Comparison of parallel MRI reconstruction methods for accelerated 3D fast spin-echo imaging.

Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine
Zhikui XiaoWalid E Kyriakos

Abstract

Parallel MRI (pMRI) achieves imaging acceleration by partially substituting gradient-encoding steps with spatial information contained in the component coils of the acquisition array. Variable-density subsampling in pMRI was previously shown to yield improved two-dimensional (2D) imaging in comparison to uniform subsampling, but has yet to be used routinely in clinical practice. In an effort to reduce acquisition time for 3D fast spin-echo (3D-FSE) sequences, this work explores a specific nonuniform sampling scheme for 3D imaging, subsampling along two phase-encoding (PE) directions on a rectilinear grid. We use two reconstruction methods-2D-GRAPPA-Operator and 2D-SPACE RIP-and present a comparison between them. We show that high-quality images can be reconstructed using both techniques. To evaluate the proposed sampling method and reconstruction schemes, results via simulation, phantom study, and in vivo 3D human data are shown. We find that fewer artifacts can be seen in the 2D-SPACE RIP reconstructions than in 2D-GRAPPA-Operator reconstructions, with comparable reconstruction times.

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Citations

Jan 18, 2013·Journal of Magnetic Resonance Imaging : JMRI·Mario ZellerHerbert Köstler
Feb 8, 2013·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·D J HollandS D Beyea
Jul 12, 2018·Physics in Medicine and Biology·P T S BormanM Glitzner
Jul 13, 2016·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·Sui-Cheng WangKeigo Kawaji
Dec 21, 2019·Molecular Imaging and Biology : MIB : the Official Publication of the Academy of Molecular Imaging·Dong-Hoon LeeDong-Cheol Woo

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