Fig. 4From: Noise reduction using a Bayesian penalized-likelihood reconstruction algorithm on a time-of-flight PET-CT scannerComparison in terms of CNR as a function of sphere size between (top) TOF-OSEM (3 iterations, 16 subsets, post-filter 5.0 mm and PSF) and (Bottom) BSREM with β = 750 (including TOF and PSF) for different count statistics and contrast ratios. Note that the maximum scale value showed in the graphs are different between both reconstructionsBack to article page