Brain Imaging (1 of 2) (IMAGE) Radiological Society of North America Caption T1-weighted MR imaging examination of the brain with superimposed population-level T-value map show significantly greater gray matter volume in female healthy control subjects than in women with substance dependence, after correction for age, brain size, and years of education. Credit Radiological Society of North America Usage Restrictions May use with 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.