RF coil operation at the ultrahigh field of 7T is fraught with technical challenges that limit the advancement of novel human in vivo applications at 7T. In this work, a hybrid technique combining a microstrip transmission line and a lumped-element L-C loop coil to form a double-nuclear RF coil for proton magnetic resonance imaging and carbon magnetic resonance spectroscopy at 7T was proposed and investigated. Network analysis revealed a high Q-factor and excellent decoupling between the coils. Proton images and localized carbon spectra were acquired with high sensitivity. The successful testing of this novel double-nuclear coil demonstrates the feasibility of this hybrid design for double-nuclear MR imaging and spectroscopy studies at the ultrahigh field of 7T.
Keywords: 7Tesla; Lumped-element L-C loop coil; Microstrip transmission line (MTL) resonator; Radio-frequency (RF) coil; Surface coil; Ultrahigh field magnetic resonance imaging (MRI); Ultrahigh field magnetic resonance spectroscopy (MRS).
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