Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is subtle focal consolidation identified at the right lung base medially also seen overlying the heart posteriorly on the lateral view . This is new since most recent prior but is similar to opacity seen on prior exam dated ___ . Elsewhere , lungs are clear . The cardiomediastinal silhouette is within normal limits . No acute osseous abnormalities .
    OUTPUT:
    
Subtle opacity at the right lung base medially which could represent atelectasis although pneumonia would be possible in the proper clinical setting .