Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Aorta is tortuous . The cardiac silhouette is top - normal . There is bibasilar atelectasis . Subtle basilar opacity is seen which could be due to atelectasis although infectious process or aspiration not excluded . No large pleural effusion is seen . There is no pneumothorax . There may be minimal vascular congestion .
    OUTPUT:
    
Subtle basilar opacity is seen which could be due to atelectasis although infection or aspiration not excluded .