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(A) Method of Leiberman: % height improvement = postkyphoplasty % (2/1 × 100) – prekyphoplasty % value (2/1 × 100) ÷ 100% − prekyphoplasty % value. (B) Cobbs method for measuring focal kyphosis angle, angle between superior end plate of upper normal vertebra and inferior end plate of lower normal vertebra.
