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Iranian Journal of Medical Physics، جلد ۱۵، شماره Special Issue-۱۲th. Iranian Congress of Medical Physics، صفحات ۳۸۱-۳۸۱
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عنوان انگلیسی The comparison between 6 MV Primus LINAC simulation output using EGSnrc and commissioning data
چکیده انگلیسی مقاله Introduction: Monte Carlo calculation method is considered to be the most accurate method for dose calculation in radiotherapy. The purpose of this research is comparison between 6 MV Primus LINAC simulation output with commissioning data using EGSnrc and build a Monte Carlo geometry of 6 MV Primus LINAC as realistically as possible. The BEAMnrc and DOSXYZnrc (EGSnrc package) Monte Carlo model of the LINAC head was used as a benchmark. Materials and Methods In the first part, the BEAMnrc was used for the designing of the LINAC treatment head. In the second part, dose calculation and for the design of 3D dose file were produced by DOSXYZnrc. The simulated PDD and beam profile obtained were compared with that calculated using commissioning data. Good agreement was found between calculated PDD (1·1%) and beam profile using Monte Carlo simulation and commissioning data. After validation, TPR20,10, TMR and Sp values were calculated in five different field. Results Good agreement was found between calculated values by using Monte Carlo simulation and commissioning data. Average differences for five field sizes in this approach is about 0·83% for Sp. For TPR20,10 differences for field sizes 10 × 10 cm2 is 0·29% and for TMR in five field sizes, the average value is ~ 1·6%. Conclusion: In conclusion, the BEAMnrc and DOSXYZnrc codes package have very good accuracy in calculating dose distribution for 6 MV photon beam and it can be considered as a promising method for patient dose calculations and also the Monte Carlo model of primus linear accelerator built in this study can be used as method to calculate the dose distribution for cancer patients.
کلیدواژه‌های انگلیسی مقاله BEAMnrc, Linac, Monte Carlosimulation, Radiotherapy, TPR
نویسندگان مقاله | Mohammad Davoudi
Department of Medical Radiation Engineering, Central Tehran Branch, Islamic Azad University, Tehran


| Ali Shabestani Monfared
Professor of Medical Physics, Radiotherapy Physicist, Babolsar Oncology Hospital, Department of Medical Physics, Babol Univetsity of Medical Sciences, Babol, Iran.


| Mohammad Rahgoshay
Department of Nuclear Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran
نشانی اینترنتی http://ijmp.mums.ac.ir/article_13045.html
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