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KMID : 0357520110340010043
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Journal of Radiological Science and Technology
2011 Volume.34 No. 1 p.43 ~ p.50
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A Study on Photon Dose Calculation in 6 MV Linear Accelerator Based on Monte Carlo Method
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Kang Sang-Koo
Ahn Sung-Hwan
Kim Chong-Yeal
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Abstract
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In this study we modeled the varian 2100C/D linear accelerator head and multi-leaf collimator by simulation with the GEANT4 Monte Carlo toolkit. Then central axis percentage depth dose profiles and lateral dose profiles within homogeneous water phantom() were evaluated with 6 MV photon beam. The simulations were performed in two stages. In the first stage, photon energy spectrum at the target were computed were computed. Then spectra data was directly irradiated in the water phantom using sampling techniques. The simulation data were compared with experimental data to evaluate the accuracy of the model. Results showed that two data were matched within 2% error boundary. The proposed method will be applied for simulation of dose calculation and dose distribution study.
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KEYWORD
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Varian 2100C/D, GEANT4, 6 MV photon, percentage depth dose, lateral dose
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