title: The variation of percentage depth dose and back-scatter factor with beam quality.
mesh_terms: D000535:Aluminum; D002587:Cesium Isotopes / Q000627:therapeutic use; D003036:Cobalt Isotopes / Q000627:therapeutic use; D003300:Copper; D006801:Humans; D007854:Lead; D011867:Radioisotope Teletherapy; D011879:Radiotherapy Dosage; D011882:Radiotherapy, High-Energy; D012542:Scattering, Radiation; D012867:Skin
chemical_list: D002587:Cesium Isotopes; D003036:Cobalt Isotopes; D007854:Lead; D003300:Copper; D000535:Aluminum