Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lower lung volumes seen on the current exam and there is crowding of the bronchovascular markings . Bibasilar opacities are identified . There is no large effusion . The cardiomediastinal silhouette has not definitely changed . No acute osseous abnormalities identified .
    OUTPUT:
    
Low lung volumes . Bibasilar opacities may be secondary to atelectasis noting that infection is not excluded .