. The American journal of roentgenology, radium therapy and nuclear medicine . factor, inasmuch as the air intake asregistered b\ the spirometer varied only Mutation of Pulmonary Shadows Due to Type of Breathing 631 from 12 to 20 per cent in favor of costalbreathing. That the mutations are asso-ciated with the type of respiration wasapparently established when it was dis-covered that the accompanying films couldall be readily duplicated by governingthe type of respiration. Their presenceprobably can best be explained by the attempting to determine the effect oftuberculin injections on the pulm
. The American journal of roentgenology, radium therapy and nuclear medicine . factor, inasmuch as the air intake asregistered b\ the spirometer varied only Mutation of Pulmonary Shadows Due to Type of Breathing 631 from 12 to 20 per cent in favor of costalbreathing. That the mutations are asso-ciated with the type of respiration wasapparently established when it was dis-covered that the accompanying films couldall be readily duplicated by governingthe type of respiration. Their presenceprobably can best be explained by the attempting to determine the effect oftuberculin injections on the pulmonarylesion, or the progress and distribution ofthe disease by serial occurrence, however, is especially tobe remembered in studies devoted to thecorrelation of the roentgenography andpathology of Fig. 5. Costal Breathing. Case 6667. Fig. 6. Abdominal Breathing. Case 6667. Figures 5 and 6 are further examples of mutations of shadows due to type of breathing, and in certainrespects contrast with the mutations noted in the other figures. theory that the x-rays impinge on lesions, From the foregoing it would seem inad- which, in common with the rest of the lung, visable to employ a strictly pathological have changed their shape with the type of nomenclature in interpreting pulmonary breathing. shadows. It would perhaps be better, at A knowledge of the shadow mutations least for the present, to use a terminology here referred to will prove helpful when descriptive of the pulmonary shadows. THE ROENTGENOLOGIST AND THE UROLOGIST IN THEDIAGNOSIS OE RENAL DISEASE* BY E. GRANVILLE CRABTREE, , AND WILLIAM M. SHEDDEN, Massachusetts General Hospital BOSTON, MASSACHUSETTS GENERAL CONSIDERATIONS \\JITH the rapid development of cysto-▼ scopy and the roentgen ray, largeburdens in di
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