Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiac , mediastinal and hilar contours are normal , with the heart size within normal limits . The pulmonary vasculature is normal . Lungs are clear without focal consolidation , pleural effusion or pneumothorax . No acute osseous abnormality is identified including no displaced rib fractures . There are mild degenerative changes noted in the thoracic spine .
    OUTPUT:
    
No acute cardiopulmonary abnormality . No acutely displaced rib fractures identified . If there is continued concern for a rib fracture , consider a dedicated rib series .