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A dual‐tuned transceive resonator for 13 C{ 1 H} MRS: two open coils in one
Author(s) -
Yahya Atiyah,
De Zanche Nicola,
Allen Peter S.
Publication year - 2013
Publication title -
nmr in biomedicine
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.278
H-Index - 114
eISSN - 1099-1492
pISSN - 0952-3480
DOI - 10.1002/nbm.2890
Subject(s) - electromagnetic coil , nuclear magnetic resonance , resonator , physics , coil noise , proton , radiofrequency coil , larmor precession , coil tap , atomic physics , magnetic field , optics , nuclear physics , rogowski coil , quantum mechanics
Proton‐decoupled, 13 C nuclear MRS experiments require a RF coil that operates at the Larmor frequencies of both 13 C and 1 H. In this work, we designed, built and tested a single‐unit, dual‐tuned coil based on a half‐birdcage open coil design. It was constructed as a low‐pass network with a resonant trap in series with each leg. Traps are tuned in alternate legs such that the two resonant modes arise from currents on alternate legs. The coil performance was compared with that of a dual‐tuned coil consisting of two proton surface coils operating in quadrature and a single surface coil for 13 C transmission and reception. The half‐birdcage coil was shown to produce a more homogeneous RF field at each frequency and was more sensitive to a 13 C signal arising from regions further from the coil surface. The applicability of the coil in vivo was demonstrated by acquiring a proton decoupled, natural abundance 13 C glycogen signal from the calf of a normal volunteer. Copyright © 2013 John Wiley & Sons, Ltd.