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Measurement of the strength of iodine-125 seed moving at unknown speed during implantation in brachytherapy
The aim of this study is to demonstrate the feasibility of estimating the strength of the moving radiation source during patient implantation. The requirement for the counting time was investigated by comparing the results of the measurements for the static source with those for the source moving at...
Autores principales: | , , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Oxford University Press
2014
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3885120/ https://www.ncbi.nlm.nih.gov/pubmed/23816530 http://dx.doi.org/10.1093/jrr/rrt087 |
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author | Tanaka, Kenichi Endo, Satoru Tateoka, Kunihiko Asanuma, Osamu Kamo, Ken-ichi Sato, Kaori Takeda, Hiromitsu Takagi, Masaru Hareyama, Masato Takada, Jun |
author_facet | Tanaka, Kenichi Endo, Satoru Tateoka, Kunihiko Asanuma, Osamu Kamo, Ken-ichi Sato, Kaori Takeda, Hiromitsu Takagi, Masaru Hareyama, Masato Takada, Jun |
author_sort | Tanaka, Kenichi |
collection | PubMed |
description | The aim of this study is to demonstrate the feasibility of estimating the strength of the moving radiation source during patient implantation. The requirement for the counting time was investigated by comparing the results of the measurements for the static source with those for the source moving at 2, 5, 10 and 20 cm s(−1). The utilized source was (125)I with an air-kerma strength of 0.432 U (μGym(2)h(–1)). The detector utilized was a plastic scintillation detector (8 cm × 5 cm × 2 cm in thickness) set at 8 cm away from the needle to guide the source. Experiments were conducted in order to determine the most desirable counting time. Analysis using the maximum of the measured values while the source passed through the needle indicated that the results for the moving source increased more than those for the static source as the counting time decreased. The combined standard uncertainty, with the coverage factor of 1, was within 4% at the counting time of 100 ms. This investigation supported the feasibility of the method proposed for estimating the source strength during the implantation procedure, regardless of the source speed. The method proposed is a potential option for reducing the risk of accidental replacements of sources with those of incorrect strengths. |
format | Online Article Text |
id | pubmed-3885120 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2014 |
publisher | Oxford University Press |
record_format | MEDLINE/PubMed |
spelling | pubmed-38851202014-01-08 Measurement of the strength of iodine-125 seed moving at unknown speed during implantation in brachytherapy Tanaka, Kenichi Endo, Satoru Tateoka, Kunihiko Asanuma, Osamu Kamo, Ken-ichi Sato, Kaori Takeda, Hiromitsu Takagi, Masaru Hareyama, Masato Takada, Jun J Radiat Res Technology The aim of this study is to demonstrate the feasibility of estimating the strength of the moving radiation source during patient implantation. The requirement for the counting time was investigated by comparing the results of the measurements for the static source with those for the source moving at 2, 5, 10 and 20 cm s(−1). The utilized source was (125)I with an air-kerma strength of 0.432 U (μGym(2)h(–1)). The detector utilized was a plastic scintillation detector (8 cm × 5 cm × 2 cm in thickness) set at 8 cm away from the needle to guide the source. Experiments were conducted in order to determine the most desirable counting time. Analysis using the maximum of the measured values while the source passed through the needle indicated that the results for the moving source increased more than those for the static source as the counting time decreased. The combined standard uncertainty, with the coverage factor of 1, was within 4% at the counting time of 100 ms. This investigation supported the feasibility of the method proposed for estimating the source strength during the implantation procedure, regardless of the source speed. The method proposed is a potential option for reducing the risk of accidental replacements of sources with those of incorrect strengths. Oxford University Press 2014-01 2013-06-30 /pmc/articles/PMC3885120/ /pubmed/23816530 http://dx.doi.org/10.1093/jrr/rrt087 Text en © The Author 2013. Published by Oxford University Press on behalf of The Japan Radiation Research Society and Japanese Society for Therapeutic Radiology and Oncology. http://creativecommons.org/licenses/by-nc/3.0/ This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0/), which permits non-commercial re-use, distribution, and reproduction in any medium, provided the original work is properly cited. For commercial re-use, please contact journals.permissions@oup.com |
spellingShingle | Technology Tanaka, Kenichi Endo, Satoru Tateoka, Kunihiko Asanuma, Osamu Kamo, Ken-ichi Sato, Kaori Takeda, Hiromitsu Takagi, Masaru Hareyama, Masato Takada, Jun Measurement of the strength of iodine-125 seed moving at unknown speed during implantation in brachytherapy |
title | Measurement of the strength of iodine-125 seed moving at unknown speed during implantation in brachytherapy |
title_full | Measurement of the strength of iodine-125 seed moving at unknown speed during implantation in brachytherapy |
title_fullStr | Measurement of the strength of iodine-125 seed moving at unknown speed during implantation in brachytherapy |
title_full_unstemmed | Measurement of the strength of iodine-125 seed moving at unknown speed during implantation in brachytherapy |
title_short | Measurement of the strength of iodine-125 seed moving at unknown speed during implantation in brachytherapy |
title_sort | measurement of the strength of iodine-125 seed moving at unknown speed during implantation in brachytherapy |
topic | Technology |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3885120/ https://www.ncbi.nlm.nih.gov/pubmed/23816530 http://dx.doi.org/10.1093/jrr/rrt087 |
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