Fig. 6.
Spearman correlation analysis of tracer uptake for organs (a SUVmean, b SUVmax) shows strong positive monotonic correlations for both SUVmean and SUVmax from PET/MR and those from PET/CT. SUVmean ρ = 0.868, n = 470, p < 0.001; SUVmax ρ = 0.872, n = 470, p < 0.001. Bland-Altman plots of SUVmean (c) and SUVmax (d) for organs on PET/MR and PET/CT. Differences and limits of agreement (bias ± 2SD) are expressed as a function of the average SUVs from PET/MR and from PET/CT. The systematic underestimation of SUVs from PET/MR is proportional to the SUV