Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A trauma board overlies the patient . The heart size is normal . The hilar and mediastinal contours are within normal limits . The lungs are underinflated , resulting in bronchovascular crowding . Linear bibasilar opacities are most compatible with atelectasis . Multiple left rib fractures are better evaluated on the CT torso examination performed earlier .
    OUTPUT:
    
1 . Multiple left rib fractures , better seen on recent CT examination . 2 . Linear bibasilar pulmonary opacities likely representing atelectasis in the setting of low lung volumes . Refer to CT for further details .