. Le Röntgen rayons dans le travail médical . t de respiration diaphragmatique. Là où les theribs sont tuiles et fixes, la respiration doit nécessairement être charriedon presque, sinon entièrement, par le diaphragme. L'angle des clavicules est également significatif. L'auteur peut prétendre avoir été le premier à montrer que l'aradogramme peut être pris de l'avant de la poitrine. La photo-graphe a été prise d'un homme épris en 1898. Il a montré l'aorticaneurisme et un emphysème tacheté et probablement bronchiectaticlung. Il a été exposé à la réunion d'Édimbourg de l'Association médicale de BritishMedical en 1890, puis à la Rontgen-sociale
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. The Röntgen rays in medical work . t of diaphragmatic breathing. Where theribs are roof-tile and fixed, respiration must necessarily be carriedon almost, if not wholly, by the diaphragm. The angle of the clavicles is also significant. The author may claim to have been the first to show that aradiogram can be taken from the front of the chest. The photo-graph was taken from a stout man in 1898. It showed aorticaneurism and a mottled emphysematous and probably bronchiectaticlung. It was exhibited at the Edinburgh meeting of the BritishMedical Association in 1890, and later at the Rontgen Society. (b) Heart and Great Vessels; Aneurisms, Enlargements ofHeart, and so on. The fact that the lungs are full of air and easily permeable to therays makes it possible to get a good outline of the human heart. Asthe result of a number of experiments on the dead body, Poch 21 322 THE BONTGEN HA YS IN MEDICAL WORK demonstrated to the Vienna Gesellschaft in January, 1897, that itwas possible in the empty heart to make out the valves and. Fig. 159.—Normal Thorax (Short exposure)Mr. E. W. H. Shenton. trabecular as clear spaces against a darker cardiac background.When the heart cavity contained water or blood, no such differentia-tion could be made. MEDICAL AND SURGICAL APPLICA TIONS 323 This relative opacity of blood is an important quality so far asconcerns the Rontgen diagnosis of alterations in the form of theheart and bloodvessels. The reason why a bloodvessel should resista long exposure is obscure. We know that after prolonged exposureboth biliary and uric acid calculi will cease to cast any shadow, while a rib nearly ceases to do so, and a phosphatic shadow becomesmuch lighter (Dr. Swains experiment, p. 174). Mr. C. W. Mansell-Moullin mentioned to the writer a case in which the abdomen wasexposed for two hours. The bones left no record, but the abdominalaorta threw a strong shadow. Clearly the widespread movements of respiration affect more orless the whole contents of thora
