Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is status post coronary artery bypass graft surgery . There is a moderate - sized hiatal hernia , as before . The cardiac , mediastinal and hilar contours appear stable . Calcified pleural plaques are discernible at the base of the right chest , as before . The lungs appear clear . No fracture is identified .
    OUTPUT:
    
No evidence of injury .