Open AccessVolume metasolenoid-based coil for 23Na MRI at 7 Tesla
Author(s) -
Georgiy Solomakha,
Anna Hurshkainen,
Stanislav Glybovski,
Anna Andreychenko
Publication year - 2020
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1461/1/012056
Subject(s) - electromagnetic coil , radiofrequency coil , nuclear magnetic resonance , magnetic resonance imaging , excitation , resonator , physics , volume (thermodynamics) , magnetic field , coupling (piping) , materials science , optics , radiology , medicine , quantum mechanics , metallurgy
In this work, we demonstrate a novel X-nuclei radiofrequency coil design aimed for ultra-high field magnetic resonance imaging. The proposed design is based on a set of coupled split-loop resonators, forming a so-called metasolenoid, fed via inductive coupling by a non-resonant loop. Due to the fundamental mode excitation in the metasolenoid the homogeneous RF magnetic field inside its inner volume is provided. 23 Na RF coil for human wrist imaging at 7 Tesla based on the proposed approach is demonstrated and investigated numerically. The design is compared with a commercially available volume birdcage coil. The comparative study revealed 60% improvement of SAR efficiency of metasolenoid coil operating in the linearly-polarized mode over the birdcage coil driven in the circularly polarized mode.