Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac silhouette size is normal . The mediastinal and hilar contours are unremarkable . The pulmonary vascularity is within normal limits . Hyperinflation of lungs is noted . Pleural parenchymal scarring within the lung apices appears relatively unchanged compared to the prior study . The pulmonary vascularity is not engorged . No focal consolidation , pleural effusion or pneumothorax is visualized . A focal left diaphragmatic hernia is unchanged , better assessed on the prior CT . There are no acute osseous abnormalities .
    OUTPUT:
    
No acute cardiopulmonary process .