SV2A Density Cannabis Use Disorder

For each \[11C\]APP311 (UCB-J) PET scan, up to 20 mCi of \[11C\]APP311 (UCB-J) will be administered by infusion pump. All participants will receive at least two \[11C\]APP311 (UCB-J) PET scans approx. 4 weeks days apart. Approximately 8 CUD participants will be asked to return for a third \[11C\]APP311 (UCB-J) PET scan after an additional 4 weeks following their second scan.