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Abstract #4376

A Novel 7T Transmit Array Using TE 01&[delta] Mode Dielectric Resonators

Jonathan Y. Lu1, Xiaoliang Zhang2, 3, Brian K. Rutt4

1Electrical Engineering Department, Stanford University, Stanford, CA, United States; 2Department of Radiology and Biomedical Imaging, University of California-San Francisco, San Francisco, CA, United States; 3UC Berkeley/UCSF joint graduate group in Bioengineering, San Francisco, CA, United States; 4Radiology Department, Stanford University, Stanford, CA, United States

We propose a novel transmit array coil design for use at 7T employing an array of dielectric resonators. Our design is composed of cylinders filled with deionized water, which after excitation by copper loops can function as transmit array elements. Using FDTD simulations, we have found that this design is easy to tune to high frequency, uses low cost material, and shows improved decoupling and B1+ efficiency compared to a loop array of matched dimension.

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Keywords

achieve addition address advantages aims amplitude another application appropriate array arrays assess away axial azimuthally bioengineering biomedical body capability capacitance capacitor cause challenge cheaply circuits circular coil coils constructed construction copper cost costs coupling created cylinder cylindrical decoupling decrease defined degree deionized design designs diameter dielectric dimensions domain driven easier easily efficiency electrical element elements error excite expect family fellowship field final finite foundation frequencies frequency future geometrically good graduate head heat height homogeneity human identical improved increments independently indicating inductance initial inner inside iteratively joint known length loaded loading loop loops lumped maps matched material materials measured metric mimic mode model modify nature near nontoxic normalized noticed novel parallel particularly peak performance phantom placed positioned power problem radiology radius reaching realistic resonator resonators rich sample science serves side simulations solver sources starting strong suggesting support system technical theoretical theory transmission transmit tuned tuning uniform useful utilizing view viewing virtual water