Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are well expanded and show bilateral interstitial and focal airspace opacities . The cardiac silhouette is enlarged . The mediastinal silhouette and hilar contours are normal . No pleural effusion or pneumothorax is present . Note is made of an enlarged azygous vein .
    OUTPUT:
    
Mild interstitial and pulmonary edema . No pneumonia .