open access

Vol 25, No 6 (2020)
Original research articles
Published online: 2020-11-01
Submitted: 2020-04-23
Get Citation

Validation of Monte carlo Geant4 multithreading code for a 6 MV photon beam of varian linac on the grid computing

Mustapha Assalmi, El Yamani Diaf, Najim Mansour
DOI: 10.1016/j.rpor.2020.09.011
·
Rep Pract Oncol Radiother 2020;25(6):1001-1010.

open access

Vol 25, No 6 (2020)
Original research articles
Published online: 2020-11-01
Submitted: 2020-04-23

Abstract

Aim

To evaluate the computation time efficiency of the multithreaded code (G4Linac-MT) in the dosimetry application, using the high performance of the HPC-Marwan grid to determine with high accuracy the initial parameters of the 6 MV photon beam of Varian CLINAC 2100C.

Background

The difficulty of Monte Carlo methods is the long computation time, this is one of the disadvantages of the Monte Carlo methods.

Materials and methods

Calculations are performed by the multithreaded code G4Linac-MT and Geant4.10.04.p02 using the HPC-Marwan computing grid to evaluate the computing speed for each code. The multithreaded version is tested in several CPUs to evaluate the computing speed according to the number of CPUs used. The results were compared to the measurements using different types of comparisons, TPR20.10, penumbra, mean dose error and gamma index.

Results

The results obtained for this work indicate a much higher computing time saving for the G4Linac-MT version compared to the Geant4.10.04 version, the computing time decreases with the number of CPUs used, can reach about 12 times if 64CPUs are used. After optimization of the initial electron beam parameters, the results of the dose simulations obtained for this work are in very good agreement with the experimental measurements with a mean dose error of up to 0.41% on the PDDs and 1.79% on the lateral dose.

Conclusions

The gain in computation time leads us to perform Monte Carlo simulations with a large number of events which gives a high accuracy of the dosimetry results obtained in this work.

Abstract

Aim

To evaluate the computation time efficiency of the multithreaded code (G4Linac-MT) in the dosimetry application, using the high performance of the HPC-Marwan grid to determine with high accuracy the initial parameters of the 6 MV photon beam of Varian CLINAC 2100C.

Background

The difficulty of Monte Carlo methods is the long computation time, this is one of the disadvantages of the Monte Carlo methods.

Materials and methods

Calculations are performed by the multithreaded code G4Linac-MT and Geant4.10.04.p02 using the HPC-Marwan computing grid to evaluate the computing speed for each code. The multithreaded version is tested in several CPUs to evaluate the computing speed according to the number of CPUs used. The results were compared to the measurements using different types of comparisons, TPR20.10, penumbra, mean dose error and gamma index.

Results

The results obtained for this work indicate a much higher computing time saving for the G4Linac-MT version compared to the Geant4.10.04 version, the computing time decreases with the number of CPUs used, can reach about 12 times if 64CPUs are used. After optimization of the initial electron beam parameters, the results of the dose simulations obtained for this work are in very good agreement with the experimental measurements with a mean dose error of up to 0.41% on the PDDs and 1.79% on the lateral dose.

Conclusions

The gain in computation time leads us to perform Monte Carlo simulations with a large number of events which gives a high accuracy of the dosimetry results obtained in this work.

Get Citation

Keywords

Monte carlo; Grid computing; Dose; Medical accelerator; Photon beams; Geant4; G4Linac-MT; Multithreaded

About this article
Title

Validation of Monte carlo Geant4 multithreading code for a 6 MV photon beam of varian linac on the grid computing

Journal

Reports of Practical Oncology and Radiotherapy

Issue

Vol 25, No 6 (2020)

Pages

1001-1010

Published online

2020-11-01

DOI

10.1016/j.rpor.2020.09.011

Bibliographic record

Rep Pract Oncol Radiother 2020;25(6):1001-1010.

Keywords

Monte carlo
Grid computing
Dose
Medical accelerator
Photon beams
Geant4
G4Linac-MT
Multithreaded

Authors

Mustapha Assalmi
El Yamani Diaf
Najim Mansour

Important: This website uses cookies. More >>

The cookies allow us to identify your computer and find out details about your last visit. They remembering whether you've visited the site before, so that you remain logged in - or to help us work out how many new website visitors we get each month. Most internet browsers accept cookies automatically, but you can change the settings of your browser to erase cookies or prevent automatic acceptance if you prefer.

By "Via Medica sp. z o.o." sp.k., ul. Świętokrzyska 73, 80–180 Gdańsk, Poland
tel.:+48 58 320 94 94, fax:+48 58 320 94 60, e-mail: journals@viamedica.pl