Abstract #0131

Novel Intraoral Dipole Antenna for Dental Applications

Ali Caglar Özen^1,2, Djaudat Idiyatullin³, Gregor Adriany³, Steve Jungst³, Naoharu Kobayashi³, Beth R. Groenke⁴, Michael Bock¹, Michael Garwood³, and Donald R. Nixdorf^4,5

¹Deptartment of Radiology, Medical Physics, University Medical Center Freiburg, University of Freiburg, Freiburg, Germany, ²German Consortium for Translational Cancer Research Partner Site Freiburg, German Cancer Research Center (DKFZ), Heidelberg, Germany, ³Center for Magnetic Resonance Research and Department of Radiology, University of Minnesota, Minneapolis, MN, United States, ⁴Division of TMD & Orofacial Pain, School of Dentistry, University of Minnesota, Minneapolis, MN, United States, ⁵Department of Neurology and Radiology, Medical School, University of Minnesota, Minneapolis, MN, United States

Previous studies showed that in dental MRI intraoral loop coils provide higher signal-to-noise ratio (SNR) than extraoral coils. An intraoral dipole that fits the dental arch can be used for reduced FOV and high transmit efficiency. Besides, dipoles do not restrict tongue movement. The design approach is based on comparative FDTD field simulations. The best transmit efficiency and homogeneity was achieved with a multi-wire curved dipole antenna. Additional high-permittivity cap further improved the transmit field inhomogeneity. When combined with extraoral flexible shielded loop resonators, SNR was increased and the coupling between the coils was less than -32dB.

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