Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest demonstrate hyperinflated , but clear lungs . There is no free air . The cardiomediastinal silhouette is normal . There is no pleural effusion or pneumothorax . Pleural surfaces are unremarkable .
    OUTPUT:
    
Lung hyperinflation , otherwise normal chest radiograph .