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Abstract #3966

Reference-Free Distortion Correction with Segmented Partial Fourier Acquisitions for High Resolution DTI at 7T

Michael Herbst1, Benedikt A Poser2, and Marco Reisert1

1Dept. of Radiology, Medical Physics, University Medical Center Freiburg, Freiburg, Germany, 2Department of Cognitive Neuroscience, Maastricht Brain Imaging Centre (MBIC)

Single-Shot diffusion weighted echo planar imaging (EPI) is known for its strong distortions due to long imaging readouts. However, even for segmented acquisitions, high resolution diffusion weighted imaging suffers from image distortions. Our approach shows that intrinsic field information of a segmented DTI acquisition can be used for robust distortion correction without blurring effects. In addition this approach offers the advantage to reduce artifacts from partial Fourier (PF) acquisitions due to better data distribution in k-space. In combination with the MUSE approach, this promising technique is applied to whole brain DTI with a resolution of 1mm isotropic.

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