1. INSERM, U1099; Rennes France
2. Université de Rennes 1, LTSI; Rennes France
3. Department of Radiotherapy; Centre Eugène Marquis; Rennes France
4. Department of Urology; Centre Hospitalier Universitaire Pontchaillou; Rennes France
5. Department of Radiology; Centre Eugène Marquis; Rennes France
6. Department of Radiology; Centre Hospitalier Universitaire Pontchaillou; Rennes France
7. LaTIM, INSERM UMR 1101, University of Brest; France