Abstract
CARDIAC roentgenography has two practical aspects, inspection under the fluoroscope and mensuration of the silhouette outlines. The former is mainly concerned with an examination of the great vessels, especially the aorta, although here also mensuration may be applied (1). The present communication is confined to a study of certain measurements of the cardiac silhouette and deals with a comparison of clinically normal hearts and those with organic disease. Methods Two general methods exist for obtaining an outline of the orthographic projection of the cardiac shadow, teleoroentgenography and orthodiagraphy. In the former a photographic record is obtained, in the latter a pencil outline of the shadow is made. P. C. Hodges (2) has shown that the two methods yield, as would be expected, the same result when the same general technic is used. The advantages of the teleoroentgeno-graphic method are the obtaining of a shadow free from possible subjective errors and the ease with which the record may be obtained ...
Published Version
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