Table 2.

Stroke volume (μL/min) and velocity amplitude (VA) (cm/s) on 4D flow MRI and f (%) on IVIM MRI

Region of interest	Stroke volume (μL/min)	VA (cm/s)	f (%)
Foramen magnum, mean ± SD	237 ± 145	1.33 ± 0.61	70.2 ± 16.6
(Range)	(40–1100)	(0.20–4.85)	(9.2–94.6)
Prepontine cistern, mean ± SD	162 ± 104	1.27 ± 0.72	87.3 ± 4.5
(Range)	(20–600)	(0.27–6.37)	(65.9–95.4)
Foramen of Magendie, mean ± SD	27.2 ± 23.3	0.49 ± 0.32	76.4 ± 8.4
(Range)	(0–150)	(0.10–2.14)	(36.6–93.4)
Lower part of cerebral aqueduct, mean ± SD	33.0 ± 29.6	0.78 ± 0.50	75.6 ± 7.5
(Range)	(0–220)	(0.14–3.40)	(45.5–89.9)
Upper part of cerebral aqueduct, mean ± SD	32.0 ± 35.2	0.94 ± 0.70	71.2 ± 11.1
(Range)	(0–170)	(0.07–3.53)	(30.6–89.7)
Left foramen of Monro, mean ± SD	34.3 ± 34.0	0.48 ± 0.26	74.7 ± 12.9
(Range)	(0–220)	(0.07–1.56)	(29.9–92.8)
Right foramen of Monro, mean ± SD	29.1 ± 24.7	0.41 ± 0.26	72.8 ± 14.2
(Range)	(0–120)	(0.05–1.67)	(8.6–92.5)