Use of IAEA's phase-space files for the implementation of a clinical accelerator virtual source model.
In the present work, phase-space data files (phsp) provided by the International Atomic Energy Agency (IAEA) for different accelerators were used in order to develop a Virtual Source Model (VSM) for clinical photon beams. Spectral energy distributions extracted from supplied phsp files were used to define the radiation pattern of a virtual extended source in a hybrid model which is completed with a virtual diaphragm used to simulate both electron contamination and the shape of the penumbra region. This simple virtual model was used as the radiation source for dosimetry calculations in a water phantom. The proposed model proved easy to build and test, and good agreement with clinical accelerators dosimetry measurements were obtained for different field sizes. Our results suggest this simple method could be useful for treatment planning systems (TPS) verification purposes.
Instituto de Física del Sur, Universidad Nacional del Sur, Consejo Nacional de Investigaciones Científicas y Técnicas, Av. Alem 1253, 8000 Bahía Blanca, Argentina; Departamento de Física, Universidad Nacional del Sur, Av. Alem 1253, 8000 Bahía Blanca, Argentina. Electronic address: alexisrucci@gmail.com.
Alexis
A
Rucci
Instituto de Física del Sur, Universidad Nacional del Sur, Consejo Nacional de Investigaciones Científicas y Técnicas, Av. Alem 1253, 8000 Bahía Blanca, Argentina; Departamento de Física, Universidad Nacional del Sur, Av. Alem 1253, 8000 Bahía Blanca, Argentina.
Claudia
C
Carletti
Instituto de Física del Sur, Universidad Nacional del Sur, Consejo Nacional de Investigaciones Científicas y Técnicas, Av. Alem 1253, 8000 Bahía Blanca, Argentina; Departamento de Física, Universidad Nacional del Sur, Av. Alem 1253, 8000 Bahía Blanca, Argentina.
Walter
W
Cravero
International Medical Centres, Centre for Radiotherapy, Dvanaest beba bb, 78000 Banja Luka, Bosnia and Herzegovina.
Bojan
B
Strbac
D006801:Humans; D007390:International Agencies; D008962:Models, Theoretical; D009678:Nuclear Energy; D010315:Particle Accelerators; D017785:Photons / Q000627:therapeutic use; D011874:Radiometry; D011880:Radiotherapy Planning, Computer-Assisted
IAEA; Monte Carlo; Phase-space; Radiotherapy; Virtual source model