Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The right - sided chest drain has been removed . No right - sided pneumothorax . The airspace opacification in the inferior aspect of the right upper lobe appears slightly decreased . The heart size is normal . Unfolding of the thoracic aorta . The left lung is clear .
    OUTPUT:
    
No right - sided pneumothorax .