Abstract #4152

Feasibility of personalized RF safety monitoring in pTx MRI using linear registration versus non-linear registration

Hongbae Jeong¹, Jesper Andersson¹, Aaron T. Hess², and Peter Jezzard¹

¹Wellcome Centre for Integrative Neuroimaging, FMRIB Division, Nuffield Department of Clinical Neurosciences, University of Oxford, Oxford, United Kingdom, ²Oxford Centre for Clinical Magnetic Resonance Research, Department of Cardiovascular Medicine, University of Oxford, Oxford, United Kingdom

In this study, we demonstrate the feasibility of personalised RF safety monitoring in pTx MRI using linear registration versus non-linear registration. We evaluate this by using two well-characterised models, Duke, and MIDA. An 8-channel dipole array was used to evaluate maps of 10g averaged SAR across a range of B₁⁺ shims, showing potential utility of linear registration (rotation, scaling, skew, translation). Our study shows that both linear registration and non-linear registration can be used to monitor SAR in pTx MRI to reduce the safety margin arising from differences in patient head position, shape and size.

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