1. “Mario Serio” Department of Experimental and Clinical Biomedical Sciences, University of Florence, Florence, Italy
2. Department of Electrical, Electronic, and Information Engineering “Guglielmo Marconi,” University of Bologna, Bologna, Italy
3. IRCSS Fondazione SDN, Naples, Italy
4. University of Naples Parthenope, Naples, Italy
5. Unit of Medical Physics, Pisa University Hospital “Azienda Ospedaliero-Universitaria Pisana,” Pisa, Italy