Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral chest radiograph demonstrates clear lungs bilaterally . Lungs demonstrate emphysematous changes and hyperinflation , predominantly within bilateral lower lobes . No focal consolidation concerning for pneumonia . The cardiomediastinal and hilar contours are within normal limits , unchanged since prior examination . There is no pleural effusion or pneumothorax . Visualized osseous structures are without acute abnormality .
    OUTPUT:
    
No acute intrathoracic abnormality .