Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP upright and lateral views of the chest were obtained . Tracheostomy tube is noted . There has been interval removal of a right subclavian central venous catheter since the prior exam . There is improved aeration of the lungs , most notable in the left lower lobe . There is persistent linear density in the left lower lobe likely representing persistent atelectasis . There is lobar consolidation , effusion , pneumothorax . Mild peribronchial thickening could reflect airways inflammation . Cardiomediastinal silhouette is stable . Bony structures are intact . No free air below the right hemidiaphragm .
    OUTPUT:
    
No lobar consolidation . Bronchial thickening could reflect airways inflammatory process . Improved aeration since prior exam .