23–27 Oct 2017
Havana, Cuba
America/Havana timezone

Comparison between different Monte Carlo codes in the modeling of an Elekta Precisa linac head

Not scheduled
15m
Biblioteca Pública Rubén Martínez Villena

Biblioteca Pública Rubén Martínez Villena

Poster Medical Physics Poster Session - MP

Speaker

José Alejandro Fragoso Negrín (Instituto de Tecnologías y Ciencias Aplicadas, Universidad de La Habana (InSTEC-UH), La Habana, Cuba.)

Description

Several Monte Carlo (MC) codes are available for performing radiotherapy dose calculations, with acceptable accuracy. The objective of this work is to analyze the differences in the calculations obtained by different MC codes and their impact on the absorbed dose evaluations. In order to evaluate the possible systematic differences, a comparison was made between different electromagnetic physics packages of the Geant4 application for tomographic emission (GATE) 8 versus Monte Carlo N-Particle eXtended (MCNPX) 2.6 and Gamma electron shower (EGSnrc). To do this, we used a similar geometry for the three codes based on the linear accelerator (linac) head of an Elekta Precise for 6 MV photon beams used in standard therapies. Field sizes of 3 x 3 cm$^2$, 5 x 5 cm$^2$, 10 x 10 cm$^2$, 15 x 15 cm$^2$ and 20 x 20 cm$^2$ were considered. The reference values ​​of the percentage depth dose (PDD) and the beam profiles were obtained in the water phantom and in the ionization chamber.

Primary author

José Alejandro Fragoso Negrín (Instituto de Tecnologías y Ciencias Aplicadas, Universidad de La Habana (InSTEC-UH), La Habana, Cuba.)

Co-authors

Gabriel de la Fuente Rosales (Instituto de Tecnologías y Ciencias Aplicadas, Universidad de La Habana (InSTEC-UH), La Habana, Cuba.) César García Trápaga (Instituto de Tecnologías y Ciencias Aplicadas, Universidad de La Habana (InSTEC-UH), La Habana, Cuba.) Mr Rodolfo Alfonso Laguardia (Instituto de Tecnologías y Ciencias Aplicadas, Universidad de La Habana (InSTEC-UH), La Habana, Cuba.) Elier LARA (Instituto de Tecnologías y Ciencias Aplicadas, Universidad de La Habana (InSTEC-UH), La Habana, Cuba.)

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