Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low leading to crowding of the bronchovascular structures . Bibasilar airspace opacities are noted , likely reflecting atelectasis . There is no lobar consolidation , pleural effusion , pneumothorax , or pulmonary edema . Allowing for low lung volumes , the cardiomediastinal silhouette is unchanged .
    OUTPUT:
    
Low lung volumes and bibasilar streaky airspace opacities which likely reflect atelectasis , although superimposed infection is difficult to exclude completely .