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FIGURE 5. Box plots of SUV ratios for patients with active and inactive adenomas and noncortical tumors: tumor to normal adrenal for 11C-metomidate (MTO) (A) and tumor to liver for 18F-FDG (B). The error bars and lines within boxes represent the highest and lowest quartiles and the medians, respectively, of the data distribution. The 11C-metomidate SUV ratio well distinguishes adenomas from other tumors, whereas 18F-FDG shows clearly higher values for noncortical tumors. Because noncortical tumors have a very mixed character, they do not take up significantly more 18F-FDG than do adenomas.
