title: Introduction: metabolic and functional imaging in radiation therapy.
authors.forename: James
authors.initials: J
authors.lastname: Balter
mesh_terms: D006801:Humans; D009369:Neoplasms / Q000000981:diagnostic imaging* / Q000532:radiotherapy*; D049268:Positron-Emission Tomography; D011880:Radiotherapy Planning, Computer-Assisted / Q000379:methods*; D015899:Tomography, Emission-Computed, Single-Photon