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Figure 2b. Normal sinovenous anatomy. (a, b) Axial MIP CT image (a) and 3D volume-rendered image from CT venography (oblique anterosuperior view) (b) show the internal cerebral veins (ICV), basal veins of Rosenthal (BVR), vein of Galen (VOG), and straight sinus (StrS). On the volume-rendered image, note the asymmetric appearance of the torcular herophili (TH), which is formed by the union of the superior sagittal sinus (SSS), straight sinus, and transverse sinuses (TS). The volume-rendered image also shows the sigmoid sinus (SS) and superficial middle cerebral vein (SMCV). (c) Sagittal MIP CT image shows the inferior sagittal sinus (ISS), as well as the internal cerebral vein, superior sagittal sinus, straight sinus, and vein of Galen.
