[Effect of absorber on the production of hollow-out as well as concave beam focus in conformation radiotherapy].
D000535:Aluminum; D003036:Cobalt Isotopes / Q000627:therapeutic use; D007501:Iron; D007854:Lead; D011835:Radiation Protection / Q000295:instrumentation*; D011867:Radioisotope Teletherapy; D011874:Radiometry; D013679:Technology, Radiologic; D015032:Zinc
D003036:Cobalt Isotopes; D007854:Lead; D000535:Aluminum; D007501:Iron; D015032:Zinc