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- W2383009791 abstract "Objective To evaluate the consistency between 3D time-of-flight MR angiography(3D TOF MRA)and DSA for assessment basilar artery stenosis.Methods 70 patients[40 men and 30 women,mean age(64.77±9.40)years] were retrospectively evaluated with 3D TOF MRA and DSA.The quality of 3D TOF MRA images was visually evaluated.The degree of stenosis was assessed on source image and the degree of stenosis≥50% was identified as relevant.Statistical tests were performed with MEDCALC 12.0 software.The degree of stenosis was compared between 3D TOF MRA source images and DSA images by using the Wilcoxon signed-rank test;correlation between images from both modalities was calculated as the Spearman rank-order correlation coefficient.The consistency of stenosis between the two modalities was evaluated by Bland-Altman method.Sensitivity,specificity,positive likelihood ratio,negative likelihood ratio,disease prevalence,positive predictive value,negative predictive value for detection of significant basilar artery stenosis by using 3D TOF MRA were calculated.ROC curve was calculated.Results Diagnostic images were successfully obtained in all patients.3D TOF MRA image quality was good in 59 and moderate in 11 patients.DSA image was good in all patients.38 basilar arteries were relevant stenosis on MRA whereas 35 arteries were relevant stenosis on DSA.The degree of basilar artery stenosis was(52.57±22.79)% on MRI and(51.84±23.20)% on DSA and there was no significant difference(P=0.152).The stenosis measurements of 3D TOF MRA were highly correlated(r=0.985,P0.001)with DSA results.Bland-Altman plot showed that the two modalities were in good consistency in evaluating the degree of stenosis and 95.71%(67/70)scatters were in the limits of agreement.The sensitivity,specificity,positive likelihood ratio,negative likelihood ratio,disease prevalence,positive predictive value and negative predictive value of 3D TOF MRA relative to DSA for the diagnosis of a relevant stenosis were 94.29%,85.71%,6.6,0.07,50.00%,86.84% and 93.75%,respectively.The area under the ROC curve is 0.9(95% CI 0.805 to 0.959,P0.001).Conclusions 3D TOF MRA and DSA are in good consistency for assessment of basilar artery stenosis." @default.
- W2383009791 created "2016-06-24" @default.
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- W2383009791 date "2012-01-01" @default.
- W2383009791 modified "2023-09-23" @default.
- W2383009791 title "Consistency between 3D TOF MRA and DSA in evaluating basilar artery stenosis" @default.
- W2383009791 hasPublicationYear "2012" @default.
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