Fig. 4
Comparison of quantitative values according to the visually evaluated uptake grades. The uptake values in planar images showed significant differences according to visual grade (a). Significant differences in values were observed between all grades except in the right medial tibial and right patella regions, according to post-hoc tests. SUVmean differed significantly according to the grades visually assessed in SPECT/CT (b), and a significant difference between all grades was shown in the post-hoc test only in the areas of both patellae and the right medial tibia. On the other hand, SUVmax had significant differences in all grades in all areas, according to post-hoc tests (c)