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Mean heights along the rim of the superior vertebral endplate, including any ascending syndesmophytes (solid line) and the inferior vertebral endplate, including any descending syndesmophytes (dashed line), in intervertebral disk space with a tallest syndesmophyte of 0.50 or less. A, anterior; AL, anterolateral left; AR, anterolateral right; IDS, intervertebral disc space; P, posterior; PL, posterolateral left; PR, posterolateral right.
