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Figure 1: HRCT features in COPD: (A) Vascular attenuation, (B) vascular distortion and increased branching angle, (C) directly visible small airways as ring shadows (white arrowheads), and (D) mosaic attenuation pattern

Figure 1: HRCT features in COPD: (A) Vascular attenuation, (B) vascular distortion and increased branching angle, (C) directly visible small airways as ring shadows (white arrowheads), and (D) mosaic attenuation pattern