Abstract #2636

MR Safety of Inductively-coupled and Conventional Intra-oral Coils

Agazi Samuel Tesfai¹, Simon Reiss¹, Thomas Lottner¹, Andreas Vollmer², Michael Bock¹, and Ali Caglar Özen ¹

¹Dept. of Radiology, Medical Physics, Medical Center – University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany, ²Department of Oral and Craniomaxillofacial Surgery, Center for Dental Medicine, University Medical Center Freiburg, Freiburg, Germany

Synopsis

Intraoral coils (IOCs) increase the signal-to-noise ratio in dental MRI exams several times over external coils. However, the intraoral coil placement might be associated with safety hazards such as RF heating. This study evaluates the safety of different IOCs using temperature and E-field measurements to detect temperature hotspots. An inductively-coupled and a wired IOC were constructed, E-field hotspots were detected and the temperature increase was measured showing that it remains below 1K over 6min RF exposure.

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