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The reliability of radiation dose display of a computed tomography scanner
BACKGROUND: Internationally, the typical allowed difference between the measured radiation dose and dose reported by a computed tomography (CT) scanner is ±20 %. The objective is to describe a method in order to analyse this difference in a CT scanner in the Emergency Department of Kanta-Häme Centra...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Elsevier
2021
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8056233/ https://www.ncbi.nlm.nih.gov/pubmed/33898654 http://dx.doi.org/10.1016/j.ejro.2021.100345 |
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author | Forss, V. Yli-Ollila, H. Vatanen, J. Kölhi, P. Poutanen, V.-P. Palomäki, A. |
author_facet | Forss, V. Yli-Ollila, H. Vatanen, J. Kölhi, P. Poutanen, V.-P. Palomäki, A. |
author_sort | Forss, V. |
collection | PubMed |
description | BACKGROUND: Internationally, the typical allowed difference between the measured radiation dose and dose reported by a computed tomography (CT) scanner is ±20 %. The objective is to describe a method in order to analyse this difference in a CT scanner in the Emergency Department of Kanta-Häme Central Hospital, and to calculate a correction factor for more comparable radiation dose values in further studies. METHODS: Ten intra-day radiation dose measurements were performed with undisturbed setting. Measurement reports on differences between measured and displayed dose were gathered from the vendor maintenance and supervising authority over a 12-year period. Additionally, two in-house measurements were made. A total of 18 datapoints were collected, with some differences in measurement settings. Data were also analysed against imaging parameters, ambient air pressure and time to identify trends or associations in the variation of the discrepancy. RESULTS: Measured doses were generally lower than displayed doses. Differences between displayed and measured doses varied between −3.46 and −0.10 %, with a mean of −1.26 % in the intra-day measurements, and between +4.65 and −17.3 %, with a mean of −7.53 % in the long-term data. There were no trends nor connections in the variations. CONCLUSION: Since the acceptable difference between the radiation dose display and the measured dose is relevant, the average difference for every CT scanner should be determined before radiation dose studies, especially when comparing multiple scanners. |
format | Online Article Text |
id | pubmed-8056233 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | Elsevier |
record_format | MEDLINE/PubMed |
spelling | pubmed-80562332021-04-23 The reliability of radiation dose display of a computed tomography scanner Forss, V. Yli-Ollila, H. Vatanen, J. Kölhi, P. Poutanen, V.-P. Palomäki, A. Eur J Radiol Open Article BACKGROUND: Internationally, the typical allowed difference between the measured radiation dose and dose reported by a computed tomography (CT) scanner is ±20 %. The objective is to describe a method in order to analyse this difference in a CT scanner in the Emergency Department of Kanta-Häme Central Hospital, and to calculate a correction factor for more comparable radiation dose values in further studies. METHODS: Ten intra-day radiation dose measurements were performed with undisturbed setting. Measurement reports on differences between measured and displayed dose were gathered from the vendor maintenance and supervising authority over a 12-year period. Additionally, two in-house measurements were made. A total of 18 datapoints were collected, with some differences in measurement settings. Data were also analysed against imaging parameters, ambient air pressure and time to identify trends or associations in the variation of the discrepancy. RESULTS: Measured doses were generally lower than displayed doses. Differences between displayed and measured doses varied between −3.46 and −0.10 %, with a mean of −1.26 % in the intra-day measurements, and between +4.65 and −17.3 %, with a mean of −7.53 % in the long-term data. There were no trends nor connections in the variations. CONCLUSION: Since the acceptable difference between the radiation dose display and the measured dose is relevant, the average difference for every CT scanner should be determined before radiation dose studies, especially when comparing multiple scanners. Elsevier 2021-04-05 /pmc/articles/PMC8056233/ /pubmed/33898654 http://dx.doi.org/10.1016/j.ejro.2021.100345 Text en © 2021 The Authors https://creativecommons.org/licenses/by-nc-nd/4.0/This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/). |
spellingShingle | Article Forss, V. Yli-Ollila, H. Vatanen, J. Kölhi, P. Poutanen, V.-P. Palomäki, A. The reliability of radiation dose display of a computed tomography scanner |
title | The reliability of radiation dose display of a computed tomography scanner |
title_full | The reliability of radiation dose display of a computed tomography scanner |
title_fullStr | The reliability of radiation dose display of a computed tomography scanner |
title_full_unstemmed | The reliability of radiation dose display of a computed tomography scanner |
title_short | The reliability of radiation dose display of a computed tomography scanner |
title_sort | reliability of radiation dose display of a computed tomography scanner |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8056233/ https://www.ncbi.nlm.nih.gov/pubmed/33898654 http://dx.doi.org/10.1016/j.ejro.2021.100345 |
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