Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are well - expanded and clear . No focal consolidation , effusion , edema , or pneumothorax . The heart is top - normal in size , unchanged . Mediastinal contours are unchanged without mediastinal widening . Multilevel degenerative changes of the thoracic spine are mild .
    OUTPUT:
    
No focal pneumonia .