Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest are provided . Lungs are hyperinflated , though clear without focal consolidation , effusion , or pneumothorax . The hyperinflation with flattened diaphragms suggests COPD . Cardiomediastinal silhouette is stable with unfolded thoracic aorta . Bony structures are intact with degenerative mild spurring in the mid - to - lower thoracic spine .
    OUTPUT:
    
COPD without superimposed pneumonia .