Abstract #5444

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

Annie Papadaki^1,2, M. Jorge Cardoso³, Stephen J. Wastling^1,2, Tarek Yousry^1,2, Ludvic Zrinzo⁴, Indran Davagnanam^1,2, and John S, Thornton^1,2

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 B_1+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 B_1+RMS -limited sequences yielded very similar SNR and grey vs. white matter CNR values, indicating that the B_1+RMS condition had been achieved with minimum impact on image quality, consistent with the neuroradiologist’s qualitative assessment.

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