Ultrasound Assessment of the Third Ventricle Diameter: Agreement With CT Results in the Pediatric Population

TUS provides reproducible bedside measurements of third ventricle diameter in children, with good agreement compared with CT in patients without midline shift or major surgical alterations. While not a substitute for comprehensive neuroimaging, TUS may serve as a nonirradiating adjunct for serial ventricular monitoring, particularly for monitoring for the development of hydrocephalus and during external ventricular drain management. Further research should evaluate interoperator reproducibility, applicability in patients with mass effect, and integration into clinical workflows.