Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral radiographs of the chest demonstrate appropriately positioned right chest tube with small residual right apical pneumothorax , unchanged from the prior radiograph . Otherwise , the lung parenchyma is clear with small bilateral pleural effusions . Increased lung volumes with improvement of bibasilar atelectasis . The cardiac and mediastinal contours are unchanged since the prior radiograph .
    OUTPUT:
    
Stable appearance of right apical pneumothorax with improved lung volumes and improved bibasilar atelectasis .