Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is increased opacity in the right middle lobe partially silhouetting the right hemidiaphragm . Elsewhere , the lungs are clear . The cardiomediastinal silhouette is otherwise unremarkable . No acute osseous abnormalities .
    OUTPUT:
    
Right middle lobe atelectasis versus infection , to be correlated clinically .