Reliability and Test–Retest Variability Analysis.
In order to assess the reliability and test–retest variability of the MWF data, we additionally acquired MRI data on seven healthy subjects (4F, average age± SD of 25 y ± 2). The dedicated reliability measurement assessed the test–retest variability of the MWF data within the corpus callosum. It was based on the acquisition of three consecutive, complete, 2D FLASH acquisitions for each of the seven healthy subjects. This included interval subject repositioning where the MRI technician took the subjects off and repositioned them on the scanner bed.The MRI acquisition and processing method we used in this study provides both absolute H