High-resolution in vivo diffusion imaging of the human brain with generalized slice dithered enhanced resolution: Simultaneous multislice (gSlider-SMS)

被引:116
作者
Setsompop, Kawin [1 ,2 ]
Fan, Qiuyun [1 ,2 ]
Stockmann, Jason [1 ,2 ]
Bilgic, Berkin [1 ,2 ]
Huang, Susie [1 ,2 ]
Cauley, Stephen F. [1 ,2 ]
Nummenmaa, Aapo [1 ,2 ]
Wang, Fuyixue [1 ,3 ]
Rathi, Yogesh [4 ]
Witzel, Thomas [1 ,2 ]
Wald, Lawrence L. [1 ,2 ]
机构
[1] Massachusetts Gen Hosp, Athinoula A Martinos Ctr Biomed Imaging, Bldg 75,Room 2-102,13th St, Charlestown, MA 02129 USA
[2] Harvard Med Sch, Dept Radiol, Boston, MA USA
[3] Harvard Div Hlth Sci & Technol, Med Engn & Med Phys, Cambridge, MA USA
[4] Harvard Med Sch, Brigham & Womens Hosp, Dept Psychiat, Psychiat Neuroimaging Lab, Boston, MA USA
关键词
diffusion imaging; simultaneous multislice; slice encoding; simultaneous multislab; NOISE RATIO EFFICIENCY; K-SPACE; 7; TESLA; MRI; SIGNAL; EPI; WHOLE; ARTIFACTS; TIME;
D O I
10.1002/mrm.26653
中图分类号
R8 [特种医学]; R445 [影像诊断学];
学科分类号
1002 ; 100207 ; 1009 ;
摘要
PurposeTo develop an efficient acquisition for high-resolution diffusion imaging and allow in vivo whole-brain acquisitions at 600- to 700-m isotropic resolution. MethodsWe combine blipped-controlled aliasing in parallel imaging simultaneous multislice (SMS) with a novel slab radiofrequency (RF) encoding gSlider (generalized slice-dithered enhanced resolution) to form a signal-to-noise ratio-efficient volumetric simultaneous multislab acquisition. Here, multiple thin slabs are acquired simultaneously with controlled aliasing, and unaliased with parallel imaging. To achieve high resolution in the slice direction, the slab is volumetrically encoded using RF encoding with a scheme similar to Hadamard encoding. However, with gSlider, the RF-encoding bases are specifically designed to be highly independent and provide high image signal-to-noise ratio in each slab acquisition to enable self-navigation of the diffusion's phase corruption. Finally, the method is combined with zoomed imaging (while retaining whole-brain coverage) to facilitate low-distortion single-shot in-plane encoding with echo-planar imaging at high resolution. ResultsA 10-slices-per-shot gSlider-SMS acquisition was used to acquire whole-brain data at 660 and 760 m isotropic resolution with b-values of 1500 and 1800 s/mm(2), respectively. Data were acquired on the Connectome 3 Tesla scanner with 64-channel head coil. High-quality data with excellent contrast were achieved at these resolutions, which enable the visualization of fine-scale structures. ConclusionsThe gSlider-SMS approach provides a new, efficient way to acquire high-resolution diffusion data. Magn Reson Med 79:141-151, 2018. (c) 2017 International Society for Magnetic Resonance in Medicine.
引用
收藏
页码:141 / 151
页数:11
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