Abstract #0390

Towards imaging the body at 10.5 Tesla using a fractionated dipole antenna array

M. Arcan Erturk¹, Gregor Adriany¹, Pierre-Francois Van de Moortele¹, Yigitcan Eryaman¹, Alexander J Raaijmakers², Lance DelaBarre¹, Edward Auerbach¹, J. Thomas Vaughan¹, Kamil Ugurbil¹, and Gregory J Metzger¹

¹Center for Magnetic Resonance Research, University of Minnesota, Minneapolis, MN, United States, ²Imaging Division, UMC Utrecht, Utrecht, Netherlands

We have developed a fractionated dipole antenna (fDA) for body imaging at 10.5T, investigated its electro-magnetic field behavior in a 10-channel array using numerical simulations in a human model, and compared its performance to a 10-channel fDA array at 7.0T. The 10.5T fDA array provided similar B1+ transmit efficiency and peak 10g-averaged SAR compared to the 7.0T array inside the prostate, however had a less uniform B1+ distribution. Simulation results indicated that fDA elements have sufficient B1+ penetration at 10.5T, but B1+ non-uniformities may need to be alleviated even in small imaging targets using dynamic RF strategies including parallel transmit.

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