High-resolution computerized tomography (HRCT) of the same patient. (a) Presence of paraseptal emphysema and subpleural bullae (white arrowheads) and centrilobular emphysema (arrows) in both upper lobes. (b) Reticular interstitial disease with intralobular thickening and images of subpleural honeycombing and traction bronchiectasis (black arrowheads), (c) Reticular interstitial disease in middle and right lower lobes, with interlobular septal thickening, subpleural honeycombing, and traction bronchiectasis. (d) Coronal reconstruction in the posterior regions of both lungs: bilateral paraseptal emphysema (white arrowheads) and reticular interstitial disease and honeycombing in right lower lobe.