The purpose of this study is to test the performance of a web-based system for automated review of MRI images across 21 sites in the Parkinson Study Group. Each site will perform imaging, clinical scales, diagnosis, and will upload the data to the web-based software tool. The clinical diagnosis will be blinded to the diagnostic algorithm and the imaging diagnosis will be compared to the movement disorders trained neurologist diagnosis.

Participants will attend two study visits that will include questionnaires, a physical exam and motor exams and an MRI (during one of the visits).

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