Abstract #3230
Radiofrequency-induced heating of intracranial stereo-EEG electrodes during MRI: a phantom study
Annie Papadaki 1,2 , David Carmichael 3 , Mark James White 1,2 , Hoskote Chandrashekar 1 , Tarek Yousry 1,2 , Beate Diehl 4,5 , Louis Lemieux 4 , and John Stephen Thornton 1,2
1
Lysholm Department of Neuroradiology,
National Hospital for Neurology and Neurosurgery, UCLH,
London, London, United Kingdom,
2
Department
of Brain Repair and Rehabilitation, UCL Institute of
Neurology, London, London, United Kingdom,
3
Imaging
and Biophysics Unit, UCL Institute of Child Health,
London, United Kingdom,
4
Department
of Clinical and Experimental Epilepsy, UCL Institute of
Neurology, London, United Kingdom,
5
Department
of Neurophysiology, National Hospital for Neurology and
Neurosurgery, UCLH, London, United Kingdom
In this study we assessed temperature changes (∆T)
during MRI at the tip of Stereo-electroencephalography
(SEEG) electrodes in a phantom. Fibre optic thermometry
measurements at the tip of two electrodes were performed
at 1.5T and 3T, during a high SAR TSE sequence and an
fMRI EPI sequence. Different electrode tail terminations
were tested to match possible clinical scenarios.
Scanning with electrode tails only, the maximum ∆T did
not exceed 1C at 1.5T, while it exceeded the guideline
limits at 3T. Connecting extension cables and varying
the cable termination has a significant effect in
RF-induced heating
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