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Abstract #1228

Accelerating beyond the sound limit: Ultrasonic Wave-CAIPI using a dual-axis head gradient insert

Thomas Roos1, Jeroen Siero1,2, Dennis Klomp1, Matthias Wienke1, Jannie Wijnen1, and Edwin Versteeg1
1Department of High Field MR Research, University Medical Center Utrecht, Utrecht, Netherlands, 2Spinoza centre for Neuroimaging, Amsterdam, Netherlands

Synopsis

Keywords: Gradients, New Trajectories & Spatial Encoding Methods, UltrasonicIn this work, we present peripheral nerve stimulation and imaging results for a dual-axis head gradient that operates at ultrasonic frequencies. PNS measurements on 4 volunteers did not yield any noticeable stimulation. Imaging was performed using an ultrasonic Wave-CAIPI MP-RAGE, which featured ~20-fold acceleration and fully-sampled K-space coverage. We show the first images with this approach and a g-factor close to unity.

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Keywords