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Parkinson’s disease (PD) is a “clinical” diagnosis. This means that an individual’s history, symptoms, and physical exam are used to make the diagnosis. There is not a specific lab or imaging test that can diagnose PD. However, certain tests such as magnetic resonance imaging of the brain (MRI brain), a dopamine transporter scan (DaT scan), or blood work can be used to support the diagnosis of PD or to rule out other medical conditions that can mimic PD.