Young as is the treatment of disease by the various forms of radiant energy, there is already confusion in its terminology, and it will not be out of place to begin this review with the statement that the term "actino-therapy" is now the accepted designation for the method that employs the violet and ultraviolet spectral rays. The x-ray treatment is known as "radiotherapy," while "phototherapy" is employed for all kinds of light treatment collectively. There is need for insistence on exactitude in the employment of these terms, and even some of those who especially occupy themselves with photo-therapeutics are open to criticism in this regard. Thus Freund entitles the authoritative work that he has just published "Grundriss der Gesammten Radiotherapie,"'including therein not only the Röntgen treatment, but also that by high-frequency currents, Becquerel rays, visible and ultraviolet light rays, and even heat rays. The latter
GOTTHEIL WS. RECENT ADVANCES IN ACTINOTHERAPY. JAMA. 1904;XLII(12):755–758. doi:10.1001/jama.1904.92490570009001b
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