File:Radiography, x-ray therapeutics and radium therapy (1915) (14571015340).jpg

Identifier: radiographyxrayt00knoxuoft (find matches)
Title: Radiography, x-ray therapeutics and radium therapy
Year: 1915 (1910s)
Authors: Knox, Robert, 1868-1928
Subjects: Radiography Radiotherapy X-rays
Publisher: London : A. & C. Black
Contributing Library: Gerstein - University of Toronto
Digitizing Sponsor: MSN

View Book Page: Book Viewer
About This Book: Catalog Entry
View All Images: All Images From Book
Click here to view book online to see this illustration in context in a browseable online version of this book.

Text Appearing Before Image:
hard tubes, which are so generallyused when filters are employed. It is remarkable to note how often the same area may be treated withoutproducing any marked reaction. IVhen the reaction is not very great,treatment can be steadily continued with an increasing thickness of filters,whereas without their use it would have to be suspended for weeks andvaluable time would be lost. The treatment may be continued even in the presence of marked re-action if the healthy skin can be protected by thick layers of lead or leadrubber, leaving only the diseased areas exposed to the treatment. Filter Equivalents.—Dr. R. W. A. Salmond, working in the ResearchLaboratory of the Cancer Hospital, conducted an exhaustive investigationinto the value of the various substances used for filtration of X-rays. Hisresults show a remarkable uniformity, and will be of the greatest use tothe radiotherapist. A tabulated list of his conclusions is given below : Filtration Equivalents for Hard Therapeutic X-Ray Tubes
Text Appearing After Image:
The Selection of the Filter.—This largely depends upon the objectof the treatment. In superficial lesions a ^ mm. filter of aluminium willsuffice. When treatment has to be continued over a long period, at frequentintervals, then it is well to use a filter 1 mm. thick for several weeks, andgradually increase up to 3 mm. The choice of filter in malignant disease isfully discussed in the chapter on the treatment of malignant disease. In thetreatment of myoma uteri by the Freiburg technique the filter is 3 mm. thick.This was found by Gauss to be the most useful one, and it affords ampleprotection when many ports of entry are employed. In these cases greatcare must be exercised to prevent overlapping of the areas. Additional Filters.—In addition to the metal filters, a number ofthick felt pads and a good supply of chamois leather will be found useful.A supply of thick lead sheets should be at hand. Lead rubber is also veryuseful for protecting the skin surrounding the area to be treate

Note About Images