. Röntgen rays and electro-therapeutics : with chapters on radium and phototherapy . rbeing encased by a cylinder of lead-flux glass. A set of two specula of lead glass further serve tolocalize the X-rays. 422 ELECTEO-THEEAPEUTICS. treatment; but, the current being of small amperage, the injury to thecoil at most would be slight. The mechanical or the liquid interruptermay be employed, but the mechanical, being the cleaner and easy of manip-ulation, is commonly used. The electrolytic interrupter has met withlittle favor, as the enormous current transmitted to the primary is totallyunnecessary,
. Röntgen rays and electro-therapeutics : with chapters on radium and phototherapy . rbeing encased by a cylinder of lead-flux glass. A set of two specula of lead glass further serve tolocalize the X-rays. 422 ELECTEO-THEEAPEUTICS. treatment; but, the current being of small amperage, the injury to thecoil at most would be slight. The mechanical or the liquid interruptermay be employed, but the mechanical, being the cleaner and easy of manip-ulation, is commonly used. The electrolytic interrupter has met withlittle favor, as the enormous current transmitted to the primary is totallyunnecessary, and is detrimental to the life of the tube and the coil. Ceookes Tube. The tubes employed for therapeutic purposes (Figs. 211, 212, 213,and 214) are practically similar, in degree of vacuum, to those employedfor diagnostic purposes. They are self-regulating, or those in which thevacuum can be altered by automatic appliances. Tubes are also classifiedaccording to their degree of vacuum, as soft, medium, and rays coming from a tube of low vacuum produce an early and rapid. Fig. 214.—Dr. J. Ronsenthals tube for therapeusis, as employed by him in the hospitals of Munich. tissue change. When a softer tube is employed more tissue changeresults, because under such conditions the rays are considerably lesspenetrating and more readily absorbed by the tissues, than with a hardtube. This is the accepted view of most X-ray operators. When thesuspected lesion is deep-seated, as in cases of carcinoma of the uterus,stomach, or abdomen, a medium tube should be used. The connec-tion of the Crookes tube with the oscilloscope is explained at Fig. 215. Peotection or Healthy Parts. Prior to the application of the rays (as in cases of superficialulcers, epithelioma, etc.) the surrounding normal tissue should be pro-tected against the influence of the rays. This may be accomplished byshielding the surrounding integument by leaden sheets, iz of an inch(1 mm.) in thickness, covered with ad
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectradiolo, bookyear1910
