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Reconstructed images of the central transverse slices for the simulated lesion phantoms with 1 cm (Left) and 0.5 cm (Right) diameter lesions. The water-filled cylinder was 35 cm diameter by 70 cm long and sphere uptake was 3:1 with respect to background. The distribution of 16 spheres in each phantom was at radial distances of 7 and 13 cm.
