Comparisons of Linear and Planimetric Indices as Estimators of Intraventricular Cerebrospinal Fluid Spaces (CSF) in Normal Autoptic Brains

In cranial computerized tomography (CT), a variety of linear and planimetric indices which render estimates of the volumes of the intraventricular fluid spaces of the living brain have been suggested. The validity of these indices, however, has received little interest (Reveley 1985). We were interested in the correlation of ventricular size indices with actual cerebrospinal fluid (CSF) volumes. Measurements were achieved using digital three-dimensional (3-D) analysis of postmortem brains, transformation of the data set to a standard reference system, and computer simulated CT slicing.