Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are hyperinflated with relative lucency in the upper lungs , suggestive of chronic obstructive pulmonary disease and pulmonary emphysema . Subtle left base opacity may relate to overlapping structures although early consolidation can not be excluded in the appropriate clinical setting . Dedicated PA and lateral views would be helpful for further evaluation . There is no pleural effusion or pneumothorax . The cardiac and mediastinal silhouettes are unremarkable .
    OUTPUT:
    
Chronic changes consistent with COPD . Questionable subtle left base opacity adjacent to the left heart border unclear whether overlapping structures or focal consolidation . Dedicated PA and lateral views of the chest would be helpful for further evaluation .