Use of IAEA's phase-space files for virtual source model implementation: Extension to large fields. Issue 8 (August 2016)

• Record Type: Journal Article
• Authors: Rucci, Alexis; Carletti, Claudia; Cravero, Walter; Strbac, Bojan
• Is Part Of: Physica medica. Volume 32:Issue 8(2016)
• Page Start: 1030
• Page End: 1033
• Publication Date: 2016-08
• Subjects: Radiotherapy -- Monte Carlo -- Phase-space -- IAEA -- Virtual source -- Large fields; Medical physics -- Periodicals; Biophysics -- Periodicals; Biophysics -- Periodicals; Imagerie médicale -- Périodiques; Radiothérapie -- Périodiques; Rayons X -- Sécurité -- Mesures -- Périodiques; Physique -- Périodiques; Médecine -- Périodiques; 610.153
• DOI: 10.1016/j.ejmp.2016.07.006
• Languages: English
• ISSNs: 1120-1797

Abstract

Highlights: IAEA's phase-space files are used to build a photon beam virtual source model. The model was extended to large fields adding a virtual flattening filter. This virtual source model could be used as a TPS verification system. 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 × 15 cm 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.