title: Tissue compensators for megavoltage radiotherapy fabricated from hollowed Styrofoam filled with wax.
mesh_terms: D003037:Cobalt Radioisotopes; D011137:Polystyrenes; D011867:Radioisotope Teletherapy / Q000295:instrumentation*; D014885:Waxes
chemical_list: D003037:Cobalt Radioisotopes; D011137:Polystyrenes; D014885:Waxes