Figure 2From: Hyperintense putaminal rim at 1.5 T: prevalence in normal subjects and distinguishing features from multiple system atrophy Examples of regions-of-interest (ROIs) used in the measurement of MD values of the putamen. The ROIs were drawn manually on the echo-planar images with no diffusion weighting, and superimposed onto the MD maps. ROIs drawn on an echo-planar image with no diffusion weighting are shown.Back to article page