Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest were provided . There is bibasilar atelectasis , left greater than right . No pneumothorax is seen . Heart size can not be readily assessed . The mediastinum appears normal . There is an acute fracture of the right eighth posterior rib , which is mildly displaced . No additional rib fractures are seen .
    OUTPUT:
    
Bibasilar atelectasis . Left eighth posterior rib fracture . Please refer to subsequent CT of the chest , abdomen and pelvis for further details .