REFERENCES
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- Hanson, J. S.: Radiologic estimation of heart volume. J.A.M.A. 176: 16–18, 1961.
- Hodges, P. C.: Heart size from routine chest films. Radiology 47: 355–359 (October) 1946.
- Schwarz, G. S.: Determination of frontal plane area from the product of the long and short diameters of the cardiac silhouette. Ibid.,3 pp. 360–370.
- Meyer, R. R.: Heart measurement. Radiology 52: 691–700 (May) 1949.
- Danzer, C. S.: The cardiothoracic ratio—an index of cardiac enlargement. Am. J. M. Sc. 157: 513, 1919.