title: Is the 'fictitious' virtual source a redundant concept for scanned therapeutic electron beams?
authors.affiliation: Department of Medical Physics, Manitoba Cancer Treatment and Research Foundation, Winnipeg, Canada.
authors.forename: G A
authors.initials: GA
authors.lastname: Sandison
authors.forename: W
authors.initials: W
authors.lastname: Huda
mesh_terms: D004583:Electrons; D006801:Humans; D008962:Models, Theoretical; D011879:Radiotherapy Dosage; D011882:Radiotherapy, High-Energy