title: Proposed National Bureau of Standards program for the calibration of instruments used in high-energy electron and x-ray beams.
mesh_terms: D004583:Electrons; D011874:Radiometry / Q000592:standards*; D011879:Radiotherapy Dosage / Q000592:standards*; D011882:Radiotherapy, High-Energy; D013679:Technology, Radiologic / Q000592:standards; D014481:United States