Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size is borderline enlarged . The aorta is mildly unfolded . Pulmonary vascularity is normal . Mediastinal and hilar contours are within normal limits . Lungs are clear . No pleural effusion or pneumothorax is present . No acute osseous abnormalities are detected . A staple is seen projecting over the right axillary region , which is likely external to the patient .
    OUTPUT:
    
No acute cardiopulmonary abnormality .