Fig. 5

Follow-up computed tomography images showing a case of multiple fracture sites in the same rib. (a) Illustration of the boundaries used to define fracture location in three fields (anterior/lateral/posterior), created in steps of 120° around the center of the ipsilateral lung in the axial plane. No evidence of fracture in the right 6th rib was observed at 20 months after therapy. (b) The initial fracture site of the right 6th rib appeared in the lateral field (white arrow). (c) The subsequent fracture site appeared in the same rib, in the posterior field (red arrow).