Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Redemonstrated are subtle bibasilar airspace opacities , essentially unchanged as compared to the prior examination . There is no pleural effusion , pneumothorax , or frank pulmonary edema identified . The heart size is normal . Mediastinal contours are normal . Surgical clips are seen within the right upper quadrant .
    OUTPUT:
    
Stable bibasilar airspace opacities .