Fig. 4
From: MRI CSF flowmetry in evaluation of different neurological diseases
Male patient aged 46 years old presented with headache axial T2 WI showing hydrocephalus. b 3D DRIVE image showing aqueductal web. c Sagittal phase image in systole showing no CSF flow in the aqueduct. d Velocity time curve showing markedly irregular CSF flow curve indicating irregular to and fro movement of the CSF proximal to the site of obstruction. Diagnosis is obstructive hydrocephalus caused by aqueductal web