Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is mildly enlarged . The hilar and mediastinal contours are within normal limits . There is no pneumothorax or pleural effusion . Coarse biapical opacities are increased since the ___ examination but similar to the ___ examination , likely reflecting a chronic interstitial process such as bronchiolitis with superimposed congestion .
    OUTPUT:
    
Persistent biapical interstitial opacities , more dense since ___ , possibly reflecting congestion superimposed on chronic bronchiolitis .