Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Right PICC terminates at the cavoatrial junction . Cardiomediastinal silhouette is stable . Extensive heterogeneous bilateral airspace opacities appear more confluent in the left mid to lower lung . The right lung is also extensive involvement , but unchanged . There is no large pleural effusion or pneumothorax .
    OUTPUT:
    
Extensive heterogeneous bilateral airspace opacities , worse in the left lung , likely represent a combination of acute on chronic infection / inflammation . The acute changes can also be produced by superimposed pulmonary edema .