Accurate free‐water estimation in white matter from fast diffusion MRI acquisitions using the spherical means technique

Purpose To accurately estimate the partial volume fraction of free water in the white matter from diffusion MRI acquisitions not demanding strong sensitizing gradients and/or large collections of different b‐values. Data sets considered comprise 32‐64 gradients near plus 6 gradients near . Theory and Methods The spherical means of each diffusion MRI set with the same b ‐value are computed. These means are related to the inherent diffusion...