Fig. 5From: Algorithms for joint activity–attenuation estimation from positron emission tomography scatterEstimated 18×18-voxel ρ-maps at rat scale (see Fig. 6c, right) and their NMSEs after 50 iterations of four S2A reconstruction algorithms, respectively: a MLGA, MLEM-like step size, b MLEM-OSL, c MLGA, constant step size., d MLGA, scaled step sizeBack to article page