Journal: Micromachines

Article Title: Silicon Carbide and MRI: Towards Developing a MRI Safe Neural Interface

doi: 10.3390/mi12020126

Figure Lengend Snippet: Simulated normalized SAR 1mg around the Pt and 3C-SiC (both on Si substrate) samples containing three electrodes. E1, E2, and E3 denote short, medium, and long electrode, respectively. The results are normalized with the maximum SAR 1mg value that occurs at the vicinity of the largest Pt electrode. ( a ) Estimated normalized SAR 1mg for 3C-SiC via FEM electromagnetic simulations in ANSYS HFSS. Both top (top image) and cross-section (bottom images) views for each electrode illustrated. Maximum estimated SAR 1mg for 3C-SiC appeared at the tip of the longest electrode, while the averaged B 1 at the coil isocenter was ~10 µT. ( b ) Estimated normalized SAR 1mg distribution for the Pt sample. Estimated normalized SAR 1mg along the path starting from the tip of the E3 electrode to 2 mm away in the vertical plane (red line) as indicated in plot ( c ) and to 0.3 mm away in the horizontal plane (red line) as shown in plot ( d ). Maximum SAR 1mg occurred at tip of longest electrode. Results indicate a ~30% reduction in the maximum SAR 1mg for 3C-SiC compared to Pt.

Article Snippet: ANSYS HFSS (19.2, Ansys, Inc., Canonsburg, PA) was used to perform the FEM electromagnetic simulations.

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