B₀ mapping using rewinding trajectories (BMART).

ABSTRACT:

Purpose

To create a B₀ map and correct for off-resonance with minimal scan time increase for two-dimensional (2D) or 3D non-Cartesian acquisitions.

Methods

Rewinding trajectories that bring the zeroth gradient moment to zero every repetition time (TR) were used to estimate the off-resonance with a center-out 3D cones trajectory, which required an increase in the minimum TR by 5%. The off-resonance estimation and correction was implemented using an algorithm based on binning and object-domain phase correction. B₀ maps using BMART (B₀ mapping using rewinding trajectories) were compared to maps obtained using separate scans with multiple echo time (TE) in a phantom and human brain.

Results

Excellent agreement between BMART and the multipl

SUBMITTER: Baron CA 

PROVIDER: S-EPMC5325829 | biostudies-literature | 2017 Aug

REPOSITORIES: biostudies-literature