title: Effective SSD for electron beams as a function of energy and beam collimation.
authors: Department of Therapeuic Radiology-Radiation Oncology, University of Minnesota Hospital and Clinic, Minneapolis 55455, USA.
authors: D M
authors: DM
authors: Roback
authors: F M
authors: FM
authors: Khan
authors: J P
authors: JP
authors: Gibbons
authors: A
authors: A
authors: Sethi
mesh_terms: D055592:Biophysical Phenomena; D001703:Biophysics; D004583:Electrons; D006801:Humans; D010315:Particle Accelerators; D011880:Radiotherapy Planning, Computer-Assisted / Q000706:statistics & numerical data; D011882:Radiotherapy, High-Energy; D013679:Technology, Radiologic / Q000706:statistics & numerical data