TY  - JOUR
AU  - Polak, Daniel
AU  - Setsompop, Kawin
AU  - Cauley, Stephen F
AU  - Gagoski, Borjan A
AU  - Bhat, Himanshu
AU  - Maier, Florian
AU  - Bachert, Peter
AU  - Wald, Lawrence L
AU  - Bilgic, Berkin
TI  - Wave-CAIPI for highly accelerated MP-RAGE imaging.
JO  - Magnetic resonance in medicine
VL  - 79
IS  - 1
SN  - 0740-3194
CY  - New York, NY [u.a.]
PB  - Wiley-Liss
M1  - DKFZ-2018-00039
SP  - 401 - 406
PY  - 2018
AB  - 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.
LB  - PUB:(DE-HGF)16
C6  - pmid:28220617
C2  - pmc:PMC5563495
DO  - DOI:10.1002/mrm.26649
UR  - https://inrepo02.dkfz.de/record/131733
ER  -