Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Relative elevation of left hemidiaphragm is again none . Left basilar opacity may be secondary to atelectasis . Elsewhere the lungs are grossly clear . The cardiac silhouette is stable in configuration . There is no large effusion . No acute osseous abnormalities identified .
    OUTPUT:
    
Persistent elevation of left hemidiaphragm with left basilar opacity likely atelectasis although infection is not entirely excluded .