open access

Vol 25, No 5 (2020)
Original research articles
Published online: 2020-09-01
Submitted: 2020-01-28
Get Citation

Characterization of natural rubber as a bolus material for electron beam radiotherapy

Lukkana Apipunyasopon, Chalitpon Chaloeiparp, Thanayut Wiriyatharakij, Nakorn Phaisangittisakul
DOI: 10.1016/j.rpor.2020.06.006
·
Rep Pract Oncol Radiother 2020;25(5):725-729.

open access

Vol 25, No 5 (2020)
Original research articles
Published online: 2020-09-01
Submitted: 2020-01-28

Abstract

Background

Bolus is an accessory that is directly placed on the surface region to shift the radiation dose up to the skin during high energy photon and electron beam irradiations. The aim of this study was to mold the bolus using natural rubber material and assess both the physical and dosimetric characteristics.

Materials and methods

A natural rubber with additional plasticizer material was fabricated as a bolus sheet. The physical properties of natural rubber bolus sheets have been investigated using computed tomography (CT) images. Gafchromic EBT3 films were used to acquire the dose at depth of 0, 2, 3, and 3.5 cm for the 9-MeV therapeutic electron beam. A comparison of our natural rubber bolus sheets to the commercial bolus sheets was studied.

Results

The in-house natural rubber bolus sheets with the thickness of 0.32 and 0.52 cm were successfully made. Relative electron density of the two sheets was consistent with each other. However, similar to the commercial boluses, the natural rubber boluses were not provided with the same CT number over the whole sheet. Different bolus material gave different dose at the surface. Both material and thickness of the bolus showed a stronger impact on the dose beyond the depth of maximum dose.

Conclusion

Because of the density, simple fabrication, and vast availability, natural rubber material has an effective potential to be used as a bolus sheet in radiotherapy

Abstract

Background

Bolus is an accessory that is directly placed on the surface region to shift the radiation dose up to the skin during high energy photon and electron beam irradiations. The aim of this study was to mold the bolus using natural rubber material and assess both the physical and dosimetric characteristics.

Materials and methods

A natural rubber with additional plasticizer material was fabricated as a bolus sheet. The physical properties of natural rubber bolus sheets have been investigated using computed tomography (CT) images. Gafchromic EBT3 films were used to acquire the dose at depth of 0, 2, 3, and 3.5 cm for the 9-MeV therapeutic electron beam. A comparison of our natural rubber bolus sheets to the commercial bolus sheets was studied.

Results

The in-house natural rubber bolus sheets with the thickness of 0.32 and 0.52 cm were successfully made. Relative electron density of the two sheets was consistent with each other. However, similar to the commercial boluses, the natural rubber boluses were not provided with the same CT number over the whole sheet. Different bolus material gave different dose at the surface. Both material and thickness of the bolus showed a stronger impact on the dose beyond the depth of maximum dose.

Conclusion

Because of the density, simple fabrication, and vast availability, natural rubber material has an effective potential to be used as a bolus sheet in radiotherapy

Get Citation

Keywords

Bolus; Natural rubber; Relative electron density; Gafchromic EBT3 film

About this article
Title

Characterization of natural rubber as a bolus material for electron beam radiotherapy

Journal

Reports of Practical Oncology and Radiotherapy

Issue

Vol 25, No 5 (2020)

Pages

725-729

Published online

2020-09-01

DOI

10.1016/j.rpor.2020.06.006

Bibliographic record

Rep Pract Oncol Radiother 2020;25(5):725-729.

Keywords

Bolus
Natural rubber
Relative electron density
Gafchromic EBT3 film

Authors

Lukkana Apipunyasopon
Chalitpon Chaloeiparp
Thanayut Wiriyatharakij
Nakorn Phaisangittisakul

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