Heterogeneity in pulmonary emphysema: Analysis of CT attenuation using Gaussian mixture model
Fig 2
Scatter plots of FEV1/FVC against COPD quantification.
A)–D) show the plots for LAV, CSA, WA, and HC, respectively. Abbreviations: FEV1/FVC, ratio of forced expiratory volume in one second to forced vital capacity; LAV, percentage of low-attenuation volume in the lungs; HC, heterogeneity of CT attenuation in emphysema; CSA, percentage of cross-sectional area for small pulmonary vessels; WA, percentage of wall area.