Article Figures & Data
Figures
- Fig 1.
A, A 32-year-old man with a right parietal DAVF supplied by the right middle meningeal artery with venous drainage directly into the cortical veins (Cognard classification type III). On the native axial image of the SWAN sequence (A), brain arteries appeared bright (open arrows), whereas normal cerebral vein signal intensity was decreased (arrowheads). The SWAN sequence also revealed abnormal hyperintense parietal veins (arrows). B, A 32-year-old man with a right parietal DAVF supplied by the right middle meningeal artery with venous drainage directly into cortical veins (Cognard classification type III). With an oblique MIP reformation (B), this retrograde cortical venous drainage was easily detected. C, A 32-year-old man with a right parietal DAVF supplied by the right middle meningeal artery with venous drainage directly into the cortical veins (Cognard classification type III). The Sagittal MIP view of the 4D dynamic MR angiography (C) confirmed the early arterial phase filling of the abnormal parietal veins (arrows).
- Fig 2.
A, A 25-year-old man with a right petrous DAVF supplied by the right middle meningeal artery with retrograde cortical venous drainage and venous ectasia (Cognard classification type IV). On the native axial image of the SWAN sequence (A), the venous ectasia related to the right petrous DAVF appeared in hypersignal (arrow). B, A 25-year-old man with a right petrous DAVF supplied by the right middle meningeal artery with retrograde cortical venous drainage and venous ectasia (Cognard classification type IV). With the oblique MIP reformation of a TOF sequence (B), the petrous DAVF was visible (open arrow) as well as the venous ectasia (arrow). Note the TOF-related increased signal intensity due to the increased blood flow through the venous ectasia.
