Abstract #4495

Prospective Motion Correction and Data Re-acquisition at 7 Tesla using E/M Trackers

W. Scott Hoge^1,2, Onur Afacan^2,3, Simon K. Warfield^2,3, Amir Roth⁴, and Erez Nevo⁴

¹Radiology, Brigham and Women's Hospital, Boston, MA, United States, ²Dept of Radiology, Harvard Medical School, Boston, MA, United States, ³Computational Radiology Laboratory, Boston Children's Hospital, Boston, MA, United States, ⁴Robin Medical, Inc., Baltimore, MD, United States

Synopsis

We evaluated the utility of electro-magnetic (E/M) based tracking to correct for motion at 7 Tesla. A 3D Turbo-FLASH sequence was modified to include prospective field-of-view (FOV) steering and track motion events. Custom software provided FOV updates to the TFL sequence from E/M sensor location measurements. Motion events recorded by the software indicated time-periods when acquired data was likely corrupted due to motion. Logic within the sequence re-acquired motion-corrupted k-space data segments to yield high-quality high-spatial-resolution images. Results demonstrate the viability of E/M tracking at 7T.

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