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Abstract #4876

RF Heating of Gold Cup and Conductive Plastic Electrodes during Simultaneous MRI and EEG

Mukund Balasubramanian 1 , William M. Wells 2 , John R. Ives 3 , Patrick Britz 4 , Tobias Loddenkemper 5 , Padmavathi Sundaram 1 , Robert V. Mulkern 1 , and Darren B. Orbach 1

1 Department of Radiology, Boston Children's Hospital, Boston, Massachusetts, United States, 2 Department of Radiology, Brigham and Women's Hospital, Boston, Massachusetts, United States, 3 Ives EEG Solutions, Inc., Newburyport, Massachusetts, United States, 4 Brain Products GmbH, Gilching, Germany, 5 Department of Neurology, Boston Children's Hospital, Boston, Massachusetts, United States

The EEG electrodes used in clinical settings are typically removed prior to MRI scanning at 3T due to RF heating concerns. Since it would be advantageous to leave these electrodes on during routine clinical scans and to record from them during functional MRI scans, we measured the temperature changes under two types of clinical electrodes during a variety of 3T MRI scans, using watermelons as phantoms. Our results suggest that these electrodes could be used safely at 3T, as long as the EEG wire lengths and the SAR of the MRI sequences are both carefully taken into consideration.

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