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 appear unchanged . A calcified nodule in the left upper lobe appears not significantly changed . Areas of scarring at each lung apex are likewise stable . There is slight relative elevation of the left hemidiaphragm compared to the right that persists . There is no pleural effusion or pneumothorax . Bony structures are unremarkable .
    OUTPUT:
    
No evidence of acute disease .