TY  - JOUR
AU  - Chen, Ying
AU  - Liao, Yupeng
AU  - Yuan, Lisha
AU  - Liu, Hui
AU  - Yun, Seong Dae
AU  - Shah, Nadim Joni
AU  - Chen, Zhong
AU  - Zhong, Jianhui
TI  - Referenceless one-dimensional Nyquist ghost correction in multicoil single-shot spatiotemporally encoded MRI
JO  - Magnetic resonance imaging
VL  - 37
SN  - 0730-725X
CY  - Amsterdam [u.a.]
PB  - Elsevier Science
M1  - FZJ-2017-02397
SP  - 222 - 233
PY  - 2017
AB  - Single-shot spatiotemporally encoded (SPEN) MRI is a novel fast imaging method capable of retaining the time efficiency of single-shot echo planar imaging (EPI) but with distortion artifacts significantly reduced. Akin to EPI, the phase inconsistencies between mismatched even and odd echoes also result in the so-called Nyquist ghosts. However, the characteristic of the SPEN signals provides the possibility of obtaining ghost-free images directly from even and odd echoes respectively, without acquiring additional reference scans. In this paper, a theoretical analysis of the Nyquist ghosts manifested in single-shot SPEN MRI is presented, a one-dimensional correction scheme is put forward capable of maintaining definition of image features without blurring when the phase inconsistency along SPEN encoding direction is negligible, and a technique is introduced for convenient and robust correction of data from multi-channel receiver coils. The effectiveness of the proposed processing pipeline is validated by a series of experiments conducted on simulation data, in vivo rats and healthy human brains. The robustness of the method is further verified by implementing distortion correction on ghost corrected data
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000396382200031
C6  - pmid:27916658
DO  - DOI:10.1016/j.mri.2016.11.024
UR  - https://juser.fz-juelich.de/record/828436
ER  -