Abstract
BACKGROUND CONTEXT: Computed Tomography (CT) is a gold standard method for assessing vertebral rotation, though cost and radiation limit the usability of CT in routine assessment. Additionally, direct intraoperative assessment of rotation for pedicle screw insertion must be done via fluoroscopy or radiography. Accurate assessment of axial rotation is critical, especially for pedicle screw spine instrumentation in scoliosis. A reproducible correlation between plain radiographic views and direct angular measurement allows for easier assessment of rotation both preoperatively and intraoperatively.
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