Xiaoxia Guo1, Ying Gong2, Zhiyuan Wu1, Fuhua Yan3, Xiaoyi Ding4, Xueqin Xu5. 1. Department of Interventional Radiology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China. 2. Department of Radiology, Children's Hospital of Fudan University, Shanghai, 201102, China. 3. Department of Radiology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China. 4. Department of Interventional Radiology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China. dxy10456@rjh.com.cn. 5. Department of Radiology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China. xxq11550@rjh.com.cn.
Abstract
OBJECTIVES: To compare non-enhanced magnetic resonance angiography (NE-MRA) between 1.5 and 3.0-T using a balanced steady-state free precession (bSSFP) sequence in the assessment of renal artery stenosis (RAS) with digital subtraction angiography (DSA) as a reference standard. METHODS: From March 2016 to May 2018, 81 patients suspected to have significant RAS were scheduled for DSA. All patients underwent NE-MRA at either 1.5 T or 3.0 T randomly before DSA. In total, 49 patients underwent 1.5-T NE-MRA, and 32 patients underwent 3.0-T NE-MRA. Image quality was assessed. Degree of stenosis evaluated with NE-MRA was compared with that with DSA. RESULTS: NE-MRA provided excellent image qualities for segment 1 and segment 2 at 1.5 T and 3.0 T. Image qualities for segment 3 and segment 4 and the degree of renal artery branches were significantly higher at 3.0 T than at 1.5 T (p < 0.01). Stenoses evaluated with NE-MRA at 1.5 T (r = 0.853, p < 0.01) and 3.0 T (r = 0.811, p < 0.01) were highly correlated with those of DSA. The Bland-Altman plots showed overestimated degrees of stenosis at 1.5 T (mean bias, 3.5% ± 20.4) and 3.0 T (mean bias, 8.4% ± 21.7). The sensitivity and specificity for significant stenosis were 97.4% and 89.8% for 1.5 T and 95.7% and 91.1% for 3.0 T. CONCLUSIONS: Both 1.5-T and 3.0-T bSSFP NE-MRA can reliably assess RAS, with high image quality and good diagnostic accuracy. Performing NE-MRA at 3.0 T significantly improved visualization of renal artery branches but showed greater tendency to overestimate stenosis compared with that at 1.5 T. KEY POINTS: • Both 1.5-T and 3.0-T NE-MRA provide excellent image quality and good diagnostic accuracy for RAS. • NE-MRA at 3.0 T improved visualization of renal artery branches compared with that at 1.5 T.
OBJECTIVES: To compare non-enhanced magnetic resonance angiography (NE-MRA) between 1.5 and 3.0-T using a balanced steady-state free precession (bSSFP) sequence in the assessment of renal artery stenosis (RAS) with digital subtraction angiography (DSA) as a reference standard. METHODS: From March 2016 to May 2018, 81 patients suspected to have significant RAS were scheduled for DSA. All patients underwent NE-MRA at either 1.5 T or 3.0 T randomly before DSA. In total, 49 patients underwent 1.5-T NE-MRA, and 32 patients underwent 3.0-T NE-MRA. Image quality was assessed. Degree of stenosis evaluated with NE-MRA was compared with that with DSA. RESULTS: NE-MRA provided excellent image qualities for segment 1 and segment 2 at 1.5 T and 3.0 T. Image qualities for segment 3 and segment 4 and the degree of renal artery branches were significantly higher at 3.0 T than at 1.5 T (p < 0.01). Stenoses evaluated with NE-MRA at 1.5 T (r = 0.853, p < 0.01) and 3.0 T (r = 0.811, p < 0.01) were highly correlated with those of DSA. The Bland-Altman plots showed overestimated degrees of stenosis at 1.5 T (mean bias, 3.5% ± 20.4) and 3.0 T (mean bias, 8.4% ± 21.7). The sensitivity and specificity for significant stenosis were 97.4% and 89.8% for 1.5 T and 95.7% and 91.1% for 3.0 T. CONCLUSIONS: Both 1.5-T and 3.0-T bSSFP NE-MRA can reliably assess RAS, with high image quality and good diagnostic accuracy. Performing NE-MRA at 3.0 T significantly improved visualization of renal artery branches but showed greater tendency to overestimate stenosis compared with that at 1.5 T. KEY POINTS: • Both 1.5-T and 3.0-T NE-MRA provide excellent image quality and good diagnostic accuracy for RAS. • NE-MRA at 3.0 T improved visualization of renal artery branches compared with that at 1.5 T.
Entities:
Keywords:
Angiography, digital subtraction; Magnetic resonance angiography; Renal artery obstruction
Authors: R Kaatee; F J Beek; E E de Lange; M S van Leeuwen; H F Smits; P J van der Ven; J J Beutler; W P Mali Journal: Radiology Date: 1997-10 Impact factor: 11.105
Authors: T A Bley; C J François; M L Schiebler; O Wieben; N Takei; J H Brittain; A Munoz Del Rio; T M Grist; S B Reeder Journal: Eur Radiol Date: 2015-05-28 Impact factor: 5.315
Authors: Rolf Wyttenbach; Antonio Braghetti; Michael Wyss; Mario Alerci; Lukas Briner; Paolo Santini; Luca Cozzi; Marcello Di Valentino; Marcus Katoh; Claudio Marone; Peter Vock; Augusto Gallino Journal: Radiology Date: 2007-08-23 Impact factor: 11.105