Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP and lateral views of the chest . The lungs are hyperexpanded but clear of focal consolidation . Streaky bibasilar opacities are similar to prior and may be due to scarring . There is no effusion or pneumothorax . The cardiomediastinal silhouette is within normal limits . No acute osseous abnormality is identified .
    OUTPUT:
    
Hyperinflation without superimposed acute cardiopulmonary process .