| 单词 | radium plaque |
| 释义 | > as lemmasradium plaque 4. Medicine. More fully radium plaque. A flat applicator formerly used to apply radium or radium salts to the skin as a treatment for underlying cancer. Now historical. ΘΚΠ the world > health and disease > healing > medical appliances or equipment > equipment for radiation treatment > [noun] Kromayer lamp1911 radium needle1915 plaque1919 cobalt bomb1954 the world > health and disease > healing > medical treatment > treatment by radiation > [noun] > source radium plaque1919 seed1924 radon seed1925 radium bomb1929 bomb1930 teleradium1930 telecobalt1948 sealed source1962 1919 Amer. Jrnl. Roentgenol. 6 134/1 It is..a very simple matter to treat a small lesion with a radium plaque. 1931 G. E. Birkett Radium Therapy xi. 150 Superficial sclerosing type [of rodent ulcers].—In the early stages these may be successfully treated by the application of an unscreened radium plaque. 1950 J. Walter & H. Miller Short Textbk. Radiotherapy viii. 195 A beta-ray applicator is an example of a plaque. The one illustrated in Fig. 82 is made of brass, has an area of 4 sq. cm. and contains 5 mgm. of radium per square cm. It is covered by a filter of 0·1 mm. of monel metal. 1962 Encycl. Dict. Physics VI. 171/1 Formerly, radium plaques were used as β-emitters, but these have now been almost completely replaced by applicators containing strontium-90. radium plaque radium plaque n. see plaque n. 4. < as lemmas |
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