. The Roentgen rays in medicine and surgery as an aid in diagnosis and as a therapeutic agent : designed for the use of practitioners and students . 00 Fig. 319. Augusta G., forty-five years old. Chronic periostitis of th of the tibia. psTo: of a small portion DISEASES OF THE BONES AND OF THE JOINTS 559 Diseases of the Bones Methods of Examination.—The general directions already given forexamination of the bones when fractured largely apply in the followingdiseases. It is well to place the healthy and diseased bone on the sameplate and photograph them thus, for purposes of 4:omparison. The bes


. The Roentgen rays in medicine and surgery as an aid in diagnosis and as a therapeutic agent : designed for the use of practitioners and students . 00 Fig. 319. Augusta G., forty-five years old. Chronic periostitis of th of the tibia. psTo: of a small portion DISEASES OF THE BONES AND OF THE JOINTS 559 Diseases of the Bones Methods of Examination.—The general directions already given forexamination of the bones when fractured largely apply in the followingdiseases. It is well to place the healthy and diseased bone on the sameplate and photograph them thus, for purposes of 4:omparison. The bestresults can be obtained if a new tube that has a low resistance is Fig. 320. Augusta G., forty-five years of age. From same patient as Fig. 319. Shows loss of bone substance in phalanges. The special difficulties lie in so arranging the apparatus as to obtain thebest differentiation, and in the correct reading of the radiograph, par-ticularly in cases where the disease is beginning and only a small focusis affected. The changes in the outline and thickness of the bones, ofthe periosteuM, in the cancellated structure of the bones, in the amountof rays absorbed by the tissues, should all be carefully studied in theradiographs. A well-made radiograph may be defined as one whichshows the details of the bones, and also of the soft parts, such as skin, 560 THE ROENTGEN RAYS IN MEDICINE AND SURGERY


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