Imaging biomarkers for detection and longitudinal monitoring of ventricular abnormalities from birth to childhood

Figure 5 Cella media index. Axial T2-weighted magnetic resonance imaging illustrating the Cella media index. It is calculated by dividing the biparietal cranial diameter (white arrow) by the maximum external diameter of the central portions of the lateral ventricles (yellow arrow). A: Normal Cella media index in a 6-year-old girl with absence seizures and headache; B: Increased Cella media index in a 3-year-old boy with hydrocephalus due to compression from an arachnoid cyst in the right cerebellopontine angle.