Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiac silhouette is upper limits of normal in size . Mediastinal and hilar contours are normal . Previously present bibasilar lung opacities have nearly resolved with residual predominantly linear opacities remaining . Upper lobe predominant emphysema is present , most severe in the left upper lobe , as well as small branching opacities in the periphery of the upper lobes , which appear to correspond to regions of chronic small airways disease on prior ___ chest CT . The latter are nonspecific but could reflect chronic aspiration or atypical mycobacterial infection . Bones are diffusely demineralized , in keeping with the patient 's advanced age .
    OUTPUT:
    
Bibasilar consolidation has essentially resolved with residual linear areas of atelectasis . Severe upper lobe emphysema and peripheral small airways disease as described .