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Abstract #2703

Design of Self-Resonance Modes (SRM) of monolithic ultra-high dielectric constant (uHDC) materials and RF Coils for B1 field enhancement

Sebastian Rupprecht1, Buddhi Tilakaratne1, Chris R Messner1, Christopher Sica1, Michael T Lanagan2, Wei Chen3, and Qing X Yang1

1Department of Radiology, The Pennsylvania State University College of Medicine, Hershey, PA, United States, 2Department of Engineering Sciences and Mechanics, The Pennsylvania State University, State College, PA, United States, 3Radiology Department, Center for Magnetic Resonance Research, MN, United States

Ultra-high dielectric constant (uHDC) materials were established as an effective B1 shimming and enhancement tool in MRI. A dielectric material operates at certain frequency range and enhances fields at an anticipated resonance frequency. We trimmed a rectangular dielectric block such that the fundamental frequency mode of the block resonated at 3 T, and compared it with a similarly sized non-resonant block. Both cases were coupled with a transmit receive surface coil resonant at 123.2 MHz. The effect of the surface coil area on the B1 field enhancement was explored to optimize the dielectric and coil configuration.

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