Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs remain hyperinflated . There is interval improved aeration of both lungs with persistent opacification of the right upper lung zone and bilateral hilar prominence . Extensive abnormal background interstitial lung markings are stable over multiple prior studies . There is no pleural effusion or pneumothorax . A right central venous catheter projects over the cavoatrial junction , unchanged . The cardiomediastinal silhouette is stable . There is exaggerated thoracic kyphosis . A tapered appearance of the left distal clavicle is redemonstrated . Healed right posterior rib fractures are again seen , likely sequela of prior trauma .
    OUTPUT:
    
Improved ventilation with persistent right upper lobe opacification and chronic interstitial changes .