Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac , mediastinal and hilar contours appear unchanged . There is a patchy opacity in the right upper lobe that is unchanged suggesting prior scarring . The lungs appear otherwise clear . There are no pleural effusions or pneumothorax . Mild degenerative changes are noted along the mid thoracic spine , including minimal loss of mid thoracic vertebral body heights , not significantly changed .
    OUTPUT:
    
No evidence of acute cardiopulmonary disease .