The use of PET/CT in radiotherapy planning: contribution of deformable registration - Delikgoz Soykut, Ela; Ozsahin, Esat Mahmut; Yukselen Guney, Yildiz; Aytac Arslan, Suheyla; Derinalp Or, Ozlem; Altundag, Muzaffer Bedri; Ugurluer, Gamze; Tsoutsou, Pauletta (Frontiers in Oncology, 2013)