open access

Vol 17, No 4 (2012)
Original research articles
Published online: 2012-07-01
Submitted: 2011-11-14
Get Citation

Multiple-source models for electron beams of a medical linear accelerator using BEAMDP computer code

Nasrollah Jabbari, Amir Hoshang Barati, Leili Rahmatnezhad
DOI: 10.1016/j.rpor.2012.04.003
·
Rep Pract Oncol Radiother 2012;17(4):211-219.

open access

Vol 17, No 4 (2012)
Original research articles
Published online: 2012-07-01
Submitted: 2011-11-14

Abstract

Aim

The aim of this work was to develop multiple-source models for electron beams of the NEPTUN 10PC medical linear accelerator using the BEAMDP computer code.

Background

One of the most accurate techniques of radiotherapy dose calculation is the Monte Carlo (MC) simulation of radiation transport, which requires detailed information of the beam in the form of a phase-space file. The computing time required to simulate the beam data and obtain phase-space files from a clinical accelerator is significant. Calculation of dose distributions using multiple-source models is an alternative method to phase-space data as direct input to the dose calculation system.

Materials and methods

Monte Carlo simulation of accelerator head was done in which a record was kept of the particle phase-space regarding the details of the particle history. Multiple-source models were built from the phase-space files of Monte Carlo simulations. These simplified beam models were used to generate Monte Carlo dose calculations and to compare those calculations with phase-space data for electron beams.

Results

Comparison of the measured and calculated dose distributions using the phase-space files and multiple-source models for three electron beam energies showed that the measured and calculated values match well each other throughout the curves.

Conclusion

It was found that dose distributions calculated using both the multiple-source models and the phase-space data agree within 1.3%, demonstrating that the models can be used for dosimetry research purposes and dose calculations in radiotherapy.

Abstract

Aim

The aim of this work was to develop multiple-source models for electron beams of the NEPTUN 10PC medical linear accelerator using the BEAMDP computer code.

Background

One of the most accurate techniques of radiotherapy dose calculation is the Monte Carlo (MC) simulation of radiation transport, which requires detailed information of the beam in the form of a phase-space file. The computing time required to simulate the beam data and obtain phase-space files from a clinical accelerator is significant. Calculation of dose distributions using multiple-source models is an alternative method to phase-space data as direct input to the dose calculation system.

Materials and methods

Monte Carlo simulation of accelerator head was done in which a record was kept of the particle phase-space regarding the details of the particle history. Multiple-source models were built from the phase-space files of Monte Carlo simulations. These simplified beam models were used to generate Monte Carlo dose calculations and to compare those calculations with phase-space data for electron beams.

Results

Comparison of the measured and calculated dose distributions using the phase-space files and multiple-source models for three electron beam energies showed that the measured and calculated values match well each other throughout the curves.

Conclusion

It was found that dose distributions calculated using both the multiple-source models and the phase-space data agree within 1.3%, demonstrating that the models can be used for dosimetry research purposes and dose calculations in radiotherapy.

Get Citation

Keywords

Electron therapy; Multiple-source model; Treatment planning; Linac

About this article
Title

Multiple-source models for electron beams of a medical linear accelerator using BEAMDP computer code

Journal

Reports of Practical Oncology and Radiotherapy

Issue

Vol 17, No 4 (2012)

Pages

211-219

Published online

2012-07-01

DOI

10.1016/j.rpor.2012.04.003

Bibliographic record

Rep Pract Oncol Radiother 2012;17(4):211-219.

Keywords

Electron therapy
Multiple-source model
Treatment planning
Linac

Authors

Nasrollah Jabbari
Amir Hoshang Barati
Leili Rahmatnezhad

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