Abstract #2230

Assessment of RF induced heating of intracranial Micro-depth electrodes during MRI

Anastasia Papadaki^1,2, David Carmichael³, Andrew McEvoy^4,5, Anna Miserocchi^4,5, Tarek Yousry^1,2, Beate Diehl^4,6, Louis Lemieux⁴, and John S Thornton^1,2

¹Lysholm Department of Neuroradiology, National Hospital for Neurology and Neurosurgery, UCLH, London, United Kingdom, ²Department of Brain Repair and Rehabilitation, UCL Institute of Neurology, London, United Kingdom, ³Imaging and Biophysics Unit, UCL Institute of Child Health, London, United Kingdom, ⁴Department of Clinical and Experimental Epilepsy, UCL Institute of Neurology, London, United Kingdom, ⁵Department of Neurosurgery, National Hospital for Neurology and Neurosurgery, London, United Kingdom, ⁶Department of Neurophysiology, National Hospital for Neurology and Neurosurgery, London, United Kingdom

In this study we assessed temperature changes (∆T) during MRI in the vicinity of microwires EEG electrodes in a phantom. Measurements were performed at 1.5T during a high SAR TSE sequence for two different depth electrode arrangements with and without microwires. Although we observed a small temperature rise due to the presence of microwires the maximum temperature change ∆T did not exceed 1°C at 1.5T.

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