Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: At least moderate enlargement of the cardiac silhouette is compatible with known pericardial effusion . The mediastinal contours are within normal limits . The bilateral hila are unremarkable . The lungs are clear . There is no pulmonary vascular congestion . There is no pneumothorax or pleural effusion .
    OUTPUT:
    
1 . Moderate enlargement of the cardiac silhouette , compatible with known pericardial effusion . 2 . Clear lungs . No focal consolidation .