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. 2021 Feb 6;18(7):1699–1710. doi: 10.7150/ijms.54891

Figure 3.

Figure 3

The ICV and BV and their draining characteristics into the VG and SS. A, CTA shows that the bilateral ICVs merge into one trunk (asterisk) before draining into the VG. B, CTA shows that the bilateral ICVs (asterisk) and BVs (arrowhead) drain into the VG. C, CTA shows that the ipsilateral ICV and BV merge into one trunk (asterisk) before draining into the VG. D, CTA and MIP show that the left ICV is absent. E, CTA and MIP show that the right ICV (arrowhead) is dysplastic. F, CTA and MIP show that the bilateral BVs are well developed. G, CTA and MIP show that the right BV is dysplastic (asterisk). H, CTA and MIP show that the left BV drains directly into the SS (asterisk). Abbreviations: BV, basal vein; CTA, computed tomography angiography; ICV, internal cerebral vein; ISS, inferior sagittal sinus; MIP, maximum intensity projection; O-I, outside to inside; S-I, superior to inferior; SS, straight sinus; TSV, thalamostriate vein; L, left; R, right; VG, vein of Galen.