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. 2017 Jul;38(7):1276–1283. doi: 10.3174/ajnr.A5128

Fig 10.

Fig 10.

Lateral plain film in a patient with recurrent back pain after bilateral pedicle screws at nearly every level. Note dystrophic ossification from a fusion graft. In a patient with extensive postoperative changes, cross-sectional imaging should be obtained to determine whether there is a patent trajectory for the LP.