. Radiography, X-ray therapeutics and radium therapy . for Exposure.—One or several strips of the sensitive paperare placed on the part to be treated; they absorb practically no side of the envelope bear-ing the label must face thepatients skin. If the total doseis to be administered in severalsittings, the same strip is alwaysexposed again, so that the sumtotal of the rays reaching thepatient will also reach the many sittings with short ex-posures are to be given, it isconvenient to use more than onestrip ; one is left to record thetotal sum, and of the other,parts are cut
. Radiography, X-ray therapeutics and radium therapy . for Exposure.—One or several strips of the sensitive paperare placed on the part to be treated; they absorb practically no side of the envelope bear-ing the label must face thepatients skin. If the total doseis to be administered in severalsittings, the same strip is alwaysexposed again, so that the sumtotal of the rays reaching thepatient will also reach the many sittings with short ex-posures are to be given, it isconvenient to use more than onestrip ; one is left to record thetotal sum, and of the other,parts are cut off from time totime to make test developments. The number of the strip,and other remarks, are immedi-ately entered into the case book, where also the strip is stuck when it hasbeen washed and dried. Development—In order to find out the quantity of X-rays which hasbeen administered, the strip has to be developed. The developer consists of two stock solutions, A and B, mixed in properproportions with distilled water, and made up as follows : A B. Fi«. 202.—Arrangement of apparatus and paper whenusing Kienbocks method of estimating dosage. Distilled water . 1000 Distilled v ater 1000 Sulphite of soda . 150 grammes Potassium carbonate . 110 grammes Metol (Hauff) . 15 FIXING SOLUTION Distilled water .... 1000 Sulphite of soda 20 grammes Tartaric acid .... 10 Hyposulphite of soda . 200 Great care must be taken in preparing the solutions ; it is essentialthat the bottles shall be absolutely clean, and that distilled water shall be 284 RADIATION THERAPEUTICS used throughout. The developer should never be used when it has becomestale. An alternative developer consists of a stock solution, made up as follows : Metol ..... Hydroquinone ....Sodii sulphite .... Carbonate .....10 per cent solution of potassium bromideDistilled water .... 1 gramme 4 grammes 50 >> 50 ,, 4 500 400 grammes 1000 25 grammes The fixing solution is made up as follows : Hy
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