Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiomediastinal and hilar contours are stable with calcifications of the aortic knob . There is no pleural effusion or pneumothorax . Hyperinflation with flattened hemidiaphragms , hilar retraction , and paucity of interstitial markings at the lung apices is consistent with COPD . There is no focal consolidation concerning for pneumonia .
    OUTPUT:
    
No acute cardiopulmonary process . Chronic changes related to COPD .