Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is mildly enlarged . The mediastinal and hilar contours appear unchanged . There is similar mild relative elevation of the right hemidiaphragm . The lungs appear clear . There is no pleural effusion or pneumothorax . Mild degenerative changes are similar along the thoracic spine . Surgical clips project along the left upper quadrant .
    OUTPUT:
    
No evidence of acute disease .