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Abstract #0893

Pushing the acceleration performance of WAVE-CAIPI using a single-axis gradient insert – a simulation study

Alejandro Monreal Madrigal1, Edwin Versteeg1, and Jeroen Siero1,2
1Radiology, University Medical Center Utrecht, Utrecht, Netherlands, 2Spinoza Centre for Neuroimaging, Amsterdam, Netherlands

Wave-CAIPI achieves high acceleration factors by using wave-gradients to spread out aliasing in 3D. In this work, we present a simulation study investigating the gains in acceleration performance when using a single-axis gradient insert (Gmax = 200 mT/m and SRmax = 1300 T/m/s) for Wave-CAIPI. The simulations were performed by retrospectively under-sampling data with different combinations of wave-gradients while assessing the image quality after reconstruction. Here, a 16-fold acceleration was simulated without a noticeable decrease in image quality. Furthermore, the high gradient performance allowed for a 5-fold shorter readout time, which might make a combination of EPI and Wave-CAIPI feasible.

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