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In this book the authors begin with a description and comparison of the various radiographic methods of examining the heart and the aorta, including their personal technic. They consider that there are three reliable methods, teleradiography, orthodiography and teleradioscopy. The latter two furnish identical information and are designated as radioscopy of percision. They point out that teleradiography and radioscopy of percision each have its advantages and that the association of the two methods gives nearly perfect results. If. however, only one is to be used the orthodiographic examination gives more precise information.
In the following chapter the authors describe the normal cardiac shadow in the frontal and oblique positions and consider variations in the physiological form of the heart. In subsequent chapters changes produced in the cardiac shadow by various pathological conditions as chronic valvular diseases, congenital defects, affections of the pericardium, aortitis and aneurisms of the thoracic aorta are
THE HEART AND THE AORTA: STUDIES IN CLINICAL PATHOLOGY. Arch Intern Med (Chic). 1922;29(2):276. doi:10.1001/archinte.1922.00110020135009
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