Hi all, please find attached the paper which I'm going to present in the JC on next monday. Kind regards Marcel -- Marcel Straub, M.Sc. Physics PhD Student Physics of Molecular Imaging Department of Experimental Molecular Imaging (ExMI) Medical Faculty RWTH-Aachen University MTZ, Pauwelsstraße 19 52074 Aachen Germany Tel.: +49 (0) 241 80 85186 Fax: +49 (0) 241 80 3380116 Mobile: +49 (0) 174 1472660 Mail: mstraub@ukaachen.de http://pmi.rwth-aachen.de