Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: This study was interpreted in conjunction with the CT of ___ . There is moderate enlargement of the cardiac silhouette , which is due to the known pericardial effusion , with likely early tamponade ( relative narrowing of the SVC caliber , without right atrial collapse ) . The lungs are well expanded and clear , without evidence of pulmonary edema or consolidation . No pleural effusion or pneumothorax is seen .
    OUTPUT:
    
Moderate enlargement of the cardiac silhouette , due to known pericardial effusion , with radiologic signs of tamponade . No evidence of pulmonary edema . The above findings were discussed with Dr . ___ ___ telephone at 10 :50 A . M on ___ .