Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is upper limits of normal . The patient is status post previous median sternotomy and coronary bypass surgery . The mediastinal and hilar contours are remarkable for a tortuous and calcified thoracic aorta . The pulmonary vasculature is normal . Lungs are clear . No pleural effusion or pneumothorax is seen . There are no acute osseous abnormalities . Oval shaped calcification in the right breast anteriorly is unchanged .
    OUTPUT:
    
No acute cardiopulmonary abnormality . Please see separately dictated right rib series for assessment of the ribs .