Figure 4. (A, B) Mild residual lesion. Chest radiograph and CT scan of the same patient showing parenchymal band associated with traction bronchiectasis on CT (arrows). Moderate residual lesion: (C) chest radiograph showing intersticial lesions in subhilar regions (arrow) and (D) CT scan showing focal paracicatricial emphysema adjacent to irregular septal thickening (arrowhead). Severe residual lesion: (E) chest radiograph showing interstitial fibrotic lesions and signs of pulmonary hyperinflation, such as low set and flattened diaphragm (arrow). (F) These emphysema signs are better characterized by CT scan (arrowheads).