Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is at least moderate enlargement of the cardiac silhouette . The mediastinal contours are within normal limits . The hila are unremarkable . Bilateral airspace opacities with a central predominance likely reflects pulmonary vascular congestion and mild pulmonary edema , although superimposed infection is difficult to exclude in the appropriate clinical setting . There is no pneumothorax or pleural effusion .
    OUTPUT:
    
Bilateral airspace opacities with a central predominance likely reflect pulmonary vascular congestion and mild pulmonary edema . Difficult to exclude superimposed infection in the appropriate clinical setting .