Fig. 3
From: Evaluation of Iodine-123 and Iodine-131 SPECT activity quantification: a Monte Carlo study
Normalised counts and \({\text{SD}}_{{{\text{relative}}}}\) as a function of OS-EM updates for spheres with diameters of 1.5 cm, 3.0 cm, 4.5 cm, and 6.0 cm, for a 123I LEHR, b 123I ME and c 131I HE