出典:Wiktionary
thorotrast (uncountable)
出典:Wikipedia
出典:『Wikipedia』 (2011/06/13 02:33 UTC 版)
Thorotrast is a suspension containing particles of the radioactive compound thorium dioxide, ThO2, used as a contrast medium in X-ray diagnostics in the 1930s and 40s (use in some countries, such as the U.S., continued into the 1950s).