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Figure 1

From: Spinal sagittal alignment and trapezoidal deformity in patients with degenerative cervical spondylolisthesis

Figure 1

Visual representations of the methods applied to measure trapezoidal features in radiographs are shown as follows: (1) the ratio of anterior wall height to posterior wall height (A/P), (2) the ratio of superior end-plate width to superior end-plate width plus inferior end-plate width (A/SP), and (3) the ratio of superior end-plate width to inferior end-plate width (S/I).

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