If true this should be an advance in this study they imaged dead people and then did the histology to suggest whats seen is myelination, so more easy validation steps. Too often we see MR parameter this or MR parameter that described to be this or that, based on unconfirmed presumptions. Eg Gadolium is alway presumed to be cell infiltration, when it is probably just fluid movement and therefore is more extensive than cellular movement.