In magnetic resonance imaging (MRI), inhomogeneity in the main magnetic field used for imaging, referred to as off-resonance, can lead to image artifacts ranging from mild to severe depending on the application. Off-resonance artifacts, such as signal loss, geometric distortions, and blurring, can compromise the clinical and scientific utility of MR images. In this review, we describe sources of off-resonance in MRI, how off-resonance affects images, and strategies to prevent and correct for off-resonance. Given recent advances and the great potential of low field and/or portable MRI, we also highlight the advantages and challenges of imaging at low field with respect to off-resonance.
@article{arxiv.2205.01028,
title = {Off-resonance artifact correction for magnetic resonance imaging: a review},
author = {Melissa W. Haskell and Jon-Fredrik Nielsen and Douglas C. Noll},
journal= {arXiv preprint arXiv:2205.01028},
year = {2022}
}