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Abstract #1834

Combining FID navigators with field probe monitoring for improved head motion tracking and prospective correction at 7T

Matthias Serger1, Ruediger Stirnberg1, Philipp Ehses1, and Tony Stoecker1,2
1German Center for Neurodegenerative Diseases (DZNE), Bonn, Germany, 2Department of Physics and Astronomy, University of Bonn, Bonn, Germany

Synopsis

Keywords: Motion Correction, Motion CorrectionFID navigators and field probes can measure local motion-induced magnetic field changes at different positions. Both methods are suited for marker-less prospective motion correction but with limited accuracy. A small 7T study with five subjects was performed to compare their performance for small involuntary and large voluntary motion. It is demonstrated that errors of regression models, calibrated between magnetic field measurements and motion parameters, are consistently reduced by combining both techniques. Furthermore, a proof-of-concept prospective motion correction experiment based on FID navigators is presented, which will be extended to include field probe measurements in the near future.

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