Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable upright view of the chest demonstrates increased lung volumes and flattening of the hemidiaphragms , as well as attenuation of the pulmonary vascular markings , compatible with severe emphysema . Right lateral lung base opacities are longstanding and likely reflect scarring . Bibasilar streaky opacities could reflect atelectasis or infection . No pleural effusion or pneumothorax is seen . There is mild perihilar vascular congestion . Aortic arch calcifications are again noted . Hilar and mediastinal silhouettes are unchanged . Heart size is top normal . Partially imaged upper abdomen is unremarkable .
    OUTPUT:
    
Bibasilar opacities may represent atelectasis or infection in the appropriate clinical setting . Emphysema .