The electro-therapeutic guide, or, A thousand questions asked and answered . f the X-ray from the different tubes, the tubes being denominated hard,medium. or soft, according to the density of the shadows seen. The density of the human tissues will also act as filters, so that wewill get different degrees of shadows or silhouettes on the photographicplates and fluorescent screens, and thus distinguish between the flesh, bones,and foreign metallic bodies. This fact is of great importance to us in sur-gery, enabling us to detect and correct fractures, dislocations, and abnor-malities of the hard
The electro-therapeutic guide, or, A thousand questions asked and answered . f the X-ray from the different tubes, the tubes being denominated hard,medium. or soft, according to the density of the shadows seen. The density of the human tissues will also act as filters, so that wewill get different degrees of shadows or silhouettes on the photographicplates and fluorescent screens, and thus distinguish between the flesh, bones,and foreign metallic bodies. This fact is of great importance to us in sur-gery, enabling us to detect and correct fractures, dislocations, and abnor-malities of the hard parts, and to diagnose diseased conditions, and to lo-cate foreign bodies of metallic nature. Many lives have thus been saved,and operations simplified, and deformities prevented. When the shadows of the bones of the hand are so dense and. black,when seen in the scope, that the joints cannot be distinguished, it showseither a weak current or that the tube is too soft for good fluoroscopy, orradiography, although a fairly good radiograph will result from a long Fig. A. Shadow of hand shown with a soft tube. This condition of the tube will be indicated by the cut above, whichshows the shadows cast on the scope screen by a very soft tube. Thewhole hand shows dark, and the bones run together. Such a tube can beused only for superficial treatments, and prolonged exposures at a shortdistance, may be given with safety. 154 THE GUIDE
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Keywords: ., bookcentury1900, bookdecade1900, booksubj, booksubjectelectricity
