Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest demonstrate relative flattening of the hemidiaphragms , as before , likely due to underlying COPD . Bilateral pleural thickening with areas of calcification are stable in appearance . Otherwise , the lungs are clear , with no focal opacities . There is no pleural effusion . The cardiomediastinal silhouette is unremarkable and the heart size is normal .
    OUTPUT:
    
Hyperinflation of the lungs with no acute cardiopulmonary process .