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Left: difference relative to the contrast recovery of TOF-OSEM (3 iterations, 16 subsets, post-filter 5.0 mm and PSF) at high count statistics (20 min) for each sphere size as a function of the regularization parameters. Right: comparison of the contrast recovery as a function of the sphere size of BSREM with β = 750 (including TOF and PSF) and OSEM for 20 min acquisition. All plots correspond to a contrast ratio of 8:1
