Pierre Yves Marcy1, Gérard Guiffant2, Jacques Merckx2, Alexis Lacout3. 1. Radiodiagnostics and Interventional Radiology Department, PolyClinique les Fleurs, Ollioules - France. 2. Laboratoire MSC Paris Diderot, Paris - France. 3. Department of Radiology, CMC, Aurillac - France.