Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is normal . There is re- demonstration of mild unfolding of the thoracic aorta . Hilar contours are normal . Lungs are clear . Re- demonstration of right - sided breast surgical changes with differential density . Right axillary clips noted . Some old left - sided rib fractures are again noted . Known osseous metastases are better seen on prior exams . Pleural surfaces are clear without effusion or pneumothorax .
    OUTPUT:
    
No acute cardiopulmonary abnormality . Known osseous lesions are better characterized on prior exams .