1 Department of Medicine (DMED), Institute of Radiology, University of Udine, Udine, Italy. rossano.girometti@uniud.it.
2 University Hospital S. Maria Della Misericordia, Azienda Sanitaria-Universitaria Friuli Centrale (ASUFC), P.Le S. Maria Della Misericordia, 15 - 33100, Udine, Italy. rossano.girometti@uniud.it.
3 Department of Radiology, University College London Hospital NHS Foundation Trust, London, UK.
4 Division of Surgery & Interventional Science, University College London, London, UK.