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Ratios of machine measurement and treatment planning system–calculated values broken down by energy and time period of the site visit. 6 × 6, 10 × 10, and 20 × 20 cm2 represent the field size for percentage depth dose measurements. Abbreviations: EDW = enhanced dynamic wedge; IMRT = intensity modulated radiation therapy; OAF = off-axis factor; OF = output factor; SBRT = stereotactic body radiation therapy.
