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Soft tissue and water substitutes for megavoltage photon beams: An EGSnrc‐based evaluation
In this work, soft‐tissue equivalence of water, polystyrene, PMMA and water equivalence of polystyrene, and PMMA has been assessed for multiple megavoltage photon beams and field sizes. EGSnrc based Monte Carlo (MC) codes, BEAMnrc and DOSXYZnrc are used for the linac head modeling and the phantom do...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
John Wiley and Sons Inc.
2016
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5690209/ https://www.ncbi.nlm.nih.gov/pubmed/26894338 http://dx.doi.org/10.1120/jacmp.v17i1.5700 |
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author | Aslam, Ambreen Kakakhel, Muhammad Basim Shahid, Shaukat Ali Younas, Lubna Zareen, Sobia |
author_facet | Aslam, Ambreen Kakakhel, Muhammad Basim Shahid, Shaukat Ali Younas, Lubna Zareen, Sobia |
author_sort | Aslam, Ambreen |
collection | PubMed |
description | In this work, soft‐tissue equivalence of water, polystyrene, PMMA and water equivalence of polystyrene, and PMMA has been assessed for multiple megavoltage photon beams and field sizes. EGSnrc based Monte Carlo (MC) codes, BEAMnrc and DOSXYZnrc are used for the linac head modeling and the phantom dose calculations, respectively. Percentage depth doses (PDDs) are scored for two field sizes ([Formula: see text] , [Formula: see text]) and photon energies (6 MV and 10 MV) in water, polystyrene, PMMA, and soft tissue. The comparisons of PDDs show that soft‐tissue equivalence of various materials varies with the depth in the phantom, field size, and photon energy. Water and PMMA are found to be the closest soft‐tissue and water substitutes, respectively. Soft‐tissue and water equivalence of dosimetry materials need to be evaluated for a range of photon energies and field sizes before their application in complex radiation beams. PACS numbers: 87.55.Gh, 87.55.K‐ |
format | Online Article Text |
id | pubmed-5690209 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2016 |
publisher | John Wiley and Sons Inc. |
record_format | MEDLINE/PubMed |
spelling | pubmed-56902092018-04-02 Soft tissue and water substitutes for megavoltage photon beams: An EGSnrc‐based evaluation Aslam, Ambreen Kakakhel, Muhammad Basim Shahid, Shaukat Ali Younas, Lubna Zareen, Sobia J Appl Clin Med Phys Technical Notes In this work, soft‐tissue equivalence of water, polystyrene, PMMA and water equivalence of polystyrene, and PMMA has been assessed for multiple megavoltage photon beams and field sizes. EGSnrc based Monte Carlo (MC) codes, BEAMnrc and DOSXYZnrc are used for the linac head modeling and the phantom dose calculations, respectively. Percentage depth doses (PDDs) are scored for two field sizes ([Formula: see text] , [Formula: see text]) and photon energies (6 MV and 10 MV) in water, polystyrene, PMMA, and soft tissue. The comparisons of PDDs show that soft‐tissue equivalence of various materials varies with the depth in the phantom, field size, and photon energy. Water and PMMA are found to be the closest soft‐tissue and water substitutes, respectively. Soft‐tissue and water equivalence of dosimetry materials need to be evaluated for a range of photon energies and field sizes before their application in complex radiation beams. PACS numbers: 87.55.Gh, 87.55.K‐ John Wiley and Sons Inc. 2016-01-08 /pmc/articles/PMC5690209/ /pubmed/26894338 http://dx.doi.org/10.1120/jacmp.v17i1.5700 Text en © 2016 The Authors. This is an open access article under the terms of the Creative Commons Attribution (http://creativecommons.org/licenses/by/3.0/) License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. |
spellingShingle | Technical Notes Aslam, Ambreen Kakakhel, Muhammad Basim Shahid, Shaukat Ali Younas, Lubna Zareen, Sobia Soft tissue and water substitutes for megavoltage photon beams: An EGSnrc‐based evaluation |
title | Soft tissue and water substitutes for megavoltage photon beams: An EGSnrc‐based evaluation |
title_full | Soft tissue and water substitutes for megavoltage photon beams: An EGSnrc‐based evaluation |
title_fullStr | Soft tissue and water substitutes for megavoltage photon beams: An EGSnrc‐based evaluation |
title_full_unstemmed | Soft tissue and water substitutes for megavoltage photon beams: An EGSnrc‐based evaluation |
title_short | Soft tissue and water substitutes for megavoltage photon beams: An EGSnrc‐based evaluation |
title_sort | soft tissue and water substitutes for megavoltage photon beams: an egsnrc‐based evaluation |
topic | Technical Notes |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5690209/ https://www.ncbi.nlm.nih.gov/pubmed/26894338 http://dx.doi.org/10.1120/jacmp.v17i1.5700 |
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