Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are well expanded and show mild interstitial opacities along with more confluent opacities in both lower lobes , which are essentially unchanged compared to the previous examination . The cardiac silhouette is top normal . The mediastinal silhouette and hilar contours are normal . No pleural effusion or pneumothorax is present . Sternal wires are intact .
    OUTPUT:
    
1 . Mild interstitial edema with bibasilar opacities that could represent atelectasis .