Abstract #4047

Stacked dipole arrays for 31P and 1H MRI in the body at 7T

Ria Forner¹, Ettore Flavio Meliadò^2,3, Martijn Lunenburg³, Catalina Arteaga de Castro³, Ladislav Valkovič⁴, Christopher T. Rodgers^4,5, Alexander Raaijmakers^2,6, and Dennis Klomp²

¹Radiology, UMC Utrecht, Utrecht, Netherlands, ²UMC Utrecht, Utrecht, Netherlands, ³TeslaDC, Zaltbommel, Netherlands, ⁴Oxford Centre for Magnetic Resonance Research, University of Oxford, Oxford, United Kingdom, ⁵Dept of Clinical Neurosciences, University of Cambridge, Cambridge, United Kingdom, ⁶Biomedical Engineering, Eindhoven University of Technology, Utrecht, Netherlands

While an RF birdcage integrated behind the bore-liner of a 7T MRI can provide relatively uniform ³¹P excitation, it requires substantial system integration activities. Here we present an alternative approach using an array of stacked dipole antennas where one is tuned to¹H and the other to ³¹P. The setup is significantly easier to configure and while ³¹P B₁⁺ uniformity is somewhat compromised, B₁⁺ is more efficient when compared to an integrated birdcage.

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