Abstract #4245

Inductive and capacitive coupling modes of an RF coil to an ultra-High Dielectric Constant (uHDC) disk resonator

Parisa Lotfi¹, Soo-Han Soon², Navid P. Gandji¹, Michael Lanagan³, Hannes M. Wiesner², Xiao-Hong Zhu², Wei Chen², and Qing X Yang¹

¹Center for NMR Research, Departments of Neurosurgery and Radiology, College of Medicine, Pennsylvania State University, Hershey, PA, United States, ²Center for Magnetic Resonance Research, University of Minnesota, Minneapolis, MN, United States, ³Department of Engineering Science and Mechanics, Pennsylvania State University, State College, PA, United States

Synopsis

Keywords: Non-Array RF Coils, Antennas & Waveguides, High-Field MRI, Coil, Dielectric, coupling, SNRWe investigated capacitive and inductive couplings of an RF coil to an ultra-High Dielectric Constant (uHDC) disk resonator with a given resonance mode of similar frequency using simulation and experiments. Coupling of the RF coil and uHDC resonator can result in splitting the resonance into two modes: a parallel mode via inductive coupling and an anti-parallel mode via capacitive coupling. With the two resonators, the stronger and deeper penetration of the resultant B1 field is observed with parallel mode (in-phase) than anti-parallel mode (out-of-phase), which supports that the parallel mode is preferable for coupling uHDC resonators for MRI applications.

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