Evaluation of Neuroinflammation FNOS PET/CT in HIV (+) and (-) Subjects With OUD and Healthy Controls

Participants will undergo approximately 60 minutes of dynamic whole-body scanning, including the brain, starting at approximately the time of injection of \[18F\]NOS. PET/CT imaging sessions will include an injection of ≤ 6.5 mCi (approximate range for most studies is anticipated to be 3.5-6.5 mCi) of \[18F\]NOS.