Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.21/2987
Título: Assesing multileaf collimator effect on the build-up region using Monte Carlo method
Autor: Zarza-Moreno, M.
Teixeira, Nuno
Jesus, A. P.
Mora, G.
Palavras-chave: Physics
Surface dose
Build-up dose
Monte Carlo
Data: 2008
Citação: Zarza-Moreno M, Teixeira N, Jesus AP, Mora G. Assesing multileaf collimator effect on the build-up region using Monte Carlo method. Pol J Med Phys Eng. 2008;14(3):163-82.
Resumo: Previous Monte Carlo studies have investigated the multileaf collimator (MLC) contribution to the build-up region for fields in which the MLC leaves were fully blocking the openings defined by the collimation jaws. In the present work, we investigate the same effect but for symmetric and asymmetric MLC defined field sizes (2×2, 4×4, 10×10 and 3×7 cm2). A Varian 2100C/D accelerator with 120-leaf MLC is accurately modeled fora6MVphoton beam using the BEAMnrc/EGSnrc code. Our results indicate that particles scattered from accelerator head and MLC are responsible for the increase of about 7% on the surface dose when comparing 2×2 and 10×10 cm2 fields. We found that the MLC contribution to the total build-up dose is about 2% for the 2×2 cm2 field and less than 1% for the largest fields.
Peer review: yes
URI: http://hdl.handle.net/10400.21/2987
ISSN: 1425-4689
Versão do Editor: http://www.degruyter.com/view/j/pjmpe.2008.14.issue-3/v10013-008-0014-0/v10013-008-0014-0.xml?format=INT
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