title: Advances in radiation therapy. Introduction.
authors.forename: B B
authors.initials: BB
authors.lastname: Mittal
authors.forename: J A
authors.initials: JA
authors.lastname: Purdy
authors.forename: K K
authors.initials: KK
authors.lastname: Ang
mesh_terms: D006801:Humans; D018787:Radiation Oncology / Q000295:instrumentation / Q000379:methods* / Q000639:trends; D011878:Radiotherapy / Q000295:instrumentation / Q000379:methods