Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral chest radiograph demonstrates clear lungs bilaterally . Hyperinflated lungs reflect known emphysema , better assessed on prior CT from ___ . No focal consolidation is identified . The cardiomediastinal and hilar contours are within normal limits . There is no pleural effusion or pneumothorax . Visualized osseous structures are without acute abnormality .
    OUTPUT:
    
Emphysema without superimposed acute process .