A and B, Venous phase of a conventional intra-arterial catheter angiogram clearly shows flow within the nondominant transverse sinus (A, arrow), whereas.

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Presentation transcript:

A and B, Venous phase of a conventional intra-arterial catheter angiogram clearly shows flow within the nondominant transverse sinus (A, arrow), whereas corresponding MR venogram (B) shows a flow gap. A and B, Venous phase of a conventional intra-arterial catheter angiogram clearly shows flow within the nondominant transverse sinus (A, arrow), whereas corresponding MR venogram (B) shows a flow gap R. H. Ayanzen et al. AJNR Am J Neuroradiol 2000;21:74-78 ©2000 by American Society of Neuroradiology