Li, X A Characteristics of orthovoltage x-ray therapy beams at extended SSD for applicators with end plates. [electronic resource] - Physics in medicine and biology Feb 1997 - 357-70 p. digital Publication Type: Journal Article ISSN: 0031-9155 Standard No.: 10.1088/0031-9155/42/2/008 doi Subjects--Topical Terms: HumansMethylmethacrylatesModels, TheoreticalNeoplasms--radiotherapyPhantoms, ImagingPhotonsRadiotherapy--instrumentationRadiotherapy DosageReproducibility of ResultsScattering, RadiationX-Rays