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The effects of emphysema on airway disease: correlations between multi-detector CT and pulmonary function tests in smokers.

Abstract：

BACKGROUND:Chronic obstructive pulmonary disease (COPD) is characterized by airflow limitation caused by emphysema and small airway narrowing. Quantitative evaluation of airway dimensions by multi-detector computed tomography (MDCT) has revealed a correlation between airway dimension and airflow limitation. However, the effect of emphysema on this correlation is unclear. OBJECTIVE:The goal of this study was to determine whether emphysematous changes alter the relationships between airflow limitation and airway dimensions as measured by inspiratory and expiratory MDCT. METHODS:Ninety-one subjects underwent inspiratory and expiratory MDCT. Images were evaluated for mean airway luminal area (Ai), wall area percentage (WA%) from the third to the fifth generation of three bronchi (B1, B5, B8) in the right lung, and low attenuation volume percent (LAV%). Correlations between each airway index and airflow limitation were determined for each patient and compared between patients with and without evidence of emphysema. RESULTS:In patients without emphysema, Ai and WA% from both the inspiratory and expiratory scans were significantly correlated with FEV1. No correlation was detected in patients with emphysema. In addition, emphysematous COPD patients with GOLD stage 1 or 2 disease had significantly lower changes in B8 Ai than non-emphysematous patients. CONCLUSIONS:A significant correlation exists between airway parameters and FEV1 in patients without emphysema. Emphysema may influence airway dimensions even in patients with mild to moderate COPD.

journal_name

Eur J Radiol

journal_title

European journal of radiology

authors

Yahaba M,Kawata N,Iesato K,Matsuura Y,Sugiura T,Kasai H,Sakurai Y,Terada J,Sakao S,Tada Y,Tanabe N,Tatsumi K

doi

10.1016/j.ejrad.2014.03.003

subject

Has Abstract

pub_date

2014-06-01 00:00:00

pages

1022-1028

issue

6

eissn

0720-048X

issn

1872-7727

pii

S0720-048X(14)00139-9

journal_volume

83

pub_type

杂志文章

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