Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral chest radiographs were obtained . The cardiomediastinal and hilar contours are unchanged . Mild calcification of the aortic knob is stable . The posterior costophrenic angles are not entirely included on the lateral view . However , there is no evidence of pleural effusion . There is no pneumothorax . Hyperinflation of the lungs with increased retrosternal airspace and flattening of the hemidiaphragms is again seen , consistent with chronic obstructive pulmonary disease . No consolidation is seen .
    OUTPUT:
    
COPD . No findings to suggest pneumonia .