Towards a comprehensive framework for movement and distortion correction of diffusion MR images: Within volume movement.

ABSTRACT: Most motion correction methods work by aligning a set of volumes together, or to a volume that represents a reference location. These are based on an implicit assumption that the subject remains motionless during the several seconds it takes to acquire all slices in a volume, and that any movement occurs in the brief moment between acquiring the last slice of one volume and the first slice of the next. This is clearly an approximation that can be more or less good depending on how long it takes to acquire one volume and in how rapidly the subject moves. In this paper we present a method that increases the temporal resolution of the motion correction by modelling movement as a piecewise continous function over time. This intra-volume movement correction is implemented within a previously pr

SUBMITTER: Andersson JLR 

PROVIDER: S-EPMC5445723 | biostudies-literature | 2017 May

REPOSITORIES: biostudies-literature