title: Gamma rays: caesium 137 teletherapy units.
mesh_terms: D000388:Air; D002587:Cesium Isotopes / Q000627:therapeutic use*; D003300:Copper; D006801:Humans; D007854:Lead; D008954:Models, Biological; D011867:Radioisotope Teletherapy / Q000592:standards*; D011879:Radiotherapy Dosage / Q000592:standards*; D012542:Scattering, Radiation; D012867:Skin; D014867:Water
chemical_list: D002587:Cesium Isotopes; D014867:Water; D007854:Lead; D003300:Copper