Abstract #1372

3D rigid motion correction for navigated interleaved simultaneous multi-slice DWI

Malte Riedel (né Steinhoff)¹, Kawin Setsompop^2,3,4, Alfred Mertins¹, and Peter Börnert^5,6

¹Institute for Signal Processing, University of Lübeck, Lübeck, Germany, ²Athinoula A. Martinos Center for Biomedical Imaging, Charlestown, MA, United States, ³Department of Radiology, Harvard Medical School, Boston, MA, United States, ⁴Harvard‐MIT Health Sciences and Technology, MIT, Cambridge, MA, United States, ⁵Philips Research, Hamburg, Germany, ⁶Department of Radiology, C.J. Gorter Center for High-Field MRI, Leiden University Medical Center, Leiden, Netherlands

This work aims at improving the robustness of diffusion-weighted imaging (DWI) against 3D rigid head motion based on simultaneous multi-slice (SMS), interleaved echo-planar imaging (EPI) and image navigators. The proposed method utilizes low-resolution navigators to estimate diffusion phases as well as shot-wise 3D rigid motion through SMS-to-volume registration; providing high temporal resolution motion correction capability. The shot parameters are included into a full-volume reconstruction of the image data per diffusion direction. The method achieves submillimeter registration errors and improved image quality. In conclusion, the presented method enables retrospective 3D rigid motion correction for interleaved SMS DWI.

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