McDermott, P N The physical basis for empirical rules used to determine equivalent fields for phantom scatter. [electronic resource] - Medical physics Nov 1998 - 2215-9 p. digital Publication Type: Journal Article ISSN: 0094-2405 Standard No.: 10.1118/1.598420 doi Subjects--Topical Terms: Phantoms, ImagingPhotonsRadiotherapy DosageRadiotherapy Planning, Computer-AssistedScattering, RadiationX-Rays