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NEUROLOGY 1976;26:231
© 1976 American Academy of Neurology

Comparing Evans' index and computerized axial tomography in assessing relationship of ventricular size to brain size

V. SYNEK, M.D., J. R. REUBEN, M.B., Ch.B. and G. H. DU BOULAY, M.B., F.R.C.P., F.F.R.

From the Lysholm Radiological Department, The National Hospital, Queen Square, London, WC1N 3BG.

Using pneumoencephalography and computerized axial tomography (EMI scanning) Polaroid® pictures, the relationship between ventricular size and cerebral size was investigated in 35 patients. Evans' index was used for pneumoencephalograms, and planimetric measurement of the ventricular and cerebral cross-sectional areas was used for EMI scanning. The percentage ratio for the latter technique is termed VBR. The correlation coefficient between the two methods was 0.9510 (p < 0.001).

Requests for reprints should be addressed to Dr. Synek, Department of Clinical Neurophysiology, Sahlgren Hospital, Göteborg, Sweden.

Received for publication May 30, 1975.




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