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Abstract #0131

Novel Intraoral Dipole Antenna for Dental Applications

Ali Caglar Özen1,2, Djaudat Idiyatullin3, Gregor Adriany3, Steve Jungst3, Naoharu Kobayashi3, Beth R. Groenke4, Michael Bock1, Michael Garwood3, and Donald R. Nixdorf4,5
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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