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FIG 3. Images in a 46-year-old patient with left parasagittal meningioma.
A, Real-time para-axial MIP image with 30-mm thickness shows occlusion (open arrow) of the superior sagittal sinus by the tumor, which has lower signal intensity compared with that of the sinus. Note the extensive collateral cortical veins (solid arrows) draining the frontal part of the sinus.
B, Venous-phase DSA obtained with an injection in the left common carotid artery shows occlusion of the sinus (solid arrow) and prominent frontal collateral cortical veins (open arrow).
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