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Abstract #4314

29-channel Receive-only Dense Dipole Head Array for 7T MRI

Bei Zhang1, Gang Chen1,2, Martijn Cloos1, Zidan Yu1,2, Jerzy Walczyk1, Christopher Collins1,2, Ryan Brown1, Riccardo Lattanzi1,2, Daniel Sodickson1,2, and Graham Wiggins1

1Bernard and Irene Schwartz Center for Biomedical Imaging, Department of Radiology, New York University School of Medicine, New York, NY, United States, 2The Sackler Institute of Graduate Biomedical Sciences, New York University School of Medicine, New York, NY, United States

Inspired by recent theoretical work indicating that z-oriented currents could capture most of the optimal SNR and outperform loops in reception at high frequencies, we constructed and evaluated a close-fitting dense dipole receive-only head array with 29 elements. The array was combined with a dual-channel transmit birdcage for experiments. SNR was good throughout a head phantom at 7T and outperformed a commercial head coil in regions above and below the center. Future work will focus on detuning mechanisms for dipole elements to enable safe in-vivo measurements.

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