title: Quality assurance in external beam radiation therapy.
authors.affiliation: Joint Center for Radiation Therapy, Harvard Medical School, Boston, MA 02115.
authors.forename: G K
authors.initials: GK
authors.lastname: Svensson
mesh_terms: D002138:Calibration; D006801:Humans; D011785:Quality Assurance, Health Care; D011882:Radiotherapy, High-Energy / Q000592:standards