File:The American journal of roentgenology, radium therapy and nuclear medicine (1906) (14757344235).jpg

Identifier: americanjournroen09ameruoft (find matches)
Title: The American journal of roentgenology, radium therapy and nuclear medicine
Year: 1906 (1900s)
Authors: American Radium Society American Roentgen Ray Society
Subjects: Radiotherapy X-rays
Publisher: Springfield, Ill. C.C. Thomas
Contributing Library: Gerstein - University of Toronto
Digitizing Sponsor: University of Toronto

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the height of suspended diaphrag-matic inspiration. In a few instances,exposures were also made during tidalrespiration, but the contrast with theother films was not sufficiently marked tomerit especial attention. Posterior ex- Mutation of Pulmonary Shadows Due to Type of Breathing 629 posures were preferred to the usual an-terior exposures, because on abdominalbreathing the thorax does not remain incontact with the film, owing to the protru-sion of the abdomen, thus causing atechnical difference which might proveconfusing in a study of this nature.Exacting standards were employed in thedetails of x-ray technique so as to obtain upper intercostal spaces and the elevatedposition of the diaphragmatic shadow oncostal inspiration, and in Figure 2 theelongation of the mediastinal shadow ondiaphragmatic inspiration. In addition, theposition and shape of the cardiac shadow arenoticeably changed. The heart is usuallydrawn to the left on diaphragmaticbreathing, owing to the relatively greater
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Fig. 1. Costal breathing. Case 4291. The outline of thethorax is relatively short and broad. The heart anddiaphragmatic shadows are conspicuous and theshadow projecting from the left hilum upward andoutward is dense and sharply defined. uniform photographic results, a requisitefor a satisfactory comparative study ofthe films. On costal inspiration expansion of thelung is manifested by an increase in thecircumference of the chest; while on dia-phragmatic inspiration the chest remainsimmobile, and expansion is effected solelyby the descent of the diaphragm. Thedirection in which the lung expands affectsits shape. It is relatively short and thickon costal inspiration, but long and narrowon diaphragmatic inspiration. This differ-ence is also evidenced on the films by asimilar contrast in the respective outlinesof the lung fields. In Figure i we may notethe relative increase in the width of the Fig. 2. Abdominal breathing. Case 4291. The outlineof the thorax is long and narrow. Mediastinal

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