Figure 3.

Sagittal PET (A,C,E,G) and fused PET/CT images (B,D,F,H) of a PCa patient with local recurrence and bone metastases (same patient as in Figure 2). The PET images were reconstructed with 1 and 0.5 min per bed position using OSEM (3 iterations/16 subsets, and a 5-mm gaussian postprocessing filter) and BSREM with β-values 1200 (top) and 1600 (bottom). BSREM: block-sequential regularized expectation maximization; OSEM: ordered subsets expectation maximization.