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• Technical Article •
Feasibility study on application of MAGiC sequence in sacroiliac joint of young volunteers
ZHAN Yingying  JIANG Yunping  ZHANG Ke  LI Wenjuan  PAN Jielin  FANG Yijie  LI Shaolin  HONG Guobin 

Cite this article as: Zhan YY, Jiang YP, Zhang K, et al. Feasibility study on application of MAGiC sequence in sacroiliac joint of young volunteers. Chin J Magn Reson Imaging, 2020, 11(7): 568-572. DOI:10.12015/issn.1674-8034.2020.07.018.


[Abstract] Objective: To explore the feasibility of applying magnetic resonance image compilation (MAGiC) sequence to MR examination of sacroiliac joint in young volunteers.Materials and Methods: All participants (14 male, 16 female) underwent conventional sequences and MAGiC sequence scanning. Image quality, atifacts, the signal to noise ratio (SNR) and the carrier to noise ratio (CNR) were assessed independently by two observers (a radiologist and a radiologic technologist) on both conventional sequences (T1WI-FSE, T2WI-FSE, STIR) and MAGiC sequences (T1WI, T2WI, STIR). Kappa (K) statistic was used to evaluate the consistency of observers. T2 value of subchondral bone were measured on MAGiC T2-mapping images.Results: Thirty young volunteers were performed MR examination (60 sacroiliac joints included). The image quality scores of conventional sequences T1WI, T2WI and STIR were 5 (0), 5 (0) and 5 (0), which of MAGiC reconstruction sequences were 5 (1), 5 (1) and 3 (2), with statistically significant differences (P<0.05). The consistency check between observers showed K> 0.61. The SNR of T1WI sequence and MAGiC T1WI sequence were 12.61±0.37, 13.96±0.52 (t=-2.63, P< 0.05), the CNR of two sequences were 1.06±0.04, 1.18±0.28 (Z=-2.373, P<0.05). The SNR of T2WI sequence and MAGiC T2WI sequence were 12.84±0.48, 112.63±0.45 (t=0.447, P>0.05), the CNR of two sequences were 1.57±0.05, 1.54 (0.03)(Z=-1.486, P>0.05). The SNR of STIR sequence and MAGiC STIR sequence were 8.36 (3.77), 5.73±0.52 (Z=-3.19, P<0.05), the CNR of two sequences were-1.9 (10.29), 0.95±0.08 (Z=-1.46, P>0.05). There was no statistical difference of artifact score between conventional sequences and MAGiC sequences [conventional sequences: 50 cases (83.3%, grade 1), 8 cases (13.3%, grade 2), 2 cases (3.3%, grade 3). MAGiC sequences: 34 cases (56.6%, grade 1), 18 cases (30%, grade 2), 8 cases (13.3%, grade 3), Z=-4.443, P<0.001]. The mean T2 value was (83±8) ms, and the iliac side was slightly higher than sacral side (P<0.05).Conclusions: Though the subjective image quality score of MAGiC sequence images are slightly lower than conventional sequences images, but with higher SNR and CNR, shorter scanning time, more quantitative parameters, MAGiC sequence can be used for MR examination of sacroiliac joint in young volunteers.
[Keywords] magnetic resonance imaging；sacroiliac joint；diagnostic techniques and procedures

ZHAN Yingying Department of Radiology, Fifth Affiliated Hospital, SUN Yat-Sen University, Zhuhai 519000, China

JIANG Yunping Department of Radiology, Fifth Affiliated Hospital, SUN Yat-Sen University, Zhuhai 519000, China

ZHANG Ke Department of Radiology, Fifth Affiliated Hospital, SUN Yat-Sen University, Zhuhai 519000, China

LI Wenjuan Department of Radiology, Fifth Affiliated Hospital, SUN Yat-Sen University, Zhuhai 519000, China

PAN Jielin Department of Radiology, Fifth Affiliated Hospital, SUN Yat-Sen University, Zhuhai 519000, China

FANG Yijie Department of Radiology, Fifth Affiliated Hospital, SUN Yat-Sen University, Zhuhai 519000, China

LI Shaolin Department of Radiology, Fifth Affiliated Hospital, SUN Yat-Sen University, Zhuhai 519000, China

HONG Guobin* Department of Radiology, Fifth Affiliated Hospital, SUN Yat-Sen University, Zhuhai 519000, China

*Correspondence to: Hong GB, E-mail: honggb@mail.sysu.edu.cn

Conflicts of interest   None.

Received  2020-02-28
Accepted  2020-05-21
DOI: 10.12015/issn.1674-8034.2020.07.018
Cite this article as: Zhan YY, Jiang YP, Zhang K, et al. Feasibility study on application of MAGiC sequence in sacroiliac joint of young volunteers. Chin J Magn Reson Imaging, 2020, 11(7): 568-572. DOI:10.12015/issn.1674-8034.2020.07.018.

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