Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP and lateral chest radiographs demonstrate unchanged mild hyperexpansion of the lungs . There is no focal consolidation , pleural effusion , or pneumothorax . The cardiac silhouette is normal in size , and mediastinal contours are normal , with mild tortuosity of the ascending aorta , unchanged .
    OUTPUT:
    
Unchanged mild hyperinflation , without acute chest abnormality .