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Abstract #3357

Prospective motion correction using real-time FID navigator motion measurements

Tess E. Wallace1,2, Onur Afacan1,2, Tobias Kober3,4,5, and Simon K. Warfield1,2
1Computational Radiology Laboratory, Boston Children's Hospital, Boston, MA, United States, 2Harvard Medical School, Boston, MA, United States, 3Advanced Clinical Imaging Technology, Siemens Healthcare, Lausanne, Switzerland, 4Radiology, Lausanne University Hospital and University of Lausanne, Lausanne, Switzerland, 5LTS5, École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland

FIDnavs can be acquired extremely rapidly using standard scanner hardware and are consequently an attractive tracking strategy for prospective motion correction (PMC), which requires accurate pose updates to be passed to the sequence with minimal delay. In this work, we demonstrate for the first time the efficacy of PMC using FIDnav motion estimates in a moving phantom and in volunteers performing deliberate head motion. Real-time pose updates from measured FIDnavs enabled substantial improvements in image quality in structural scans acquired with motion. FID-navigated PMC is a promising method for motion-robust imaging of patients who have difficulty staying still during imaging.

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