Sequence-agnostic motion-correction leveraging efficiently calibrated Pilot Tone signals.

ABSTRACT:

Purpose

This study leverages externally generated Pilot Tone (PT) signals to perform motion-corrected brain MRI for sequences with arbitrary k-space sampling and image contrast.

Theory and methods

PT signals are promising external motion sensors due to their cost-effectiveness, easy workflow, and consistent performance across contrasts and sampling patterns. However, they lack robust calibration pipelines. This work calibrates PT signal to rigid motion parameters acquired during short blocks (˜4 s) of motion calibration (MC) acquisitions, which are short enough to unobstructively fit between acquisitions. MC acquisitions leverage self-navigated trajectories that enable state-of-the-art motion estimation methods for efficient calibration. To capture the range of patient motio

SUBMITTER: Brackenier Y 

PROVIDER: S-EPMC7617263 | biostudies-literature | 2024 Nov

REPOSITORIES: biostudies-literature