Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are clear . The cardiac contour appears within normal limits . Atherosclerotic calcifications are noted at the aortic arch and the aorta is otherwise unremarkable . No acute fractures are identified . Mild degenerative changes are visualized throughout the thoracic spine .
    OUTPUT:
    
No acute cardiopulmonary process .