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Spiral readout gradients for the reduction of motion artifacts in chemical shift imaging
Author(s) -
Kim DongHyun,
Adalsteinsson Elfar,
Spielman Daniel M.
Publication year - 2004
Publication title -
magnetic resonance in medicine
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.696
H-Index - 225
eISSN - 1522-2594
pISSN - 0740-3194
DOI - 10.1002/mrm.20004
Subject(s) - spiral (railway) , imaging phantom , artifact (error) , signal (programming language) , reduction (mathematics) , motion (physics) , noise (video) , signal to noise ratio (imaging) , nuclear magnetic resonance , physics , noise reduction , computer science , artificial intelligence , optics , mathematics , image (mathematics) , mathematical analysis , geometry , programming language
A motion artifact reduction method for proton chemical shift imaging (CSI) is presented. The method uses spiral‐based readout gradients for data acquisition. A characteristic of spiral‐based readout gradients is that data are repeatedly sampled at the k xy origin. These data points are used to estimate and correct for motion‐induced phase variations. Both phantom and in vivo spectra reconstructed using the new motion artifact reduction algorithm showed significant signal‐to‐noise ratio (SNR) improvements as compared to uncorrected data. Magn Reson Med 51:458–463, 2004. © 2004 Wiley‐Liss, Inc.