Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiomediastinal and hilar contours are normal . There is no pleural effusion or pneumothorax . The lungs are hyperexpanded with paucity of blood vessels in the apices , consistent with severe emphysema . There is no focal consolidation concerning for pneumonia . There is no change from the most recent prior study .
    OUTPUT:
    
No acute cardiopulmonary process .