Fig. 8From: Algorithms for joint activity–attenuation estimation from positron emission tomography scatterComputational complexity: run times per iteration of each algorithm using the fully populated phantom, with NE=4 and a Nj=9×9, as a function of Nd from 16 to 128, b Nd=32, as a function of Nj between 4×4 and 16×16Back to article page