Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lung volumes are low . The cardiac , mediastinal and hilar contours appear unchanged aside from new perihilar congestion bilaterally . There is also a new indistinct interstitial abnormality affecting each lung , most suggestive of pulmonary edema . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
Findings suggest mild pulmonary edema .