Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size is normal , and the aorta remains tortuous and diffusely calcified . Hilar contours are normal , and the pulmonary vascularity is not engorged . Lungs are clear . No pleural effusion or pneumothorax is present . There are multilevel degenerative changes in the thoracic spine .
    OUTPUT:
    
No acute cardiopulmonary process .