. Röntgen ray diagnosis and therapy . -sions in the pleural cavity, also fibrous swards of the pleura andirregularities of the excursions of the diaphragm are noted. For skiagraphing the patient an even table of strong construc-tion or the carpeted floor is selected. Posterior irradiation is donein the dorsal position, the spinal column, as well as the posteriorportions of the ribs with their heads, necks, and tubercles becom-ing apparent, especially at their right side. The direction of theposterior ribs is downward, while that of the anterior is image of the anterior aspect of the
. Röntgen ray diagnosis and therapy . -sions in the pleural cavity, also fibrous swards of the pleura andirregularities of the excursions of the diaphragm are noted. For skiagraphing the patient an even table of strong construc-tion or the carpeted floor is selected. Posterior irradiation is donein the dorsal position, the spinal column, as well as the posteriorportions of the ribs with their heads, necks, and tubercles becom-ing apparent, especially at their right side. The direction of theposterior ribs is downward, while that of the anterior is image of the anterior aspect of the ribs is naturally diffusedon account of the much greater distance from the plate. Soft86 CHKST 87 tubes show the ribs best, the time of exposure not to exceed threeminutes. In skiagraphing anteriorly by posterior irradiation, the patient lying on his abdomen, the clavicle, the sternum, and the adjoiningribs can be well defined. The distinctness of the skiagraph suffers, Mm sternohyoid rl stemothyrcoid Trac/iea Clavjcti//iM subclaims. Col u-ansvCol drscendens Fig. 53.—Topographic Relations of Intrathoracic Viscera.(After Waldeyer.) 88 THE RONTGEN RAYS however, on account of the patients oppressed respiration. On ac-count of the distance the spinal column and the posterior ribsappear diffused. The heart being situated so near the anteriorchest wall, shows its outline well marked. The shadow of the largeblood-vessels is less distinct. The shadows of the normal lungs,especially the middle portions, are extremely light. The upper dorsal vertebrae, as far as they are not obstructed bythe shadows of the heart and the large vessels, show fairly same applies to the three left dorsal vertebrae. The otherportions of the spinal column appear indistinct within their extentof the thorax. Abscesses can sometimes be recognised in this re-gion by using the diaphragm. The outlines appear more markedin oblique projection, but there the skiagraph becomes considerablydistorted. The ste
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