open access

Vol 25, No 1 (2020)
Original research articles
Published online: 2020-01-01
Submitted: 2019-07-02
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Dosimetric investigation of a new high dose rate Ir brachytherapy source, IRAsource, by Monte Carlo method

Atefeh Rostami, Mahdi Hoseini, Mahdi Ghorbani, Courtney Knaup
DOI: 10.1016/j.rpor.2019.12.022
·
Rep Pract Oncol Radiother 2020;25(1):139-145.

open access

Vol 25, No 1 (2020)
Original research articles
Published online: 2020-01-01
Submitted: 2019-07-02

Abstract

Purpose

The purpose of the present study was to perform an independent calculation of dosimetric parameters associated with a new 192Ir brachytherapy source model, IRAsource.

Materials and methods

The parameters of air kerma strength (AKS), dose rate constant (DRC), geometry function (GF), radial dose function (RDF), as well as two-dimensional (2D) anisotropy function (AF) of IRAsource 192Ir source model were calculated in this study. The MC n-particle extended (MCNPX) code was also employed for simulating high dose rate (HDR), IRAsource and 192Ir source; and formalism was used for calculating dosimetry parameters based on task group number 43 updated report (TG-43 U1).

Results

The results of this study were consistent with the ones reported about the IRAsource source by Sarabiasl et al. The AKS per 1mCi activity and the DRC values were also equal to 3.65 cGycm2h–1mCi–1 and 1.094 cGyh–1U–1; respectively. The comparison of the results of the DRC and the RDF reported by Sarabiasl et al. also validated the 192Ir IRAsource simulation in this study. Moreover, the AFs of IRAsource source model were in a good agreement with those of Sarabiasl et al. at different distances, which could be attributed to identical geometries.

Conclusion

In line with those reported by Sarabiasl et al., the results of this study confirmed the IRAsource 192Ir source for clinical uses. The calculated dosimetric parameters of the IRAsource source could be utilized in clinical practices as input data sets or for validation of treatment planning system calculations.

Abstract

Purpose

The purpose of the present study was to perform an independent calculation of dosimetric parameters associated with a new 192Ir brachytherapy source model, IRAsource.

Materials and methods

The parameters of air kerma strength (AKS), dose rate constant (DRC), geometry function (GF), radial dose function (RDF), as well as two-dimensional (2D) anisotropy function (AF) of IRAsource 192Ir source model were calculated in this study. The MC n-particle extended (MCNPX) code was also employed for simulating high dose rate (HDR), IRAsource and 192Ir source; and formalism was used for calculating dosimetry parameters based on task group number 43 updated report (TG-43 U1).

Results

The results of this study were consistent with the ones reported about the IRAsource source by Sarabiasl et al. The AKS per 1mCi activity and the DRC values were also equal to 3.65 cGycm2h–1mCi–1 and 1.094 cGyh–1U–1; respectively. The comparison of the results of the DRC and the RDF reported by Sarabiasl et al. also validated the 192Ir IRAsource simulation in this study. Moreover, the AFs of IRAsource source model were in a good agreement with those of Sarabiasl et al. at different distances, which could be attributed to identical geometries.

Conclusion

In line with those reported by Sarabiasl et al., the results of this study confirmed the IRAsource 192Ir source for clinical uses. The calculated dosimetric parameters of the IRAsource source could be utilized in clinical practices as input data sets or for validation of treatment planning system calculations.

Get Citation

Keywords

Brachytherapy; Dosimetric parameters; IRAsource source; MCNPX

About this article
Title

Dosimetric investigation of a new high dose rate Ir brachytherapy source, IRAsource, by Monte Carlo method

Journal

Reports of Practical Oncology and Radiotherapy

Issue

Vol 25, No 1 (2020)

Pages

139-145

Published online

2020-01-01

DOI

10.1016/j.rpor.2019.12.022

Bibliographic record

Rep Pract Oncol Radiother 2020;25(1):139-145.

Keywords

Brachytherapy
Dosimetric parameters
IRAsource source
MCNPX

Authors

Atefeh Rostami
Mahdi Hoseini
Mahdi Ghorbani
Courtney Knaup

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