A comparison of a normal DAT scan on the left and an abnormal DAT scan on the right, with the latter showing reduced dopamine uptake in the basal ganglia. A comparison of a normal DAT scan on the left and an abnormal DAT scan on the right, with the latter showing reduced dopamine uptake in the basal ganglia. Images were provided by Sean Colloby (Newcastle University, UK). DAT, dopamine transporter. Ajenthan Surendranathan, and John Tiernan O’Brien Evid Based Mental Health 2018;21:61-65 Copyright © by the BMJ Publishing Group Ltd, Royal College of Psychiatrists & British Psychological Society. All rights reserved.