Spiral readout gradients for the reduction of motion artifacts in chemical shift imaging

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Abstract
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 kxy 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.