Table 2 Comparison in terms of background COV between TOF-OSEM (3 iterations, 16 subsets, post-filter 5.0 mm and PSF) and BSREM with β = 750 for a volume of 26.52 ml at different count statistics. All values correspond to a contrast ratio of 8:1

From: Noise reduction using a Bayesian penalized-likelihood reconstruction algorithm on a time-of-flight PET-CT scanner