Parkinson's disease is the second most common neurodegenerative disorder in the world after Alzheimer's disease. Thanks to the pioneering works of Arvid Carlson in the 20th century identifying dopamine as the main neurochemical agent involved in Parkinson's disease's onset and progress, our understanding of the neuropathology has increased. The elaboration of L-Dopa as the first pharmacological treatment approach has brought new hope for curing or at least slowing the neurodegenerative progress and the decline of motor and cognitive functions in Parkinson's disease patients. To date, imaging...