Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest were reviewed . Small - to - moderate bibasilar atelectasis and a small left pleural effusion are unchanged since ___ . Otherwise , the lungs are clear without evidence of vascular congestion or pneumothorax . Heart size is top normal and unchanged . Normal post-operative hila .
    OUTPUT:
    
Small - to - moderate bibasilar atelectasis and a small left pleural effusion are unchanged since ___ . No pneumothorax .