title: Letter: Electron back-scattering from lead in a perspex phantom.
mesh_terms: D004583:Electrons; D007854:Lead; D008768:Methylmethacrylates; D008961:Models, Structural; D011882:Radiotherapy, High-Energy; D012542:Scattering, Radiation
chemical_list: D008768:Methylmethacrylates; D007854:Lead