François Cousin1, Laurent Gérard2, Julien Joskin3. 1. Department of Nuclear Medicine and Cancer Imaging, Centre Hospitalier Universitaire de Liège, Avenue de l'Hôpital 1, Liège 4000, Belgium. Electronic address: fcousin@chuliege.be. 2. Department of Imaging, Centre Hospitalier Universitaire de Liège, Avenue de l'Hôpital 1, Liège 4000, Belgium. 3. Department of Imaging, Centre Hospitalier Emile Mayrisch, Esch-sur-Alzette, Luxembourg.