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| VOLUME 108 (2018) | ISSUE 6 | PAGE 445 |
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Magnetic resonance spectroscopy at 1.5 T with a hybrid metasurface
E. A. Brui+, A. V. Shchelokova+, A. V. Sokolov+*×, A. P. Slobozhanyuk+, A. E. Andreychenko+, V. A. Fokin+*×, P. A. Belov+, I. V. Melchakova+
+University of Information Technology Mechanics and Optics, International Research Center Nanophotonics and Metamaterials, 199034 S.-Petersburg, Russia *Federal Almazov North-West Medical Research Center, 197341 S.-Petersburg, Russia ×Milirary Medical Academy n.a. S.M. Kirov, Department of Radiology, 194044 S.-Petersburg, Russia
Abstract
A hybrid metasurface realized by a double array of brass wires inserted into two high-permittivity dielectric slabs at both sides was used to perform a magnetic resonance spectroscopy experiment at a 1.5 T clinical magnetic resonance scanner. The metasurface coupled inductively to a transceive birdcage body coil located within the scanner's bore. The metasurface demonstrated an enhancement of the signal-to-noise ratio of the magnetic resonance spectroscopy experiment in vitro. Up to a 7.4-fold signal-to-noise ratio gain for choline and creatine spectral lines was observed in the presence of the metasurface compared to the body coil alone. |