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Abstract #0627

A 7 T Spine Array Combining Dipole Transmitters and Loop Receivers

Qi Duan 1 , Govind Nair 2 , Natalia Gudino 1 , Jacco A. de Zwart 1 , Peter van Gelderen 1 , Joseph Murphy-Boesch 1 , Daniel S. Reich 2 , Jeff H. Duyn 1 , and Hellmut Merkle 1

1 Laboratory of Functional and Molecular Imaging, NINDS, National Institutes of Health, Bethesda, MD, United States, 2 Division of Neuroimmunology and Neurovirology, NINDS, National Institutes of Health, Bethesda, MD, United States

To date, loop-based arrays are still the prevailing design for 7 T spine imaging. In this work, a prototype that combines loops for signal reception with electric dipole antennae for transmit is presented. It aims to circumvent the dilemma for optimizing loop arrays at 7 T caused by the conflicting extended field-of-view and short wavelength. In comparison with a previous loop-based design, the new array has simpler cabling and higher transmit efficiency, even after correcting for slightly elevated SAR deposition. The reduced power need could be exploited to increase resolution or acquisition speed more than twofold.

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