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Asymmetric Dipole Head Array for Ultra-High-Field Magnetic Resonance Imaging Turns \textquotedblleftDielectric Resonance”from an Enemy to a Friend
{We developed a novel 9.4T (400MHz) human head transceiver array consisted of 8 optimized bent folded dipole antennas. Due to an asymmetrical shape of dipoles (bending) and the RF shield, the array simultaneously excites two modes including a circular polarized mode of the array itself, and the TE mode of the human head. Mode mixing can be easily controlled by changing the folded length. As a result, the new array provides superior whole-brain coverage compared to various 8-element loop and dipole arrays or even to a more complicated 16-element loop array. In addition, the maximum local SAR is substantially reduced.}
@misc{item_3248030, title = {{Asymmetric Dipole Head Array for Ultra-High-Field Magnetic Resonance Imaging Turns \textquotedblleftDielectric Resonance\textquotedblright from an Enemy to a Friend}}, booktitle = {{2020 ISMRM \& SMRT Virtual Conference \& Exhibition}}, abstract = {{We developed a novel 9.4T (400MHz) human head transceiver array consisted of 8 optimized bent folded dipole antennas. Due to an asymmetrical shape of dipoles (bending) and the RF shield, the array simultaneously excites two modes including a circular polarized mode of the array itself, and the TE mode of the human head. Mode mixing can be easily controlled by changing the folded length. As a result, the new array provides superior whole-brain coverage compared to various 8-element loop and dipole arrays or even to a more complicated 16-element loop array. In addition, the maximum local SAR is substantially reduced.}}, pages = {292}, year = {2020}, slug = {item_3248030}, author = {Avdievich, N and Solomakha, G and Ruhm, L and Bause, J and Henning, A and Scheffler, K} }