A cobalt 60 beam unit with a source-skin distance of 20 cm.
D003035:Cobalt; D003037:Cobalt Radioisotopes; D005047:Etoposide; D006801:Humans; D011851:Radioactivity; D011878:Radiotherapy / Q000295:instrumentation*
D003037:Cobalt Radioisotopes; D003035:Cobalt; D005047:Etoposide
COBALT/radioactive; RADIOTHERAPY/apparatus and instruments