Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiomediastinal and hilar contours are stable , with the heart in the upper limits of normal . A left chest wall AICD device is seen with leads in the expected position of the right atrium and right ventricle . The patient is status post mitral valve replacement . No consolidation , pleural effusion , or pneumothorax is seen . Bibasilar interstitial opacities are unchanged .
    OUTPUT:
    
No pneumonia . Stable bibasal interstitial lung disease .