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Abstract #5444

Neurological MRI protocols for patients with DBS equipment in situ consistent with new B1+RMS -limited MR Conditional product label

Annie Papadaki1,2, M. Jorge Cardoso3, Stephen J. Wastling1,2, Tarek Yousry1,2, Ludvic Zrinzo4, Indran Davagnanam1,2, and John S, Thornton1,2

1Lysholm Department of Neuroradiology, National Hospital for Neurology and Neurosurgery, University College London Hospital, London, United Kingdom, 2Department of Brain Repair and Rehabilitation, Institute of Neurology, University College London, London, United Kingdom, 3Translational Imaging Group, Centre for Medical Image Computing (CMIC), Department of Medical Physics and Bioengineering, University College London, 4Unit of Functional Neurosurgery, Institute of Neurology, University College London

We modified routine clinical head MRI protocols to be compliant with a new MR conditional product label for deep brain stimulation (DBS) devices limiting B1+RMS to ≤2.0μT. 12 healthy volunteers were scanned using the routine and modified protocols. Quantitative signal to noise (SNR) and contrast to noise ratio (CNR) analysis was performed, as well as blinded rating of images by a neuroradiologist. Routine and B1+RMS -limited sequences yielded very similar SNR and grey vs. white matter CNR values, indicating that the B1+RMS condition had been achieved with minimum impact on image quality, consistent with the neuroradiologist’s qualitative assessment.

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