Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single frontal view of the chest was obtained . The lungs are hyperinflated , suggesting chronic obstructive pulmonary disease . No focal consolidation , pleural effusion , or evidence of pneumothorax is seen . No evidence of large pleural effusion is seen . There is no pneumothorax . The hilar contours are stable . The aortic knob is calcified . The cardiac silhouette is not enlarged .
    OUTPUT:
    
No acute cardiopulmonary process .