Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral chest radiograph demonstrates clear lungs bilaterally . Lungs appear hyperinflated with flattening of hemidiaphragms , suggestive of emphysematous changes . Cardiomediastinal and hilar contours are stable . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
No findings convincing for pneumonia .