Abstract #0268

RF transparent ultrafast gradient insert

Dennis Klomp^1,2, Edwin Versteeg¹, Riccardo Metere³, Andrew Webb⁴, Erik Van den Boogert³, David G Norris³, Matrino Borgo⁵, and Jeroen Siero^1,6

¹Radiology, UMC Utrecht, Utrecht, Netherlands, ²MRCoils, Zaltbommel, Netherlands, ³Donders institute for Brain Cognition and Behaviour, Radboud University, Nijmegen, Netherlands, ⁴Gorter center, Leiden UMC, Leiden, Netherlands, ⁵Futura Composites, Heerhugowaard, Netherlands, ⁶Spinoza Center for Neuroimaging, Amsterdam, Netherlands

Ultrafast gradient insert coils can boost EPI performance when designed as an independent 4^th gradient chain. However, at high operating frequencies, substantial eddy currents will be generated in the shields of RF coils. Here we show that RF shields can be removed without compromising MRI performance yet enabling two orders of magnitude increased gradient efficiency at high frequency.

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