Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is normal . Again seen is bilateral perihilar and paramediastinal opacity , possibly subtly increased since the most recent prior study , which may reflect superinfection at the site of known bronchiectasis as characterized on the prior chest CT . Additionally , a new right lower lung opacity is also present . Left apical capping is again seen . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
Subtle interval increase in opacity at sites of known bronchiectasis may indicate superinfection .