calib4ge 2.3 © 1997-2003 by Turku PET Centre Calibrates GE Advance images in CTI ECAT 6.3 format to kBq/mL. Corrects also for isotope branching ratio. Note that this program does not remove previous calibration, but just adds to those, and thus file must not be initially calibrated! Usage: calib4ge [-f<Frame(s)>] [-d] <Image> <Calibration file> With option -f the calibration can be applied only to specified 'frames'; this can be used with images reconstructed from parametric sinograms. Independent of this option, all frames are divided by the volume of pixel. With option -d calibration is made directly from calibration factors.