Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Upright PA and lateral radiographs of the chest . The lungs are normally expanded and clear , apart from minimal linear bibasilar opacities which reflect scarring or subsegmental atelectasis . The cardiomediastinal silhouette , hilar contours and pleural surfaces are normal . Pulmonary vascularity is normal and symmetric . There is no pulmonary edema . The aorta is somewhat tortuous . There is no pleural effusion or pneumothorax . On the lateral view , there are degenerative changes of the thoracic spine with anterior and posterior osteophytes .
    OUTPUT:
    
No evidence of acute cardiopulmonary abnormality by radiography .