Fig. 3From: Patterns of brain structural alteration in COPD with different levels of pulmonary function impairment and its association with cognitive deficitsTBSS results of the differences in diffusion indices between severe COPD patients and the comparison group Note: Green represents the mean WM skeleton of all subjects; yellow, red and blue represent regions with increased MD, increased AD, and increased RD, respectively, in severe COPD patients (P < 0.05, FWE corrected). Abbreviations: TBSS, tract-based spatial statistics; COPD, chronic obstructive pulmonary disease; NCs, normal controls; WM, white matter; MD, mean diffusivity; AD, axial diffusivity; and RD, radial diffusivityBack to article page