Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiomediastinal and hilar contours are within normal limits . Again seen are multifocal interstitial opacities in both lungs , slightly increased since earlier study of ___ . There is no pleural or pericardial effusion or pneumothorax . No focal consolidation is seen .
    OUTPUT:
    
Interval increase in interstitial opacities since the earlier study of ___ signifies mild degree of pulmonary edema superimposed on chronic interstitial lung disease .