Fig. 6

Contrast (SUV ratios) of BSREM (β = 300–3000, including TOF and PSF) and TOF-OSEM (3 iterations, 16 subsets, post-filter 5.0 mm and PSF) as a function of noise level of a large VOI (⌀, 3.0 cm) placed in normal liver for different acquisition times (10, 5.0, and 2.5 min). Different plots are shown with decreasing lesion volume