Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size is normal . The mediastinal and hilar contours are within normal limits . The pulmonary vascularity is not engorged . Lungs are clear . No pleural effusion or pneumothorax is present . There are no acute osseous abnormalities . Mild degenerative changes of the right acromioclavicular joint are noted .
    OUTPUT:
    
No acute cardiopulmonary process .