Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is status post mitral valve replacement . The cardiac , mediastinal and hilar contours appear unchanged . There is no pleural effusion or pneumothorax . Bilaterally , calcified pleural plaques are unchanged . A wedge resection site is noted in the right mid lung with a staple line . Mild peripheral reticulation at the lung bases is probably unchanged allowing for differences in technique . The chest is hyperinflated . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
No evidence of acute disease .