Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lung volumes are low . There is mild enlargment of the cardiac silhouette . Mild widening of the mediastinal contour is likely due to low lung volumes . Mild patchy opacities likely represent atelectasis . There is no evidence of pneumothorax , large pleural effusions or pulmonary edema .
    OUTPUT:
    
Mild bibasilar atelectasis . No pneumonia or pneumothorax seen .