Fig 5. The ratio of mucus-occluded bronchial compartments in 13 subjects during asthma exacerbation and the stable phase observed in the upper, middle/lingula, and lower lobes.

Mucus occlusion (mucus plug) was measured by HRCT using curved MPR software. Mucus occlusions were counted per airway generation in all segments of the lung for each subject. Airway segment data were then grouped by lobes for analysis. Each point represents the ratio of mucus-occluded bronchial compartments in 13 patients for each bronchial generation/segment.