Brain Iron Measures (IMAGE) Radiological Society of North America Caption Medication-naïve ADHD patients (ADHD-non-medicated) have reduced striatal (putamen (PUT), caudate nucleus (CN)) and thalamic (THL) magnetic field correlation (MFC) measures of brain iron compared to controls and psychostimulant medicated ADHD patients (ADHD-medicated). Brain iron measures in PUT, CN, THL or globus pallidus did not differ between controls and psychostimulant medicated ADHD patients. These statistical significant differences are visible in the MFC group maps (top row) but not in conventional relaxation rate maps: R2 (second row), R2*(third row), and R2' (bottom row). Credit Radiological Society of North America Usage Restrictions May use with proper credit License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.