[
ADRENOCORTICAL ADENOMA
[All patients received 0.5 mg dexamethasone orally four times a day for 72 h before MTO scanning. PET-CT imaging was performed on a GE Discovery PET/CT 690 scanner (GE Medical Systems). Non-contrast CT images were acquired over the adrenals (140 kV; 30 mA; slice thickness = 3.75 mm). Following an intravenous injection of [All MTO scans were analyzed and initially scored by a single experienced radiologist blinded to the AVS result. Three key features were used to determine the probability of unilateral PA: a focal adrenal nodule with Hounsfield units in keeping with a benign adrenocortical adenoma; uptake of [