Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared with the prior study , new bilateral interstitial opacities and indistinct interstitial pulmonary markings is compatible with pulmonary edema . The heart is mildly enlarged . No focal consolidation , pleural effusions , or pneumothorax detected . Median sternotomy wires are intact . Small surgical clip overlying the upper trachea is also unchanged .
    OUTPUT:
    
Interval development of mild - to - moderate interstitial pulmonary edema .