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Spatial resolution results. Shown are the mean profiles (horizontal and vertical) of 10 consecutive transaxial image slices (maximum a posteriori reconstruction) of a line source positioned approximately in the center of the microPET transaxial field of view. Fitted Gaussian functions are superimposed on the data. Full width at half maximum is 1.9 mm for 18F, and 2.6 mm for 124I. The higher amplitude tails for 124I reflect the true-coincidence γ-ray background.
