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Abstract #0752

Experimental and numerical calibration procedure for RF safety evaluation of implant-embedded sensors

Johannes Petzold1, Berk Silemek1, Lukas Winter1, Bernd Ittermann1, and Frank Seifert1
1Physikalisch-Technische Bundesanstalt (PTB), Braunschweig and Berlin, Germany

Synopsis

Keywords: Safety, Data AcquisitionEmbedded sensors in implants that communicate with an MRI system can improve patient safety substantially, in particular when parallel transmission is applied to mitigate the RF-heating risk. Calibration procedures and virtual models are presented in this work to support a rigorous safety assessment of this novel approach to implant safety. Experiments show a good correlation (r>0.96) between sensor signal (voltage at the tip) and field-probe measurements (E-field and temperature) for a custom-built reference implant. These results are further supported by simulations that can be extended to investigate more complex implant heating scenarios in human voxel models.

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Keywords