Abstract #2179

Effect of Dielectric Resonator (DR) Modes on RF-Magnetic Field

Parisa Lotfi Poshtgol¹, Navid Pourramzan Gandjii¹, Michael Lanagan², Eugene Furman³, Soo Han Soon⁴, Xinlian Chen⁵, Saber Soltani⁶, Xiao-Hong Zhu⁴, Christopher T. Sica¹, Hannes M Wiesner⁴, Wei Chen⁴, kamil Ugurbil⁴, and Qing X Yang¹

¹Departments of Neurosurgery and Radiology, College of Medicine, Pennsylvania State University, Hershey, PA, United States, ²Department of Engineering Science and Mechanics, Pennsylvania State University, State college, PA, United States, ³Materials Research Institute, Pennsylvania State University, State college, PA, United States, ⁴Center for Magnetic Resonance Research, University of Minnesota, Minneapolis, MN, United States, ⁵Department of Biomedical Engineering, South China University of Technology, Guangzhou, China, ⁶Department of Electrical Engineering, The Pennsylvania State University, State college, PA, United States

Synopsis

Dielectric resonators with Ultra-High Dielectric Constant (uHDC) materials possess intrinsic resonance modes that have been used for RF transmission and reception. The resonance modes and conditions of the uHDC discs were studied through computer simulations. We compared the B₁+ field and RX-sensitivity when employing cylindrical uHDC discs at both resonant and non-resonant conditions. We showed in this work, to achieve the best focusing effect into phantom, the design with uHDC material should operate around the first TE_01δ mode and lower than the second mode TE_01δ with the highest permittivity.

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