Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single AP portable view of the chest was obtained . The cardiac silhouette is enlarged and globular in appearance , raising concern for pericardial effusion . There is a small left pleural effusion . A trace right pleural effusion is difficult to exclude . There is no overt pulmonary edema . Aortic knob calcification is seen .
    OUTPUT:
    
Severe enlargement of the cardiac silhouette , raising concern for underlying pericardial effusion . Small left pleural effusion with possible trace right pleural effusion . No overt pulmonary edema .