Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low with postoperative appearance of the left lung with expected volume loss . There is left greater than right bilateral atelectasis and a small left pleural effusion . A left chest tube is in place without appreciable pneumothorax .
    OUTPUT:
    
No pneumothorax . Low lung volumes with bilateral atelectasis and small left effusion .