Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is new developing right middle lobe airspace opacification . There is also subtle retrocardiac opacification . There is mild interstitial pulmonary edema . There is stable enlargement of the cardiomediastinal silhouette . There is no pneumothorax . There are no pleural effusions .
    OUTPUT:
    
1 . New right middle lobe and subtle retrocardiac opacification , concerning for pneumonia or aspiration . 2 . Mild interstitial pulmonary edema .