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PET/CT for Adrenal Assessment

2010; American Roentgen Ray Society; Volume: 195; Issue: 2 Linguagem: Inglês

10.2214/ajr.09.3845

1546-3141

Michael A. Blake, Priyanka Prakash, Carmel G. Cronin,

Medical Imaging Techniques and Applications

W91 Imaging Features Normal Adrenal Gland The normal adrenal gland is larger than the spatial resolution of PET; however, it is usually barely visible on FDG PET. Combined PET/ CT can show normal mild FDG uptake in the location of the glands visible on the coregistered CT (Figs. 1 and 2). The average mean and maximum standardized uptake values (SUVs) are 0.90 ± 0.15 (SD) and 0.83 ± 0.17, respectively, for the right adrenal and 1.10 ± 0.15 and 0.946 ± 0.15 for the left adrenal. The maximum SUVs of normal adrenal glands range from 0.95 to 2.46 [4]. An adrenal is usually considered malignant if its intensity is higher than that of the liver; however, because the average mean SUV of the liver is 1.5–2.0, physiologic adrenal uptake may, in some cases, be in the range of malignant lesions.