. The American journal of roentgenology, radium therapy and nuclear medicine . the stric-ture thus preventing sawing of the thread upon thesoft tissues at the cardia. The radiferous capsuleis then drawn down the esophagus into the strictureunder x-ray guidance and the taut thread held inposition by the forceps b clamped on the gastro-stomy tube close to the skin. the radium applicator, whether for use bythe sound or by the thread and gastrostomymethod, it is our custom to use two, and attimes three, capsules, placed end to end,a 100 mgm. in the middle, and a 50 mgm. 864 The Technique of Radiat
. The American journal of roentgenology, radium therapy and nuclear medicine . the stric-ture thus preventing sawing of the thread upon thesoft tissues at the cardia. The radiferous capsuleis then drawn down the esophagus into the strictureunder x-ray guidance and the taut thread held inposition by the forceps b clamped on the gastro-stomy tube close to the skin. the radium applicator, whether for use bythe sound or by the thread and gastrostomymethod, it is our custom to use two, and attimes three, capsules, placed end to end,a 100 mgm. in the middle, and a 50 mgm. 864 The Technique of Radiation Therapy of Esophageal Carcinoma capsule on either end. The whole is con-tained in the usual i mm. of brass filterand wrapped with plastic rubber of thethickness estimated feasible in the givencase, using the maximum amount ofwrapping. Near the upper end of the prepa-ration, a cuff of rubber is wrapped insuch a way as to form a guard against theslipping of the preparation entirely belowthe stricture. Of course, in some cases it isimpossible to canalize the narrowed lumen. Fig. 5. Details of construction of radifcrous radium capsule tlircaded is wrapped with elasticrubber in such thickness and shape as the indicationsof the case permit. The upper end of the capsuleis widened out so as to form a shoulder. One canfeel impaction of this shoulder against the upperend of the stricture and thus know when to stoppulling. with even the ordinary applicator in itsbrass co\er, to say nothing of additionalrubber; in such cases we content ourselveswith the silver filter for the first time,usually finding that it is possible, after thelapse of a few days, to use the more bulkyapplicator. Renewed roentgen applications andradium treatments are given hen circum- stances warrant, but it is our intention andhope to give all the radiation necessaryduring the first attack. We hope so toperfect our calculations and our techniquethat this may be realized; but to date weha\e found it nec
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