Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest were obtained . The cardiac silhouette is mildly enlarged . There are perihilar opacities which may be due to mild pulmonary edema . Bibasilar opacities may relate to fluid overload ; however , a superimposed infection is not excluded . No large pleural effusion is seen , although a trace right pleural effusion may be present . There is no pneumothorax . Mediastinal contours are stable .
    OUTPUT:
    
Mild enlargement of the cardiac silhouette with mild pulmonary edema , increased since the prior study . Bibasilar opacities may relate to fluid overload , although superimposed infection is not excluded . Possible very trace right pleural effusion .