Abstract
ALTHOUGH the roentgen study of the heart is by no means new, recent developments in apparatus and technic are worthy of consideration and may be of interest to this gathering. Tables of normal cardiac silhouette measurements have been developed at the University of Wisconsin, and though this work has been published elsewhere2 they may profitably be referred to here. The area of the true frontal projection of the cardiac shadow, its transverse (and perhaps other) diameters, the proportionate length of the various sectors of the silhouette border cast by various portions of the heart are bits of information which can be used to great advantage by the cardiac diagnostician. After all, the physician percusses a heart to ascertain whether or not an hypertrophy or dilatation exists, and accuracy of observation here is as important as in the matter of temperature determinations. It is possible by a certain technic to measure the cardiac area very accurately indeed, and when carefully prepared normal tables are u...
Published Version
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