title: Comment on "determination of the depth of 50% of maximum ionization, I50, for electron beams by the divided difference method" [med. phys. 31, 2068-2074 (2004)].
authors.forename: Malcolm
authors.initials: M
authors.lastname: McEwen
mesh_terms: D000465:Algorithms; D002138:Calibration / Q000592:standards; D004583:Electrons / Q000627:therapeutic use*; D009716:Numerical Analysis, Computer-Assisted; D017410:Practice Guidelines as Topic; D011874:Radiometry / Q000295:instrumentation* / Q000379:methods* / Q000592:standards; D011879:Radiotherapy Dosage / Q000592:standards; D011880:Radiotherapy Planning, Computer-Assisted / Q000295:instrumentation* / Q000379:methods* / Q000592:standards; D012015:Reference Standards; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity