Parametric maps of Barrier:Gas (binned according to a reference
distribution mean and standard deviation) in coronal slices from 3 different
subjects at both visits. Lung volumes were approximately +14%, +4% and
−18% different at visit 2 for subjects 01, 02 and 06, respectively.
Smaller visit 2 lung volumes (e.g. Subject 06) were associated with higher visit
2 Barrier:Gas, and vice versa (e.g. Subject 01). Spatial distributions of
regions of relatively high and low Barrier:Gas appear relatively well matched
between visits. Subject numbers correspond to those in Table 1. Numerical cutoff values between Barrier:Gas
bins (from smallest to largest) were [0.26, 0.64, 1.03, 1.42, 1.81, 2.20,
2.58].