“…For these purposes, functional imaging with fluorine-18 fluorodeoxyglucose (FDG) positron emission tomography (PET) can reveal decisive metabolic or functional tissue parameters and is more accurate than conventional radiological imaging techniques for restaging after chemotherapy (Jerusalem et al, 1999(Jerusalem et al, , 2001Zinzani et al, 1999a, b;Kostakoglu and Goldsmith, 2000;Dittmann et al, 2001). Several groups, including our own, have evaluated the efficiency of PET for restaging patients after completed therapy (Cremerius et al, 1998(Cremerius et al, , 2001De Wit et al, 2001;Naumann et al, 2001;Spaepen et al, 2001a, b;Weihrauch et al, 2001Weihrauch et al, , 2003Zinzani et al, 2002;Fihnont et al, 2003).…”