Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is normal . The aorta is mildly tortuous . Mediastinal and hilar contours are otherwise normal . The lungs are clear . No pleural effusion or pneumothorax is present . No acute osseous abnormality is demonstrated .
    OUTPUT:
    
No acute cardiopulmonary abnormality . No definite displaced fracture identified . Please note that if there is continued concern for sternal fracture , CT is a more sensitive examination .