Evans Index (Ventricular Enlargement)
Evans Index (Ventricular Enlargement) - a deterministic tool in Sophie Well's Clinical Scoring & Risk group.
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What this is
Evans Index (Ventricular Enlargement) is one of 230 deterministic tools in Sophie Well's Clinical Scoring & Risk group. Evans Index (Ventricular Enlargement) - a deterministic tool in Sophie Well's Clinical Scoring & Risk group.
When to use it
Use this tool when you need a quick, citable reference. Every calculation runs entirely in your browser - no inputs leave your device, no account is required, no AI is involved. The site enforces a strict Content Security Policy and ships no analytics or third-party CDN.
References
Evans WA Jr. An encephalographic ratio for estimating ventricular enlargement and cerebral atrophy. Arch Neurol Psychiatry. 1942;47(6):931-937. (Modern radiologic threshold > 0.30: Frontiers Aging Neurosci. 2021;13:783092.) Read the source ↗
Worked example: Evans index 0.32 — ventricular enlargement (> 0.30 — radiologic hydrocephalus threshold).
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