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Abstract #2720

Models of Parasitic Mutual Capacitance in Array Coils: Effects on Mutual Reactance, Resistance and Noise Correlation

Adam Maunder1, Mojgan Daneshmand1, Pedram Mousavi1, B. Gino Fallone2, Nicola De Zanche2

1Electrical and Computer Engineering, University of Alberta, Edmonton, Alberta, Canada; 2Oncology, University of Alberta, Edmonton, Alberta, Canada

Despite its impact on array coupling and design, especially for higher frequencies, capacitance between coils has not been studied quantitatively. The proposed capacitive coupling circuit model is shown to accurately predict simulated and measured impedance changes, as well as measured noise correlations. An important application is the reduction or elimination of both reactive and resistive coupling with appropriate adjustments of inter-element capacitance. This model includes mutual inductance and resistance, and quantifies the effect and amount of parasitic capacitive coupling.