Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac , mediastinal , and hilar contours are normal . Lungs are clear . The pulmonary vascularity is normal . No pleural effusion or pneumothorax is present . There are mild degenerative changes in the thoracic spine as well as within the right acromioclavicular joint .
    OUTPUT:
    
No acute cardiopulmonary process .