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• Clinical Article •
Non-contrast-enhanced MR angiography for evaluation renal artery stenosis: comparison with CT angiography
WANG Xuan  ZHAO Xin-zhi  XUE Hua-dan  LIU Meng-yu  JIN Zheng-yu 

DOI:10.3969/j.issn.1674-8034.2013.04.001.


[Abstract] Objective: To explore the application of non-contrast-enhanced magnetic resonance angiography (MRA) with time-spatial labeling inversion pulse (Time-SLIP) for assessment of renal artery stenosis (RAS) comparing with computer tomography angiography (CTA).Materials and Methods: Twenty-two patients [12 men and 10 women, mean age: (47.4±9.2) years] in the suspicion of RAS were evaluated with MRA and CTA in the same period. Coronal and axial true steady-state free-precession (SSFP) sequences with Time-SLIP technique were performed on a 1.5 T MRI system for MRA imaging. Image quality and grade of RAS were evaluated. The Unenhanced-MRA images were compared against CTA results.Results: Forty-six renal arteries were included in the statistical analysis. Image quality of MRA was excellent in 63% (29 of 46), good in 28% (13 of 46) and moderate in 9% (four of 46) of patients. The agreement between Time-SLIP MRA and CTA assessments for RAS grading was excellent, with a Spearman rank-order correlation coefficient (r) of 0.991 (P<0.01). The sensitivity and specificity of non-enhanced-MRA for the detection of significant RAS (≥50%) were 100% and 97.1% using CTA as the gold standard.Conclusion: Non-contrast-enhanced MRA with Time-SLIP is an appropriate method for assessment of renal artery stenosis.
[Keywords] Magnetic resonance angiography；Renal artery obstruction；Tomography, X-ray computed

WANG Xuan Departments of Radiology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences, Beijing 100730, China

ZHAO Xin-zhi Departments of Radiology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences, Beijing 100730, China

XUE Hua-dan* Departments of Radiology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences, Beijing 100730, China

LIU Meng-yu Departments of Radiology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences, Beijing 100730, China

JIN Zheng-yu Departments of Radiology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences, Beijing 100730, China

*Correspondence to: Xue HD, E-mail: bjdanna95@hotmail.com

Conflicts of interest   None.

Received  2012-10-16
Accepted  2012-11-25
DOI: 10.3969/j.issn.1674-8034.2013.04.001
DOI:10.3969/j.issn.1674-8034.2013.04.001.

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