Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Hyperinflation of the lungs is present with flattening of the diaphragms suggestive of underlying COPD . The cardiac silhouette size is normal . The mediastinal and hilar contours are unremarkable . No pulmonary vascular engorgement is seen . Lungs are clear . No pleural effusion or pneumothorax is identified . There are mild degenerative changes in the thoracic spine .
    OUTPUT:
    
Hyperinflated lungs suggestive of underlying COPD . No acute cardiopulmonary abnormality .