Fig. 4

a Bone cement distribution near the L2 line. b CT transverse image of the vertebral body in figure a suggests bone cement leakage into the spinal canal. BCSD represents the maximum sagittal diameter of bone cement leakage into the spinal canal. c BCA shows the area of bone cement leakage into the spinal canal. d SCA shows the area of the bony spinal canal at the same level as b