Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There are low lung volumes . Significant bibasilar opacities are seen , likely reflecting atelectasis but can not exclude pneumonia in the right clinical setting . Small bilateral pleural effusions may be present . No pneumothorax is seen . The cardiomediastinal silhouette is unremarkable .
    OUTPUT:
    
Significant bibasilar opacities , likely reflecting atelectasis but can not exclude pneumonia in the right clinical setting .