Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac , mediastinal and hilar contours are unchanged , with the heart size within normal limits . The aorta remains tortuous . The pulmonary vasculature is normal . Lungs are clear . No pleural effusion or pneumothorax is present . Multiple old right - sided rib fractures are again demonstrated .
    OUTPUT:
    
No acute cardiopulmonary process .