Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are normally expanded and clear . Heart size is top - normal . The mediastinal silhouette , hilar contours , and pleural surfaces are normal . There is no pleural effusion or pneumothorax . The aorta is mildly unfolded
    OUTPUT:
    
No acute cardiopulmonary abnormality .