Analysis of FET-PET imaging for target volume definition in patients with gliomas treated with conformal radiotherapy - Rieken, Stefan; Habermehl, Daniel; Giesel, Frederik L.; Burger, Ute; Rief, Harald; Welzel, Thomas; Haberkorn, Uwe; Debus, Jürgen; Combs, Stephanie (Radiotherapy and oncology, 2013)