Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is relative increased opacity projecting over the right lung base which correlates with subtle opacity over the heart on the lateral view . The lungs are otherwise clear . The cardiomediastinal silhouette is within normal limits . No displaced fractures .
    OUTPUT:
    
Subtle right middle lobe opacity , to be correlated clinically regarding the possibility of infection versus atelectasis .