1. A method for detecting and diagnosing Parkinson's disease in a human, comprising administering to a patient a synthetic glycerophosphocholine (GPC) compound based upon the following formula modified as set forth and consisting essentially of: by replacing at least one hydrogen atom on at least one methyl moiety with 19 F, or replacing at least one hydrogen atom on at least one methyl moiety with 18 F, and imaging a brain of said patient with a medical imaging process by measuring a signal intensity from the brain of said patient via said medical imaging process, wherein said signal intensity includes an output from a binding of plural molecules of said synthetic GPC compound to α-synuclein within the human brain to detect and diagnose Parkinson's disease.