Fig. 2

Peak NECR as the source activity decays is investigated for varying detector aFOV and length of the linear source. Results for an initial F18 source activity of 1100 MBq are shown in subfigures A and B, and for 20 MBq initial activity in subfigures C and D. In each case we see an approximately linear improvement in peak NECR with detector aFOV until the point where detector aFOV equals source length, when the improvement begins to plateau.