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Evaluation of the relationship between phantom position and computed tomography dose index in cone beam computed tomography when assuming breast irradiation
This study aims to investigate the influence of the phantom position on weighted computed tomography dose index (CTDI(w)) in cone beam computed tomography (CBCT) when assuming breast irradiation. Computed tomography dose index (CTDI) was measured by the x‐ray volume imaging of CBCT using parameters...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
John Wiley and Sons Inc.
2021
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8200449/ https://www.ncbi.nlm.nih.gov/pubmed/34048143 http://dx.doi.org/10.1002/acm2.13282 |
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author | Ueno, Hiroyuki Matsubara, Kosuke Takemura, Akihiro Hizume, Masato Bou, Sayuri |
author_facet | Ueno, Hiroyuki Matsubara, Kosuke Takemura, Akihiro Hizume, Masato Bou, Sayuri |
author_sort | Ueno, Hiroyuki |
collection | PubMed |
description | This study aims to investigate the influence of the phantom position on weighted computed tomography dose index (CTDI(w)) in cone beam computed tomography (CBCT) when assuming breast irradiation. Computed tomography dose index (CTDI) was measured by the x‐ray volume imaging of CBCT using parameters for image‐guided radiation therapy (IGRT) in right breast irradiation. The measurement points of CTDI ranged from 0 (center) to 16 cm in the right–left (RL) direction, and from 0 (center) to 7.5 cm in the anterior–posterior (AP) direction, which assumed right breast irradiation. A nonuniform change exists in the relative value of CTDI(w) when the phantom deviated from the isocenter of CBCT. The CTDI(w) was ~30% lower compared with the value at the isocenter of CBCT when the phantom deviated 7.5 and 16 cm at the AP and RL directions, respectively. This study confirmed the influence of the phantom position on the CTDI values of CBCT. The CTDI measured at the isocenter of CBCT overestimates that measured at the irradiation center of the breast. |
format | Online Article Text |
id | pubmed-8200449 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | John Wiley and Sons Inc. |
record_format | MEDLINE/PubMed |
spelling | pubmed-82004492021-06-15 Evaluation of the relationship between phantom position and computed tomography dose index in cone beam computed tomography when assuming breast irradiation Ueno, Hiroyuki Matsubara, Kosuke Takemura, Akihiro Hizume, Masato Bou, Sayuri J Appl Clin Med Phys Technical Notes This study aims to investigate the influence of the phantom position on weighted computed tomography dose index (CTDI(w)) in cone beam computed tomography (CBCT) when assuming breast irradiation. Computed tomography dose index (CTDI) was measured by the x‐ray volume imaging of CBCT using parameters for image‐guided radiation therapy (IGRT) in right breast irradiation. The measurement points of CTDI ranged from 0 (center) to 16 cm in the right–left (RL) direction, and from 0 (center) to 7.5 cm in the anterior–posterior (AP) direction, which assumed right breast irradiation. A nonuniform change exists in the relative value of CTDI(w) when the phantom deviated from the isocenter of CBCT. The CTDI(w) was ~30% lower compared with the value at the isocenter of CBCT when the phantom deviated 7.5 and 16 cm at the AP and RL directions, respectively. This study confirmed the influence of the phantom position on the CTDI values of CBCT. The CTDI measured at the isocenter of CBCT overestimates that measured at the irradiation center of the breast. John Wiley and Sons Inc. 2021-05-28 /pmc/articles/PMC8200449/ /pubmed/34048143 http://dx.doi.org/10.1002/acm2.13282 Text en © 2021 The Authors. Journal of Applied Clinical Medical Physics published by Wiley Periodicals, Inc. on behalf of American Association of Physicists in Medicine https://creativecommons.org/licenses/by/4.0/This is an open access article under the terms of the http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. |
spellingShingle | Technical Notes Ueno, Hiroyuki Matsubara, Kosuke Takemura, Akihiro Hizume, Masato Bou, Sayuri Evaluation of the relationship between phantom position and computed tomography dose index in cone beam computed tomography when assuming breast irradiation |
title | Evaluation of the relationship between phantom position and computed tomography dose index in cone beam computed tomography when assuming breast irradiation |
title_full | Evaluation of the relationship between phantom position and computed tomography dose index in cone beam computed tomography when assuming breast irradiation |
title_fullStr | Evaluation of the relationship between phantom position and computed tomography dose index in cone beam computed tomography when assuming breast irradiation |
title_full_unstemmed | Evaluation of the relationship between phantom position and computed tomography dose index in cone beam computed tomography when assuming breast irradiation |
title_short | Evaluation of the relationship between phantom position and computed tomography dose index in cone beam computed tomography when assuming breast irradiation |
title_sort | evaluation of the relationship between phantom position and computed tomography dose index in cone beam computed tomography when assuming breast irradiation |
topic | Technical Notes |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8200449/ https://www.ncbi.nlm.nih.gov/pubmed/34048143 http://dx.doi.org/10.1002/acm2.13282 |
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