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Correlation of positron emission tomography ventilation-perfusion matching with CT densitometry in severe emphysema

BACKGROUND: Emphysema severity is frequently measured on CT via densitometry. Correlation with scintigraphic and spirometric functional measures of ventilation or perfusion varies widely, and no prior study has evaluated correlation between densitometry and lobar ventilation/perfusion in patients wi...

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Autores principales: Bonney, Asha, Wagner, Carrie-Anne, Siva, Shankar, Callahan, Jason, Le Roux, Pierre-Yves, Pascoe, Diane M., Irving, Louis, Hofman, Michael S., Steinfort, Daniel P.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Springer Berlin Heidelberg 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7387398/
https://www.ncbi.nlm.nih.gov/pubmed/32725552
http://dx.doi.org/10.1186/s13550-020-00672-8
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author Bonney, Asha
Wagner, Carrie-Anne
Siva, Shankar
Callahan, Jason
Le Roux, Pierre-Yves
Pascoe, Diane M.
Irving, Louis
Hofman, Michael S.
Steinfort, Daniel P.
author_facet Bonney, Asha
Wagner, Carrie-Anne
Siva, Shankar
Callahan, Jason
Le Roux, Pierre-Yves
Pascoe, Diane M.
Irving, Louis
Hofman, Michael S.
Steinfort, Daniel P.
author_sort Bonney, Asha
collection PubMed
description BACKGROUND: Emphysema severity is frequently measured on CT via densitometry. Correlation with scintigraphic and spirometric functional measures of ventilation or perfusion varies widely, and no prior study has evaluated correlation between densitometry and lobar ventilation/perfusion in patients with severe emphysema. The aim of this study was to evaluate the utility and findings of gallium-68 ((68)Ga) ventilation/perfusion positron emission tomography-CT ((68)Ga-VQ/PET-CT) in severe emphysema assessment. METHODS: Fourteen consecutive patients undergoing evaluation for bronchoscopic lung volume reduction between March 2015 and March 2018 underwent (68)Ga-VQ/PET-CT assessment for lobar functional lung mapping, in addition to CT densitometry. Correlations between CT densitometry and (68)Ga-VQ/PET-CT parameters for individual lobar lung function were sought. RESULTS: CT densitometry assessment of emphysema correlated only weakly (R(2) = 0.13) with lobar perfusion and was not correlated with ventilation (R(2) = 0.04). Densitometry was moderately (R(2) = 0.67) correlated with V/Q units in upper lobes, though poorly reflected physiological function in lower lobes (R(2) = 0.19). Emphysema severity, as measured by CT densitometry, was moderately correlated with proportion of normal V/Q units and matched V/Q defects in individual lobes. CONCLUSIONS: Assessment of lobar pulmonary function by (68)Ga-VQ/PET-CT provides physiologic information not evident on CT densitometry such as ventilation and perfusion specifics and matched defects. Further research is needed to see if the discordant findings on (68)Ga-VQ/PET-CT provide prognostic information or can be used to modify patient management and improve outcomes.
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spelling pubmed-73873982020-08-12 Correlation of positron emission tomography ventilation-perfusion matching with CT densitometry in severe emphysema Bonney, Asha Wagner, Carrie-Anne Siva, Shankar Callahan, Jason Le Roux, Pierre-Yves Pascoe, Diane M. Irving, Louis Hofman, Michael S. Steinfort, Daniel P. EJNMMI Res Original Research BACKGROUND: Emphysema severity is frequently measured on CT via densitometry. Correlation with scintigraphic and spirometric functional measures of ventilation or perfusion varies widely, and no prior study has evaluated correlation between densitometry and lobar ventilation/perfusion in patients with severe emphysema. The aim of this study was to evaluate the utility and findings of gallium-68 ((68)Ga) ventilation/perfusion positron emission tomography-CT ((68)Ga-VQ/PET-CT) in severe emphysema assessment. METHODS: Fourteen consecutive patients undergoing evaluation for bronchoscopic lung volume reduction between March 2015 and March 2018 underwent (68)Ga-VQ/PET-CT assessment for lobar functional lung mapping, in addition to CT densitometry. Correlations between CT densitometry and (68)Ga-VQ/PET-CT parameters for individual lobar lung function were sought. RESULTS: CT densitometry assessment of emphysema correlated only weakly (R(2) = 0.13) with lobar perfusion and was not correlated with ventilation (R(2) = 0.04). Densitometry was moderately (R(2) = 0.67) correlated with V/Q units in upper lobes, though poorly reflected physiological function in lower lobes (R(2) = 0.19). Emphysema severity, as measured by CT densitometry, was moderately correlated with proportion of normal V/Q units and matched V/Q defects in individual lobes. CONCLUSIONS: Assessment of lobar pulmonary function by (68)Ga-VQ/PET-CT provides physiologic information not evident on CT densitometry such as ventilation and perfusion specifics and matched defects. Further research is needed to see if the discordant findings on (68)Ga-VQ/PET-CT provide prognostic information or can be used to modify patient management and improve outcomes. Springer Berlin Heidelberg 2020-07-28 /pmc/articles/PMC7387398/ /pubmed/32725552 http://dx.doi.org/10.1186/s13550-020-00672-8 Text en © The Author(s) 2020 Open AccessThis 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/.
spellingShingle Original Research
Bonney, Asha
Wagner, Carrie-Anne
Siva, Shankar
Callahan, Jason
Le Roux, Pierre-Yves
Pascoe, Diane M.
Irving, Louis
Hofman, Michael S.
Steinfort, Daniel P.
Correlation of positron emission tomography ventilation-perfusion matching with CT densitometry in severe emphysema
title Correlation of positron emission tomography ventilation-perfusion matching with CT densitometry in severe emphysema
title_full Correlation of positron emission tomography ventilation-perfusion matching with CT densitometry in severe emphysema
title_fullStr Correlation of positron emission tomography ventilation-perfusion matching with CT densitometry in severe emphysema
title_full_unstemmed Correlation of positron emission tomography ventilation-perfusion matching with CT densitometry in severe emphysema
title_short Correlation of positron emission tomography ventilation-perfusion matching with CT densitometry in severe emphysema
title_sort correlation of positron emission tomography ventilation-perfusion matching with ct densitometry in severe emphysema
topic Original Research
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7387398/
https://www.ncbi.nlm.nih.gov/pubmed/32725552
http://dx.doi.org/10.1186/s13550-020-00672-8
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