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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