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Abstract #4079

Efficient 3D-Characterization of Metamaterial Devices for Enhanced Magnetic Resonance Imaging

Robin Niklas Wilke1, Endri Stoja2, Kyra Bekaan1,3, Dennis Philip1, Jürgen Jenne1, Diego Betancourt2, Simon Konstandin1, Reinhold Umathum1, Thomas Bertuch2, and Matthias Günther1,4
1MR Physics, Fraunhofer MEVIS, Bremen, Germany, Bremen, Germany, 2Antenna Technology and Electromagnetic Modelling, Fraunhofer Institute for High Frequency Physics and Radar Techniques FHR, Wachtberg, Germany, 3University of Oldenburg, Oldenburg, Germany, 4MR-Imaging and Spectroscopy, Faculty 01 (Physics/Electrical Engineering), University of Bremen, Bremen, Germany

We present a dedicated RF-measurement setup consisting of custom-build Tx/Rx coils, an automated positioning system and a vector network analyzer that is suitable for an efficient characterization of MR-metamaterial devices which is crucial during the design stage. We measure complex scattering parameters over a large volume in air and obtain dispersion curves of a magneto-inductive lens and a wire-resonator metasurface that have been designed for 3T applications. Strong field enhancement effects are observed close to the metasurface as well as the positional dependency of extrema in dispersion curves.

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