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Abstract #3339

Randomizing simultaneously excited slice groups in SMS to reduce slice leakage artifacts in diffusion MRI

Daniel Olson1, Andrew Nencka2, Volkan Arpinar2, and L. Tugan Muftuler3

1Biophysics, Medical College of Wisconsin, Milwaukee, WI, United States, 2Radiology, Medical College of Wisconsin, Milwaukee, WI, United States, 3Neurosurgery, Medical College of Wisconsin, Milwaukee, WI, United States

Simultaneous Multi-slice (SMS) techniques excite multiple slices simultaneously to accelerate MRI data acquisition. However, slice separation during image reconstruction is not exact and results in coupling between separated voxels. While this may not be critical for most anatomic imaging methods, small but consistent leakage of information from another slice in a DTI dataset will cause bias in diffusion parameter estimates. Here, we propose a randomized-slice pairing technique to alleviate this problem in diffusion MRI acquisitions.

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