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Effect of equalization filters on measurements with kerma‐area product meter in a cardiovascular angiography system

PURPOSE: This study aimed to evaluate the effect of equalization filters (EFs) on the kerma‐area product ([Formula: see text]) and incident air‐kerma ([Formula: see text]) using a kerma‐area product (KAP) meter. In addition, potential underestimations of the [Formula: see text] values by EFs were id...

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Autores principales: Ichikawa, Nao, Fukuda, Atsushi, Hayashi, Takuma, Matsubara, Kosuke
Formato: Online Artículo Texto
Lenguaje:English
Publicado: John Wiley and Sons Inc. 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8664145/
https://www.ncbi.nlm.nih.gov/pubmed/34610646
http://dx.doi.org/10.1002/acm2.13444
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author Ichikawa, Nao
Fukuda, Atsushi
Hayashi, Takuma
Matsubara, Kosuke
author_facet Ichikawa, Nao
Fukuda, Atsushi
Hayashi, Takuma
Matsubara, Kosuke
author_sort Ichikawa, Nao
collection PubMed
description PURPOSE: This study aimed to evaluate the effect of equalization filters (EFs) on the kerma‐area product ([Formula: see text]) and incident air‐kerma ([Formula: see text]) using a kerma‐area product (KAP) meter. In addition, potential underestimations of the [Formula: see text] values by EFs were identified. MATERIALS AND METHODS: A portable flat‐panel detector (FPD) was placed to measure the X‐ray beam area (A) and EFs dimension at patient entrance reference point (PERP). Afterward, a 6‐cm(3) external ionization chamber was placed to measure incident air‐kerma ([Formula: see text]) at PERP instead of the portable FPD. KAP reading and [Formula: see text] were simultaneously measured at several X‐ray beam qualities with and without EFs. The X‐ray beam quality correction factor by KAP meter ([Formula: see text]) was calculated by A, [Formula: see text] and KAP reading to acquire the [Formula: see text] and [Formula: see text]. Upon completion of the measurements, [Formula: see text] , [Formula: see text] , and [Formula: see text] were plotted as functions of tube potential, spectral filter, and EFs dimension. Moreover, [Formula: see text] values were calculated to evaluate the [Formula: see text] underestimation. RESULTS: The [Formula: see text] values increased with an increase in the X‐ray tube potential and spectral filter, and the maximum [Formula: see text] was 1.18. [Formula: see text] and [Formula: see text] decreased as functions of EFs dimension, whereas [Formula: see text] was almost constant. [Formula: see text] decreased with an increase in EFs dimension but increased with an increase in tube potential and spectral filter, and the range was 0.55–1.01. CONCLUSIONS: [Formula: see text] value was up to approximately two times lower than the [Formula: see text] values by EFs. When using the [Formula: see text] value, the potential [Formula: see text] underestimation with EFs should be considered.
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spelling pubmed-86641452021-12-21 Effect of equalization filters on measurements with kerma‐area product meter in a cardiovascular angiography system Ichikawa, Nao Fukuda, Atsushi Hayashi, Takuma Matsubara, Kosuke J Appl Clin Med Phys Radiation Measurements PURPOSE: This study aimed to evaluate the effect of equalization filters (EFs) on the kerma‐area product ([Formula: see text]) and incident air‐kerma ([Formula: see text]) using a kerma‐area product (KAP) meter. In addition, potential underestimations of the [Formula: see text] values by EFs were identified. MATERIALS AND METHODS: A portable flat‐panel detector (FPD) was placed to measure the X‐ray beam area (A) and EFs dimension at patient entrance reference point (PERP). Afterward, a 6‐cm(3) external ionization chamber was placed to measure incident air‐kerma ([Formula: see text]) at PERP instead of the portable FPD. KAP reading and [Formula: see text] were simultaneously measured at several X‐ray beam qualities with and without EFs. The X‐ray beam quality correction factor by KAP meter ([Formula: see text]) was calculated by A, [Formula: see text] and KAP reading to acquire the [Formula: see text] and [Formula: see text]. Upon completion of the measurements, [Formula: see text] , [Formula: see text] , and [Formula: see text] were plotted as functions of tube potential, spectral filter, and EFs dimension. Moreover, [Formula: see text] values were calculated to evaluate the [Formula: see text] underestimation. RESULTS: The [Formula: see text] values increased with an increase in the X‐ray tube potential and spectral filter, and the maximum [Formula: see text] was 1.18. [Formula: see text] and [Formula: see text] decreased as functions of EFs dimension, whereas [Formula: see text] was almost constant. [Formula: see text] decreased with an increase in EFs dimension but increased with an increase in tube potential and spectral filter, and the range was 0.55–1.01. CONCLUSIONS: [Formula: see text] value was up to approximately two times lower than the [Formula: see text] values by EFs. When using the [Formula: see text] value, the potential [Formula: see text] underestimation with EFs should be considered. John Wiley and Sons Inc. 2021-10-05 /pmc/articles/PMC8664145/ /pubmed/34610646 http://dx.doi.org/10.1002/acm2.13444 Text en © 2021 The Authors. Journal of Applied Clinical Medical Physics published by Wiley Periodicals, LLC on behalf of The 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 Radiation Measurements
Ichikawa, Nao
Fukuda, Atsushi
Hayashi, Takuma
Matsubara, Kosuke
Effect of equalization filters on measurements with kerma‐area product meter in a cardiovascular angiography system
title Effect of equalization filters on measurements with kerma‐area product meter in a cardiovascular angiography system
title_full Effect of equalization filters on measurements with kerma‐area product meter in a cardiovascular angiography system
title_fullStr Effect of equalization filters on measurements with kerma‐area product meter in a cardiovascular angiography system
title_full_unstemmed Effect of equalization filters on measurements with kerma‐area product meter in a cardiovascular angiography system
title_short Effect of equalization filters on measurements with kerma‐area product meter in a cardiovascular angiography system
title_sort effect of equalization filters on measurements with kerma‐area product meter in a cardiovascular angiography system
topic Radiation Measurements
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8664145/
https://www.ncbi.nlm.nih.gov/pubmed/34610646
http://dx.doi.org/10.1002/acm2.13444
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