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Fig. 2E —Example of PET-positive adrenal mass in 64-year-old man with
gastric carcinoma and 2.6-cm adrenal metastatic lesion. PET image of liver
shows results of quantitative analysis of 18F-FDG uptake of liver
obtained with 2D ROI on relatively homogeneous part of right lobe of liver,
which was free of metastasis. Average standardized uptake value (SUV) of
adrenal nodule was 8.1, greater than the 2.0 average SUV of liver. Hence
lesion was considered PET positive and true-positive because it increased in
size on follow-up studies, suggesting metastasis.
