Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is normal in size . The aortic arch is partly calcified . There is slight unfolding of the thoracic aorta . The mediastinal and hilar contours appear otherwise unremarkable . There is no pleural effusion or pneumothorax . Lung markings are attenuated at the apices , suggesting chronic obstructive pulmonary disease . The lungs appear clear however .
    OUTPUT:
    
Findings suggestive of obstructive pulmonary disease . No evidence of acute disease .