Abstract

Introduction Radium emanation has a definite place in the treatment of cancer. Its chief advantage over the radium element is that it can be put into small enough containers and is of such nature that, once inserted into a tumor, it need never be removed. A second advantage is that while radon can be used for every treatment for which the radium element can be used, radon implants contain no radium. If they are mislaid, carried away on a patient, or lost in any other way, the loss is negligible. However, good radium emanation plants are of necessity sufficiently complicated to make them costly to install and to maintain. By the adoption of modern scientific methods it was hoped to develop a plant of low initial and maintenance costs which would be practical for both small and large amounts of radium. The requisites of a good emanation plant are: 1. The apparatus must be efficient; that is, as much as possible of the emanation formed must be collected in the container in which it is to be used, and it mus...

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