The value of sitting radiographs: analysis of spine flexibility and its utility in preoperative planning for adult spinal deformity surgery

J Neurosurg Spine. 2018 Oct;29(4):414-421. doi: 10.3171/2018.2.SPINE17749. Epub 2018 Jul 6.


Sitting radiographs are a valuable tool to consider the thoracic compensatory mechanism in patients who are candidates for thoracolumbar correction surgery.

Keywords: ASD = adult spinal deformity; LPA = lumbar pelvic angle; PI-LL mismatch = pelvic incidence–lumbar lordosis mismatch; PJK = proximal junctional kyphosis; PT = pelvic tilt; SVA = sagittal vertical axis; TC = thoracic compensation; TK = T2–12 kyphosis; TLD = thoracolumbar deformity; TLPA = T1–L1 pelvic angle; TPA = T1 pelvic angle; UIV = upper instrumented vertebra; preoperative planning; sitting radiographs; spinal deformity; thoracolumbar correction surgery.

MeSH terms

  • Adult
  • Female
  • Humans
  • Lumbar Vertebrae / surgery*
  • Male
  • Middle Aged
  • Neurosurgical Procedures / adverse effects
  • Postoperative Complications / etiology
  • Postoperative Complications / surgery*
  • Sitting Position*
  • Spinal Fusion / methods
  • Thoracic Vertebrae / surgery*