Fig 3. The ratios of Din during asthma exacerbation and in the stable phase observed from the second- (segmental) to sixth-generation bronchi.

Din was measured per airway generation in all segments of the lung by HRCT for each subject at suspended end-inspiratory volume using curved MPR software. Each point represents the mean Din ratio of 13 subjects for each segment. * denotes P < 0.05 and ** denotes P < 0.01.