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| Accuracy of three dimensional contrast enhanced MR angiography in diagnosis of renal artery stenosis |
| ZANG Xiu-juan, JU Rong-hui, LIU Hong-mei, SHAN Xiao-qing |
| General Hospital of Anshan Iron & Steel Company, Anshan Liaoning 114002, China |
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Abstract Objective: To assess the value of three dimensional contrast enhanced MR angiography(3D CE MRA) in the diagnosis of renal arterial stenosis. Methods: Forty patients suspected of renal arterial stenosis were examined by 3D CE MRA, 17 cases had DSA for comparison. All patients were injected with dimeglumine gadopentetate underwent three phases dynamic enhancement scanning by smart technology. The diagnosis was established on the basis of transverse section, multiplanar reconstruction(MPR), curved planar reformation(CPR), maximum intensity projection(MIP) and volume render(VR). Accessory renal arteries were also evaluated. Results: In the 40 cases, 80 renal arteries were clearly visualized by 3D CE MRA, 64 normal and 16 stenotic vessels. In the 17 cases with DSA, there were 19 normal, 15 stenotic vessels. The sensitivity, specificity, positive predictive value and negative predictive value of 3D CE MRA for diagnosis of renal arterial stenosis were 94.1%, 100.0%, 100.0%, and 95.5% respectively. Conclusion: 3D CE MRA was able to make a reliable diagnosis of renal arterial stenosis. 3D CE MRA should be the routine method of diagnosis of renal artery stenosis before invasive DSA in a large proportion of cases.
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Received: 19 March 2007
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2007, Vol. 18 
