非对比增强磁共振血管成像联合肾动态显像对动脉粥样硬化性肾动脉狭窄的诊断价值OACSTPCD

Aim:To explore the diagnostic value of non-contrast enhanced magnetic resonance angiography(NCE-MRA)combined with renal dynamic imaging in atherosclerotic renal artery stenosis(ARAS).Methods:A total of 172 pa-tients who underwent renal artery digital subtraction angiography(DSA)in Henan University People's Hospital(Henan Pro-vincial People's Hospital)from January 2019 to January 2023 were selected and allocated into ARAS group(n =107)and non-ARAS group(n =65).Clinical characteristics of the2 groups and the diagnostic value of NCE-MRA for ARAS were an-alyzed.ROC curve was drawn with the ratio and difference of bilateral GFR measured by renal dynamic imaging and the combination of them and NCE-MRA diagnostic results to evaluate their diagnostic value for ARAS.Results:NCE-MRA and DSA were in good agreement in diagnosing ARAS(Kappa =0.828,P<0.01).The sensitivity,specificity,accuracy,positive predictive value(PPV)and negative predictive value(NPV)of NCE-MRA for diagnosing ARAS were 92.52%,90.77%,91.86%,94.29%,and 88.06%,respectively;the area under the ROC curve of the ratio and difference of bilateral GFR for diagnosing ARAS were 0.771 and 0.708,and the optimal diagnostic margins were 1.371 and 13.900 mL/(min·1.73 m2),the sensitive was 52.3%and 45.8%,and the specificity was 90.8%and 89.2%.The area under the ROC curve of the ratio and difference of bilateral GFR combined with NCE-MRA for diagnosing ARAS was 0.948 and 0.942,respective-ly,the sensitivity was 95.3%,94.4%,the specificity was 89.2%.Conclusion:NCE-MRA has high diagnostic efficiency for ARAS.Combination with GFR measured by renal dynamic imaging can improve the diagnostic efficiency of NCE-MRA for ARAS.