Abstract: Introduction: The term hydrocephalus literally means “water in the brain” and in this condition, excess fluid accumulates in the brain resulting in dilatation of the ventricles. It results from imbalance between cerebrospinal fluid (CSF) production and absorption. The extent of ventricular dilatation and brain compression in hydrocephalus in children is often significant and if untreated can lead to complications such as blindness and mental defiency. Therefore assessment of cerebral ventricular size is essential in the clinical management of hydrocephalus.