Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is status post coronary artery bypass graft surgery as well as mitral valve replacement . The cardiac , mediastinal and hilar contours appear stable . There is no pleural effusion or pneumothorax . There is a mild prominence to the pulmonary interstitium which is a stable finding with no superimposed acute disease . Surgical clips project over the right upper quadrant . Mild - to - moderate degenerative changes are noted along the lower thoracic spine .
    OUTPUT:
    
No evidence of acute disease .