Table 1.

Summary of count data

Parameters	Measured value
Diameter of the beginning of the ICV	0.4-2.8 mm (1.49 ± 0.39 mm)
Diameter of the termination of the ICV	0.4-3.5 mm (2.05 ± 0.47 mm)
ICV length	28.5-47.9 mm (36.86 ± 3.74 mm)
Diameter of the termination of the LDV	0.5-2.1 mm (1.20 ± 0.40 mm)
Diameter of the termination of the BV	0.5-4.3 mm (1.65 ± 0.61 mm)
VG length	1.5-41.8 mm (9.30 ± 4.76 mm)
Width of the termination of the VG	0.8-6.8 mm (2.89 ± 1.07 mm)
Thickness of the termination of the VG	1.4-8.8 mm (3.75 ± 1.56 mm)
Width of the beginning of the SS	1.2-10 mm (5.55 ± 1.88 mm)
Thickness of the beginning of the SS	1.1-6.3 mm (3.08 ± 0.94 mm)
SS length	30.2-57.8 mm (43.6 ± 6.37 mm)
Angle at the VG and SS transition area	25.4-110.6° (77.2 ± 18.0°)

Abbreviations: BV, basal vein; ICV, internal cerebral vein; LDV, lateral direct vein; SS, straight sinus; VG, vein of Galen.