Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is a right infrahilar opacity , new since ___ . There is unchanged mild pulmonary edema . The cardiac silhouette is slightly widened , likely due to left atrial enlargement . The mediastinum is normal and there is no pneumothorax . No large pleural effusions are identified .
    OUTPUT:
    
Right infrahilar opacity might represent early pneumonia . Mild interstitial pulmonary edema .