1. R&D Unit, H.S. Hospital Service SpA, Rome, Italy;
2. Department of Radiology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts, USA;
3. Department of Interventional Oncologic Radiology, General Hospital of Busto Arsizio, Busto Arsizio, Italy;
4. Department of Radiology, San Gerardo Hospital, Monza, Italy;
5. Department of Electronics, Information and Bioengineering, Politecnico di Milano, Milan, Italy;
6. Department of Radiology, Hadassah Hebrew University Medical Centre, Jerusalem, Israel