Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low . There are bibasilar opacities which are non-specific , but compatible with atelectasis . Allowing for this , no focal consolidation , pleural effusion or pneumothorax detected . Cardiomediastinal silhouette is within normal limits . No acute osseous abnormalities identified .
    OUTPUT:
    
Low lung volumes . Probable bibasilar atelectasis . No CHF , effusion , or frank consolidation detected .