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• Clinical Article •
Diagnostic value of time-spatial labeling inversion pulse (Time-SLIP) unenhanced MR angiography in renal artery
CAO Dai-rong  HUANG Hong-jie  ZHANG Yu-yang  GAO Xiao-jian  FENG Qi-jin 

DOI:10.12015/issn.1674-8034.2018.08.008.


[Abstract] Objective: To investigate the diagnostic value of non-contrast-enhanced magnetic resonance angiography (MRA) with time-spatial labeling inversion pulse (Time-SLIP) for the assessment of renal artery.Materials and Methods: Thirty-six patients in the suspicion of renal artery stenosis (RAS) were evaluated with Time-SLIP MRA using a 1.5 T scanner. The image quality and the degree of RAS in Time-SLIP MRA were evaluated. The results from Time-SLIP MRA images were compared with those from CTA or DSA.Results: Seventy-one renal arteries were included in the study. The image quality of MRA was scored as excellent in 72% (51 of 71), good in 24% (17 of 71) and poor in 3% (3 of 71) of patients. The sensitivity and specificity of Time-SLIP MRA for the detection of RAS were 100% and 98.2%, and for the detection of significant RAS (≥50%) were 90% and 98.4%. In quantitative assessments of the degree of RAS, the correlation between Time-SLIP MRA and CTA/DSA was excellent using Spearman rank-order correlation coefficient (r=0.959, P< 0.01). Time-SLIP MRA showed a slight overestimation of the degree of stenosis by the Bland-Altman plot [mean bias, (3.31±10.04)%].Conclusions: Time-SLIP MRA is an accurate method for assessment of renal artery.
[Keywords] Time-spatial labeling inversion pulse；Magnetic resonance imaging；Renal artery；Magnetic resonance angiography；Computed tomography angiography

CAO Dai-rong* Department of Radiology, the First Affiliated Hospital of Fujian Medical University, Fuzhou 350005, China

HUANG Hong-jie Department of Radiology, the First Affiliated Hospital of Fujian Medical University, Fuzhou 350005, China

ZHANG Yu-yang Department of Radiology, the First Affiliated Hospital of Fujian Medical University, Fuzhou 350005, China

GAO Xiao-jian Department of Radiology, the First Affiliated Hospital of Fujian Medical University, Fuzhou 350005, China

FENG Qi-jin Department of Radiology, the First Affiliated Hospital of Fujian Medical University, Fuzhou 350005, China

*Correspondence to: Cao DR, E-mail: dairongcao@163.com

Conflicts of interest   None.

ACKNOWLEDGMENTS  This work was part of Medical Innovation Project of Fujian Province No. 2015-CX-25
Received  2018-02-13
Accepted  2018-04-24
DOI: 10.12015/issn.1674-8034.2018.08.008
DOI:10.12015/issn.1674-8034.2018.08.008.

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