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Evaluation and Comparison of Dosimetric Characteristics of Semiflex(®)3D and Microdiamond in Relative Dosimetry under 6 and 15 MV Photon Beams in Small Fields
BACKGROUND: In modern radiotherapy techniques, the frequently small and non-uniformed fields can increase treatment efficiency due to their highly conformal dose distribution. Particular features including lack of Lateral Charge Particle Equilibrium (LCPE) lead to detectors with high resolution sinc...
Autores principales: | , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
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Shiraz University of Medical Sciences
2022
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9589081/ https://www.ncbi.nlm.nih.gov/pubmed/36313410 http://dx.doi.org/10.31661/jbpe.v0i0.2008-1160 |
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author | Momeni Harzanji, Zahra Larizadeh, Mohammad Hassan Namiranian, Nasim Nickfarjam, Abolfazl |
author_facet | Momeni Harzanji, Zahra Larizadeh, Mohammad Hassan Namiranian, Nasim Nickfarjam, Abolfazl |
author_sort | Momeni Harzanji, Zahra |
collection | PubMed |
description | BACKGROUND: In modern radiotherapy techniques, the frequently small and non-uniformed fields can increase treatment efficiency due to their highly conformal dose distribution. Particular features including lack of Lateral Charge Particle Equilibrium (LCPE) lead to detectors with high resolution since any error in obtained dosimetric data could cause patient mistreatments. OBJECTIVE: This study aims to evaluate and compare two small detectors (Semiflex(®)3D and microdiamond) dosimetric characteristics in small field relative dosimetry. MATERIAL AND METHODS: In this experimental study, the dosimetric properties of Semiflex(®)3D and microdiamond were assessed under 6 and 15 MV photon beams. The linearity and stability of the detector’s response and dose rate were measured. Square-field sizes ranging from 0.6×0.6 - 5×5 cm(2) were used for obtaining percentage depth dose curves (PDDs) and in-plane profiles. The angular and temperature dependence of both detectors’ responses were also studied. RESULTS: The detector response shows good stability, no deviation from linearity, and low dose rate dependence (≤1.6%). PDDs and in-plan profiles of both detectors are in good agreement and no significant difference was observed except for the high dose gradient regions (P-value≤0.017). Both detectors demonstrated low angular dependence (<0.3%) with temperature dependence lower than 1% for both detectors. CONCLUSION: The results indicate both investigated detectors were well performed in small field relative dosimetry and for measuring penumbra, it is better to use microdiamond detector. |
format | Online Article Text |
id | pubmed-9589081 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | Shiraz University of Medical Sciences |
record_format | MEDLINE/PubMed |
spelling | pubmed-95890812022-10-28 Evaluation and Comparison of Dosimetric Characteristics of Semiflex(®)3D and Microdiamond in Relative Dosimetry under 6 and 15 MV Photon Beams in Small Fields Momeni Harzanji, Zahra Larizadeh, Mohammad Hassan Namiranian, Nasim Nickfarjam, Abolfazl J Biomed Phys Eng Original Article BACKGROUND: In modern radiotherapy techniques, the frequently small and non-uniformed fields can increase treatment efficiency due to their highly conformal dose distribution. Particular features including lack of Lateral Charge Particle Equilibrium (LCPE) lead to detectors with high resolution since any error in obtained dosimetric data could cause patient mistreatments. OBJECTIVE: This study aims to evaluate and compare two small detectors (Semiflex(®)3D and microdiamond) dosimetric characteristics in small field relative dosimetry. MATERIAL AND METHODS: In this experimental study, the dosimetric properties of Semiflex(®)3D and microdiamond were assessed under 6 and 15 MV photon beams. The linearity and stability of the detector’s response and dose rate were measured. Square-field sizes ranging from 0.6×0.6 - 5×5 cm(2) were used for obtaining percentage depth dose curves (PDDs) and in-plane profiles. The angular and temperature dependence of both detectors’ responses were also studied. RESULTS: The detector response shows good stability, no deviation from linearity, and low dose rate dependence (≤1.6%). PDDs and in-plan profiles of both detectors are in good agreement and no significant difference was observed except for the high dose gradient regions (P-value≤0.017). Both detectors demonstrated low angular dependence (<0.3%) with temperature dependence lower than 1% for both detectors. CONCLUSION: The results indicate both investigated detectors were well performed in small field relative dosimetry and for measuring penumbra, it is better to use microdiamond detector. Shiraz University of Medical Sciences 2022-10-01 /pmc/articles/PMC9589081/ /pubmed/36313410 http://dx.doi.org/10.31661/jbpe.v0i0.2008-1160 Text en Copyright: © Journal of Biomedical Physics and Engineering https://creativecommons.org/licenses/by-nc/4.0/This is an Open Access article distributed under the terms of the Creative Commons Attribution-NonCommercial 4.0 Unported License, ( http://creativecommons.org/licenses/by-nc/4.0/ (https://creativecommons.org/licenses/by-nc/4.0/) ) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. |
spellingShingle | Original Article Momeni Harzanji, Zahra Larizadeh, Mohammad Hassan Namiranian, Nasim Nickfarjam, Abolfazl Evaluation and Comparison of Dosimetric Characteristics of Semiflex(®)3D and Microdiamond in Relative Dosimetry under 6 and 15 MV Photon Beams in Small Fields |
title | Evaluation and Comparison of Dosimetric Characteristics of Semiflex(®)3D and Microdiamond in Relative Dosimetry under 6 and 15 MV Photon Beams in Small Fields |
title_full | Evaluation and Comparison of Dosimetric Characteristics of Semiflex(®)3D and Microdiamond in Relative Dosimetry under 6 and 15 MV Photon Beams in Small Fields |
title_fullStr | Evaluation and Comparison of Dosimetric Characteristics of Semiflex(®)3D and Microdiamond in Relative Dosimetry under 6 and 15 MV Photon Beams in Small Fields |
title_full_unstemmed | Evaluation and Comparison of Dosimetric Characteristics of Semiflex(®)3D and Microdiamond in Relative Dosimetry under 6 and 15 MV Photon Beams in Small Fields |
title_short | Evaluation and Comparison of Dosimetric Characteristics of Semiflex(®)3D and Microdiamond in Relative Dosimetry under 6 and 15 MV Photon Beams in Small Fields |
title_sort | evaluation and comparison of dosimetric characteristics of semiflex(®)3d and microdiamond in relative dosimetry under 6 and 15 mv photon beams in small fields |
topic | Original Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9589081/ https://www.ncbi.nlm.nih.gov/pubmed/36313410 http://dx.doi.org/10.31661/jbpe.v0i0.2008-1160 |
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