Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Low lung volumes cause bronchovascular crowding and bibasilar platelike atelectasis . There is no focal consolidation , large pleural effusion , or pneumothorax . The posterolateral left 6 rib fracture appears more moderately displaced when compared with the prior study , possibly made more prominent by differences in rotation . Additional left - sided rib fractures are unchanged .
    OUTPUT:
    
1 . More moderately displaced left sixth rib fracture may be accentuated by differences in rotation . 2 . Low lung volumes without new consolidation , pneumothorax , or enlarging effusion .