Figure 3
From: Tracking X-ray microscopy for alveolar dynamics in live intact mice
Quantitative analysis of sac and duct alveoli in 3-D geometry.
(a) Segmented 3D images of alveoli in ducts and sacs in inspiration (left) and in expiration (right). Scale bar, 50 μm. (b) The ratio of the alveolar depth (D) and the mouth diameter (MD), D/MD, as a function of alveolar angle, for ~80 alveoli over 18 ducts with sacs in a live intact mouse. See an alveolus scheme (right). Green line: D/MD as a function of alveolar angle assuming spherical cap. D/MD in SA and DA in expiration: 0.87 ± 0.03 and 0.59 ± 0.03 (mean ± s.e.m., P = 1.1 × 10−7); D/MD in SA and DA in inspiration: 0.86 ± 0.03 and 0.59 ± 0.03 (mean ± s.e.m., P = 1.3 × 10−7).
