Evaluation of Specific Absorption Rate of Tight-Fit Array Coils for Human Head MRI at 9.4T in Presence of EEG Caps

Motivation: The electroencephalography (EEG) in combination with MRI allows performing multi-modal imaging. The presence of EEG-caps can increase SAR of tight-fit transceiver RF-arrays at Ultra-High-Field. Goal(s): To numerically evaluate SAR generated by a tight-fit array at 9.4T in the presence of EEG-caps. Approach: Numerical models of 8-channel 9.4T transceiver arrays with EEG-electrodes were constructed. B1+ and SAR were simulated for the human head voxel models using CST Studio. Results: In this work, we numerically showed that EEG-caps don’t significantly change B1+ and SAR of the arrays at 9.4T. Furthermore, the created models of the caps can be used in future simulations. Impact: We numerically showed that EEG caps don’t significantly change B1+ and SAR of the arrays at 9.4T. The developed cap models can be used in future simulations