Example Axial Sections (IMAGE) Radiological Society of North America Caption These are example axial sections of a three-dimensional MPF map (A) obtained from a 63-year old woman with SPMS disease course and results of brain tissue segmentation (B-D). Segmentation masks corresponding to white matter (WM) (B), gray matter (GM) (C), and lesions (D) were used to calculate mean MPF values in each tissue. 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.