Agreement Between Manual and Computerized Designation of Neutral Vertebra in Idiopathic Scoliosis.

Study Design: Survey-based cross-sectional study.

Objectives: To describe interobserver agreement among experienced spine surgeons in choosing neutral vertebra (NV) based on manual measurements from radiographs. Secondarily, to use axial vertebral rotation (AVR) values obtained from low-dose stereoradiography (SR) post-processing software (SterEOS 2D/3D) to separately designate the NV in subject cases and to compare manually derived and software-derived NV designations.