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Preoperative radiographs, CT myelography, and MRI
Fig. 1A, 1B: Standing posteroanterior (A) and lateral (B) radiographs.
Fig. 1C: Sagittal view of CT myelography.
Fig. 1D: Sagittal view of T2-weighted MRI.
PI: pelvic incidence
PT: pelvic tilt
SS: sacral slope
TK: thoracic kyphosis
LL: lumbar lordosis
LLL: lower lumbar lordosis
SVA: sagittal vertical axis
