Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral radiographs of the chest demonstrate hyperinflation of the lungs , which can be seen in the setting of emphysema . There is some persistent linear scarring or atelectasis within the right middle lobe . The previously seen left basilar atelectasis is improved . There is no evidence of new focal opacity since the prior study . Bilateral healing rib fractures are again present . The cardiomediastinal silhouette is stable . No pneumothorax or pleural effusion is identified .
    OUTPUT:
    
No acute cardiopulmonary process .