title: Ionizing radiation: thorium dioxide.
mesh_terms: D000818:Animals; D002273:Carcinogens / Q000633:toxicity*; D003287:Contrast Media / Q000633:toxicity; D004781:Environmental Exposure; D033161:Government Regulation; D006801:Humans; D011882:Radiotherapy, High-Energy / Q000009:adverse effects; D013911:Thorium Dioxide / Q000633:toxicity*; D014481:United States
chemical_list: D002273:Carcinogens; D003287:Contrast Media; D013911:Thorium Dioxide