Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Relatively low lung volumes are noted with crowding of the bronchovascular markings . Bibasilar opacities are identified . There is no effusion , pneumothorax , or overt pulmonary edema . Cardiac silhouette is slightly enlarged but likely accentuated due to lower lung volumes . No acute osseous abnormalities identified .
    OUTPUT:
    
Bibasilar opacities may be due to atelectasis although pneumonia would be possible particularly at the right lung base in the proper clinical setting .