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Abstract #1444

Folded-End Dipole Transceiver Array for Human Whole Brain Imaging at 7 T.

Nikolai I. Avdievich1, Georgiy Solomakha2, Loreen Ruhm1, Anton V Nikulin1,3, Arthur Magill4, and Klaus Scheffler1,3
1High-Field MR Center, Max Planck Institute for Biological Cybernetics, Tübingen, Germany, 2Physics and Engineering, ITMO University, St. Petersburg, Russian Federation, 3Biomedical Magnetic Resonance, University of Tübingen, Tübingen, Germany, 4Medical Physics in Radiology, German Cancer Research Center, Heidelberg, Germany


In spite of great benefits of 7T MRI, its further clinical development is associated with difficulties in designing RF coils. Recently, we developed a novel type of dipole antennas, a folded-end dipole. In this work we evaluated an 8-element transceiver folded-end dipole array for 7T human head imaging. The array provided ~20% higher Tx-efficiency and significantly better whole-brain coverage than that of a widely-used commercial array. In addition, we evaluated passive dipoles for decoupling the proposed array. In contrast to the common unfolded dipole array, the passive dipoles produce practically no destructive interference with the RF field of the array.

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