Rapid prospective motion correction using free induction decay and stationary field probe navigators at 7T.

ABSTRACT:

Purpose

MR-based FID navigators (FIDnavs) do not require gradient pulses and are attractive for prospective motion correction (PMC) due to short acquisition times and high sampling rates. However, accuracy and precision are limited and depend on a separate calibration measurement. Besides FIDnavs, stationary NMR field probes are also capable of measuring local, motion-induced field changes. In this work, a linear model is calibrated between field probe data and motion parameters analog to FIDnav calibration and both tracking methods are compared and combined for PMC.

Methods

FIDnavs and field probe navigators were implemented in a fast 3D-EPI sequence and calibrated by a linear model to realignment motion parameters of the 3D-EPI time series. A workflow was established to co

SUBMITTER: Serger M 

PROVIDER: S-EPMC12021338 | biostudies-literature | 2025 Jul

REPOSITORIES: biostudies-literature