Comparison Between Ultrasound and Magnetic Resonance Imaging Measurements of the Optic Nerve Sheath Diameter in Patients Undergoing Intracranial Surgery: Prospective Observational Single-Center Study.

JMIR Perioper Med · 2026 · PMC13089628 · PMID 41996532

Europe PMC DOI

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highly significantP <.001actually significant

Statistical analysis suggested a strong positive correlation between US and RAD measurements for both eyes, with correlation coefficients of 0.78 (right eye, Spearman) and 0.84 (left eye, Pearson), both highly significant ( P <.001).

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