Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac silhouette is moderate to markedly enlarged . The mediastinal contours are similar compared to ___ and ___ , probably in part accentuated by low lung volumes . There is mild vascular congestion . No pleural effusion is seen .
    OUTPUT:
    
Mild pulmonary edema . Vascular congestion . Right basilar retrocardiac patchy opacity is seen which , in the appropriate clinical setting , could represent pneumonia or aspiration .