Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are well - expanded and clear . No focal consolidation , edema , effusion , or pneumothorax . Median sternotomy wires appear intact . The descending thoracic aorta is tortuous with moderate atherosclerotic calcifications at the arch . The heart is not enlarged . The mediastinum is not widened . Multilevel degenerative changes of the thoracic spine are moderate with diffuse idiopathic skeletal hyperostosis .
    OUTPUT:
    
No focal pneumonia .