Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: On review of single AP view , there has not been much change in the lungs over last eight to nine hours . Previously described bibasilar opacities are unchanged . No new lung opacities . Heart size , mediastinal and hilar contours are normal . There is no pleural abnormality .
    OUTPUT:
    
Since last eight to nine hours previously described bibasilar opacities concerning for infection / aspiration are unchanged . No new opacities .