HISTORICAL SIGNIFICANCE of Physical Research and Radiation Therapy using Radium and Its Decay Products.
Almost immediately after the discovery of radium by Marie and Pierre Curie in 1898, it was used to treat cancer by placing it near or in a tumor, and also it was observed that radium and its decay products emit .ALPHA., ..BETA. and .GAMMA. rays. Using these radiations, physical researches have been performed to discover many new phenomena. As concerns radium .GAMMA. rays, brachytherapy and telecurietherapy have been developed as treatment methods of cancer. Brachytherapy includes surface mould, interstitial and intracavitary therapy, and by these methods, exellent treatment results for cancers of the uterine cervix, tongue and larynx were obtained. In this report, historical significances of physical research and radiation therapy using radium and its decay products are considered. (author abst.)
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