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Fig. 1 | EJNMMI Research

Fig. 1

From: Impact of acquisition time and penalizing factor in a block-sequential regularized expectation maximization reconstruction algorithm on a Si-photomultiplier-based PET-CT system for 18F-FDG

Fig. 1

a Noise level for all examined combinations of AT (MBq/kg × min/bed) and β values. All values are normalized to AT of 16 with a β of 300 (reference). The boxplots show the median (thick line in the middle of the boxes) and the first and third quartiles (the top and bottom box lines). The whiskers extend to 1.5 times the height of the box (approx. 95% of the data). Circles are outliers, and stars in the graph indicate extreme outliers. b β value versus administered activity × acquisition time (AT) (min/bed × MBq/kg). The β value for all patients at different AT to obtain the same noise level as for the reference image (AT of 16 with a β of 300) (a)

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