Previous study has reported superiority of contrast-enhanced T1-weighted MR (CEMR) imaging compared with FLAIR for depicting ivy sign in Moyamoya disease (MMD), but no quantitative comparison of both scoring modalities was performed. In this study, we found better consistency between CEMR and DSA, higher ability of CEMR to differentiate severity of MCA stenosis, as well as higher specificity of CEMR compared with FLAIR. Our study proposed that for chronic cerebrovascular disease like MMD, CEMR might be more appropriate in assessing leptomeningeal collaterals.
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