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Abstract #1627

A Novel Robust Algorithm to Correct for Eddy Current Distortions in High B-Value Diffusion MRI

Henrik Hansson1, Jimmy Ltt, 12, Freddy Sthlberg1,3, Markus Nilsson1

1Department of Medical Radiation Physics, Lund University, Lund, Sweden; 2Center for Medical Imaging and Physiology, Lund University Hospital, Lund, Sweden; 3Department of Diagnostic Radiology, Lund University, Lund, Sweden

Eddy currents distort diffusion-weighted images, which give rise to artefacts in the estimated apparent diffusion coefficient and the diffusion kurtosis. Current correction methods are not effective for b-values greater than 1000 s/mm2. We have developed a correction algorithm based on comparison of all images in an image set, instead of separate volumes. This allows model based distortion correction by maximizing the local correlation of the entire image set.