Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is mild to moderately enlarged . The patient is status post mitral valve repair . The cardiac , mediastinal and hilar contours appear stable . There is no pleural effusion or pneumothorax . The lungs appear clear . Peripheral reticulation indicates a mild suspected interstitial abnormality , probably unchanged .
    OUTPUT:
    
No evidence of acute cardiopulmonary disease .