Comparison of prospective and retrospective motion correction in 3D-encoded neuroanatomical MRI.

ABSTRACT:

Purpose

To compare prospective motion correction (PMC) and retrospective motion correction (RMC) in Cartesian 3D-encoded MPRAGE scans and to investigate the effects of correction frequency and parallel imaging on the performance of RMC.

Methods

Head motion was estimated using a markerless tracking system and sent to a modified MPRAGE sequence, which can continuously update the imaging FOV to perform PMC. The prospective correction was applied either before each echo train (before-ET) or at every sixth readout within the ET (within-ET). RMC was applied during image reconstruction by adjusting k-space trajectories according to the measured motion. The motion correction frequency was retrospectively increased with RMC or decreased with reverse RMC. Phantom and in vivo experimen

SUBMITTER: Slipsager JM 

PROVIDER: S-EPMC8635810 | biostudies-literature | 2022 Feb

REPOSITORIES: biostudies-literature