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The moment the skiagraph was taken, it was very clear which bone should be removed. Bony tumors elsewhere can also be diagnosticated and properly treated. Possibly, also, we may be able to determine the presence of dead bone, though I am not aware of any such skiagraphs having been taken. Diseases and injuries of the joints will be amenable to examination by this method.
In the laboratory, as soon as he could develop the skiagraphs he had taken, Kennedy began a minute study of them. It was not long before he looked over at me with the expression I had come to recognize when he found something important. I went over and looked at the radiograph which he was studying. To me it was nothing but successive gradations of shadows.
We do not yet know, by skiagraphs of successful results after fracture, just how such bones look during the process of healing, and, therefore, we cannot yet be sure that the skiagraph of an unsuccessful case is an evidence of unskilfulness on the part of the surgeon. In diseases of bone, which are obscure, it has already proved of great advantage, as in a case related by Mr.
The bones, however, as is seen in nearly all of the skiagraphs illustrating this paper, cast well-defined shadows. This is at once an advantage and a hindrance.
Hence, skiagraphs of the same object exposed to the rays for varying times may be of value in showing the different tissues. The most permeable of the normal tissues are cartilage or gristle, and fat. Reid of Dundee to show the difference between the rind, or secreting portion, which is more transparent, and the central portion, consisting chiefly of conducting tubes, which is less transparent.
One of the principal difficulties of the method at present is the time ordinarily required to obtain a good picture. Usually this time may be stated at in the neighborhood of an hour, though many good skiagraphs have been taken in a half hour or twenty minutes. It is stated that Messrs. McLeennan, Wright, and Keele of Toronto have reduced the necessary time to one second, and that Mr.
"I want you to preserve that mask," directed Kennedy, as he finished taking his pictures. "Say nothing about it to any one. In fact, I should advise putting it in your family safe for the present." Hastily we drove back to the laboratory and Kennedy set to work again developing the second set of skiagraphs. I had not long to wait, this time, for him to study them.
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