Fig. 3
From: Parasagittal dural space and cerebrospinal fluid (CSF) flow across the lifespan in healthy adults
Illustration of cerebral aqueduct phase contrast flow acquisition. On the left, two curves representing the recorded CSF flow through the aqueduct of Sylvius over one arterial pulsatile cycle for a young adult (age = 22 years) and an older adult (age = 71 years). On the right, oblique axial and sagittal slices of T2-weighted MRI indicating the localization of the aqueduct of Sylvius. Due to high CSF flow through the aqueduct of Sylvius, the MR signal is dephased and appears hypointense on 3D T2-weighted MRI