Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size is borderline . There is a new moderate interstitial abnormality with perihilar hazy opacification and indistinct pulmonary vessels , most suggestive of interstitial pulmonary edema . This appearance includes a relatively confluent area of right infrahilar opacification . There is no clear evidence for pleural effusion . There is no pneumothorax .
    OUTPUT:
    
Findings consistent with onset of moderate interstitial pulmonary edema . Relatively focal area of new opacification in the right lower lung could be explained by asymmetric edema , but followup radiographs are suggested to exclude an underlying second developing process such as pneumonia or aspiration .