Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal upright and lateral chest radiographs demonstrate hyperinflated lungs , similar to the prior examination . Heart is normal in size and cardiomediastinal contours are unremarkable . Lungs are clear . There is no pleural effusion and no pneumothorax .
    OUTPUT:
    
No acute cardiopulmonary abnormality .