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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

  Background COV (26.52 ml)
Time (min) OSEM β750
1.0 0.186 0.095
2.5 0.119 0.059
5.0 0.084 0.041
10 0.059 0.028
20 0.043 0.021