Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The tip of an endotracheal tube is 4 .7 cm from the carina . There is stable moderate enlargement of the cardiac silhouette . The mediastinum is normal . A small left pleural effusion is unchanged . An adjacent persistent hazy opacification at the left base likely represents atelectasis . The right lung is clear . There is no pneumothorax .
    OUTPUT:
    
Persistent left basilar atelectasis and small left pleural effusion .