Referenceless one-dimensional Nyquist ghost correction in multicoil single-shot spatiotemporally encoded MRI

Chen, Ying; Zhong, Jianhui; Shah, Nadim Joni; Liao, Yupeng; Chen, Zhong; Liu, Hui; Yun, Seong Dae; Yuan, Lisha

doi:10.1016/j.mri.2016.11.024

Journal Article

FZJ-2017-02397

Referenceless one-dimensional Nyquist ghost correction in multicoil single-shot spatiotemporally encoded MRI

Chen, Y. ; Liao, Y.FZJ* ; Yuan, L. ; Liu, H. ; Yun, S. D.FZJ* ; Shah, N. J.FZJ* ; Chen, Z. ; Zhong, J. (Corresponding author)

2017
Elsevier Science Amsterdam [u.a.]

Magnetic resonance imaging 37, 222 - 233 (2017) [10.1016/j.mri.2016.11.024]

This record in other databases:

Please use a persistent id in citations: doi:10.1016/j.mri.2016.11.024

Abstract: 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

Classification: