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Artificial Intelligence–based CT Assessment of Bronchiectasis: The … – RSNA Publications Online

December 18, 2022 by AVA Leave a Comment

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Among ever-smokers from the COPDGene cohort, an increased percentage of artificial intelligence–based airway-to-artery diameter ratios at chest CT were associated with a higher total number of exacerbations during follow-up.
CT is the standard method used to assess bronchiectasis. A higher airway-to-artery diameter ratio (AAR) is typically used to identify enlarged bronchi and bronchiectasis; however, current imaging methods are limited in assessing the extent of this metric in CT scans.
To determine the extent of AARs using an artificial intelligence–based chest CT and assess the association of AARs with exacerbations over time.
In a secondary analysis of ever-smokers from the prospective, observational, multicenter COPDGene study, AARs were quantified using an artificial intelligence tool. The percentage of airways with AAR greater than 1 (a measure of airway dilatation) in each participant on chest CT scans was determined. Pulmonary exacerbations were prospectively determined through biannual follow-up (from July 2009 to September 2021). Multivariable zero-inflated regression models were used to assess the association between the percentage of airways with AAR greater than 1 and the total number of pulmonary exacerbations over follow-up. Covariates included demographics, lung function, and conventional CT parameters.
Among 4192 participants (median age, 59 years; IQR, 52–67 years; 1878 men [45%]), 1834 had chronic obstructive pulmonary disease (COPD). During a 10-year follow-up and in adjusted models, the percentage of airways with AARs greater than 1 (quartile 4 vs 1) was associated with a higher total number of exacerbations (risk ratio [RR], 1.08; 95% CI: 1.02, 1.15; P = .01). In participants meeting clinical and imaging criteria of bronchiectasis (ie, clinical manifestations with ≥3% of AARs >1) versus those who did not, the RR was 1.37 (95% CI: 1.31, 1.43; P < .001). Among participants with COPD, the corresponding RRs were 1.10 (95% CI: 1.02, 1.18; P = .02) and 1.32 (95% CI: 1.26, 1.39; P < .001), respectively.
In ever-smokers with chronic obstructive pulmonary disease, artificial intelligence-based CT measures of bronchiectasis were associated with more exacerbations over time.
Clinical trial registration no. NCT00608764
© RSNA, 2022
Online supplemental material is available for this article.
See also the editorial by Schiebler and Seo in this issue.

Abbreviations:
AAR

airway-to-artery diameter ratio

AI

artificial intelligence

COPD

chronic obstructive pulmonary disease

FEV1

forced expiratory volume in 1 second

RR

risk ratio

SS

single section

Abbreviations:
AAR

airway-to-artery diameter ratio

AI

artificial intelligence

COPD

chronic obstructive pulmonary disease

FEV1

forced expiratory volume in 1 second

RR

risk ratio

SS

single section

airway-to-artery diameter ratio
artificial intelligence
chronic obstructive pulmonary disease
forced expiratory volume in 1 second
risk ratio
single section

Altmetric Score

source

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