Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiomediastinal and hilar contours are stable . The bibasilar atelectasis is improving as well as small pleural effusion . There is no pneumothorax . The lungs are otherwise clear .
    OUTPUT:
    
Improvement of bibasilar atelectasis and small pleural effusions . No pneumothorax .