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. 2022 Mar 11;9:845806. doi: 10.3389/fmed.2022.845806

Figure 2.

Figure 2

Mean and SD (error line) of the percentage difference in SNR and TBR of TVREM compared to OSEM_3 according to lesion size: diameter <10 mm (A,D), 10 mm ≤ diameter <20 mm (B,E), diameter ≥20 mm (C,F). SD, standard deviation; SNR, signal-to-noise ratio; TBR, tumor-to-background ratio; TVREM, total variation regularized expectation maximization; OSEM, ordered subset expectation maximization.