Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is at the upper limits of normal size . The lung volumes are low . There is no pleural effusion or pneumothorax . However , a moderate interstitial abnormality is most suggestive of pulmonary edema . This appearance is new since the prior study . Bony structures are unremarkable .
    OUTPUT:
    
Moderate interstitial abnormality suggesting pulmonary edema .