Validation of BEAMnrc Monte Carlo model for a 12 MV photon beam

Mohammed, Maged; Bardouni, T. El; Chakir, E.; Saeed, M.; Zain, Jamal Al; Lahdour, M.

doi:10.1016/j.jksus.2017.07.001

Cited by 11 publications

(6 citation statements)

References 11 publications

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“…We also noted that different FHWM values did not show significant effect on PDD. Mohammed et al 3 utilized IQ and gamma index criteria to find initial electron mean energy and FWHM value. In this study, we used these criteria to find initial electron parameters.…”

Section: Discussionmentioning

confidence: 99%

“…The dose distributions for PDD and beam lateral dose profile were calculated in a 30 × 30 × 30 cm 3 water phantom which was located at a source to surface distance (SSD) of 100 cm. The voxel size was 0.2 × 0.2 × 0.2 cm 3 . DOSXYZnrc parameters such as ECUT and PCUT were 0.7 MeV and 0.01 MeV, respectively.…”

Section: Methodsmentioning

confidence: 99%

“…For correct PDD and lateral dose profile; Quality Index (QI), gamma index criteria and maximum dose depth were considered. [3][4][5][6][7][8][9][10][11][12][13][14]…”

Section: Methodsmentioning

confidence: 99%

“…The difficult stage that users encounter in radiation therapy is to specify initial electron parameters. [3][4][5][6][7][8][9][10][11] Errors in the radiation source description are directly caused through dose calculation. 17 For to run Monte Carlo code It is essential to define all the characteristics of photon beam such as: initial electron mean energy and full width of half maximum (FWHM) of the intensity distribution of these primary electrons that stimulate the target of a Linear accelerator.…”

Section: Introductionmentioning

confidence: 99%

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

Tuğrul

Eroğul

2019

Reports of Practical Oncology & Radiotherapy

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In this study, we investigated initial electron parameters of Siemens Artiste Linac with 6 MV 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 100 cm of SSD and for a 10 × 10 cm 2 field.Results: We concluded that there existed a good conformity between Monte Carlo simulation and measurement data when we used electron mean energy of 6.3 MeV and 0.30 cm 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.

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Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

“…For correct PDD and lateral dose profile; Quality Index (QI), gamma index criteria and maximum dose depth were considered. [3][4][5][6][7][8][9][10][11][12][13][14]…”

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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

Tuğrul

Eroğul

2019

Reports of Practical Oncology & Radiotherapy

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“…10 BEAMnrc code (a subset code in the EGSnrc package) has an option for decreasing simulation uncertainties or times. 11,12 Directional bremsstrahlung splitting (DBS) is a technique that aims to reduce the simulation uncertainty, where the photons are split at the time of creation. DBS technique is the one that applies braking radiation in a collision.…”

Section: Assessing the Effect Of Directional Bremsstrahlung Splitting...mentioning

confidence: 99%

Assessing the Effect of Directional Bremsstrahlung Splitting on the Output Spectra and Parameters Using BEAMnrc Monte Carlo Simulation Package

Babapour

Semyari

Yadollahi

et al. 2022

Biomed Eng Comput Biol

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Introduction: EGSnrc software package is one of the computational packages for Monte Carlo simulation in radiation therapy and has several subset codes. Directional bremsstrahlung splitting (DBS) is a technique that applies braking radiations in interactions in this software. This study aimed to evaluate the effect of this technique on the simulation time, uncertainty, particle number of phase-space data, and photon beam spectrum resulting from a medical linear accelerator (LINAC). Materials and methods: The gantry of the accelerator, including the materials and geometries of different parts, was simulated using the BEAMnrc code (a subset code in the EGSnrc package). The phase-space data were recorded in different parts of the LINAC. The DBS values (1, 10, 100, and 1000) were changed, and their effects were evaluated on the simulation parameters and output spectra. Results: Increasing the DBS value from 1 to 1000 resulted in an increase in the simulation time from 1.778 to 11.310 hours, and increasing the number of particles in the phase-space plane (5 590 732-180 328 382). When the DBS had been picked up from 1 to 100, the simulation uncertainty decreased by about 1.29%. In addition, the DBS increment value from 100 to 1000 leads to an increase in uncertainty and simulation time of about 0.71% and 315%, respectively. Conclusion: Although using the DBS technique reduces the simulation time or uncertainty, increasing the DBS from a specific value, equal to 100 in our study, increases simulation uncertainties and times. Therefore, we propose considering a specific DBS value as we obtained for the Monte Carlo simulation of photon beams produced by linear accelerators.

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Validation of GAMOS code based on Geant4 Monte Carlo for a 12 MV Saturne43 Linac

Zain

Bardouni

Mohammed

et al. 2019

Journal of King Saud University - Science

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Validation of BEAMnrc Monte Carlo model for a 12 MV photon beam

Cited by 11 publications

References 11 publications

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

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

Assessing the Effect of Directional Bremsstrahlung Splitting on the Output Spectra and Parameters Using BEAMnrc Monte Carlo Simulation Package

Validation of GAMOS code based on Geant4 Monte Carlo for a 12 MV Saturne43 Linac

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Validation of BEAMnrc Monte Carlo model for a 12 MV photon beam

Cited by 11 publications

References 11 publications

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

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

Assessing the Effect of Directional Bremsstrahlung Splitting on the Output Spectra and Parameters Using BEAMnrc Monte Carlo Simulation Package

Validation of GAMOS code based on Geant4 Monte Carlo for a 12 MV Saturne43 Linac

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Validation of GAMOS code based on Geant4 Monte Carlo for a 12 MV Saturne43 Linac