<p>Influence of Emphysema and Air Trapping Heterogeneity on Pulmonary Function in Patients with COPD</p>

Abstract

Subjects with more heterogeneous distribution and/or upper-zone predominant and/or right-lung predominant patterns on full-expiration tend to have better pulmonary function. Thus, in comparison with emphysema heterogeneity, AT heterogeneity better reflects the pulmonary function changes in COPD patients.