Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is hyperinflation of the lungs , flattening of the hemidiaphragms , and relative lucency of the upper lung zones consistent with patient 's known COPD . There are no consolidations or pleural effusion . There is no pneumothorax . The cardiomediastinal silhouette is normal . There is stable calcification of the aortic arch . Clips in the left lower lung zone reflect prior wedge resection and are unchanged .
    OUTPUT:
    
1 . No evidence of pneumonia . 2 . Severe COPD .