1. Department of Radiological Sciences, Nuclear Medicine Service, Fondazione Istituto G. GiglioContrada Pietrapollastra‐Pisciotto 90015 Cefalù Italy
2. Department of Mathematics and Computer ScienceUniversity of Catania Viale Andrea Doria 6 95125 Catania Italy
3. Institute of Molecular Bioimaging and PhysiologyNational Research Council (IBFM‐CNR) Cefalù Italy
4. U.O.C. Neurologia, Fondazione IstitutoG. GiglioContrada Pietrapollastra‐Pisciotto 90015 Cefalù Italy
5. University of Palermo Palermo Italy
6. Department of Radiological Sciences, Unit of Radiology, Fondazione Istituto G. GiglioContrada Pietrapollastra‐Pisciotto 90015 Cefalù Italy
7. Department of Computer ScienceUniversity of Verona Strada le Grazie 15 37134 Verona Italy
8. Department of Biomedicine and Clinical NeuroscienceUniversity of Palermo Palermo Italy