Fabrizio Cutolo1,2. 1. Department of Information Engineering, University of Pisa, Pisa, Italy. fabrizio.cutolo@endocas.unipi.it. 2. EndoCAS Center, Department of Translational Research and New Technologies in Medicine and Surgery, University of Pisa, Pisa, Italy. fabrizio.cutolo@endocas.unipi.it.