Planar quadrature coil design using shielded-loop resonators.
The shielded-loop resonator is known to have a low capacitive sample loss due to a perfect balancing. In this paper, it is demonstrated that shielded-loop technology also can be used to improve design of planar quadrature coils. Both a dual-loop circuit and especially a dual-mode circuit may benefit from use of shielded-loop resonators. Observations in measurements agree with theory for both a dual-loop coil and a dual-mode coil. The coils were designed for use as transmit/receive coil for 1H imaging and spectroscopy at 4.7 T in rat brain.
Stensgaard
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Danish Research Center of Magnetic Resonance, Hvidovre Hospital, Copenhagen, Denmark.
D000818:Animals; D001921:Brain / Q000033:anatomy & histology; D008279:Magnetic Resonance Imaging / Q000295:instrumentation* / Q000379:methods; D051381:Rats