title: Use of IAEA's phase-space files for virtual source model implementation: Extension to large fields.
abstract: In a previous work, phase-space data files (phsp) provided by the International Atomic Energy Agency (IAEA) were used to develop a hybrid virtual source model (VSM) for clinical photon beams. Very good agreement with dosimetric measurements performed on linear accelerators was obtained for field sizes up to 15×15cm(2). In the present work we extend the VSM to larger field sizes, for which phsp are not available. We incorporate a virtual flattening filter to our model, which can be determined from dose measurements for larger fields. In this way a fully functional VSM can be built, from publicly available IAEA's phsps and standard dose measurements, for fields of any size and tailored to a particular linac.
authors.affiliation: Instituto de Física del Sur (IFISUR, UNS-CONICET), Departamento de Física, Universidad Nacional del Sur, Av. Alem 1253, 8000 Bahía Blanca, Argentina. Electronic address: alexisrucci@gmail.com.
authors.forename: Alexis
authors.initials: A
authors.lastname: Rucci
authors.affiliation: Instituto de Física del Sur (IFISUR, UNS-CONICET), Departamento de Física, Universidad Nacional del Sur, Av. Alem 1253, 8000 Bahía Blanca, Argentina.
authors.forename: Claudia
authors.initials: C
authors.lastname: Carletti
authors.affiliation: Instituto de Física del Sur (IFISUR, UNS-CONICET), Departamento de Física, Universidad Nacional del Sur, Av. Alem 1253, 8000 Bahía Blanca, Argentina.
authors.forename: Walter
authors.initials: W
authors.lastname: Cravero
authors.affiliation: International Medical Centre, Centre for Radiotherapy, Dvanaest beba bb, 78000 Banja Luka, Bosnia and Herzegovina.
authors.forename: Bojan
authors.initials: B
authors.lastname: Strbac
mesh_terms: D007390:International Agencies; D008962:Models, Theoretical; D010315:Particle Accelerators; D011874:Radiometry / Q000295:instrumentation / Q000379:methods*; D014584:User-Computer Interface
keywords: IAEA; Large fields; Monte Carlo; Phase-space; Radiotherapy; Virtual source