Abstract #2063

Rotation estimation for cloverleaf navigators using a k-space map simulation

Tamsin Edwards Lambourne^1,2, André J. W. van der Kouwe^1,3, and Robert Frost^1,3

¹Athinoula A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital, Charlestown, MA, United States, ²Northeastern University, Boston, MA, United States, ³Department of Radiology, Harvard Medical School, Boston, MA, United States

Synopsis

Short <5 ms cloverleaf navigators have been demonstrated for prospective motion correction at a rate of 71 Hz in steady-state FLASH. The original cloverleaf approach required a 12 second k-space mapping pre-scan to reliably deal with out-of-plane rotations. Here we investigate simulation of a k-space map based on a low spatial resolution pre-scan. The approach shows potential for real-time detection of rigid-body rotation in the context of real-time self-correction of the cloverleaf orientation.

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