Spiral readout gradients for the reduction of motion artifacts in chemical shift imaging. |
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| Authors: | Dong-Hyun Kim Elfar Adalsteinsson Daniel M Spielman |
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| Affiliation: | Radiological Sciences Laboratory, Department of Radiology, Stanford University, Stanford, California, USA. dhkim@stanford.edu |
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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. |
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| Keywords: | motion artifact reduction spiral CSI |
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