Figure 5. Myocardial FDG uptake among 147 patients who underwent oncology PET. Serum free fatty acid level and heart SUVmax were measured in 147 patients who underwent FDG-PET for diagnosis of malignancy. (A) On FDG-PET without preparation for sarcoidosis evaluation, the heart and brain demonstrate higher SUVmax values than liver or muscle. (B) Serum free fatty acid level at time of FDG-PET shows inverse correlation with heart SUVmax, suggesting that serum fatty acid level > 1,000 μEq/L is needed at the time of myocardial FDG-PET imaging to suppress physiologic uptake of glucose in normal myocardium. FDG: fluorodeoxyglucose, PET: positron emission tomography, SUVmax: maximal standardized uptake value.
