Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are hyperexpanded and there are changes particularly in the upper lungs of bullous emphysema . The lungs are clear , however . The cardiac and mediastinal contours are normal . There are no pleural abnormalities .
    OUTPUT:
    
1 . No acute cardiac or pulmonary process . 2 . Bullous emphysema , apical predominant .