Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The right pigtail pleural catheter is in place . Interval improvement of right pleural effusion . Interval improvement of bibasilar atelectasis . Top - normal size of cardiac silhouette . Mediastinal and hilar contours are normal .
    OUTPUT:
    
Interval improvement of right pleural effusion and bibasilar atelectasis . Basilar right pneumothorax is less well demonstrated than on recent radiograph from less than 2 hr earlier , likely due to positional differences .