Regional Symposium on Innovation in science and technology

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Monte Carlo modelling of Siemens Artiste linac head and the 160 MLC and assessment of dose maps for IMRT and 3D-CRT plans

Authors :

Hashem Miri-Hakimabad¹ Elie Hoseinian-Azghadi² Laleh Rafat-Motavalli³ Taylan Tuğrul⁴ Niloofar Rafat-Motavalli⁵ Vida Khodabandeh-Baygi⁶ Mahdieh Dayyani⁷

1- دانشگاه فردوسی مشهد 2- مرکز تخصصی رایوتراپی و انکولوژی رضا 3- دانشگاه فردوسی مشهد 4- Van Yuzuncu Yil University 5- دانشگاه فردوسی مشهد 6- دانشگاه فردوسی مشهد 7- دانشگاه فردوسی مشهد

Keywords :

Monte Carlo،Verification tool،Dose calculation،IMRT،3D-CRT

Abstract :

Monte Carlo (MC) methods are considered as the most accurate dose calculation method and a gold standard for dose assessment in radiation therapy. The purpose of this study is to fully simulate a benchmarked Artiste head and the Siemens 160 multileaf collimator (MLC) by MCNPX 2.6 Monte Carlo code. A comparison between MC-based and TPS-based dose maps was made for beams of two typical plans and it was shown that the 3D gamma passing rates with clinical criteria of 3%/3mm are acceptable. Therefore, the provided model has sufficient accuracy and reasonable computation time to be used for verification of complicated plans.

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