Fig. 2

Quantitative results of the retrospective study. a is Bland–Altman plots of liver SUVmean between the DPR group and the reference group in the retrospective study. All the DPR groups showed a good agreement on the quantification accuracy of the liver SUVmean with the reference. b–d are the comparison of the liver COV, lesion SUVmax and TLR between DPR groups and the reference in the retrospective study. The liver COV showed no significant difference between the DPR_1/3(r) group and the reference. All the DPR groups show a significantly elevated SUVmax and TLR compared to the reference group, indicating improved image contrast. ***p < 0.001; ns, no significant difference. Whisker indicates a standard deviation. COV, coefficient of variance. SUV, standardized uptake value. TLR, tumor-to-liver ratio