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Abstract #2766

Simulation Study on Safety of Dental Implants at 7T

Joep Wezel1, 2, Wyger Brink1, Bert Jan Kooij2, Andrew Webb1

1C.J. Gorter center, Department of Radiology, Leiden University Medical Center, Leiden, Zuid-Holland, Netherlands; 2Microwave Technology and Systems for Radar, Technical University Delft, Delft, Zuid-Holland, Netherlands

The aim of this study is to determine whether scanning a person with a titanium dental retainer wire is safe at 7 Tesla. Touching the wire with the tongue causes loading of the wire, reducing the Q factor, but simultaneously brings the RF half-wavelength closer to the wire dimensions. Simulations with both phantom and head model suggest the latter effect is dominant. The overall conclusion is that, provided that a small air gap is present between wire and tongue, no tissue heating results and the use of such dental implants is safe.