Figure 4.

Transaxial images of the PET (A) and correlative CT (B) performed for diagnostic evaluation of lymphoma in a 32 year old woman (patient 18). Focal hypermetabolism is demonstrated in the right peri-adrenal region, which completely resolves on the post-diazepam PET/CT (panels C, D) repeated seven days later. Physioloic activity is noted in the left kidney on both pre- and post-diazepam PET studies. In addition, the patient had bilateral supraclavicular hypermetabolic BAT (not shown) which improved on the post-diazepam study.