Clinical Translation of a Novel Brain PET Insert for Simultaneous PET/MR

Inclusion Criteria: 1. Whole body radiation dose within the last year of less than 5000 mrem 2. Subjects intended for injected tracer studies (not associated with another study) must be willing/able to undergo injection of 6-12 mCi of either FDG or Neuraceq radiotracer. Both tracers are FDA approved 3. Subjects will be at least 21 years of age 4. Subject provides written informed consent 5. Subject is deemed healthy by the PI by via self-reported questionnaire Exclusion Criteria: 1. For patients who will be receiving a tracer injection, no known allergy to the imaging agents 2. Participant has a history of or current diagnosis of cancer 3. Participant is pregnant or nursing 4. Metallic implants (contraindicated for MRI)