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Abstract #2803

Novel RF Resonator Using Microstrip at 3T

Hyeokwoo Son1, Ahryum Kim2, Jinyoung Choi3, Youngki Cho3, Hyoungsuk Yoo2

1School of Electronics Engineering , Kyungpook National University, Daegu, Korea; 2School of Electrical Engineering, University of Ulsan, Ulsan, Korea; 3School of Electronics Engineering, Kyungpook National University, Daegu, Korea

Magnetic Resonance Imaging (MRI) systems have good intrinsic SNR (signal-to-noise ratio) and are used an important instrument for diagnosis. Recently, transceive phased array coils using transmission lines in MRI systems have been studied for parallel imaging[1-3], RF shimming[4] and RF homogenization[5]. These coils are composed of several RF resonators that are independently controlled by adjusting the amplitude and phase of the excitation. Microstrip, one of most widely used transmission lines, is used to design a transceive array coil element. The RF resonators using microstrip operate at a Larmor frequency of 128 MHz (3T). In this paper, we introduce four different RF resonators and a slot loaded RF resonator shows better RF efficiencies than other three RF resonators.

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Keywords

adjusting alternates alternating amplitude angular arms array better candidate capacitive capacitors central channel coil coils combined components composed control controlled coupling design designs desired diagnosis diameter dielectric distance distribution domain effectively efficiencies eight electrical electronics element ends engineering except excitation field finite focused frequency generated geometries good height highest homogenization illustrates impedance important increasing independently inductive input instrument intrinsic introduce length lengths loaded loss material meander multichannel national near noise normalized novel operate optimized optimizing paper parallel peak performance phantom placed position power principle problems proposed recently reduce resonator resonators respectively rotating school several shimming slice slot spherical square stepped studied substrate superposition symmetrically systems terminated thick thin transmission validate variation varying watt whereas widely width widths