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Operator’s eye lens dose in computed tomography–guided interventions

OBJECTIVES: To survey (1) operator’s eye lens doses in typical computed tomography (CT)-guided interventions, (2) correlation between dose length product (DLP) and the operator’s dose, and (3) different ways for estimating the eye lens dose in clinical settings. METHODS: Doses of 16 radiologists in...

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Autores principales: Kaartinen, Siru, Husso, Minna, Matikka, Hanna
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Springer Berlin Heidelberg 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8128838/
https://www.ncbi.nlm.nih.gov/pubmed/33349894
http://dx.doi.org/10.1007/s00330-020-07576-0
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author Kaartinen, Siru
Husso, Minna
Matikka, Hanna
author_facet Kaartinen, Siru
Husso, Minna
Matikka, Hanna
author_sort Kaartinen, Siru
collection PubMed
description OBJECTIVES: To survey (1) operator’s eye lens doses in typical computed tomography (CT)-guided interventions, (2) correlation between dose length product (DLP) and the operator’s dose, and (3) different ways for estimating the eye lens dose in clinical settings. METHODS: Doses of 16 radiologists in 164 CT-guided interventional procedures were prospectively measured during a 6-month time period upon radioprotective garments and descriptive statistical outcomes were calculated. The correlations between DLP and measured doses were surveyed. RESULTS: On average, the operator’s dose at the eye level (DEL, H(p)(0.07)) was 22 μSv per procedure and the personal equivalent dose H(p)(10) at the collar level was 21 μSv per procedure. The mean DLP of a procedure was 320 mGy cm, where 54% resulted from the fluoroscopy, the mean exposure time being 18 s. Based on the results, the operator’s DEL could be estimated from DLP using the equation DEL (μSv) = 0.10 μSv/mGy cm × patient fluoro DLP (mGycm) (p < 0.001), and the dose at the collar level (DCL) using the equation DCL (μSv) = 0.12 μSv/mGy cm × patient fluoro DLP (mGy cm) (p < 0.001). In addition, DEL (μSv) = 0.7 × DCL (μSv). CONCLUSIONS: The eye lens doses in CT-guided interventions are generally low even without protective equipment, and it is unlikely that the recommended annual equivalent dose limit of 20 mSv for the lens of the eye will be exceeded by conducting CT-guided interventions solely. Eye lens dose can be roughly estimated based on either DLP of the procedure or dose measured at the operator’s collar level. KEY POINTS: • Eye lens doses in CT-guided operations are generally low. • It is unlikely that the ICRP recommendation of the yearly equivalent dose limit of 20 mSv will be exceeded by conducting CT-guided interventions solely. • Magnitude of eye lens dose can be estimated based on either DLP of the procedure or dose measured at the operator’s collar level.
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spelling pubmed-81288382021-05-24 Operator’s eye lens dose in computed tomography–guided interventions Kaartinen, Siru Husso, Minna Matikka, Hanna Eur Radiol Computed Tomography OBJECTIVES: To survey (1) operator’s eye lens doses in typical computed tomography (CT)-guided interventions, (2) correlation between dose length product (DLP) and the operator’s dose, and (3) different ways for estimating the eye lens dose in clinical settings. METHODS: Doses of 16 radiologists in 164 CT-guided interventional procedures were prospectively measured during a 6-month time period upon radioprotective garments and descriptive statistical outcomes were calculated. The correlations between DLP and measured doses were surveyed. RESULTS: On average, the operator’s dose at the eye level (DEL, H(p)(0.07)) was 22 μSv per procedure and the personal equivalent dose H(p)(10) at the collar level was 21 μSv per procedure. The mean DLP of a procedure was 320 mGy cm, where 54% resulted from the fluoroscopy, the mean exposure time being 18 s. Based on the results, the operator’s DEL could be estimated from DLP using the equation DEL (μSv) = 0.10 μSv/mGy cm × patient fluoro DLP (mGycm) (p < 0.001), and the dose at the collar level (DCL) using the equation DCL (μSv) = 0.12 μSv/mGy cm × patient fluoro DLP (mGy cm) (p < 0.001). In addition, DEL (μSv) = 0.7 × DCL (μSv). CONCLUSIONS: The eye lens doses in CT-guided interventions are generally low even without protective equipment, and it is unlikely that the recommended annual equivalent dose limit of 20 mSv for the lens of the eye will be exceeded by conducting CT-guided interventions solely. Eye lens dose can be roughly estimated based on either DLP of the procedure or dose measured at the operator’s collar level. KEY POINTS: • Eye lens doses in CT-guided operations are generally low. • It is unlikely that the ICRP recommendation of the yearly equivalent dose limit of 20 mSv will be exceeded by conducting CT-guided interventions solely. • Magnitude of eye lens dose can be estimated based on either DLP of the procedure or dose measured at the operator’s collar level. Springer Berlin Heidelberg 2020-12-21 2021 /pmc/articles/PMC8128838/ /pubmed/33349894 http://dx.doi.org/10.1007/s00330-020-07576-0 Text en © The Author(s) 2020 https://creativecommons.org/licenses/by/4.0/Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) .
spellingShingle Computed Tomography
Kaartinen, Siru
Husso, Minna
Matikka, Hanna
Operator’s eye lens dose in computed tomography–guided interventions
title Operator’s eye lens dose in computed tomography–guided interventions
title_full Operator’s eye lens dose in computed tomography–guided interventions
title_fullStr Operator’s eye lens dose in computed tomography–guided interventions
title_full_unstemmed Operator’s eye lens dose in computed tomography–guided interventions
title_short Operator’s eye lens dose in computed tomography–guided interventions
title_sort operator’s eye lens dose in computed tomography–guided interventions
topic Computed Tomography
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8128838/
https://www.ncbi.nlm.nih.gov/pubmed/33349894
http://dx.doi.org/10.1007/s00330-020-07576-0
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