Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The right pleural effusion , now small , and basilar atelectasis have improved over the last week . A larger left pleural effusion remains unchanged . No pneumothorax . The large postoperative cardiac silhouette and mediastinum are stable . The distal tip of a left dual - lumen catheter terminates in the mid SVC , unchanged .
    OUTPUT:
    
1 . Unchanged large left pleural effusion . 2 . Small improving right pleural effusion .