Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is mild interstitial pulmonary edema . A right lower lobe opacity may represent pulmonary edema or infection . No pleural effusion or pneumothorax . Moderate to severe cardiomegaly has progressed since ___ . The aorta is unfolded .
    OUTPUT:
    
1 . Mild interstitial pulmonary edema . 2 . A right lower lobe opacity may represent atelectasis . 3 . Moderate to severe cardiomegaly has progressed since ___ .