Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The left pleural effusion has decreased in size after thoracentesis , now small and best appreciated on the lateral view . The right small pleural effusion is unchanged . Bibasilar overlying atelectasis persists . There is no pneumothorax . Heart is mildly enlarged but unchanged . No pulmonary edema . A left subclavian MediPort terminates in the right atrium .
    OUTPUT:
    
Decrease in size of the left pleural effusion after thoracentesis , now small . No pneumothorax .