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Differentiation of Transverse Sinus Thrombosis From Congenitally Atretic Cerebral Transverse Sinus with CT Stroke 43:1968-1970, Chik, Y.,et al, 2012 See this aricle in Pubmed Article Abstract Asymmetries of the sigmoid notches on noncontrast brain CT is a very sensitive and specific measure of differentiating transverse sinus thrombosis from an atretic transverse sinus when absence of transverse sinus flow is visualized on MR venography.

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