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Fig 3. Dural arteriovenous fistula at superior sagittal sinus in a 70-year-old man (case 9).
A, T2-weighted image shows late subacute subcortical hematoma in the parietal lobe.
B, Venous phase of right common carotid angiogram depicts retrograde cortical venous drainage (RCVD) with occlusion of posterior part of superior sagittal sinus.
C, Venous phase of left common carotid angiogram also depicts RCVD with occlusion of posterior part of superior sagittal sinus.
D, Color overlay of relative cerebral blood volume (rCBV) map shows marked increase of CBV in the hemispheres bilaterally. The extent of increase of CBV is larger in the right hemisphere than in the left hemisphere (mean rCBV ratio, 1.37; however, the rCBV ratio may be underestimated because of the bilateral affected hemispheres).
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