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Abstract #1902

Mitigating Vibration Related Image Shading in Diffusion Weighted Imaging with Adaptive Homodyne Reconstruction

Dan Xu1, Brice Fernandez2, Kenichi Kanda3, Robert D. Peters1, Joe K. Maier3, R. Scott Hinks1

1Applied Science Lab, GE Healthcare, Waukesha, WI, United States; 2Applied Science Lab, GE Healthcare, Munich, Germany; 3MR Engineering, GE Healthcare, Waukesha, WI, United States

Homodyne processing with adaptively selected lowpass filter for phase map estimation was previously shown effective in reducing worm-like and shading artifacts sometimes seen in partial Fourier based diffusion weighted echo planar imaging (DW-EPI). Occasionally, image shading artifacts can also appear in DW-EPI images due to gradient induced table vibrations. In this paper, we show that a k-space centroid based adaptive homodyne method can be used to effectively mitigate the vibration related image shading artifacts.