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Fig. 1E —49-year-old man with bronchogenic carcinoma and 1.5-cm left adrenal nodule. 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 from metastasis. Average standardized uptake value (SUV) of adrenal nodule was 1.4, and average SUV of liver was 2.3. Because its SUV was less than that of liver, nodule was considered PET negative. Finding was considered true-negative and benign on basis of imaging stability over 3 years.