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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