A Comparative Performance Study Between High and Standard Resolution Positron Emission Tomography Camera Using [18F] AV-133 in Prodromal Parkinson's Disease

September 2, 2026 updated by: Michael J. Fox Foundation for Parkinson's Research

A Comparative Performance Study Between High and Standard Resolution Positron Emission Tomography (PET) Camera Using [18F]AV-133 in Prodromal Parkinson's Disease [Dual PET AV133 in Prodromal PD]

This study is a single-center, longitudinal study and will be conducted at the Institute for Neurodegenerative (INDD) Site in New Haven, CT. This study aims to recruit participants from the ongoing Parkinson's Progression Markers Initiative AV-133 Prodromal Imaging sub study [PPMI 015] to obtain a second comparison imaging scan. In addition to being imaged with the standard Positron Emission Tomography (PET) camera after the [18F]AV133 injection in the PPMI 015 sub study, participants agreeing to a second scan will be imaged with the NeuroEXPLORER (NX) PET camera per this protocol.

This study will enroll approximately 25 participants at the INDD site. The dual PET scans will be completed at baseline, 1-and 2- years follow up. Participants may be asked to undergo further longitudinal scans based on the acquired study data.

All participants will have longitudinal clinical, biomarker, and genetic data for correlation analyses to imaging data from the PPMI Clinical study.

Study Overview

Status

Recruiting

Conditions

Intervention / Treatment

Study Type

Interventional

Enrollment (Estimated)

25

Phase

  • Phase 2

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Contact

Study Contact Backup

Study Locations

  • United States
    • Connecticut
      • New Haven, Connecticut, United States, 06510
        • Recruiting
        • Institute for Neurodegenerative Disorders
        • Principal Investigator:
          • Neha Prakash, MBBS
        • Contact:
        • Contact:

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

  • Adult
  • Older Adult

Accepts Healthy Volunteers

No

Description

Inclusion Criteria:

  1. Prodromal participant enrolled in the PPMI 015 sub study.
  2. Able to provide consent.

Exclusion Criteria:

a) Any medical or psychiatric condition or lab abnormality that precludes participation per investigators judgement.

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Diagnostic
  • Allocation: N/A
  • Interventional Model: Single Group Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Experimental: Prodromal Parkinson's disease (PD)
Drug: [18F] AV-133 PET Imaging
The study will compare the performance of [18F]AV133 on both NX and standard PET camera in study participants enrolled at the INDD site in PPMI 015.

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Comparison of tracer uptake between two camera using Standardized Uptake Value ratio
Time Frame: Up to 24 months
To compare [18F]AV133 Standardized Uptake Value Ratio (SUVR) in striatal regions and additional relevant regions for images acquired with NX compared to Siemens Biograph in all participants
Up to 24 months

Secondary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Longitudinal comparison of quantitative signals (SUVR) between two PET cameras
Time Frame: 24 months
To compare the longitudinal regional change in [18F]AV133 SUVR in images acquired with NX PET and Siemens Biograph PET
24 months
Correlation of AV133 longitudinal change to clinical motor change
Time Frame: 24 months
Correlation between longitudinal change in [18F]AV133 with NX derived SUVR in different brain regions and change in MDS-UPDRS score reported as correlation coefficient.
24 months
Correlation of AV133 longitudinal change to clinical cognitive change
Time Frame: 24 months
Correlation between longitudinal change in [18F]AV133 with NX derived SUVR in different brain regions and change in Montreal Cognitive Assessment (MoCA) score reported as correlation coefficient.
24 months
Correlation of AV133 Longitudinal change to CSF biomarker
Time Frame: 24 months
Correlation between longitudinal change in [18F]AV133 with NX derived SUVR in different brain regions and change in cerebrospinal fluid (CSF)- seed amplification assay (SAA) level reported as correlation coefficient.
24 months

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Michael J. Fox Foundation for Parkinson's Research

Investigators

  • Principal Investigator: Ken Marek, MD, Institute for Neurodegenerative Disorders

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

September 18, 2025

Primary Completion (Estimated)

December 1, 2027

Study Completion (Estimated)

December 1, 2027

Study Registration Dates

First Submitted

October 17, 2025

First Submitted That Met QC Criteria

September 2, 2026

First Posted (Actual)

September 9, 2026

Study Record Updates

Last Update Posted (Actual)

September 9, 2026

Last Update Submitted That Met QC Criteria

September 2, 2026

Last Verified

September 1, 2026

More Information

Terms related to this study

Other Study ID Numbers

  • PPMI 030

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

YES

IPD Plan Description

All data obtained during the conduct of this study will be sent to the Laboratory of Neuro Imaging (LONI) in Los Angeles, California to be stored indefinitely for research purposes. Research data will be made available to researchers to conduct analyses related to PD and other disorders. Researchers will be required to comply with the PPMI data agreement to receive data. All personally identifiable information will be removed before it is shared outside the study

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

Yes

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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