Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are hyperinflated in keeping with history of COPD . The cardiomediastinal silhouette is stable . Calcifications of the aortic arch are noted . No consolidation is identified . There is no pleural effusion or pneumothorax . Focal pleural and parenchymal scarring at the right base appears unchanged .
    OUTPUT:
    
Stable radiographic appearance of the chest , with no evidence of pneumonia . .