Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP and lateral radiographs of the chest were acquired . Lung volumes are low . Aside from bibasilar atelectasis and bronchovascular crowding in the lower lungs , the lungs appear clear . Heart size is top normal . The mediastinal contours are normal . There are no pleural effusions . No pneumothorax is seen .
    OUTPUT:
    
Top normal heart size . Otherwise , normal . Low lung volumes .