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Abstract #1647

The Capability of Contrast-enhanced T1-weighted MR Imaging for Quantifying Ivy Sign in Moyamoya Disease: compared with FLAIR

Liu-Xian Wang1, Hui Wang2, Jin-Hao Lyu1, Fang-Bin Hao2, Lian Duan2, and Xin Lou1
1The First Medical Center of Chinese PLA General Hospital, Beijing, China, 2The Fifth Medical Center of Chinese PLA General Hospital, Beijing, China

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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