Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Coarsened interstitial opacities at the lung bases bilaterally are indicative of interstitial lung disease as seen on prior chest CT . Moderate cardiomegaly is stable . Mediastinal contours are stable , including indentation / rightward shift of the lower trachea by the aortic arch . Increase in density of the right lung base opacity may represent superimposed pneumonia . No large pleural effusion .
    OUTPUT:
    
Increased in density of the right lung base since the prior radiograph concerning for developing pneumonia superimposed on the chronic interstitial changes .