MRI Image in Alzeimer's Patient (IMAGE) Radiological Society of North America Caption This image shows areas of reduced fractional anisotropy -- a diffusion MR imaging marker of white matter damage -- in 20 persons who develop Alzheimer's dementia compared to 20 who remain cognitively normal. These areas show up as blue-colored voxel overlaid onto a white matter skeleton (yellow colors) overlaid onto a standard template brain. 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.