.
3 Vascular and Interventional Radiology Unit, Department of Radiological Oncological and Anatomo-Pathological Sciences, Sapienza University of Rome, Rome, Italy.
4 Stroke Monitoring and Diagnostic Division, AtheroPoint™, Roseville, CA, USA.