Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Since prior exam , there are new interstitial opacities and vascular congestion , most consistent with moderate pulmonary edema . There is no focal airspace opacity , pleural effusion , or pneumothorax . The mediastinal contours are normal . The heart size is mildly enlarged .
    OUTPUT:
    
New moderate pulmonary edema .