Multimodal Imaging Outcome Measures for ALS (Image ALS)

"A dose of ≤ 20 mCi (approximate range for most studies is anticipated to be 5-20 mCi) of \[11C\]-PBR28 will be administered by IV injection to the patient under the direct supervision of a Nuclear Medicine Authorized User. A lesser activity may be injected if, in the opinion of a nuclear medicine authorized user complete imaging data could be generated.~Subjects will undergo an approximately 90 minute dynamic PET/CT scan over the brain starting at approximately the same time as the \[11C\]-PBR-28 injection. Scans will be acquired using a Philips PET/CT time-of-flight Ingenuity scanner (Philips Healthcare, Cleveland, OH, USA). At the end of the dynamic imaging the participant will be allowed to get off the scanner."