Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are clear . Elevation of the right hemidiaphragm is chronic . Surgical changes related to CABG are unchanged . There is no pneumothorax or pleural effusion . The pulmonary vascularity is normal . Exaggerated kyphosis of the thoracic spine is unchanged .
    OUTPUT:
    
No evidence of pneumonia .