Perfusion relative to gravitational height.

<p>Mean normalized perfusion vs. lung height (from the most dorsal point of the lung) in the baseline (grey-open circles), diluent (grey-filled circles) and allergen lobes (black-filled circles) in all subjects (subjects identified by marker in top left of each panel). Each lobe is divided into 8 equal volume regions along the gravitational axis and the mean perfusion and lung height of each region plotted. The allergen lobe can be seen to have lower perfusion across several lung heights (grey highlighted sections), compared to the diluent and allergen. In the remaining 3 subjects the allergen lobe can be seen to deviate to the left of the perfusion height trend for at least one lung height (grey striped highlighted sections). In the most dependent and most non–dependent heights the allergen lobe appears to have no difference in perfusion compared to the baseline and diluent lobes at those equivalent lung heights.