骨骼系统放射学基础（8）——Jefferson粉碎性骨折(C1)

Figure 8  A, Jefferson burst fracture of C1. On this open-mouth anteroposterior view, widening of the space between the odontoid and the left lateral mass of C1 is apparent. The lateral aspect also projects past the lateral margin of C2 (arrow). B, Fracture of the odontoid. In a different patient, the lateral view of the cervical spine (B1) shows marked soft tissue swelling in front of the body of C2 (white arrows). Discontinuity of the cortex along the anterior surface of C2 (black arrows) is seen, indicating an odontoid fracture. A sagittal reconstruction on a computed tomography scan (B2) shows the fracture much more clearly.