Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There are subtle nodular opacities at the lung bases bilaterally , which may represent nipple shadows . In addition , there is an opacity overlying the right anterior seventh rib , which may represent a chronic rib fracture . Otherwise , the lungs are clear . Hyper expansion of the lungs and hyperlucency are most consistent with emphysema . Heart size is normal . The mediastinal and hilar contours are normal . The pulmonary vasculature is normal . No pleural effusion or pneumothorax is seen . Multiple compression deformities are seen within the thoracic spine , which are similar in appearance compared to ___ .
    OUTPUT:
    
1 . Nodular opacities at the lung bases bilaterally , which likely represent nipple shadows . In addition , there is an opacity overlying the right anterior seventh rib , which may represent callus at a rib fracture . However , 1 are more pulmonary nodules can not be excluded in this patient with emphysema . 2 . Multiple stable compression deformities within the thoracic spine .