Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is normal . The aorta is diffusely calcified . The mediastinal and hilar contours are unchanged with mild unfolding of the thoracic aorta . Pulmonary vascularity is normal . The lungs are clear . There is no pleural effusion or pneumothorax . Multilevel degenerative changes are seen in the thoracic spine . Mild contour irregularity of the right ___ posterior rib could reflect a nondisplaced fracture .
    OUTPUT:
    
No acute cardiopulmonary abnormality . Mild irregularity of the contour of the right ___ and ___ posterior ribs . Clinical correlation for tenderness in this region is recommended to exclude a nondisplaced fracture .