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

✍ Scribed by Dong-Hyun Kim; Elfar Adalsteinsson; Daniel M. Spielman

• Publisher: John Wiley and Sons
• Year: 2004
• Tongue: English
• Weight: 417 KB
• Volume: 51
• Category: Article
• ISSN: 0740-3194
• DOI: 10.1002/mrm.20004

✦ Synopsis

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 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.