Hallo Gate-Community, Has anyone been already simulated Ge-68 istope source in Gate?. Thanks for your help, Cheers, Bassim -- Bassim Aklan, MSc. Institute of Medical Physics - Section for MR Imaging University of Erlangen-Nuremberg Henkestr. 91 91052 Erlangen, Germany phone: +49-(0)9131/85-25545 bassim.aklan at imp.uni-erlangen.de