Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest demonstrate central venous catheter tip projecting over cavoatrial junction . Low lung volumes . Areas of scarring and lucency in the right lung base are noted . Emphysematous changes at the bases are stable . Perihilar vascular congestion is noted . Hilar and mediastinal silhouettes are unremarkable . Heart size is top normal . There is no pneumothorax . Partially imaged upper abdomen is unremarkable . Compression deformities of the thoracic spine are stable . Small bilateral pleural effusions are new . Right lung base confluent opacity has progressed in comparison to prior exams .
    OUTPUT:
    
1 . New small bilateral pleural effusions with perihilar vascular congestion . 2 . Bibasilar emphysematous changes , compatible with patient 's given history of alfa - 1 antitrypsin deficiency . 3 . Right lung base confluent opacity has progressed in comparison to prior exams and may represent atelectasis or infection in the appropriate setting .