title: Physical penumbra change of beam profile due to film digitization.
authors.affiliation: Department of Radiation Oncology, University of Rochester, New York 14642, USA.
authors.forename: F F
authors.initials: FF
authors.lastname: Yin
mesh_terms: D003720:Densitometry; D006801:Humans; D007834:Lasers; D008433:Mathematics; D011878:Radiotherapy / Q000379:methods*; D011879:Radiotherapy Dosage; D014962:X-Ray Film