Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is at the upper limits of normal size . The aortic arch is partly calcified . The mediastinal and hilar contours are otherwise unremarkable . There is no pleural effusion or pneumothorax . The lungs appear clear . Bony structures are unremarkable .
    OUTPUT:
    
Heart at the upper limits of normal size . No evidence of acute disease .