Establishing the impact of temporary tissue expanders on electron and photon beam dose distributions

Asena, Andre, Kairn, Tanya, Crowe, Scott, & Trapp, Jamie (2015) Establishing the impact of temporary tissue expanders on electron and photon beam dose distributions. Physica Medica: European Journal of Medical Physics, 31(3), pp. 281-285.

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Purpose: This study investigates the effects of temporary tissue expanders (TTEs) on the dose distributions in breast cancer radiotherapy treatments under a variety of conditions.

Methods: Using EBT2 radiochromic film, both electron and photon beam dose distribution measurements were made for different phantoms, and beam geometries. This was done to establish a more comprehensive understanding of the implant’s perturbation effects under a wider variety of conditions.

Results: The magnetic disk present in a tissue expander causes a dose reduction of approximately 20% in a photon tangent treatment and 56% in electron boost fields immediately downstream of the implant. The effects of the silicon elastomer are also much more apparent in an electron beam than a photon beam.

Conclusions: Evidently, each component of the TTE attenuates the radiation beam to different degrees. This study has demonstrated that the accuracy of photon and electron treatments of post-mastectomy patients is influenced by the presence of a tissue expander for various beam orientations. The impact of TTEs on dose distributions establishes the importance of an accurately modelled high-density implant in the treatment planning system for post-mastectomy patients.

Impact and interest:

3 citations in Scopus
3 citations in Web of Science®
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ID Code: 80851
Item Type: Journal Article
Refereed: Yes
Additional URLs:
Keywords: high density, radiotherapy, tissue expander, dose distribution
DOI: 10.1016/j.ejmp.2015.01.015
ISSN: 1120-1797
Subjects: Australian and New Zealand Standard Research Classification > PHYSICAL SCIENCES (020000) > OTHER PHYSICAL SCIENCES (029900) > Medical Physics (029903)
Divisions: Current > Schools > School of Chemistry, Physics & Mechanical Engineering
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Copyright Owner: Copyright 2015 Elsevier Ltd
Copyright Statement: NOTICE: this is the author’s version of a work that was accepted for publication in Physica Medica: European Journal of Medical Physics. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Physica Medica: European Journal of Medical Physics, [VOL#, ISSUE#, (DATE)] DOI#ÂÂÂÂÂÂÂÂÂÂÂÂÂ�
Deposited On: 21 Jan 2015 23:16
Last Modified: 06 Sep 2016 03:13

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