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Abstract #4246

Disentangling coil coupling mechanisms through a Faraday equivalent model: application to the shielded-coaxial-cable (SCC) coil at 7T

Giovanni Costa1, Margarethus Maarten Paulides1, and Irena Zivkovic1
1Department of Electrical Engineering, Technical University of Eindhoven, Eindhoven, Netherlands

Synopsis

Keywords: RF Arrays & Systems, High-Field MRI, Coupling, SCC coils, Faraday's law of induction, SAR reductionMinimizing coupling between coils constitutes a major challenge in the design of flexible arrays for UHF MRI. Recently, Shielded-coaxial-cable coils (SCC) were shown to be flexible and intrinsically highly decoupled: however, the decoupling mechanism of SCC remains unclear. In this work, we use an high frequency Faraday-equivalent model of the induced voltage to examine coupling between two SCCs in different geometrical configurations. We show that lower coupling in SCC derives from both lower magnitude of electric and magnetic fields as compared to a loop coil, and we discuss the implications in the design of coils for MRI.

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