Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest were obtained . The lungs appear clear bilaterally . The lungs are also hyperinflated with flattened diaphragms suggestive of underlying COPD . No pleural effusion or pneumothorax is seen . Cardiomediastinal silhouette is normal . No bony abnormalities are seen . No displaced rib fractures are evident .
    OUTPUT:
    
No acute intrathoracic process .