Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is subtle right basilar opacity and lack of visualization of the right heart border . There is minimal increased density projecting over the cardiac sillouette on the lateral view . Elsewhere , the lungs are clear . The cardiomediastinal silhouette is normal . No acute osseous abnormality is identified .
    OUTPUT:
    
Loss of the right heart border with subtle increased right lower lung opacity which could represent right middle lobe pneumonia .