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Abstract #1314

Evaluating the RF Heating of Titanium Craniofacial Mesh Implants at 7T

Mazin M. Mustafa1, Nur Izzati Huda Zulkarnain-Lemke1, Alireza Sadeghi-Tarakameh1, Andrea Grant1, Can Ozutemiz1, David Darrow2, and Yigitcan Eryaman1
1Center for Magnetic Resonance Research, University of Minnesota, Minneapolis, MN, United States, 2Department of Neurosurgery, University of Minnesota, Minneapolis, MN, United States

Synopsis

Keywords: Safety, Safety, Titanium Mesh Head Implant, 7T, RF Coil Safety

Motivation: The RF safety risks associated with titanium mesh head implants are not well assessed for 7T MRI preventing patients undergoing craniofacial surgery from being scanned.

Goal(s): To evaluate the RF heating caused by titanium mesh head implants at 7T MRI.

Approach: A titanium mesh implant was 3D scanned to generate a CAD model. Electromagnetic and thermal simulations were conducted in phantoms and anatomical human models. Simulation models were validated with experimental measurements.

Results: The introduction of titanium mesh implants may increase the local 1g-average SAR and temperatures near the mesh edges. The maximum absolute temperature in the head remained the same.

Impact: Imaging titanium mesh head implants for skull reconstruction procedures may be safe for MR scan at 7T following the IEC guidelines.

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Keywords