This Protocol is a Sub-study Under the PPMI Program. It is a Longitudinal, Single-center Study to Assess the Performance of [18F]AV-133 Imaging Using High and Standard Resolution PET in Individuals Enrolled With Parkinson's Disease (PD) for up to 12 Months.

Inclusion Criteria

• Participants over the age of 18 who are enrolled in the PPMI Clinical protocol with a diagnosis of Parkinson's disease (PD) or Healthy Control participants enrolled in the PPMI Clinical protocol.
• Able to provide informed consent.
• Male or Female (females must meet additional criteria specified below as applicable)

• Females must be of non-childbearing potential or using a highly effective method of birth control 14 days prior to until at least 24 hours after injection of [18F]AV-133

• Non-childbearing potential is defined as a female that must be either postmenopausal (no menses for at least 12 months prior to PET scan) or surgically sterile (bilateral tubal ligation, bilateral oophorectomy or hysterectomy).
• Highly effective method of birth control is defined as practicing at least one of the following: A birth control method that results in a less than 1% per year failure rate when used consistently and correctly, such as oral contraceptives for at least 3 months prior to injection, an intrauterine device (IUD) for at least 2 months prior to injection, or barrier methods, e.g., diaphragm or combination condom and spermicide. Periodic abstinence (e.g., calendar, ovulation, symptothermal, post-ovulation methods) is not acceptable.
• Females of childbearing potential must not be pregnant, breastfeeding or lactating.

• Includes a negative urine pregnancy test prior to injection of [18F]AV-133 on day of PET scan.

Exclusion Criteria

• Received any of the following medications that might interfere with [18F]AV-133 PET imaging: tetrabenazine (TBZ) or methylphenidate, reserpine, or amphetamine derivative, within 1 month prior to the Baseline [18F]AV-133 injection.
• Any other medical or psychiatric condition or lab abnormality, which in the opinion of the investigator might preclude participation.