Abstract #4079

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

Robin Niklas Wilke¹, Endri Stoja², Kyra Bekaan^1,3, Dennis Philip¹, Jürgen Jenne¹, Diego Betancourt², Simon Konstandin¹, Reinhold Umathum¹, Thomas Bertuch², and Matthias Günther^1,4

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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