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Abstract #5205

Resolution Enhancement in Ultra-High Field 3D Echo-Planar Imaging Using a Planes-on-a-Paddlewheel with Asymmetric Readout Train (POP-ART) Trajectory

Daniel Stäb1 and Markus Barth1

1The Centre for Advanced Imaging, The University of Queensland, Brisbane, Australia

3D planes-on-a-paddlewheel (POP) EPI is a non-Cartesian readout scheme realized by rotating EPI readout planes about the phase encoding axis. We show that the additional use of echo-asymmetry allows for significant improvements in spatial resolution without negative effects on echo-time, dropouts and distortions. The concept called POP-ART was evaluated at 7T. Whole brain images were obtained at a spatial resolution of 0.78x0.78x1.0mm3 within less than 1 minute by using an echo-asymmetry of only 28%. Being faster spoiled gradient-echo and providing resolutions not achievable by corresponding Cartesian EPI techniques, the trajectory is of interest for T2* weighted or quantitative susceptibility imaging.

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