open access

Vol 24, No 4 (2019)
Original research articles
Published online: 2019-07-01
Submitted: 2018-02-19
Get Citation

Determination of initial electron parameters by means of Monte Carlo simulations for the Siemens Artiste Linac 6MV photon beam

Taylan Tuğrul, Osman Eroğul
DOI: 10.1016/j.rpor.2019.05.002
·
Rep Pract Oncol Radiother 2019;24(4):331-337.

open access

Vol 24, No 4 (2019)
Original research articles
Published online: 2019-07-01
Submitted: 2018-02-19

Abstract

Aim

In this study, we investigated initial electron parameters of Siemens Artiste Linac with 6MV photon beam using the Monte Carlo method.

Background

It is essential to define all the characteristics of initial electrons hitting the target, i.e. mean energy and full width of half maximum (FWHM) of the spatial distribution intensity, which is needed to run Monte Carlo simulations. The Monte Carlo is the most accurate method for simulation of radiotherapy treatments.

Materials and methods

Linac head geometry was modeled using the BEAMnrc code. The phase space files were used as input file to DOSXYZnrc simulation to determine the dose distribution in a water phantom. We obtained percent depth dose curves and the lateral dose profile. All the results were obtained at 100cm of SSD and for a 10×10cm2 field.

Results

We concluded that there existed a good conformity between Monte Carlo simulation and measurement data when we used electron mean energy of 6.3MeV and 0.30cm FWHM value as initial parameters. We observed that FWHM values had very little effect on PDD and we found that the electron mean energy and FWHM values affected the lateral dose profile. However, these effects are between tolerance values.

Conclusions

The initial parameters especially depend on components of a linac head. The phase space file which was obtained from Monte Carlo Simulation for a linac can be used as calculation of scattering, MLC leakage, to compare dose distribution on patients and in various studies.

Abstract

Aim

In this study, we investigated initial electron parameters of Siemens Artiste Linac with 6MV photon beam using the Monte Carlo method.

Background

It is essential to define all the characteristics of initial electrons hitting the target, i.e. mean energy and full width of half maximum (FWHM) of the spatial distribution intensity, which is needed to run Monte Carlo simulations. The Monte Carlo is the most accurate method for simulation of radiotherapy treatments.

Materials and methods

Linac head geometry was modeled using the BEAMnrc code. The phase space files were used as input file to DOSXYZnrc simulation to determine the dose distribution in a water phantom. We obtained percent depth dose curves and the lateral dose profile. All the results were obtained at 100cm of SSD and for a 10×10cm2 field.

Results

We concluded that there existed a good conformity between Monte Carlo simulation and measurement data when we used electron mean energy of 6.3MeV and 0.30cm FWHM value as initial parameters. We observed that FWHM values had very little effect on PDD and we found that the electron mean energy and FWHM values affected the lateral dose profile. However, these effects are between tolerance values.

Conclusions

The initial parameters especially depend on components of a linac head. The phase space file which was obtained from Monte Carlo Simulation for a linac can be used as calculation of scattering, MLC leakage, to compare dose distribution on patients and in various studies.

Get Citation

Keywords

Monte Carlo; Simulation; BEAMnrc; DOSXYZnrc; Artiste

About this article
Title

Determination of initial electron parameters by means of Monte Carlo simulations for the Siemens Artiste Linac 6MV photon beam

Journal

Reports of Practical Oncology and Radiotherapy

Issue

Vol 24, No 4 (2019)

Pages

331-337

Published online

2019-07-01

DOI

10.1016/j.rpor.2019.05.002

Bibliographic record

Rep Pract Oncol Radiother 2019;24(4):331-337.

Keywords

Monte Carlo
Simulation
BEAMnrc
DOSXYZnrc
Artiste

Authors

Taylan Tuğrul
Osman Eroğul

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