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Heart Size From Routine Chest Films.

P. Hodges
Published 1946 · Medicine

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Roentgen ray determination of the size of the human heart may be extremely precise if one employs sufficiently refined technics, such as those for volume, or a mere approximation if the subjects have heart disease and the criterion of size is the transverse diameter of the frontal plane silhouette. Estimation of frontal plane area from orthodiagrams or from specially made films constitutes a practical compromise between these two extremes, and tables and equations have been developed for predicted normal area from height and weight. The general radiologist faces daily the task of passing judgment on the shape and size of the hearts that he sees in routine chest films. In our laboratory such films invariably are stereoscopic and are accompanied by a record of the patient's height, weight, and anteroposterior chest diameter. Exposure times range from 1/30th of a second to 1/10th of a second, depending on the thickness of the chest, and there is no attempt to synchronize exposures with a particular point in ...

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