Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac silhouette is markedly enlarged , possibly slightly increased as compared to the prior study . No overt pulmonary edema is seen . No pleural effusion or focal consolidation , or evidence of pneumothorax is seen . Mediastinal contours are stable .
    OUTPUT:
    
Marked enlargement of the cardiac silhouette , possibly slightly increased as compared to the prior study given differences in technique .