Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is enlarged but stable from the prior study . Again , there is a normal postoperative appearance of the cardiac silhouette . Minimal bibasilar atelectasis is not significantly changed . The lung volumes are low . There is no evidence of the pulmonary edema or pneumothorax . There are small bilateral pleural effusions .
    OUTPUT:
    
1 . Small bilateral pleural effusions . 2 . Bibasilar atelectasis , unchanged .