Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Low lung volumes are again noted with secondary crowding of the bronchovascular markings . Bibasilar opacities may be secondary to atelectasis and are grossly unchanged . There is no effusion . Cardiomediastinal silhouette is stable . No acute osseous abnormalities identified .
    OUTPUT:
    
Low lung volumes . Bibasilar opacities , particularly on the lateral view which may be atelectasis noting that infection can not be entirely excluded .