Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is mildly enlarged . Mediastinal contours are otherwise stable . Diffuse interstitial opacities are new since the prior exam and may represent pulmonary edema with possible superimposed interstitial pneumonia . No substantial pleural effusion . No pneumothorax .
    OUTPUT:
    
Widespread interstitial opacities , consistent with pulmonary edema with possible superimposed infection .