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Abstract #3454

Parallel Imaging using Metasurface Resonators

Robert Kowal1, Niklas Paulig1, Daniel Arnecke1, Lucas Knull1, Ivan Vogt1, Max Joris Hubmann1, Daniel Düx2, Bennet Hensen2, Marcel Gutberlet2, Frank Wacker2, Oliver Speck3, and Holger Maune4
1Research Campus STIMULATE, Otto von Guericke University Magdeburg, Magdeburg, Germany, 2Institute of Diagnostics and Interventional Radiology, Hannover Medical School, Hanover, Germany, 3Department of Biomedical Magnetic Resonance, Otto von Guericke University Magdeburg, Magdeburg, Germany, 4Chair of Microwave and Communication Engineering, Otto von Guericke University Magdeburg, Magdeburg, Germany

Synopsis

Keywords: Non-Array RF Coils, Antennas & Waveguides, Parallel Imaging, Metamaterial, Metasurface

Motivation: Metasurface resonators lead to a focusing of individual receive coils' sensitivity profiles, which might contradict parallel imaging methods. It has to be quantified to what degree this occurs to evaluate the feasibility of parallel imaging acceleration while using metasurfaces.

Goal(s): Quantify the compatibility of wireless metasurface resonators with parallel imaging.

Approach: Measurement of the inverse g-factors when using either the metasurface resonator or alternatively a conventional 4-channel coil, both combined with the table-integrated spine coil. This is done in phantom and in vivo.

Results: Minor differences (Δmean ≤ 0.05) were measured particularly in anterior-posterior acceleration when compared with an alternative conventional 4-channel coil.

Impact: We demonstrated and quantified the compatibility of wireless metasurface resonators with parallel imaging in phantom and in vivo. This enables future studies to expand the application area of these novel coil alternatives or develop special designs for improved parallel imaging.

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