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Abstract #4047

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

Ria Forner1, Ettore Flavio Meliad├▓2,3, Martijn Lunenburg3, Catalina Arteaga de Castro3, Ladislav Valkovi─Ź4, Christopher T. Rodgers4,5, Alexander Raaijmakers2,6, 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 to 1H 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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