Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is normal with mild unfolding of the thoracic aorta . Calcifications are again demonstrated in the aortic knob . Calcifications also project over the right lung base are within the breast based on prior CT . Hilar contours are unremarkable . Lungs are clear . Pleural surfaces are clear without effusion or pneumothorax . Mild anterior wedging of a mid thoracic vertebral body is unchanged .
    OUTPUT:
    
No acute cardiopulmonary abnormality .