Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiac silhouette size remains mild to moderately enlarged . The mediastinal and hilar contours are similar . Lungs are hyperinflated with attenuation of pulmonary vascular markings towards the apices compatible with upper lobe predominant mild to moderate emphysema . There is no pulmonary edema . Linear and patchy bibasilar airspace opacities likely reflect a combination of scarring and atelectasis . Blunting of the right costophrenic angle is chronic , likely reflective of pleural thickening . No pleural effusion or pneumothorax is otherwise demonstrated . There is no focal consolidation . Moderate multilevel degenerative changes are seen in the thoracic spine .
    OUTPUT:
    
Emphysema . Scarring and / or atelectasis in the lung bases . No new focal consolidation .