Dario Giambelluca1, Fabio Panzuto2, Eliana Giambelluca3, Massimo Midiri4. 1. Section of Radiological Sciences, Di.Bi.Med, University of Palermo, Via del Vespro 127, 90127, Palermo, Italy. dariojambo@hotmail.it. 2. Section of Radiological Sciences, University of Pavia, Viale Camillo Golgi 19, 27100, Pavia, Italy. 3. Department of Physical Medicine and Rehabilitation, University of Pavia, Viale Camillo Golgi 19, 27100, Pavia, Italy. 4. Section of Radiological Sciences, Di.Bi.Med, University of Palermo, Via del Vespro 127, 90127, Palermo, Italy.