Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are relatively low . There bibasilar opacities . There is no pneumothorax or effusion . Cardiomediastinal silhouette is within normal limits . No displaced fractures . Surgical clip projects over left upper quadrant .
    OUTPUT:
    
No pneumothorax . Bibasilar opacities potentially atelectasis in the setting of low lung volumes . Infection can not be excluded .