Pilot-Tone Motion Estimation for Brain Imaging at Ultra-High Field Using FatNav Calibration
Tom Wilkinson1,2, Yannick Brackenier1,2, Felipe Godinez3, Raphael Tomi-Tricot1,2,4, Jan Sedlacik1,2, Philippa Bridgen1,2, Sharon Giles1,2, Joseph V Hajnal1,2, and Shaihan J Malik1,2
1Centre for the Developing Brain, School of Biomedical Engineering and Imaging Sciences, King's College London, London, United Kingdom, 2London Collaborative Ultra high field System (LoCUS), London, United Kingdom, 3Department of Radiology, University of California Davis, Sacramento, CA, United States, 4MR Research Collaborations, Siemens Healthcare Limited, Frimley, United Kingdom
3D FatNavs were used to provide a rapid, robust pre-scan to calibrate motion estimation from pilot-tone. The amount of training data required to make reliable forward predictions was investigated. This method robustly predicts motion within a dataset and can be applied to other datasets with lower accuracy. Improving the accuracy and speed of this method is ongoing work. This independent method of motion estimation shows promise for rapid calibration as part of routine examinations and paves the way to offer motion correction at ultra-high field where motion-correction is particularly relevant.
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