Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is mild unfolding of the thoracic aorta . Patchy calcification is noted along the aortic arch . The heart is again at the upper limits of normal size . The lung volumes are low . Lung fields appear clear . There is no pleural effusion or pneumothorax . Bony structures are unremarkable .
    OUTPUT:
    
No evidence of acute disease .