title: The Evans ratio for ventricular size: a calculation error.
abstract: The suggestion that the Evans ratio, the ratio of the transverse diameter of the anterior horns of the lateral ventricles to the internal diameter of the skull, was a more significant quantity than the ventricular measurement alone was based on a calculation error. The value of this ratio and other such ratios involving linear skull measurements is unproven.
mesh_terms: D002508:Cephalometry; D002552:Cerebral Ventricles / Q000033:anatomy & histology*; D006801:Humans; D008433:Mathematics