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• Technical Article •
A comparative study on the effects of 3D mDixon sequence and 3D Vane sequence on liver imaging by combining the Compressed SENSE technology and SENSE
WEI Qiang  WANG Jiazheng  YI Dongna  XU Xiaofang  SONG Qingwei  PU Renwang  CHEN Lihua  ZHANG Yu  LIU Ailian 

Cite this article as: Wei Q, Wang JZ, Yi DN, et al. A comparative study on the effects of 3D mDixon sequence and 3D Vane sequence on liver imaging by combining the Compressed SENSE technology and SENSE. Chin J Magn Reson Imaging, 2020, 11(9): 781-785. DOI:10.12015/issn.1674-8034.2020.09.012.


[Abstract] Objective: To compare the application value of 3D mDixon sequence and 3D Vane sequence of compressed sense technology in liver examination.Materials and Methods: Twenty-three healthy volunteers (13 males and 10 females) were included, who underwent upper abdominal MRI scanning using free breathing 3D Vane, 3D mDixon SENSE and 3D mDixon Compressed SENSE (CS) sequences in the 3.0 T MR scanner. According to the above technologies, they were divided into A, B and C groups. Two observers separately scored the subjective score of liver image quality on a 5-point scale. The regions of interest were placed on the anterior and posterior segments of the right hepatic lobe, the inner and outer segments of the left hepatic lobe, and the right erector spinae. The signal (SI) and standard deviation (SD) values of the liver and erector spinae were measured, and the signal to noise ratio (SNR) and contrast to noise ratio (CNR) were calculated. The Wilcoxon test and the Chi-square test were used to analyze the SNR, CNR, and image quality scores of the anterior and posterior segments of the right liver lobe and the inner and outer segments of the left hepatic lobe of the three groups.Results: The objective measurement data and the subjective image quality scores of the images of group A, B and C by the two observers were in good agreement (all Kappa and ICC values were more than 0.75). Image quality scores in three groups were 4.3±0.56, 4.7±0.56, and 4.7±0.56, respectively. The image quality scores in group B and C were significantly higher than those in group A (P<0.05). The SNR and CNR of the anterior and posterior segments of the right hepatic lobe and the inner and outer segments of the left hepatic lobe were 8.03±3.08, 29.25±7.08, 29.25±7.08, 8.03±3.08; 15.75±5.37, 43.89±10.30, 40.27±12.49, 11.37±5.42; 16.95±5.48, 46.55±10.47, 46.56±10.48, 16.95±5.48, respectively. And the SNR and CNR in the anterior and posterior segments of the right hepatic lobe in group B and C were significantly higher than those in group A (P<0.05). SNR and CNR in the left lobe of the liver in group C were also significantly higher than those in group A (P<0.05). There were no statistically significant differences in the quality scores, SNR and CNR between groups B and C (P>0.05). The scanning time of 3D Vane is 111 s; Compared with 3D mDixon SENSE sequence, the scanning time of 3D mDixon CS sequence was shortened by about 15.3% (15.1 s vs. 13.1 s).Conclusions: Compared with free-breathing 3D Vane sequences, breath-holding 3D mDixon SENSE and 3D mDixon CS sequences can effectively improve the SNR and contrast noise of images.
[Keywords] 3D mDixon；compressed sense；liver；signal to noise ratio；contrast noise ratio

WEI Qiang Department of Radiology, the First Affiliated Hospital of Dalian Medical University, Dalian 116011, China

WANG Jiazheng Philips Healthy (China), Suzhou 215000, China

YI Dongna Department of Radiology, the First Affiliated Hospital of Dalian Medical University, Dalian 116011, China

XU Xiaofang Philips Healthy (China), Suzhou 215000, China

SONG Qingwei Department of Radiology, the First Affiliated Hospital of Dalian Medical University, Dalian 116011, China

PU Renwang Department of Radiology, the First Affiliated Hospital of Dalian Medical University, Dalian 116011, China

CHEN Lihua Department of Radiology, the First Affiliated Hospital of Dalian Medical University, Dalian 116011, China

ZHANG Yu Department of Radiology, the First Affiliated Hospital of Dalian Medical University, Dalian 116011, China

LIU Ailian* Department of Radiology, the First Affiliated Hospital of Dalian Medical University, Dalian 116011, China

*Correspondence to: Liu AL, E-mail: cjr.liuailian@vip.163.com

Conflicts of interest   None.

Received  2020-05-06
Accepted  2020-07-18
DOI: 10.12015/issn.1674-8034.2020.09.012
Cite this article as: Wei Q, Wang JZ, Yi DN, et al. A comparative study on the effects of 3D mDixon sequence and 3D Vane sequence on liver imaging by combining the Compressed SENSE technology and SENSE. Chin J Magn Reson Imaging, 2020, 11(9): 781-785. DOI:10.12015/issn.1674-8034.2020.09.012.

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