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The author describes the technic of recording orthodiagrams and the apparatus necessary. The normal cardiac silhouette is depicted and in subsequent chapters alterations from normal in size and silhouette due to the various diseases of the heart are discussed. The author's observations indicate that the method of determining the frontal area of the heart described by Hodges and Eyster gives the most reliable evidence of cardiac enlargement and nomograms for determining the expected (normal) frontal area are presented. The author holds that the combination of fluoroscopy and orthodiascopy is the most valuable roentgenologic method of examining the heart and recording
Orthodiascopy.. Ann Intern Med. 1937;11:1066. doi: https://doi.org/10.7326/0003-4819-11-6-1066_1
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Published: Ann Intern Med. 1937;11(6):1066.
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Print ISSN: 0003-4819 | Online ISSN: 1539-3704
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