%0 Journal Article
%A Polak, Daniel
%A Setsompop, Kawin
%A Cauley, Stephen F
%A Gagoski, Borjan A
%A Bhat, Himanshu
%A Maier, Florian
%A Bachert, Peter
%A Wald, Lawrence L
%A Bilgic, Berkin
%T Wave-CAIPI for highly accelerated MP-RAGE imaging.
%J Magnetic resonance in medicine
%V 79
%N 1
%@ 0740-3194
%C New York, NY [u.a.]
%I Wiley-Liss
%M DKFZ-2018-00039
%P 401 - 406
%D 2018
%X To introduce a highly accelerated T1-weighted magnetization-prepared rapid gradient echo (MP-RAGE) acquisition that uses wave-controlled aliasing in parallel imaging (wave-CAIPI) encoding to retain high image quality.Significant acceleration of the MP-RAGE sequence is demonstrated using the wave-CAIPI technique. Here, sinusoidal waveforms are used to spread aliasing in all three directions to improve the g-factor. Combined with a rapid (2 s) coil sensitivity acquisition and data-driven trajectory calibration, we propose an online integrated acquisition-reconstruction pipeline for highly efficient MP-RAGE imaging.The 9-fold accelerated MP-RAGE acquisition can be performed in 71 s, with a maximum and average g-factor of gmax  = 1.27 and gavg  = 1.06 at 3T. Compared with the state-of-the-art method controlled aliasing in parallel imaging results in higher acceleration (2D-CAIPIRINHA), this is a factor of 4.6/1.4 improvement in gmax /gavg . In addition, we demonstrate a 57 s acquisition at 7T with 12-fold acceleration. This acquisition has a g-factor performance of gmax  = 1.15 and gavg  = 1.04.Wave encoding overcomes the g-factor noise amplification penalty and allows for an order of magnitude acceleration of MP-RAGE acquisitions. Magn Reson Med 79:401-406, 2018. © 2017 International Society for Magnetic Resonance in Medicine.
%F PUB:(DE-HGF)16
%9 Journal Article
%$ pmid:28220617
%2 pmc:PMC5563495
%R 10.1002/mrm.26649
%U https://inrepo02.dkfz.de/record/131733