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Journal of Medical Signals and Sensors، جلد ۱۴، شماره ۸، صفحات ۱۰-۴۱۰۳
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عنوان انگلیسی Monte Carlo Model Validation of 6MV Beam of OMID, the First Iranian Linear Accelerator
چکیده انگلیسی مقاله Abstract Monte Carlo (MC) techniques are regarded as an accurate method to simulate the dose calculation in radiotherapy for many years. The present paper aims to validate the simulated model of the 6-MV beam of OMID linear accelerator (BEHYAAR Company) by EGSnrc codes system and also investigate the effects of initial electron beam parameters (energy, radial full width at half maximum, and mean angular spread) on dose distributions. For this purpose, the comparison between the calculated and measured percentage depth dose (PDD) and lateral dose profiles was done by gamma index (GI) with 1%-1 mm acceptance criteria. MC model validating was done for 3 cm × 3 cm, 5 cm × 5 cm, 8 cm × 8 cm, 10 cm × 10 cm, and 20 cm × 20 cm field sizes. To study the sensitivity of model to beam parameters, the field size was selected as 10 cm × 10 cm and 30 cm × 30 cm. All lateral dose profiles were obtained at 10 cm. Excellent agreement was achieved with a 99.2% GI passing percentage for PDD curves and at least 93.8% GI for lateral dose profiles for investigated field sizes. Our investigation confirmed that the lateral dose profile severely depends on the considered source parameters in this study. PDD only considerably depends on the initial electron beam energy. Therefore, source parameters should not be specified independently. These results indicate that the current model of OMID 6-MV Linac is well established, and the accuracy of the simulation is high enough to be used in various applications.
کلیدواژه‌های انگلیسی مقاله Benchmarking,dose distribution,EGSnrc,gamma analysis,Monte Carlo simulation
نویسندگان مقاله | Mohammad Amin Abdoli
Department of Physics, Isfahan University of Technology, Isfahan, Iran Knowledge-based Company Behyaar Sanaat Sepahan, Isfahan, Iran


| Maryam Hassanvand
Department of Physics, Isfahan University of Technology, Isfahan, Iran Knowledge-based Company Behyaar Sanaat Sepahan, Isfahan, Iran


| Navid Nejatbakhsh


نشانی اینترنتی http://jmss.mui.ac.ir/index.php/jmss/article/view/726
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زبان مقاله منتشر شده en
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نوع مقاله منتشر شده Case Reports
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