Abstract #5258

Pilot Tone vs pTx Scattering: A Comparison between ‘RF Sensor’ Methods for Rigid Body Motion Detection of the Brain at 7T

James L. Kent¹, Ladislav Valkovič^2,3, Iulius Dragonu⁴, Mark Chiew^1,5,6, and Aaron T. Hess¹

¹Wellcome Centre for Integrative Neuroimaging, FMRIB, Nuffield Department of Clinical Neurosciences, University of Oxford, Oxford, United Kingdom, ²Oxford Centre for Clinical Magnetic Resonance Research, John Radcliffe Hospital, University of Oxford, Oxford, United Kingdom, ³Department of Imaging Methods, Institute of Measurement Science, Slovak Academy of Sciences, Bratislava, Slovakia, ⁴Research & Collaborations GB&I, Siemens Healthcare Ltd, Camberley, United Kingdom, ⁵Department of Medical Biophysics, University of Toronto, Toronto, ON, Canada, ⁶Physical Sciences, Sunnybrook Research Institute, Toronto, ON, Canada

Synopsis

Keywords: Motion Correction, Motion CorrectionRF sensor methods for motion correction require no (or minimal) additional hardware, are sequence independent and have high temporal resolution. Several RF sensor-based methods for rigid-body head motion detection have been demonstrated but which method offers the most sensitivity to motion is yet unknown. We aim to compare the sensitivity of PT and pTxS methods by simultaneously measuring these signals during continuous motion, training a linear model from EPI registered images and analysing the ability to predict rigid head positions. Currently, we see little difference in their ability to predict rigid head motion but further investigation is needed.

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