The planning of spine surgery for degenerative lumbar spondylolisthesis (DLS) is currently based on supine MR images while patients experience symptoms in the upright posture. This study employed an upright Open MRI to determine whether the MRI-based measurements of the spinal and neural elements used in planning surgery are different in the symptomatic, upright posture than in the supine posture. We found upright MRI scanning detected dynamic morphometric differences in a number of clinically important radiographic parameters in patients with DLS. Upright MRI may help in planning minimally invasive surgeries for DLS.
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