Fig. 1
From: Phase-contrast magnetic resonance imaging in evaluation of hydrocephalus in pediatric patients
A–E A 6-year-old female child with headache and persistent vomiting. A Axial T2W image shows mild-to-moderate supratentorial ventricular dilation, B sagittal T2 DIVER image reveals absent flow void at aqueduct of Sylvius which is obstructed by aqueductal web (white arrow). C, D Sagittal phase-contrast images reveal no CSF flow through the aqueduct at systole (C) and diastole (D) (black arrows), and E velocity time curve- and CSF flow curve-associated table reveals irregular CSF flow curve indicating irregular to and fro movement of the CSF proximal to the site of obstruction with PSV: 0.8 cm/s, PDV:1.02 cm/s, and MV: 0.4 cm/s (hypodynamic CSF circulation with low CSF velocities and no flow through aqueduct of Sylvius obstructive hydrocephalus due to aqueductal web)