Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A left chest tube is present with the tip towards the apex . There has been marked resolution of the left pleural effusion . No pneumothorax is present . Atelectasis at the left base is seen , consistent with prior fusion . No evidence of pneumonia is seen . The right lung remains clear .
    OUTPUT:
    
Clearing of left effusion . No pneumothorax .