Abstract The necessity for a unit of measurement of roentgen dosage was realized soon after roentgen rays were used therapeutically. The many methods and instruments that have been used for measuring the intensity and quality of radiation are well known. The most accurate method of measuring intensity is by the ionization of air, while spectrometry offers the most accurate means of measuring the quality of x-radiation.1 In 1908, Villard2 described a unit of x-radiation based on the ionization of air. Additional units of x-radiation based on ionization have been described by Friedrich and Kroenig,3 Duane,4 Behnken5 and Solomon.6 In 1928 the international unit of radiation, the roentgen (r), was defined by the International X-Ray Unit Committee7 and accepted by the International Congress of Radiology. The roentgen was defined as the quantity of x-radiation which when the secondary electrons are fully utilized and the wall References 1. MacKee, G. M.: X-Rays and Radium in the Treatment of Diseases of the Skin , Philadelphia, Lea & Febiger, 1927. 2. Villard, J.: Arch. de l'électric. méd. 16:692, 1908. 3. Friedrich, W., and Kroenig, B.: Strahlentherapie , (supp. 3) , 1918. 4. Duane, W.: The Scientific Basis of Short Wave-Length Therapy , Am. J. Roentgenol. 9:781 ( (Dec.) ) 1922. 5. Behnken, H.: Ztschr. f. techn. Phys. 1:3, 1924. 6. Solomon, I.: Bull. et mém. Soc. de radiol. méd. de France 10:30, 1922. 7. Report from the International X-Ray Unit Committee , Am. J. Roentgenol. 20:470 ( (Nov.) ) 1928. 8. Beets, H. N., and Arens, R. A.: Physical Measurements and Comparative Technic in Relation to Biological Dosage , Radiology 3:293, 1924.Crossref 9. Schinz, H. R., and Slotopolsky, B.: Ergebn. d. med. Strahlenforsch. 1: 476, 1925. 10. Meyer, William H., and Glasser, Otto: Erythema Doses in Absolute Units , Radiology 6:320 ( (April) ) 1926.Crossref 11. Kuestner, H.: How Many Roentgen Units Correspond to the Erythema Dose? Strahlentherapie 26:120, 1927. 12. Widmann, B. P.: Unfiltered Roentgen Rays for Superficial Cancers of Wide and Deep Involvement , Am. J. Roentgenol. 28:526, 1932. 13. Andrews, G. C., and Braestrup, C. B.: Skin Erythema Dose in Terms of Roentgens in Superficial Therapy , Am. J. Roentgenol. 29:663 ( (May) ) 1933. 14. Eller, J. J., and Mutscheller, A.: Dosage of Skin Therapy Expressed in International Roentgen Units , Arch. Dermat. & Syph. 27:670 ( (April) ) 1933. 15. Pfahler, G. E., in discussion on paper by Newell, R. R.: Shall we Record and Report All X-Ray Dosages in Roentgens? Radiology 21:216 ( (Sept.) ) 1933. 16. Failla, G., in discussion on paper by Newell.15 17. Meyer, W. H., and Braestrup, C. B.: Quality Determination of the Roentgen Rays , Radiology 11:72 ( (July) ) 1928. 18. Chamberlain, W. E., and Newell, R. R.: The Epilation and the Erythema Dose , Radiology 10:280 ( (April) ) 1928. 19. Shanks, S. C.: X-Ray Treatment of Ringworm of the Scalp , Brit. J. Radiol. 5:761 ( (Oct.) ) 1932. 20. Since writing this article we have been informed that the mekapion and certain other iontoquantimeters have been modified so that their readings now agree with the Victoreen condenser type dosemeter.
Archives of Dermatology and Syphilology – American Medical Association
Published: Dec 1, 1934
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