Prospective motion correction for R 2 * and susceptibility mapping using spherical navigators.

ABSTRACT:

Purpose

To perform prospective motion correction (PMC) for improved R2*$$ {R}_2^{\ast } $$ and susceptibility mapping using a purely navigator-based approach.

Methods

Spherical navigators (SNAVs) were combined with an additional FID readout for simultaneous measurement of motion and zeroth-order field shifts. The resulting FIDSNAVs were interleaved for PMC of a multi-echo gradient echo sequence with retrospective B0$$ {B}_0 $$ correction. Experiments were performed on a 3T scanner with a 32-channel head coil. Performance was assessed in five volunteers with motion prompts derived from real unintentional motion trajectories.

Results

At short TEs, PMC alone was sufficient to achieve good image quality; at longer TEs, retrospective B0$$ {B}_0 $$ correction was often just

SUBMITTER: Hewlett M 

PROVIDER: S-EPMC11782710 | biostudies-literature | 2025 Apr

REPOSITORIES: biostudies-literature