Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac silhouette size is borderline enlarged . Mediastinal and hilar contours are unchanged . The lungs are clear . Pulmonary vasculature is normal . No pleural effusion or pneumothorax is demonstrated . No acute osseous abnormalities detected .
    OUTPUT:
    
No acute cardiopulmonary abnormality .