Fig. 3

Effect of varying the last two time points (time point of the planar image followed by the SPECT/CT: t_{planar + SPECT}) from the optimal schedules for the hybrid planar/SPECT method (Table 1) on the root-mean-square error (RMSE) values of the kidneys and the tumours. The optimal schedules and the investigated alternatives of the last two time points are marked with red crosses and white circles, respectively. Contour lines with RMSE = 10 % for the kidneys (black line) and with RMSE = 10%, 15% (black dashed line) for the tumours are highlighted. The results base on the simulations using a fraction of systematic error to the total error of f_syst = 50%