Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are clear . There is no pleural effusion , pneumothorax or focal airspace consolidation . The heart is unchanged in size , mildly enlarged , and the mediastinal and hilar contours are also stable .
    OUTPUT:
    
No acute cardiopulmonary process . Mild enlargement of the cardiac silhouette .